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godot/modules/gdscript/gdscript_parser.cpp

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/*************************************************************************/
/* gdscript_parser.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "gdscript_parser.h"
#include "core/io/resource_loader.h"
#include "core/math/math_defs.h"
#include "core/os/file_access.h"
#include "core/project_settings.h"
#include "gdscript.h"
#ifdef DEBUG_ENABLED
#include "core/os/os.h"
#include "core/string_builder.h"
#endif // DEBUG_ENABLED
#ifdef TOOLS_ENABLED
#include "editor/editor_settings.h"
#endif // TOOLS_ENABLED
static HashMap<StringName, Variant::Type> builtin_types;
Variant::Type GDScriptParser::get_builtin_type(const StringName &p_type) {
if (builtin_types.empty()) {
builtin_types["bool"] = Variant::BOOL;
builtin_types["int"] = Variant::INT;
builtin_types["float"] = Variant::FLOAT;
builtin_types["String"] = Variant::STRING;
builtin_types["Vector2"] = Variant::VECTOR2;
builtin_types["Vector2i"] = Variant::VECTOR2I;
builtin_types["Rect2"] = Variant::RECT2;
builtin_types["Rect2i"] = Variant::RECT2I;
builtin_types["Transform2D"] = Variant::TRANSFORM2D;
builtin_types["Vector3"] = Variant::VECTOR3;
builtin_types["Vector3i"] = Variant::VECTOR3I;
builtin_types["AABB"] = Variant::AABB;
builtin_types["Plane"] = Variant::PLANE;
builtin_types["Quat"] = Variant::QUAT;
builtin_types["Basis"] = Variant::BASIS;
builtin_types["Transform"] = Variant::TRANSFORM;
builtin_types["Color"] = Variant::COLOR;
builtin_types["RID"] = Variant::_RID;
builtin_types["Object"] = Variant::OBJECT;
builtin_types["StringName"] = Variant::STRING_NAME;
builtin_types["NodePath"] = Variant::NODE_PATH;
builtin_types["Dictionary"] = Variant::DICTIONARY;
builtin_types["Callable"] = Variant::CALLABLE;
builtin_types["Signal"] = Variant::SIGNAL;
builtin_types["Array"] = Variant::ARRAY;
builtin_types["PackedByteArray"] = Variant::PACKED_BYTE_ARRAY;
builtin_types["PackedInt32Array"] = Variant::PACKED_INT32_ARRAY;
builtin_types["PackedInt64Array"] = Variant::PACKED_INT64_ARRAY;
builtin_types["PackedFloat32Array"] = Variant::PACKED_FLOAT32_ARRAY;
builtin_types["PackedFloat64Array"] = Variant::PACKED_FLOAT64_ARRAY;
builtin_types["PackedStringArray"] = Variant::PACKED_STRING_ARRAY;
builtin_types["PackedVector2Array"] = Variant::PACKED_VECTOR2_ARRAY;
builtin_types["PackedVector3Array"] = Variant::PACKED_VECTOR3_ARRAY;
builtin_types["PackedColorArray"] = Variant::PACKED_COLOR_ARRAY;
// NIL is not here, hence the -1.
if (builtin_types.size() != Variant::VARIANT_MAX - 1) {
ERR_PRINT("Outdated parser: amount of built-in types don't match the amount of types in Variant.");
}
}
if (builtin_types.has(p_type)) {
return builtin_types[p_type];
}
return Variant::VARIANT_MAX;
}
void GDScriptParser::cleanup() {
builtin_types.clear();
}
GDScriptFunctions::Function GDScriptParser::get_builtin_function(const StringName &p_name) {
for (int i = 0; i < GDScriptFunctions::FUNC_MAX; i++) {
if (p_name == GDScriptFunctions::get_func_name(GDScriptFunctions::Function(i))) {
return GDScriptFunctions::Function(i);
}
}
return GDScriptFunctions::FUNC_MAX;
}
void GDScriptParser::get_annotation_list(List<MethodInfo> *r_annotations) const {
List<StringName> keys;
valid_annotations.get_key_list(&keys);
for (const List<StringName>::Element *E = keys.front(); E != nullptr; E = E->next()) {
r_annotations->push_back(valid_annotations[E->get()].info);
}
}
GDScriptParser::GDScriptParser() {
// Register valid annotations.
// TODO: Should this be static?
// TODO: Validate applicable types (e.g. a VARIABLE annotation that only applies to string variables).
register_annotation(MethodInfo("@tool"), AnnotationInfo::SCRIPT, &GDScriptParser::tool_annotation);
register_annotation(MethodInfo("@icon", { Variant::STRING, "icon_path" }), AnnotationInfo::SCRIPT, &GDScriptParser::icon_annotation);
register_annotation(MethodInfo("@onready"), AnnotationInfo::VARIABLE, &GDScriptParser::onready_annotation);
// Export annotations.
register_annotation(MethodInfo("@export"), AnnotationInfo::VARIABLE, &GDScriptParser::export_annotations<PROPERTY_HINT_TYPE_STRING, Variant::NIL>);
register_annotation(MethodInfo("@export_enum", { Variant::STRING, "names" }), AnnotationInfo::VARIABLE, &GDScriptParser::export_annotations<PROPERTY_HINT_ENUM, Variant::INT>, 0, true);
register_annotation(MethodInfo("@export_file", { Variant::STRING, "filter" }), AnnotationInfo::VARIABLE, &GDScriptParser::export_annotations<PROPERTY_HINT_FILE, Variant::STRING>, 1, true);
register_annotation(MethodInfo("@export_dir"), AnnotationInfo::VARIABLE, &GDScriptParser::export_annotations<PROPERTY_HINT_DIR, Variant::STRING>);
register_annotation(MethodInfo("@export_global_file", { Variant::STRING, "filter" }), AnnotationInfo::VARIABLE, &GDScriptParser::export_annotations<PROPERTY_HINT_GLOBAL_FILE, Variant::STRING>, 1, true);
register_annotation(MethodInfo("@export_global_dir"), AnnotationInfo::VARIABLE, &GDScriptParser::export_annotations<PROPERTY_HINT_GLOBAL_DIR, Variant::STRING>);
register_annotation(MethodInfo("@export_multiline"), AnnotationInfo::VARIABLE, &GDScriptParser::export_annotations<PROPERTY_HINT_MULTILINE_TEXT, Variant::STRING>);
register_annotation(MethodInfo("@export_placeholder"), AnnotationInfo::VARIABLE, &GDScriptParser::export_annotations<PROPERTY_HINT_PLACEHOLDER_TEXT, Variant::STRING>);
register_annotation(MethodInfo("@export_range", { Variant::FLOAT, "min" }, { Variant::FLOAT, "max" }, { Variant::FLOAT, "step" }, { Variant::STRING, "slider1" }, { Variant::STRING, "slider2" }), AnnotationInfo::VARIABLE, &GDScriptParser::export_annotations<PROPERTY_HINT_RANGE, Variant::FLOAT>, 3);
register_annotation(MethodInfo("@export_exp_range", { Variant::FLOAT, "min" }, { Variant::FLOAT, "max" }, { Variant::FLOAT, "step" }, { Variant::STRING, "slider1" }, { Variant::STRING, "slider2" }), AnnotationInfo::VARIABLE, &GDScriptParser::export_annotations<PROPERTY_HINT_EXP_RANGE, Variant::FLOAT>, 3);
register_annotation(MethodInfo("@export_exp_easing", { Variant::STRING, "hint1" }, { Variant::STRING, "hint2" }), AnnotationInfo::VARIABLE, &GDScriptParser::export_annotations<PROPERTY_HINT_EXP_EASING, Variant::FLOAT>, 2);
register_annotation(MethodInfo("@export_color_no_alpha"), AnnotationInfo::VARIABLE, &GDScriptParser::export_annotations<PROPERTY_HINT_COLOR_NO_ALPHA, Variant::COLOR>);
register_annotation(MethodInfo("@export_node_path", { Variant::STRING, "type" }), AnnotationInfo::VARIABLE, &GDScriptParser::export_annotations<PROPERTY_HINT_NODE_PATH_VALID_TYPES, Variant::NODE_PATH>, 1, true);
register_annotation(MethodInfo("@export_flags", { Variant::STRING, "names" }), AnnotationInfo::VARIABLE, &GDScriptParser::export_annotations<PROPERTY_HINT_FLAGS, Variant::INT>, 0, true);
register_annotation(MethodInfo("@export_flags_2d_render"), AnnotationInfo::VARIABLE, &GDScriptParser::export_annotations<PROPERTY_HINT_LAYERS_2D_RENDER, Variant::INT>);
register_annotation(MethodInfo("@export_flags_2d_physics"), AnnotationInfo::VARIABLE, &GDScriptParser::export_annotations<PROPERTY_HINT_LAYERS_2D_PHYSICS, Variant::INT>);
register_annotation(MethodInfo("@export_flags_3d_render"), AnnotationInfo::VARIABLE, &GDScriptParser::export_annotations<PROPERTY_HINT_LAYERS_3D_RENDER, Variant::INT>);
register_annotation(MethodInfo("@export_flags_3d_physics"), AnnotationInfo::VARIABLE, &GDScriptParser::export_annotations<PROPERTY_HINT_LAYERS_3D_PHYSICS, Variant::INT>);
// Networking.
register_annotation(MethodInfo("@remote"), AnnotationInfo::VARIABLE | AnnotationInfo::FUNCTION, &GDScriptParser::network_annotations<MultiplayerAPI::RPC_MODE_REMOTE>);
register_annotation(MethodInfo("@master"), AnnotationInfo::VARIABLE | AnnotationInfo::FUNCTION, &GDScriptParser::network_annotations<MultiplayerAPI::RPC_MODE_MASTER>);
register_annotation(MethodInfo("@puppet"), AnnotationInfo::VARIABLE | AnnotationInfo::FUNCTION, &GDScriptParser::network_annotations<MultiplayerAPI::RPC_MODE_PUPPET>);
register_annotation(MethodInfo("@remotesync"), AnnotationInfo::VARIABLE | AnnotationInfo::FUNCTION, &GDScriptParser::network_annotations<MultiplayerAPI::RPC_MODE_REMOTESYNC>);
register_annotation(MethodInfo("@mastersync"), AnnotationInfo::VARIABLE | AnnotationInfo::FUNCTION, &GDScriptParser::network_annotations<MultiplayerAPI::RPC_MODE_MASTERSYNC>);
register_annotation(MethodInfo("@puppetsync"), AnnotationInfo::VARIABLE | AnnotationInfo::FUNCTION, &GDScriptParser::network_annotations<MultiplayerAPI::RPC_MODE_PUPPETSYNC>);
// TODO: Warning annotations.
}
GDScriptParser::~GDScriptParser() {
clear();
}
void GDScriptParser::clear() {
while (list != nullptr) {
Node *element = list;
list = list->next;
memdelete(element);
}
head = nullptr;
list = nullptr;
_is_tool = false;
for_completion = false;
errors.clear();
multiline_stack.clear();
}
void GDScriptParser::push_error(const String &p_message, const Node *p_origin) {
// TODO: Improve error reporting by pointing at source code.
// TODO: Errors might point at more than one place at once (e.g. show previous declaration).
panic_mode = true;
// TODO: Improve positional information.
if (p_origin == nullptr) {
errors.push_back({ p_message, current.start_line, current.start_column });
} else {
errors.push_back({ p_message, p_origin->start_line, p_origin->leftmost_column });
}
}
#ifdef DEBUG_ENABLED
void GDScriptParser::push_warning(const Node *p_source, GDScriptWarning::Code p_code, const String &p_symbol1, const String &p_symbol2, const String &p_symbol3, const String &p_symbol4) {
Vector<String> symbols;
if (!p_symbol1.empty()) {
symbols.push_back(p_symbol1);
}
if (!p_symbol2.empty()) {
symbols.push_back(p_symbol2);
}
if (!p_symbol3.empty()) {
symbols.push_back(p_symbol3);
}
if (!p_symbol4.empty()) {
symbols.push_back(p_symbol4);
}
push_warning(p_source, p_code, symbols);
}
void GDScriptParser::push_warning(const Node *p_source, GDScriptWarning::Code p_code, const Vector<String> &p_symbols) {
if (is_ignoring_warnings) {
return;
}
if (GLOBAL_GET("debug/gdscript/warnings/exclude_addons").booleanize() && script_path.begins_with("res://addons/")) {
return;
}
String warn_name = GDScriptWarning::get_name_from_code((GDScriptWarning::Code)p_code).to_lower();
if (ignored_warnings.has(warn_name)) {
return;
}
if (!GLOBAL_GET("debug/gdscript/warnings/" + warn_name)) {
return;
}
GDScriptWarning warning;
warning.code = p_code;
warning.symbols = p_symbols;
warning.start_line = p_source->start_line;
warning.end_line = p_source->end_line;
warning.leftmost_column = p_source->leftmost_column;
warning.rightmost_column = p_source->rightmost_column;
List<GDScriptWarning>::Element *before = nullptr;
for (List<GDScriptWarning>::Element *E = warnings.front(); E != nullptr; E = E->next()) {
if (E->get().start_line > warning.start_line) {
break;
}
before = E;
}
if (before) {
warnings.insert_after(before, warning);
} else {
warnings.push_front(warning);
}
}
#endif
void GDScriptParser::make_completion_context(CompletionType p_type, Node *p_node, int p_argument, bool p_force) {
if (!for_completion || (!p_force && completion_context.type != COMPLETION_NONE)) {
return;
}
if (previous.cursor_place != GDScriptTokenizer::CURSOR_MIDDLE && previous.cursor_place != GDScriptTokenizer::CURSOR_END && current.cursor_place == GDScriptTokenizer::CURSOR_NONE) {
return;
}
CompletionContext context;
context.type = p_type;
context.current_class = current_class;
context.current_function = current_function;
context.current_suite = current_suite;
context.current_line = tokenizer.get_cursor_line();
context.current_argument = p_argument;
context.node = p_node;
completion_context = context;
}
void GDScriptParser::make_completion_context(CompletionType p_type, Variant::Type p_builtin_type, bool p_force) {
if (!for_completion || (!p_force && completion_context.type != COMPLETION_NONE)) {
return;
}
if (previous.cursor_place != GDScriptTokenizer::CURSOR_MIDDLE && previous.cursor_place != GDScriptTokenizer::CURSOR_END && current.cursor_place == GDScriptTokenizer::CURSOR_NONE) {
return;
}
CompletionContext context;
context.type = p_type;
context.current_class = current_class;
context.current_function = current_function;
context.current_suite = current_suite;
context.current_line = tokenizer.get_cursor_line();
context.builtin_type = p_builtin_type;
completion_context = context;
}
void GDScriptParser::push_completion_call(Node *p_call) {
if (!for_completion) {
return;
}
CompletionCall call;
call.call = p_call;
call.argument = 0;
completion_call_stack.push_back(call);
if (previous.cursor_place == GDScriptTokenizer::CURSOR_MIDDLE || previous.cursor_place == GDScriptTokenizer::CURSOR_END || current.cursor_place == GDScriptTokenizer::CURSOR_BEGINNING) {
completion_call = call;
}
}
void GDScriptParser::pop_completion_call() {
if (!for_completion) {
return;
}
ERR_FAIL_COND_MSG(completion_call_stack.empty(), "Trying to pop empty completion call stack");
completion_call_stack.pop_back();
}
void GDScriptParser::set_last_completion_call_arg(int p_argument) {
if (!for_completion || passed_cursor) {
return;
}
ERR_FAIL_COND_MSG(completion_call_stack.empty(), "Trying to set argument on empty completion call stack");
completion_call_stack.back()->get().argument = p_argument;
}
Error GDScriptParser::parse(const String &p_source_code, const String &p_script_path, bool p_for_completion) {
clear();
String source = p_source_code;
int cursor_line = -1;
int cursor_column = -1;
for_completion = p_for_completion;
int tab_size = 4;
#ifdef TOOLS_ENABLED
if (EditorSettings::get_singleton()) {
tab_size = EditorSettings::get_singleton()->get_setting("text_editor/indent/size");
}
#endif // TOOLS_ENABLED
if (p_for_completion) {
// Remove cursor sentinel char.
const Vector<String> lines = p_source_code.split("\n");
cursor_line = 1;
cursor_column = 1;
for (int i = 0; i < lines.size(); i++) {
bool found = false;
const String &line = lines[i];
for (int j = 0; j < line.size(); j++) {
if (line[j] == char32_t(0xFFFF)) {
found = true;
break;
} else if (line[j] == '\t') {
cursor_column += tab_size - 1;
}
cursor_column++;
}
if (found) {
break;
}
cursor_line++;
cursor_column = 1;
}
source = source.replace_first(String::chr(0xFFFF), String());
}
tokenizer.set_source_code(source);
tokenizer.set_cursor_position(cursor_line, cursor_column);
script_path = p_script_path;
current = tokenizer.scan();
// Avoid error as the first token.
while (current.type == GDScriptTokenizer::Token::ERROR) {
push_error(current.literal);
current = tokenizer.scan();
}
push_multiline(false); // Keep one for the whole parsing.
parse_program();
pop_multiline();
#ifdef DEBUG_ENABLED
if (multiline_stack.size() > 0) {
ERR_PRINT("Parser bug: Imbalanced multiline stack.");
}
#endif
if (errors.empty()) {
return OK;
} else {
return ERR_PARSE_ERROR;
}
}
GDScriptTokenizer::Token GDScriptParser::advance() {
if (current.type == GDScriptTokenizer::Token::TK_EOF) {
ERR_FAIL_COND_V_MSG(current.type == GDScriptTokenizer::Token::TK_EOF, current, "GDScript parser bug: Trying to advance past the end of stream.");
}
if (for_completion && !completion_call_stack.empty()) {
if (completion_call.call == nullptr && tokenizer.is_past_cursor()) {
completion_call = completion_call_stack.back()->get();
passed_cursor = true;
}
}
previous = current;
current = tokenizer.scan();
while (current.type == GDScriptTokenizer::Token::ERROR) {
push_error(current.literal);
current = tokenizer.scan();
}
return previous;
}
bool GDScriptParser::match(GDScriptTokenizer::Token::Type p_token_type) {
if (!check(p_token_type)) {
return false;
}
advance();
return true;
}
bool GDScriptParser::check(GDScriptTokenizer::Token::Type p_token_type) {
if (p_token_type == GDScriptTokenizer::Token::IDENTIFIER) {
return current.is_identifier();
}
return current.type == p_token_type;
}
bool GDScriptParser::consume(GDScriptTokenizer::Token::Type p_token_type, const String &p_error_message) {
if (match(p_token_type)) {
return true;
}
push_error(p_error_message);
return false;
}
bool GDScriptParser::is_at_end() {
return check(GDScriptTokenizer::Token::TK_EOF);
}
void GDScriptParser::synchronize() {
panic_mode = false;
while (!is_at_end()) {
if (previous.type == GDScriptTokenizer::Token::NEWLINE || previous.type == GDScriptTokenizer::Token::SEMICOLON) {
return;
}
switch (current.type) {
case GDScriptTokenizer::Token::CLASS:
case GDScriptTokenizer::Token::FUNC:
case GDScriptTokenizer::Token::STATIC:
case GDScriptTokenizer::Token::VAR:
case GDScriptTokenizer::Token::CONST:
case GDScriptTokenizer::Token::SIGNAL:
//case GDScriptTokenizer::Token::IF: // Can also be inside expressions.
case GDScriptTokenizer::Token::FOR:
case GDScriptTokenizer::Token::WHILE:
case GDScriptTokenizer::Token::MATCH:
case GDScriptTokenizer::Token::RETURN:
case GDScriptTokenizer::Token::ANNOTATION:
return;
default:
// Do nothing.
break;
}
advance();
}
}
void GDScriptParser::push_multiline(bool p_state) {
multiline_stack.push_back(p_state);
tokenizer.set_multiline_mode(p_state);
if (p_state) {
// Consume potential whitespace tokens already waiting in line.
while (current.type == GDScriptTokenizer::Token::NEWLINE || current.type == GDScriptTokenizer::Token::INDENT || current.type == GDScriptTokenizer::Token::DEDENT) {
current = tokenizer.scan(); // Don't call advance() here, as we don't want to change the previous token.
}
}
}
void GDScriptParser::pop_multiline() {
ERR_FAIL_COND_MSG(multiline_stack.size() == 0, "Parser bug: trying to pop from multiline stack without available value.");
multiline_stack.pop_back();
tokenizer.set_multiline_mode(multiline_stack.size() > 0 ? multiline_stack.back()->get() : false);
}
bool GDScriptParser::is_statement_end() {
return check(GDScriptTokenizer::Token::NEWLINE) || check(GDScriptTokenizer::Token::SEMICOLON) || check(GDScriptTokenizer::Token::TK_EOF);
}
void GDScriptParser::end_statement(const String &p_context) {
bool found = false;
while (is_statement_end() && !is_at_end()) {
// Remove sequential newlines/semicolons.
found = true;
advance();
}
if (!found && !is_at_end()) {
push_error(vformat(R"(Expected end of statement after %s, found "%s" instead.)", p_context, current.get_name()));
}
}
void GDScriptParser::parse_program() {
head = alloc_node<ClassNode>();
current_class = head;
if (match(GDScriptTokenizer::Token::ANNOTATION)) {
// Check for @tool annotation.
AnnotationNode *annotation = parse_annotation(AnnotationInfo::SCRIPT | AnnotationInfo::CLASS_LEVEL);
if (annotation != nullptr) {
if (annotation->name == "@tool") {
// TODO: don't allow @tool anywhere else. (Should all script annotations be the first thing?).
_is_tool = true;
if (previous.type != GDScriptTokenizer::Token::NEWLINE) {
push_error(R"(Expected newline after "@tool" annotation.)");
}
// @tool annotation has no specific target.
annotation->apply(this, nullptr);
} else {
annotation_stack.push_back(annotation);
}
}
}
for (bool should_break = false; !should_break;) {
// Order here doesn't matter, but there should be only one of each at most.
switch (current.type) {
case GDScriptTokenizer::Token::CLASS_NAME:
if (!annotation_stack.empty()) {
push_error(R"("class_name" should be used before annotations.)");
}
advance();
if (head->identifier != nullptr) {
push_error(R"("class_name" can only be used once.)");
} else {
parse_class_name();
}
break;
case GDScriptTokenizer::Token::EXTENDS:
if (!annotation_stack.empty()) {
push_error(R"("extends" should be used before annotations.)");
}
advance();
if (head->extends_used) {
push_error(R"("extends" can only be used once.)");
} else {
parse_extends();
end_statement("superclass");
}
break;
default:
should_break = true;
break;
}
if (panic_mode) {
synchronize();
}
}
if (match(GDScriptTokenizer::Token::ANNOTATION)) {
// Check for @icon annotation.
AnnotationNode *annotation = parse_annotation(AnnotationInfo::SCRIPT | AnnotationInfo::CLASS_LEVEL);
if (annotation != nullptr) {
if (annotation->name == "@icon") {
if (previous.type != GDScriptTokenizer::Token::NEWLINE) {
push_error(R"(Expected newline after "@icon" annotation.)");
}
annotation->apply(this, head);
} else {
annotation_stack.push_back(annotation);
}
}
}
parse_class_body();
if (!check(GDScriptTokenizer::Token::TK_EOF)) {
push_error("Expected end of file.");
}
clear_unused_annotations();
}
GDScriptParser::ClassNode *GDScriptParser::parse_class() {
ClassNode *n_class = alloc_node<ClassNode>();
ClassNode *previous_class = current_class;
current_class = n_class;
n_class->outer = previous_class;
if (consume(GDScriptTokenizer::Token::IDENTIFIER, R"(Expected identifier for the class name after "class".)")) {
n_class->identifier = parse_identifier();
}
if (match(GDScriptTokenizer::Token::EXTENDS)) {
parse_extends();
}
consume(GDScriptTokenizer::Token::COLON, R"(Expected ":" after class declaration.)");
consume(GDScriptTokenizer::Token::NEWLINE, R"(Expected newline after class declaration.)");
if (!consume(GDScriptTokenizer::Token::INDENT, R"(Expected indented block after class declaration.)")) {
current_class = previous_class;
return n_class;
}
if (match(GDScriptTokenizer::Token::EXTENDS)) {
if (n_class->extends_used) {
push_error(R"(Cannot use "extends" more than once in the same class.)");
}
parse_extends();
end_statement("superclass");
}
parse_class_body();
consume(GDScriptTokenizer::Token::DEDENT, R"(Missing unindent at the end of the class body.)");
current_class = previous_class;
return n_class;
}
void GDScriptParser::parse_class_name() {
if (consume(GDScriptTokenizer::Token::IDENTIFIER, R"(Expected identifier for the global class name after "class_name".)")) {
current_class->identifier = parse_identifier();
}
// TODO: Move this to annotation
if (match(GDScriptTokenizer::Token::COMMA)) {
// Icon path.
if (consume(GDScriptTokenizer::Token::LITERAL, R"(Expected class icon path string after ",".)")) {
if (previous.literal.get_type() != Variant::STRING) {
push_error(vformat(R"(Only strings can be used for the class icon path, found "%s" instead.)", Variant::get_type_name(previous.literal.get_type())));
}
current_class->icon_path = previous.literal;
}
}
if (match(GDScriptTokenizer::Token::EXTENDS)) {
// Allow extends on the same line.
parse_extends();
end_statement("superclass");
} else {
end_statement("class_name statement");
}
}
void GDScriptParser::parse_extends() {
current_class->extends_used = true;
int chain_index = 0;
if (match(GDScriptTokenizer::Token::LITERAL)) {
if (previous.literal.get_type() != Variant::STRING) {
push_error(vformat(R"(Only strings or identifiers can be used after "extends", found "%s" instead.)", Variant::get_type_name(previous.literal.get_type())));
}
current_class->extends_path = previous.literal;
if (!match(GDScriptTokenizer::Token::PERIOD)) {
return;
}
}
make_completion_context(COMPLETION_INHERIT_TYPE, current_class, chain_index++);
if (!consume(GDScriptTokenizer::Token::IDENTIFIER, R"(Expected superclass name after "extends".)")) {
return;
}
current_class->extends.push_back(previous.literal);
while (match(GDScriptTokenizer::Token::PERIOD)) {
make_completion_context(COMPLETION_INHERIT_TYPE, current_class, chain_index++);
if (!consume(GDScriptTokenizer::Token::IDENTIFIER, R"(Expected superclass name after ".".)")) {
return;
}
current_class->extends.push_back(previous.literal);
}
}
template <class T>
void GDScriptParser::parse_class_member(T *(GDScriptParser::*p_parse_function)(), AnnotationInfo::TargetKind p_target, const String &p_member_kind) {
advance();
T *member = (this->*p_parse_function)();
if (member == nullptr) {
return;
}
// Consume annotations.
while (!annotation_stack.empty()) {
AnnotationNode *last_annotation = annotation_stack.back()->get();
if (last_annotation->applies_to(p_target)) {
last_annotation->apply(this, member);
member->annotations.push_front(last_annotation);
annotation_stack.pop_back();
} else {
push_error(vformat(R"(Annotation "%s" cannot be applied to a %s.)", last_annotation->name, p_member_kind));
clear_unused_annotations();
return;
}
}
if (member->identifier != nullptr) {
// Enums may be unnamed.
// TODO: Consider names in outer scope too, for constants and classes (and static functions?)
if (current_class->members_indices.has(member->identifier->name)) {
push_error(vformat(R"(%s "%s" has the same name as a previously declared %s.)", p_member_kind.capitalize(), member->identifier->name, current_class->get_member(member->identifier->name).get_type_name()), member->identifier);
} else {
current_class->add_member(member);
}
}
}
void GDScriptParser::parse_class_body() {
bool class_end = false;
while (!class_end && !is_at_end()) {
switch (current.type) {
case GDScriptTokenizer::Token::VAR:
parse_class_member(&GDScriptParser::parse_variable, AnnotationInfo::VARIABLE, "variable");
break;
case GDScriptTokenizer::Token::CONST:
parse_class_member(&GDScriptParser::parse_constant, AnnotationInfo::CONSTANT, "constant");
break;
case GDScriptTokenizer::Token::SIGNAL:
parse_class_member(&GDScriptParser::parse_signal, AnnotationInfo::SIGNAL, "signal");
break;
case GDScriptTokenizer::Token::STATIC:
case GDScriptTokenizer::Token::FUNC:
parse_class_member(&GDScriptParser::parse_function, AnnotationInfo::FUNCTION, "function");
break;
case GDScriptTokenizer::Token::CLASS:
parse_class_member(&GDScriptParser::parse_class, AnnotationInfo::CLASS, "class");
break;
case GDScriptTokenizer::Token::ENUM:
parse_class_member(&GDScriptParser::parse_enum, AnnotationInfo::NONE, "enum");
break;
case GDScriptTokenizer::Token::ANNOTATION: {
advance();
AnnotationNode *annotation = parse_annotation(AnnotationInfo::CLASS_LEVEL);
if (annotation != nullptr) {
annotation_stack.push_back(annotation);
}
break;
}
case GDScriptTokenizer::Token::PASS:
advance();
end_statement(R"("pass")");
break;
case GDScriptTokenizer::Token::DEDENT:
class_end = true;
break;
default:
push_error(vformat(R"(Unexpected "%s" in class body.)", current.get_name()));
advance();
break;
}
if (panic_mode) {
synchronize();
}
}
}
GDScriptParser::VariableNode *GDScriptParser::parse_variable() {
return parse_variable(true);
}
GDScriptParser::VariableNode *GDScriptParser::parse_variable(bool p_allow_property) {
if (!consume(GDScriptTokenizer::Token::IDENTIFIER, R"(Expected variable name after "var".)")) {
return nullptr;
}
VariableNode *variable = alloc_node<VariableNode>();
variable->identifier = parse_identifier();
if (match(GDScriptTokenizer::Token::COLON)) {
if (check(GDScriptTokenizer::Token::NEWLINE)) {
if (p_allow_property) {
advance();
return parse_property(variable, true);
} else {
push_error(R"(Expected type after ":")");
return nullptr;
}
} else if (check((GDScriptTokenizer::Token::EQUAL))) {
// Infer type.
variable->infer_datatype = true;
} else {
if (p_allow_property) {
make_completion_context(COMPLETION_PROPERTY_DECLARATION_OR_TYPE, variable);
if (check(GDScriptTokenizer::Token::IDENTIFIER)) {
// Check if get or set.
if (current.get_identifier() == "get" || current.get_identifier() == "set") {
return parse_property(variable, false);
}
}
}
// Parse type.
variable->datatype_specifier = parse_type();
}
}
if (match(GDScriptTokenizer::Token::EQUAL)) {
// Initializer.
variable->initializer = parse_expression(false);
variable->assignments++;
}
if (p_allow_property && match(GDScriptTokenizer::Token::COLON)) {
if (match(GDScriptTokenizer::Token::NEWLINE)) {
return parse_property(variable, true);
} else {
return parse_property(variable, false);
}
}
end_statement("variable declaration");
variable->export_info.name = variable->identifier->name;
return variable;
}
GDScriptParser::VariableNode *GDScriptParser::parse_property(VariableNode *p_variable, bool p_need_indent) {
if (p_need_indent) {
if (!consume(GDScriptTokenizer::Token::INDENT, R"(Expected indented block for property after ":".)")) {
return nullptr;
}
}
VariableNode *property = p_variable;
make_completion_context(COMPLETION_PROPERTY_DECLARATION, property);
if (!consume(GDScriptTokenizer::Token::IDENTIFIER, R"(Expected "get" or "set" for property declaration.)")) {
return nullptr;
}
IdentifierNode *function = parse_identifier();
if (check(GDScriptTokenizer::Token::EQUAL)) {
p_variable->property = VariableNode::PROP_SETGET;
} else {
p_variable->property = VariableNode::PROP_INLINE;
if (!p_need_indent) {
push_error("Property with inline code must go to an indented block.");
}
}
bool getter_used = false;
bool setter_used = false;
// Run with a loop because order doesn't matter.
for (int i = 0; i < 2; i++) {
if (function->name == "set") {
if (setter_used) {
push_error(R"(Properties can only have one setter.)");
} else {
parse_property_setter(property);
setter_used = true;
}
} else if (function->name == "get") {
if (getter_used) {
push_error(R"(Properties can only have one getter.)");
} else {
parse_property_getter(property);
getter_used = true;
}
} else {
// TODO: Update message to only have the missing one if it's the case.
push_error(R"(Expected "get" or "set" for property declaration.)");
}
if (i == 0 && p_variable->property == VariableNode::PROP_SETGET) {
if (match(GDScriptTokenizer::Token::COMMA)) {
// Consume potential newline.
if (match(GDScriptTokenizer::Token::NEWLINE)) {
if (!p_need_indent) {
push_error(R"(Inline setter/getter setting cannot span across multiple lines (use "\\"" if needed).)");
}
}
} else {
break;
}
}
if (!match(GDScriptTokenizer::Token::IDENTIFIER)) {
break;
}
function = parse_identifier();
}
if (p_variable->property == VariableNode::PROP_SETGET) {
end_statement("property declaration");
}
if (p_need_indent) {
consume(GDScriptTokenizer::Token::DEDENT, R"(Expected end of indented block for property.)");
}
return property;
}
void GDScriptParser::parse_property_setter(VariableNode *p_variable) {
switch (p_variable->property) {
case VariableNode::PROP_INLINE:
consume(GDScriptTokenizer::Token::PARENTHESIS_OPEN, R"(Expected "(" after "set".)");
if (consume(GDScriptTokenizer::Token::IDENTIFIER, R"(Expected parameter name after "(".)")) {
p_variable->setter_parameter = parse_identifier();
}
consume(GDScriptTokenizer::Token::PARENTHESIS_CLOSE, R"*(Expected ")" after parameter name.)*");
consume(GDScriptTokenizer::Token::COLON, R"*(Expected ":" after ")".)*");
p_variable->setter = parse_suite("setter definition");
break;
case VariableNode::PROP_SETGET:
consume(GDScriptTokenizer::Token::EQUAL, R"(Expected "=" after "set")");
make_completion_context(COMPLETION_PROPERTY_METHOD, p_variable);
if (consume(GDScriptTokenizer::Token::IDENTIFIER, R"(Expected setter function name after "=".)")) {
p_variable->setter_pointer = parse_identifier();
}
break;
case VariableNode::PROP_NONE:
break; // Unreachable.
}
}
void GDScriptParser::parse_property_getter(VariableNode *p_variable) {
switch (p_variable->property) {
case VariableNode::PROP_INLINE:
consume(GDScriptTokenizer::Token::COLON, R"(Expected ":" after "get".)");
p_variable->getter = parse_suite("getter definition");
break;
case VariableNode::PROP_SETGET:
consume(GDScriptTokenizer::Token::EQUAL, R"(Expected "=" after "get")");
make_completion_context(COMPLETION_PROPERTY_METHOD, p_variable);
if (consume(GDScriptTokenizer::Token::IDENTIFIER, R"(Expected getter function name after "=".)")) {
p_variable->getter_pointer = parse_identifier();
}
break;
case VariableNode::PROP_NONE:
break; // Unreachable.
}
}
GDScriptParser::ConstantNode *GDScriptParser::parse_constant() {
if (!consume(GDScriptTokenizer::Token::IDENTIFIER, R"(Expected constant name after "const".)")) {
return nullptr;
}
ConstantNode *constant = alloc_node<ConstantNode>();
constant->identifier = parse_identifier();
if (match(GDScriptTokenizer::Token::COLON)) {
if (check((GDScriptTokenizer::Token::EQUAL))) {
// Infer type.
constant->infer_datatype = true;
} else {
// Parse type.
constant->datatype_specifier = parse_type();
}
}
if (consume(GDScriptTokenizer::Token::EQUAL, R"(Expected initializer after constant name.)")) {
// Initializer.
constant->initializer = parse_expression(false);
if (constant->initializer == nullptr) {
push_error(R"(Expected initializer expression for constant.)");
return nullptr;
}
}
end_statement("constant declaration");
return constant;
}
GDScriptParser::ParameterNode *GDScriptParser::parse_parameter() {
if (!consume(GDScriptTokenizer::Token::IDENTIFIER, R"(Expected parameter name.)")) {
return nullptr;
}
ParameterNode *parameter = alloc_node<ParameterNode>();
parameter->identifier = parse_identifier();
if (match(GDScriptTokenizer::Token::COLON)) {
if (check((GDScriptTokenizer::Token::EQUAL))) {
// Infer type.
parameter->infer_datatype = true;
} else {
// Parse type.
make_completion_context(COMPLETION_TYPE_NAME, parameter);
parameter->datatype_specifier = parse_type();
}
}
if (match(GDScriptTokenizer::Token::EQUAL)) {
// Default value.
parameter->default_value = parse_expression(false);
}
return parameter;
}
GDScriptParser::SignalNode *GDScriptParser::parse_signal() {
if (!consume(GDScriptTokenizer::Token::IDENTIFIER, R"(Expected signal name after "signal".)")) {
return nullptr;
}
SignalNode *signal = alloc_node<SignalNode>();
signal->identifier = parse_identifier();
if (match(GDScriptTokenizer::Token::PARENTHESIS_OPEN)) {
do {
if (check(GDScriptTokenizer::Token::PARENTHESIS_CLOSE)) {
// Allow for trailing comma.
break;
}
ParameterNode *parameter = parse_parameter();
if (parameter == nullptr) {
push_error("Expected signal parameter name.");
break;
}
if (parameter->default_value != nullptr) {
push_error(R"(Signal parameters cannot have a default value.)");
}
if (signal->parameters_indices.has(parameter->identifier->name)) {
push_error(vformat(R"(Parameter with name "%s" was already declared for this signal.)", parameter->identifier->name));
} else {
signal->parameters_indices[parameter->identifier->name] = signal->parameters.size();
signal->parameters.push_back(parameter);
}
} while (match(GDScriptTokenizer::Token::COMMA) && !is_at_end());
consume(GDScriptTokenizer::Token::PARENTHESIS_CLOSE, R"*(Expected closing ")" after signal parameters.)*");
}
end_statement("signal declaration");
return signal;
}
GDScriptParser::EnumNode *GDScriptParser::parse_enum() {
EnumNode *enum_node = alloc_node<EnumNode>();
bool named = false;
if (check(GDScriptTokenizer::Token::IDENTIFIER)) {
advance();
enum_node->identifier = parse_identifier();
named = true;
}
push_multiline(true);
consume(GDScriptTokenizer::Token::BRACE_OPEN, vformat(R"(Expected "{" after %s.)", named ? "enum name" : R"("enum")"));
HashMap<StringName, int> elements;
do {
if (check(GDScriptTokenizer::Token::BRACE_CLOSE)) {
break; // Allow trailing comma.
}
if (consume(GDScriptTokenizer::Token::IDENTIFIER, R"(Expected identifer for enum key.)")) {
EnumNode::Value item;
item.identifier = parse_identifier();
item.parent_enum = enum_node;
item.line = previous.start_line;
item.leftmost_column = previous.leftmost_column;
if (elements.has(item.identifier->name)) {
push_error(vformat(R"(Name "%s" was already in this enum (at line %d).)", item.identifier->name, elements[item.identifier->name]), item.identifier);
} else if (!named) {
// TODO: Abstract this recursive member check.
ClassNode *parent = current_class;
while (parent != nullptr) {
if (parent->members_indices.has(item.identifier->name)) {
push_error(vformat(R"(Name "%s" is already used as a class %s.)", item.identifier->name, parent->get_member(item.identifier->name).get_type_name()));
break;
}
parent = parent->outer;
}
}
elements[item.identifier->name] = item.line;
if (match(GDScriptTokenizer::Token::EQUAL)) {
ExpressionNode *value = parse_expression(false);
if (value == nullptr) {
push_error(R"(Expected expression value after "=".)");
}
item.custom_value = value;
}
item.rightmost_column = previous.rightmost_column;
item.index = enum_node->values.size();
enum_node->values.push_back(item);
if (!named) {
// Add as member of current class.
current_class->add_member(item);
}
}
} while (match(GDScriptTokenizer::Token::COMMA));
pop_multiline();
consume(GDScriptTokenizer::Token::BRACE_CLOSE, R"(Expected closing "}" for enum.)");
end_statement("enum");
return enum_node;
}
GDScriptParser::FunctionNode *GDScriptParser::parse_function() {
bool _static = false;
if (previous.type == GDScriptTokenizer::Token::STATIC) {
// TODO: Improve message if user uses "static" with "var" or "const"
if (!consume(GDScriptTokenizer::Token::FUNC, R"(Expected "func" after "static".)")) {
return nullptr;
}
_static = true;
}
FunctionNode *function = alloc_node<FunctionNode>();
make_completion_context(COMPLETION_OVERRIDE_METHOD, function);
if (!consume(GDScriptTokenizer::Token::IDENTIFIER, R"(Expected function name after "func".)")) {
return nullptr;
}
FunctionNode *previous_function = current_function;
current_function = function;
function->identifier = parse_identifier();
function->is_static = _static;
push_multiline(true);
consume(GDScriptTokenizer::Token::PARENTHESIS_OPEN, R"(Expected opening "(" after function name.)");
SuiteNode *body = alloc_node<SuiteNode>();
SuiteNode *previous_suite = current_suite;
current_suite = body;
if (!check(GDScriptTokenizer::Token::PARENTHESIS_CLOSE) && !is_at_end()) {
bool default_used = false;
do {
if (check(GDScriptTokenizer::Token::PARENTHESIS_CLOSE)) {
// Allow for trailing comma.
break;
}
ParameterNode *parameter = parse_parameter();
if (parameter == nullptr) {
break;
}
if (parameter->default_value != nullptr) {
default_used = true;
} else {
if (default_used) {
push_error("Cannot have a mandatory parameters after optional parameters.");
continue;
}
}
if (function->parameters_indices.has(parameter->identifier->name)) {
push_error(vformat(R"(Parameter with name "%s" was already declared for this function.)", parameter->identifier->name));
} else {
function->parameters_indices[parameter->identifier->name] = function->parameters.size();
function->parameters.push_back(parameter);
body->add_local(parameter);
}
} while (match(GDScriptTokenizer::Token::COMMA));
}
pop_multiline();
consume(GDScriptTokenizer::Token::PARENTHESIS_CLOSE, R"*(Expected closing ")" after function parameters.)*");
if (match(GDScriptTokenizer::Token::FORWARD_ARROW)) {
make_completion_context(COMPLETION_TYPE_NAME_OR_VOID, function);
function->return_type = parse_type(true);
if (function->return_type == nullptr) {
push_error(R"(Expected return type or "void" after "->".)");
}
}
// TODO: Improve token consumption so it synchronizes to a statement boundary. This way we can get into the function body with unrecognized tokens.
consume(GDScriptTokenizer::Token::COLON, R"(Expected ":" after function declaration.)");
current_suite = previous_suite;
function->body = parse_suite("function declaration", body);
current_function = previous_function;
return function;
}
GDScriptParser::AnnotationNode *GDScriptParser::parse_annotation(uint32_t p_valid_targets) {
AnnotationNode *annotation = alloc_node<AnnotationNode>();
annotation->name = previous.literal;
make_completion_context(COMPLETION_ANNOTATION, annotation);
bool valid = true;
if (!valid_annotations.has(annotation->name)) {
push_error(vformat(R"(Unrecognized annotation: "%s".)", annotation->name));
valid = false;
}
annotation->info = &valid_annotations[annotation->name];
if (!annotation->applies_to(p_valid_targets)) {
push_error(vformat(R"(Annotation "%s" is not allowed in this level.)", annotation->name));
valid = false;
}
if (match(GDScriptTokenizer::Token::PARENTHESIS_OPEN)) {
// Arguments.
push_completion_call(annotation);
make_completion_context(COMPLETION_ANNOTATION_ARGUMENTS, annotation, 0, true);
if (!check(GDScriptTokenizer::Token::PARENTHESIS_CLOSE) && !is_at_end()) {
int argument_index = 0;
do {
make_completion_context(COMPLETION_ANNOTATION_ARGUMENTS, annotation, argument_index, true);
set_last_completion_call_arg(argument_index++);
ExpressionNode *argument = parse_expression(false);
if (argument == nullptr) {
valid = false;
continue;
}
annotation->arguments.push_back(argument);
} while (match(GDScriptTokenizer::Token::COMMA));
consume(GDScriptTokenizer::Token::PARENTHESIS_CLOSE, R"*(Expected ")" after annotation arguments.)*");
}
pop_completion_call();
}
match(GDScriptTokenizer::Token::NEWLINE); // Newline after annotation is optional.
if (valid) {
valid = validate_annotation_arguments(annotation);
}
return valid ? annotation : nullptr;
}
void GDScriptParser::clear_unused_annotations() {
for (const List<AnnotationNode *>::Element *E = annotation_stack.front(); E != nullptr; E = E->next()) {
AnnotationNode *annotation = E->get();
push_error(vformat(R"(Annotation "%s" does not precedes a valid target, so it will have no effect.)", annotation->name), annotation);
}
annotation_stack.clear();
}
bool GDScriptParser::register_annotation(const MethodInfo &p_info, uint32_t p_target_kinds, AnnotationAction p_apply, int p_optional_arguments, bool p_is_vararg) {
ERR_FAIL_COND_V_MSG(valid_annotations.has(p_info.name), false, vformat(R"(Annotation "%s" already registered.)", p_info.name));
AnnotationInfo new_annotation;
new_annotation.info = p_info;
new_annotation.info.default_arguments.resize(p_optional_arguments);
if (p_is_vararg) {
new_annotation.info.flags |= METHOD_FLAG_VARARG;
}
new_annotation.apply = p_apply;
new_annotation.target_kind = p_target_kinds;
valid_annotations[p_info.name] = new_annotation;
return true;
}
GDScriptParser::SuiteNode *GDScriptParser::parse_suite(const String &p_context, SuiteNode *p_suite) {
SuiteNode *suite = p_suite != nullptr ? p_suite : alloc_node<SuiteNode>();
suite->parent_block = current_suite;
current_suite = suite;
bool multiline = false;
if (check(GDScriptTokenizer::Token::NEWLINE)) {
multiline = true;
}
if (multiline) {
consume(GDScriptTokenizer::Token::NEWLINE, vformat(R"(Expected newline after %s.)", p_context));
if (!consume(GDScriptTokenizer::Token::INDENT, vformat(R"(Expected indented block after %s.)", p_context))) {
current_suite = suite->parent_block;
return suite;
}
}
do {
Node *statement = parse_statement();
if (statement == nullptr) {
continue;
}
suite->statements.push_back(statement);
// Register locals.
switch (statement->type) {
case Node::VARIABLE: {
VariableNode *variable = static_cast<VariableNode *>(statement);
const SuiteNode::Local &local = current_suite->get_local(variable->identifier->name);
if (local.type != SuiteNode::Local::UNDEFINED) {
push_error(vformat(R"(There is already a %s named "%s" declared in this scope.)", local.get_name(), variable->identifier->name));
}
current_suite->add_local(variable);
break;
}
case Node::CONSTANT: {
ConstantNode *constant = static_cast<ConstantNode *>(statement);
const SuiteNode::Local &local = current_suite->get_local(constant->identifier->name);
if (local.type != SuiteNode::Local::UNDEFINED) {
String name;
if (local.type == SuiteNode::Local::CONSTANT) {
name = "constant";
} else {
name = "variable";
}
push_error(vformat(R"(There is already a %s named "%s" declared in this scope.)", name, constant->identifier->name));
}
current_suite->add_local(constant);
break;
}
default:
break;
}
} while (multiline && !check(GDScriptTokenizer::Token::DEDENT) && !is_at_end());
if (multiline) {
consume(GDScriptTokenizer::Token::DEDENT, vformat(R"(Missing unindent at the end of %s.)", p_context));
}
current_suite = suite->parent_block;
return suite;
}
GDScriptParser::Node *GDScriptParser::parse_statement() {
Node *result = nullptr;
#ifdef DEBUG_ENABLED
bool unreachable = current_suite->has_return && !current_suite->has_unreachable_code;
#endif
switch (current.type) {
case GDScriptTokenizer::Token::PASS:
advance();
result = alloc_node<PassNode>();
end_statement(R"("pass")");
break;
case GDScriptTokenizer::Token::VAR:
advance();
result = parse_variable();
break;
case GDScriptTokenizer::Token::CONST:
advance();
result = parse_constant();
break;
case GDScriptTokenizer::Token::IF:
advance();
result = parse_if();
break;
case GDScriptTokenizer::Token::FOR:
advance();
result = parse_for();
break;
case GDScriptTokenizer::Token::WHILE:
advance();
result = parse_while();
break;
case GDScriptTokenizer::Token::MATCH:
advance();
result = parse_match();
break;
case GDScriptTokenizer::Token::BREAK:
advance();
result = parse_break();
break;
case GDScriptTokenizer::Token::CONTINUE:
advance();
result = parse_continue();
break;
case GDScriptTokenizer::Token::RETURN: {
advance();
ReturnNode *n_return = alloc_node<ReturnNode>();
if (!is_statement_end()) {
if (current_function && current_function->identifier->name == GDScriptLanguage::get_singleton()->strings._init) {
push_error(R"(Constructor cannot return a value.)");
}
n_return->return_value = parse_expression(false);
}
result = n_return;
current_suite->has_return = true;
end_statement("return statement");
break;
}
case GDScriptTokenizer::Token::BREAKPOINT:
advance();
result = alloc_node<BreakpointNode>();
end_statement(R"("breakpoint")");
break;
case GDScriptTokenizer::Token::ASSERT:
advance();
result = parse_assert();
break;
case GDScriptTokenizer::Token::ANNOTATION: {
advance();
AnnotationNode *annotation = parse_annotation(AnnotationInfo::STATEMENT);
if (annotation != nullptr) {
annotation_stack.push_back(annotation);
}
break;
}
default: {
// Expression statement.
ExpressionNode *expression = parse_expression(true); // Allow assignment here.
if (expression == nullptr) {
push_error(vformat(R"(Expected statement, found "%s" instead.)", previous.get_name()));
}
end_statement("expression");
result = expression;
#ifdef DEBUG_ENABLED
if (expression != nullptr) {
switch (expression->type) {
case Node::CALL:
case Node::ASSIGNMENT:
case Node::AWAIT:
// Fine.
break;
default:
push_warning(expression, GDScriptWarning::STANDALONE_EXPRESSION);
}
}
#endif
break;
}
}
#ifdef DEBUG_ENABLED
if (unreachable) {
current_suite->has_unreachable_code = true;
push_warning(result, GDScriptWarning::UNREACHABLE_CODE, current_function->identifier->name);
}
#endif
if (panic_mode) {
synchronize();
}
return result;
}
GDScriptParser::AssertNode *GDScriptParser::parse_assert() {
// TODO: Add assert message.
AssertNode *assert = alloc_node<AssertNode>();
consume(GDScriptTokenizer::Token::PARENTHESIS_OPEN, R"(Expected "(" after "assert".)");
assert->condition = parse_expression(false);
if (assert->condition == nullptr) {
push_error("Expected expression to assert.");
return nullptr;
}
if (match(GDScriptTokenizer::Token::COMMA)) {
// Error message.
if (consume(GDScriptTokenizer::Token::LITERAL, R"(Expected error message for assert after ",".)")) {
assert->message = parse_literal();
if (assert->message->value.get_type() != Variant::STRING) {
push_error(R"(Expected string for assert error message.)");
}
} else {
return nullptr;
}
}
consume(GDScriptTokenizer::Token::PARENTHESIS_CLOSE, R"*(Expected ")" after assert expression.)*");
end_statement(R"("assert")");
return assert;
}
GDScriptParser::BreakNode *GDScriptParser::parse_break() {
if (!can_break) {
push_error(R"(Cannot use "break" outside of a loop.)");
}
end_statement(R"("break")");
return alloc_node<BreakNode>();
}
GDScriptParser::ContinueNode *GDScriptParser::parse_continue() {
if (!can_continue) {
push_error(R"(Cannot use "continue" outside of a loop or pattern matching block.)");
}
current_suite->has_continue = true;
end_statement(R"("continue")");
ContinueNode *cont = alloc_node<ContinueNode>();
cont->is_for_match = is_continue_match;
return cont;
}
GDScriptParser::ForNode *GDScriptParser::parse_for() {
ForNode *n_for = alloc_node<ForNode>();
if (consume(GDScriptTokenizer::Token::IDENTIFIER, R"(Expected loop variable name after "for".)")) {
n_for->variable = parse_identifier();
}
consume(GDScriptTokenizer::Token::IN, R"(Expected "in" after "for" variable name.)");
n_for->list = parse_expression(false);
consume(GDScriptTokenizer::Token::COLON, R"(Expected ":" after "for" condition.)");
// Save break/continue state.
bool could_break = can_break;
bool could_continue = can_continue;
bool was_continue_match = is_continue_match;
// Allow break/continue.
can_break = true;
can_continue = true;
is_continue_match = false;
SuiteNode *suite = alloc_node<SuiteNode>();
if (n_for->variable) {
suite->add_local(SuiteNode::Local(n_for->variable));
}
suite->parent_for = n_for;
n_for->loop = parse_suite(R"("for" block)", suite);
// Reset break/continue state.
can_break = could_break;
can_continue = could_continue;
is_continue_match = was_continue_match;
return n_for;
}
GDScriptParser::IfNode *GDScriptParser::parse_if(const String &p_token) {
IfNode *n_if = alloc_node<IfNode>();
n_if->condition = parse_expression(false);
if (n_if->condition == nullptr) {
push_error(vformat(R"(Expected conditional expression after "%s".)", p_token));
}
consume(GDScriptTokenizer::Token::COLON, vformat(R"(Expected ":" after "%s" condition.)", p_token));
n_if->true_block = parse_suite(vformat(R"("%s" block)", p_token));
n_if->true_block->parent_if = n_if;
if (n_if->true_block->has_continue) {
current_suite->has_continue = true;
}
if (match(GDScriptTokenizer::Token::ELIF)) {
IfNode *elif = parse_if("elif");
SuiteNode *else_block = alloc_node<SuiteNode>();
else_block->statements.push_back(elif);
n_if->false_block = else_block;
} else if (match(GDScriptTokenizer::Token::ELSE)) {
consume(GDScriptTokenizer::Token::COLON, R"(Expected ":" after "else".)");
n_if->false_block = parse_suite(R"("else" block)");
}
if (n_if->false_block != nullptr && n_if->false_block->has_return && n_if->true_block->has_return) {
current_suite->has_return = true;
}
if (n_if->false_block != nullptr && n_if->false_block->has_continue) {
current_suite->has_continue = true;
}
return n_if;
}
GDScriptParser::MatchNode *GDScriptParser::parse_match() {
MatchNode *match = alloc_node<MatchNode>();
match->test = parse_expression(false);
if (match->test == nullptr) {
push_error(R"(Expected expression to test after "match".)");
}
consume(GDScriptTokenizer::Token::COLON, R"(Expected ":" after "match" expression.)");
consume(GDScriptTokenizer::Token::NEWLINE, R"(Expected a newline after "match" statement.)");
if (!consume(GDScriptTokenizer::Token::INDENT, R"(Expected an indented block after "match" statement.)")) {
return match;
}
#ifdef DEBUG_ENABLED
bool all_have_return = true;
bool have_wildcard = false;
bool wildcard_has_return = false;
bool have_wildcard_without_continue = false;
#endif
while (!check(GDScriptTokenizer::Token::DEDENT) && !is_at_end()) {
MatchBranchNode *branch = parse_match_branch();
if (branch == nullptr) {
continue;
}
#ifdef DEBUG_ENABLED
if (have_wildcard_without_continue) {
push_warning(branch->patterns[0], GDScriptWarning::UNREACHABLE_PATTERN);
}
if (branch->has_wildcard) {
have_wildcard = true;
if (branch->block->has_return) {
wildcard_has_return = true;
}
if (!branch->block->has_continue) {
have_wildcard_without_continue = true;
}
}
if (!branch->block->has_return) {
all_have_return = false;
}
#endif
match->branches.push_back(branch);
}
consume(GDScriptTokenizer::Token::DEDENT, R"(Expected an indented block after "match" statement.)");
#ifdef DEBUG_ENABLED
if (wildcard_has_return || (all_have_return && have_wildcard)) {
current_suite->has_return = true;
}
#endif
return match;
}
GDScriptParser::MatchBranchNode *GDScriptParser::parse_match_branch() {
MatchBranchNode *branch = alloc_node<MatchBranchNode>();
bool has_bind = false;
do {
PatternNode *pattern = parse_match_pattern();
if (pattern == nullptr) {
continue;
}
if (pattern->pattern_type == PatternNode::PT_BIND) {
has_bind = true;
}
if (branch->patterns.size() > 0 && has_bind) {
push_error(R"(Cannot use a variable bind with multiple patterns.)");
}
if (pattern->pattern_type == PatternNode::PT_REST) {
push_error(R"(Rest pattern can only be used inside array and dictionary patterns.)");
} else if (pattern->pattern_type == PatternNode::PT_BIND || pattern->pattern_type == PatternNode::PT_WILDCARD) {
branch->has_wildcard = true;
}
branch->patterns.push_back(pattern);
} while (match(GDScriptTokenizer::Token::COMMA));
if (branch->patterns.empty()) {
push_error(R"(No pattern found for "match" branch.)");
}
consume(GDScriptTokenizer::Token::COLON, R"(Expected ":" after "match" patterns.)");
// Save continue state.
bool could_continue = can_continue;
bool was_continue_match = is_continue_match;
// Allow continue for match.
can_continue = true;
is_continue_match = true;
SuiteNode *suite = alloc_node<SuiteNode>();
if (branch->patterns.size() > 0) {
List<StringName> binds;
branch->patterns[0]->binds.get_key_list(&binds);
for (List<StringName>::Element *E = binds.front(); E != nullptr; E = E->next()) {
SuiteNode::Local local(branch->patterns[0]->binds[E->get()]);
suite->add_local(local);
}
}
branch->block = parse_suite("match pattern block", suite);
// Restore continue state.
can_continue = could_continue;
is_continue_match = was_continue_match;
return branch;
}
GDScriptParser::PatternNode *GDScriptParser::parse_match_pattern(PatternNode *p_root_pattern) {
PatternNode *pattern = alloc_node<PatternNode>();
switch (current.type) {
case GDScriptTokenizer::Token::LITERAL:
advance();
pattern->pattern_type = PatternNode::PT_LITERAL;
pattern->literal = parse_literal();
if (pattern->literal == nullptr) {
// Error happened.
return nullptr;
}
break;
case GDScriptTokenizer::Token::VAR: {
// Bind.
advance();
if (!consume(GDScriptTokenizer::Token::IDENTIFIER, R"(Expected bind name after "var".)")) {
return nullptr;
}
pattern->pattern_type = PatternNode::PT_BIND;
pattern->bind = parse_identifier();
PatternNode *root_pattern = p_root_pattern == nullptr ? pattern : p_root_pattern;
if (p_root_pattern != nullptr) {
if (p_root_pattern->has_bind(pattern->bind->name)) {
push_error(vformat(R"(Bind variable name "%s" was already used in this pattern.)", pattern->bind->name));
return nullptr;
}
}
if (current_suite->has_local(pattern->bind->name)) {
push_error(vformat(R"(There's already a %s named "%s" in this scope.)", current_suite->get_local(pattern->bind->name).get_name(), pattern->bind->name));
return nullptr;
}
root_pattern->binds[pattern->bind->name] = pattern->bind;
} break;
case GDScriptTokenizer::Token::UNDERSCORE:
// Wildcard.
advance();
pattern->pattern_type = PatternNode::PT_WILDCARD;
break;
case GDScriptTokenizer::Token::PERIOD_PERIOD:
// Rest.
advance();
pattern->pattern_type = PatternNode::PT_REST;
break;
case GDScriptTokenizer::Token::BRACKET_OPEN: {
// Array.
advance();
pattern->pattern_type = PatternNode::PT_ARRAY;
if (!check(GDScriptTokenizer::Token::BRACKET_CLOSE)) {
do {
PatternNode *sub_pattern = parse_match_pattern(p_root_pattern != nullptr ? p_root_pattern : pattern);
if (sub_pattern == nullptr) {
continue;
}
if (pattern->rest_used) {
push_error(R"(The ".." pattern must be the last element in the pattern array.)");
} else if (sub_pattern->pattern_type == PatternNode::PT_REST) {
pattern->rest_used = true;
}
pattern->array.push_back(sub_pattern);
} while (match(GDScriptTokenizer::Token::COMMA));
}
consume(GDScriptTokenizer::Token::BRACKET_CLOSE, R"(Expected "]" to close the array pattern.)");
break;
}
case GDScriptTokenizer::Token::BRACE_OPEN: {
// Dictionary.
advance();
pattern->pattern_type = PatternNode::PT_DICTIONARY;
if (!check(GDScriptTokenizer::Token::BRACE_CLOSE) && !is_at_end()) {
do {
if (match(GDScriptTokenizer::Token::PERIOD_PERIOD)) {
// Rest.
if (pattern->rest_used) {
push_error(R"(The ".." pattern must be the last element in the pattern dictionary.)");
} else {
PatternNode *sub_pattern = alloc_node<PatternNode>();
sub_pattern->pattern_type = PatternNode::PT_REST;
pattern->dictionary.push_back({ nullptr, sub_pattern });
pattern->rest_used = true;
}
} else {
ExpressionNode *key = parse_expression(false);
if (key == nullptr) {
push_error(R"(Expected expression as key for dictionary pattern.)");
}
if (match(GDScriptTokenizer::Token::COLON)) {
// Value pattern.
PatternNode *sub_pattern = parse_match_pattern(p_root_pattern != nullptr ? p_root_pattern : pattern);
if (sub_pattern == nullptr) {
continue;
}
if (pattern->rest_used) {
push_error(R"(The ".." pattern must be the last element in the pattern dictionary.)");
} else if (sub_pattern->pattern_type == PatternNode::PT_REST) {
push_error(R"(The ".." pattern cannot be used as a value.)");
} else {
pattern->dictionary.push_back({ key, sub_pattern });
}
} else {
// Key match only.
pattern->dictionary.push_back({ key, nullptr });
}
}
} while (match(GDScriptTokenizer::Token::COMMA));
}
consume(GDScriptTokenizer::Token::BRACE_CLOSE, R"(Expected "}" to close the dictionary pattern.)");
break;
}
default: {
// Expression.
ExpressionNode *expression = parse_expression(false);
if (expression == nullptr) {
push_error(R"(Expected expression for match pattern.)");
} else {
pattern->pattern_type = PatternNode::PT_EXPRESSION;
pattern->expression = expression;
}
break;
}
}
return pattern;
}
bool GDScriptParser::PatternNode::has_bind(const StringName &p_name) {
return binds.has(p_name);
}
GDScriptParser::IdentifierNode *GDScriptParser::PatternNode::get_bind(const StringName &p_name) {
return binds[p_name];
}
GDScriptParser::WhileNode *GDScriptParser::parse_while() {
WhileNode *n_while = alloc_node<WhileNode>();
n_while->condition = parse_expression(false);
if (n_while->condition == nullptr) {
push_error(R"(Expected conditional expression after "while".)");
}
consume(GDScriptTokenizer::Token::COLON, R"(Expected ":" after "while" condition.)");
// Save break/continue state.
bool could_break = can_break;
bool could_continue = can_continue;
bool was_continue_match = is_continue_match;
// Allow break/continue.
can_break = true;
can_continue = true;
is_continue_match = false;
n_while->loop = parse_suite(R"("while" block)");
// Reset break/continue state.
can_break = could_break;
can_continue = could_continue;
is_continue_match = was_continue_match;
return n_while;
}
GDScriptParser::ExpressionNode *GDScriptParser::parse_precedence(Precedence p_precedence, bool p_can_assign, bool p_stop_on_assign) {
// Switch multiline mode on for grouping tokens.
// Do this early to avoid the tokenizer generating whitespace tokens.
switch (current.type) {
case GDScriptTokenizer::Token::PARENTHESIS_OPEN:
case GDScriptTokenizer::Token::BRACE_OPEN:
case GDScriptTokenizer::Token::BRACKET_OPEN:
push_multiline(true);
break;
default:
break; // Nothing to do.
}
// Completion can appear whenever an expression is expected.
make_completion_context(COMPLETION_IDENTIFIER, nullptr);
GDScriptTokenizer::Token token = advance();
ParseFunction prefix_rule = get_rule(token.type)->prefix;
if (prefix_rule == nullptr) {
// Expected expression. Let the caller give the proper error message.
return nullptr;
}
ExpressionNode *previous_operand = (this->*prefix_rule)(nullptr, p_can_assign);
while (p_precedence <= get_rule(current.type)->precedence) {
if (p_stop_on_assign && current.type == GDScriptTokenizer::Token::EQUAL) {
return previous_operand;
}
// Also switch multiline mode on here for infix operators.
switch (current.type) {
// case GDScriptTokenizer::Token::BRACE_OPEN: // Not an infix operator.
case GDScriptTokenizer::Token::PARENTHESIS_OPEN:
case GDScriptTokenizer::Token::BRACKET_OPEN:
push_multiline(true);
break;
default:
break; // Nothing to do.
}
token = advance();
ParseFunction infix_rule = get_rule(token.type)->infix;
previous_operand = (this->*infix_rule)(previous_operand, p_can_assign);
}
return previous_operand;
}
GDScriptParser::ExpressionNode *GDScriptParser::parse_expression(bool p_can_assign, bool p_stop_on_assign) {
return parse_precedence(PREC_ASSIGNMENT, p_can_assign, p_stop_on_assign);
}
GDScriptParser::IdentifierNode *GDScriptParser::parse_identifier() {
return static_cast<IdentifierNode *>(parse_identifier(nullptr, false));
}
GDScriptParser::ExpressionNode *GDScriptParser::parse_identifier(ExpressionNode *p_previous_operand, bool p_can_assign) {
if (!previous.is_identifier()) {
ERR_FAIL_V_MSG(nullptr, "Parser bug: parsing literal node without literal token.");
}
IdentifierNode *identifier = alloc_node<IdentifierNode>();
identifier->name = previous.get_identifier();
if (current_suite != nullptr && current_suite->has_local(identifier->name)) {
const SuiteNode::Local &declaration = current_suite->get_local(identifier->name);
switch (declaration.type) {
case SuiteNode::Local::CONSTANT:
identifier->source = IdentifierNode::LOCAL_CONSTANT;
identifier->constant_source = declaration.constant;
declaration.constant->usages++;
break;
case SuiteNode::Local::VARIABLE:
identifier->source = IdentifierNode::LOCAL_VARIABLE;
identifier->variable_source = declaration.variable;
declaration.variable->usages++;
break;
case SuiteNode::Local::PARAMETER:
identifier->source = IdentifierNode::FUNCTION_PARAMETER;
identifier->parameter_source = declaration.parameter;
declaration.parameter->usages++;
break;
case SuiteNode::Local::FOR_VARIABLE:
identifier->source = IdentifierNode::LOCAL_ITERATOR;
identifier->bind_source = declaration.bind;
declaration.bind->usages++;
break;
case SuiteNode::Local::PATTERN_BIND:
identifier->source = IdentifierNode::LOCAL_BIND;
identifier->bind_source = declaration.bind;
declaration.bind->usages++;
break;
case SuiteNode::Local::UNDEFINED:
ERR_FAIL_V_MSG(nullptr, "Undefined local found.");
}
}
return identifier;
}
GDScriptParser::LiteralNode *GDScriptParser::parse_literal() {
return static_cast<LiteralNode *>(parse_literal(nullptr, false));
}
GDScriptParser::ExpressionNode *GDScriptParser::parse_literal(ExpressionNode *p_previous_operand, bool p_can_assign) {
if (previous.type != GDScriptTokenizer::Token::LITERAL) {
push_error("Parser bug: parsing literal node without literal token.");
ERR_FAIL_V_MSG(nullptr, "Parser bug: parsing literal node without literal token.");
}
LiteralNode *literal = alloc_node<LiteralNode>();
literal->value = previous.literal;
return literal;
}
GDScriptParser::ExpressionNode *GDScriptParser::parse_self(ExpressionNode *p_previous_operand, bool p_can_assign) {
if (current_function && current_function->is_static) {
push_error(R"(Cannot use "self" inside a static function.)");
}
SelfNode *self = alloc_node<SelfNode>();
self->current_class = current_class;
return self;
}
GDScriptParser::ExpressionNode *GDScriptParser::parse_builtin_constant(ExpressionNode *p_previous_operand, bool p_can_assign) {
GDScriptTokenizer::Token::Type op_type = previous.type;
LiteralNode *constant = alloc_node<LiteralNode>();
switch (op_type) {
case GDScriptTokenizer::Token::CONST_PI:
constant->value = Math_PI;
break;
case GDScriptTokenizer::Token::CONST_TAU:
constant->value = Math_TAU;
break;
case GDScriptTokenizer::Token::CONST_INF:
constant->value = Math_INF;
break;
case GDScriptTokenizer::Token::CONST_NAN:
constant->value = Math_NAN;
break;
default:
return nullptr; // Unreachable.
}
return constant;
}
GDScriptParser::ExpressionNode *GDScriptParser::parse_unary_operator(ExpressionNode *p_previous_operand, bool p_can_assign) {
GDScriptTokenizer::Token::Type op_type = previous.type;
UnaryOpNode *operation = alloc_node<UnaryOpNode>();
switch (op_type) {
case GDScriptTokenizer::Token::MINUS:
operation->operation = UnaryOpNode::OP_NEGATIVE;
operation->variant_op = Variant::OP_NEGATE;
operation->operand = parse_precedence(PREC_SIGN, false);
break;
case GDScriptTokenizer::Token::PLUS:
operation->operation = UnaryOpNode::OP_POSITIVE;
operation->variant_op = Variant::OP_POSITIVE;
operation->operand = parse_precedence(PREC_SIGN, false);
break;
case GDScriptTokenizer::Token::TILDE:
operation->operation = UnaryOpNode::OP_COMPLEMENT;
operation->variant_op = Variant::OP_BIT_NEGATE;
operation->operand = parse_precedence(PREC_BIT_NOT, false);
break;
case GDScriptTokenizer::Token::NOT:
case GDScriptTokenizer::Token::BANG:
operation->operation = UnaryOpNode::OP_LOGIC_NOT;
operation->variant_op = Variant::OP_NOT;
operation->operand = parse_precedence(PREC_LOGIC_NOT, false);
break;
default:
return nullptr; // Unreachable.
}
return operation;
}
GDScriptParser::ExpressionNode *GDScriptParser::parse_binary_operator(ExpressionNode *p_previous_operand, bool p_can_assign) {
GDScriptTokenizer::Token op = previous;
BinaryOpNode *operation = alloc_node<BinaryOpNode>();
Precedence precedence = (Precedence)(get_rule(op.type)->precedence + 1);
operation->left_operand = p_previous_operand;
operation->right_operand = parse_precedence(precedence, false);
if (operation->right_operand == nullptr) {
push_error(vformat(R"(Expected expression after "%s" operator.")", op.get_name()));
}
// TODO: Also for unary, ternary, and assignment.
switch (op.type) {
case GDScriptTokenizer::Token::PLUS:
operation->operation = BinaryOpNode::OP_ADDITION;
operation->variant_op = Variant::OP_ADD;
break;
case GDScriptTokenizer::Token::MINUS:
operation->operation = BinaryOpNode::OP_SUBTRACTION;
operation->variant_op = Variant::OP_SUBTRACT;
break;
case GDScriptTokenizer::Token::STAR:
operation->operation = BinaryOpNode::OP_MULTIPLICATION;
operation->variant_op = Variant::OP_MULTIPLY;
break;
case GDScriptTokenizer::Token::SLASH:
operation->operation = BinaryOpNode::OP_DIVISION;
operation->variant_op = Variant::OP_DIVIDE;
break;
case GDScriptTokenizer::Token::PERCENT:
operation->operation = BinaryOpNode::OP_MODULO;
operation->variant_op = Variant::OP_MODULE;
break;
case GDScriptTokenizer::Token::LESS_LESS:
operation->operation = BinaryOpNode::OP_BIT_LEFT_SHIFT;
operation->variant_op = Variant::OP_SHIFT_LEFT;
break;
case GDScriptTokenizer::Token::GREATER_GREATER:
operation->operation = BinaryOpNode::OP_BIT_RIGHT_SHIFT;
operation->variant_op = Variant::OP_SHIFT_RIGHT;
break;
case GDScriptTokenizer::Token::AMPERSAND:
operation->operation = BinaryOpNode::OP_BIT_AND;
operation->variant_op = Variant::OP_BIT_AND;
break;
case GDScriptTokenizer::Token::PIPE:
operation->operation = BinaryOpNode::OP_BIT_OR;
operation->variant_op = Variant::OP_BIT_OR;
break;
case GDScriptTokenizer::Token::CARET:
operation->operation = BinaryOpNode::OP_BIT_XOR;
operation->variant_op = Variant::OP_BIT_XOR;
break;
case GDScriptTokenizer::Token::AND:
case GDScriptTokenizer::Token::AMPERSAND_AMPERSAND:
operation->operation = BinaryOpNode::OP_LOGIC_AND;
operation->variant_op = Variant::OP_AND;
break;
case GDScriptTokenizer::Token::OR:
case GDScriptTokenizer::Token::PIPE_PIPE:
operation->operation = BinaryOpNode::OP_LOGIC_OR;
operation->variant_op = Variant::OP_OR;
break;
case GDScriptTokenizer::Token::IS:
operation->operation = BinaryOpNode::OP_TYPE_TEST;
break;
case GDScriptTokenizer::Token::IN:
operation->operation = BinaryOpNode::OP_CONTENT_TEST;
operation->variant_op = Variant::OP_IN;
break;
case GDScriptTokenizer::Token::EQUAL_EQUAL:
operation->operation = BinaryOpNode::OP_COMP_EQUAL;
operation->variant_op = Variant::OP_EQUAL;
break;
case GDScriptTokenizer::Token::BANG_EQUAL:
operation->operation = BinaryOpNode::OP_COMP_NOT_EQUAL;
operation->variant_op = Variant::OP_NOT_EQUAL;
break;
case GDScriptTokenizer::Token::LESS:
operation->operation = BinaryOpNode::OP_COMP_LESS;
operation->variant_op = Variant::OP_LESS;
break;
case GDScriptTokenizer::Token::LESS_EQUAL:
operation->operation = BinaryOpNode::OP_COMP_LESS_EQUAL;
operation->variant_op = Variant::OP_LESS_EQUAL;
break;
case GDScriptTokenizer::Token::GREATER:
operation->operation = BinaryOpNode::OP_COMP_GREATER;
operation->variant_op = Variant::OP_GREATER;
break;
case GDScriptTokenizer::Token::GREATER_EQUAL:
operation->operation = BinaryOpNode::OP_COMP_GREATER_EQUAL;
operation->variant_op = Variant::OP_GREATER_EQUAL;
break;
default:
return nullptr; // Unreachable.
}
return operation;
}
GDScriptParser::ExpressionNode *GDScriptParser::parse_ternary_operator(ExpressionNode *p_previous_operand, bool p_can_assign) {
// Only one ternary operation exists, so no abstraction here.
TernaryOpNode *operation = alloc_node<TernaryOpNode>();
operation->true_expr = p_previous_operand;
operation->condition = parse_precedence(PREC_TERNARY, false);
if (operation->condition == nullptr) {
push_error(R"(Expected expression as ternary condition after "if".)");
}
consume(GDScriptTokenizer::Token::ELSE, R"(Expected "else" after ternary operator condition.)");
operation->false_expr = parse_precedence(PREC_TERNARY, false);
return operation;
}
GDScriptParser::ExpressionNode *GDScriptParser::parse_assignment(ExpressionNode *p_previous_operand, bool p_can_assign) {
if (!p_can_assign) {
push_error("Assignment is not allowed inside an expression.");
return parse_expression(false); // Return the following expression.
}
#ifdef DEBUG_ENABLED
VariableNode *source_variable = nullptr;
#endif
switch (p_previous_operand->type) {
case Node::IDENTIFIER: {
#ifdef DEBUG_ENABLED
// Get source to store assignment count.
// Also remove one usage since assignment isn't usage.
IdentifierNode *id = static_cast<IdentifierNode *>(p_previous_operand);
switch (id->source) {
case IdentifierNode::LOCAL_VARIABLE:
source_variable = id->variable_source;
id->variable_source->usages--;
break;
case IdentifierNode::LOCAL_CONSTANT:
id->constant_source->usages--;
break;
case IdentifierNode::FUNCTION_PARAMETER:
id->parameter_source->usages--;
break;
case IdentifierNode::LOCAL_ITERATOR:
case IdentifierNode::LOCAL_BIND:
id->bind_source->usages--;
break;
default:
break;
}
#endif
} break;
case Node::SUBSCRIPT:
// Okay.
break;
default:
push_error(R"(Only identifier, attribute access, and subscription access can be used as assignment target.)");
return parse_expression(false); // Return the following expression.
}
AssignmentNode *assignment = alloc_node<AssignmentNode>();
make_completion_context(COMPLETION_ASSIGN, assignment);
#ifdef DEBUG_ENABLED
bool has_operator = true;
#endif
switch (previous.type) {
case GDScriptTokenizer::Token::EQUAL:
assignment->operation = AssignmentNode::OP_NONE;
assignment->variant_op = Variant::OP_MAX;
#ifdef DEBUG_ENABLED
has_operator = false;
#endif
break;
case GDScriptTokenizer::Token::PLUS_EQUAL:
assignment->operation = AssignmentNode::OP_ADDITION;
assignment->variant_op = Variant::OP_ADD;
break;
case GDScriptTokenizer::Token::MINUS_EQUAL:
assignment->operation = AssignmentNode::OP_SUBTRACTION;
assignment->variant_op = Variant::OP_SUBTRACT;
break;
case GDScriptTokenizer::Token::STAR_EQUAL:
assignment->operation = AssignmentNode::OP_MULTIPLICATION;
assignment->variant_op = Variant::OP_MULTIPLY;
break;
case GDScriptTokenizer::Token::SLASH_EQUAL:
assignment->operation = AssignmentNode::OP_DIVISION;
assignment->variant_op = Variant::OP_DIVIDE;
break;
case GDScriptTokenizer::Token::PERCENT_EQUAL:
assignment->operation = AssignmentNode::OP_MODULO;
assignment->variant_op = Variant::OP_MODULE;
break;
case GDScriptTokenizer::Token::LESS_LESS_EQUAL:
assignment->operation = AssignmentNode::OP_BIT_SHIFT_LEFT;
assignment->variant_op = Variant::OP_SHIFT_LEFT;
break;
case GDScriptTokenizer::Token::GREATER_GREATER_EQUAL:
assignment->operation = AssignmentNode::OP_BIT_SHIFT_RIGHT;
assignment->variant_op = Variant::OP_SHIFT_RIGHT;
break;
case GDScriptTokenizer::Token::AMPERSAND_EQUAL:
assignment->operation = AssignmentNode::OP_BIT_AND;
assignment->variant_op = Variant::OP_BIT_AND;
break;
case GDScriptTokenizer::Token::PIPE_EQUAL:
assignment->operation = AssignmentNode::OP_BIT_OR;
assignment->variant_op = Variant::OP_BIT_OR;
break;
case GDScriptTokenizer::Token::CARET_EQUAL:
assignment->operation = AssignmentNode::OP_BIT_XOR;
assignment->variant_op = Variant::OP_BIT_XOR;
break;
default:
break; // Unreachable.
}
assignment->assignee = p_previous_operand;
assignment->assigned_value = parse_expression(false);
#ifdef DEBUG_ENABLED
if (has_operator && source_variable != nullptr && source_variable->assignments == 0) {
push_warning(assignment, GDScriptWarning::UNASSIGNED_VARIABLE_OP_ASSIGN, source_variable->identifier->name);
}
#endif
return assignment;
}
GDScriptParser::ExpressionNode *GDScriptParser::parse_await(ExpressionNode *p_previous_operand, bool p_can_assign) {
AwaitNode *await = alloc_node<AwaitNode>();
await->to_await = parse_precedence(PREC_AWAIT, false);
current_function->is_coroutine = true;
return await;
}
GDScriptParser::ExpressionNode *GDScriptParser::parse_array(ExpressionNode *p_previous_operand, bool p_can_assign) {
ArrayNode *array = alloc_node<ArrayNode>();
if (!check(GDScriptTokenizer::Token::BRACKET_CLOSE)) {
do {
if (check(GDScriptTokenizer::Token::BRACKET_CLOSE)) {
// Allow for trailing comma.
break;
}
ExpressionNode *element = parse_expression(false);
if (element == nullptr) {
push_error(R"(Expected expression as array element.)");
} else {
array->elements.push_back(element);
}
} while (match(GDScriptTokenizer::Token::COMMA) && !is_at_end());
}
pop_multiline();
consume(GDScriptTokenizer::Token::BRACKET_CLOSE, R"(Expected closing "]" after array elements.)");
return array;
}
GDScriptParser::ExpressionNode *GDScriptParser::parse_dictionary(ExpressionNode *p_previous_operand, bool p_can_assign) {
DictionaryNode *dictionary = alloc_node<DictionaryNode>();
bool decided_style = false;
if (!check(GDScriptTokenizer::Token::BRACE_CLOSE)) {
do {
if (check(GDScriptTokenizer::Token::BRACE_CLOSE)) {
// Allow for trailing comma.
break;
}
// Key.
ExpressionNode *key = parse_expression(false, true); // Stop on "=" so we can check for Lua table style.
if (key == nullptr) {
push_error(R"(Expected expression as dictionary key.)");
}
if (!decided_style) {
switch (current.type) {
case GDScriptTokenizer::Token::COLON:
dictionary->style = DictionaryNode::PYTHON_DICT;
break;
case GDScriptTokenizer::Token::EQUAL:
dictionary->style = DictionaryNode::LUA_TABLE;
break;
default:
push_error(R"(Expected ":" or "=" after dictionary key.)");
break;
}
decided_style = true;
}
switch (dictionary->style) {
case DictionaryNode::LUA_TABLE:
if (key != nullptr && key->type != Node::IDENTIFIER) {
push_error("Expected identifier as dictionary key.");
}
if (!match(GDScriptTokenizer::Token::EQUAL)) {
if (match(GDScriptTokenizer::Token::COLON)) {
push_error(R"(Expected "=" after dictionary key. Mixing dictionary styles is not allowed.)");
advance(); // Consume wrong separator anyway.
} else {
push_error(R"(Expected "=" after dictionary key.)");
}
}
break;
case DictionaryNode::PYTHON_DICT:
if (!match(GDScriptTokenizer::Token::COLON)) {
if (match(GDScriptTokenizer::Token::EQUAL)) {
push_error(R"(Expected ":" after dictionary key. Mixing dictionary styles is not allowed.)");
advance(); // Consume wrong separator anyway.
} else {
push_error(R"(Expected ":" after dictionary key.)");
}
}
break;
}
// Value.
ExpressionNode *value = parse_expression(false);
if (value == nullptr) {
push_error(R"(Expected expression as dictionary value.)");
}
if (key != nullptr && value != nullptr) {
dictionary->elements.push_back({ key, value });
}
} while (match(GDScriptTokenizer::Token::COMMA) && !is_at_end());
}
pop_multiline();
consume(GDScriptTokenizer::Token::BRACE_CLOSE, R"(Expected closing "}" after dictionary elements.)");
return dictionary;
}
GDScriptParser::ExpressionNode *GDScriptParser::parse_grouping(ExpressionNode *p_previous_operand, bool p_can_assign) {
ExpressionNode *grouped = parse_expression(false);
pop_multiline();
if (grouped == nullptr) {
push_error(R"(Expected grouping expression.)");
} else {
consume(GDScriptTokenizer::Token::PARENTHESIS_CLOSE, R"*(Expected closing ")" after grouping expression.)*");
}
return grouped;
}
GDScriptParser::ExpressionNode *GDScriptParser::parse_attribute(ExpressionNode *p_previous_operand, bool p_can_assign) {
SubscriptNode *attribute = alloc_node<SubscriptNode>();
if (for_completion) {
bool is_builtin = false;
if (p_previous_operand->type == Node::IDENTIFIER) {
const IdentifierNode *id = static_cast<const IdentifierNode *>(p_previous_operand);
Variant::Type builtin_type = get_builtin_type(id->name);
if (builtin_type < Variant::VARIANT_MAX) {
make_completion_context(COMPLETION_BUILT_IN_TYPE_CONSTANT, builtin_type, true);
is_builtin = true;
}
}
if (!is_builtin) {
make_completion_context(COMPLETION_ATTRIBUTE, attribute, -1, true);
}
}
attribute->is_attribute = true;
attribute->base = p_previous_operand;
if (!consume(GDScriptTokenizer::Token::IDENTIFIER, R"(Expected identifier after "." for attribute access.)")) {
return attribute;
}
attribute->attribute = parse_identifier();
return attribute;
}
GDScriptParser::ExpressionNode *GDScriptParser::parse_subscript(ExpressionNode *p_previous_operand, bool p_can_assign) {
SubscriptNode *subscript = alloc_node<SubscriptNode>();
make_completion_context(COMPLETION_SUBSCRIPT, subscript);
subscript->base = p_previous_operand;
subscript->index = parse_expression(false);
pop_multiline();
consume(GDScriptTokenizer::Token::BRACKET_CLOSE, R"(Expected "]" after subscription index.)");
return subscript;
}
GDScriptParser::ExpressionNode *GDScriptParser::parse_cast(ExpressionNode *p_previous_operand, bool p_can_assign) {
CastNode *cast = alloc_node<CastNode>();
cast->operand = p_previous_operand;
cast->cast_type = parse_type();
if (cast->cast_type == nullptr) {
push_error(R"(Expected type specifier after "as".)");
return p_previous_operand;
}
return cast;
}
GDScriptParser::ExpressionNode *GDScriptParser::parse_call(ExpressionNode *p_previous_operand, bool p_can_assign) {
CallNode *call = alloc_node<CallNode>();
if (previous.type == GDScriptTokenizer::Token::SUPER) {
// Super call.
call->is_super = true;
push_multiline(true);
if (match(GDScriptTokenizer::Token::PARENTHESIS_OPEN)) {
// Implicit call to the parent method of the same name.
if (current_function == nullptr) {
push_error(R"(Cannot use implicit "super" call outside of a function.)");
pop_multiline();
return nullptr;
}
call->function_name = current_function->identifier->name;
} else {
consume(GDScriptTokenizer::Token::PERIOD, R"(Expected "." or "(" after "super".)");
make_completion_context(COMPLETION_SUPER_METHOD, call, true);
if (!consume(GDScriptTokenizer::Token::IDENTIFIER, R"(Expected function name after ".".)")) {
pop_multiline();
return nullptr;
}
IdentifierNode *identifier = parse_identifier();
call->callee = identifier;
call->function_name = identifier->name;
consume(GDScriptTokenizer::Token::PARENTHESIS_OPEN, R"(Expected "(" after function name.)");
}
} else {
call->callee = p_previous_operand;
if (call->callee == nullptr) {
push_error(R"*(Cannot call on an expression. Use ".call()" if it's a Callable.)*");
} else if (call->callee->type == Node::IDENTIFIER) {
call->function_name = static_cast<IdentifierNode *>(call->callee)->name;
make_completion_context(COMPLETION_METHOD, call->callee);
} else if (call->callee->type == Node::SUBSCRIPT) {
SubscriptNode *attribute = static_cast<SubscriptNode *>(call->callee);
if (attribute->is_attribute) {
if (attribute->attribute) {
call->function_name = attribute->attribute->name;
}
make_completion_context(COMPLETION_ATTRIBUTE_METHOD, call->callee);
} else {
// TODO: The analyzer can see if this is actually a Callable and give better error message.
push_error(R"*(Cannot call on an expression. Use ".call()" if it's a Callable.)*");
}
} else {
push_error(R"*(Cannot call on an expression. Use ".call()" if it's a Callable.)*");
}
}
if (!check(GDScriptTokenizer::Token::PARENTHESIS_CLOSE)) {
// Arguments.
push_completion_call(call);
make_completion_context(COMPLETION_CALL_ARGUMENTS, call, 0, true);
int argument_index = 0;
do {
make_completion_context(COMPLETION_CALL_ARGUMENTS, call, argument_index++, true);
if (check(GDScriptTokenizer::Token::PARENTHESIS_CLOSE)) {
// Allow for trailing comma.
break;
}
ExpressionNode *argument = parse_expression(false);
if (argument == nullptr) {
push_error(R"(Expected expression as the function argument.)");
} else {
call->arguments.push_back(argument);
}
} while (match(GDScriptTokenizer::Token::COMMA));
pop_completion_call();
}
pop_multiline();
consume(GDScriptTokenizer::Token::PARENTHESIS_CLOSE, R"*(Expected closing ")" after call arguments.)*");
return call;
}
GDScriptParser::ExpressionNode *GDScriptParser::parse_get_node(ExpressionNode *p_previous_operand, bool p_can_assign) {
if (match(GDScriptTokenizer::Token::LITERAL)) {
if (previous.literal.get_type() != Variant::STRING) {
push_error(R"(Expect node path as string or identifer after "$".)");
return nullptr;
}
GetNodeNode *get_node = alloc_node<GetNodeNode>();
make_completion_context(COMPLETION_GET_NODE, get_node);
get_node->string = parse_literal();
return get_node;
} else if (current.is_node_name()) {
GetNodeNode *get_node = alloc_node<GetNodeNode>();
int chain_position = 0;
do {
make_completion_context(COMPLETION_GET_NODE, get_node, chain_position++);
if (!current.is_node_name()) {
push_error(R"(Expect node path after "/".)");
return nullptr;
}
advance();
IdentifierNode *identifier = alloc_node<IdentifierNode>();
identifier->name = previous.get_identifier();
get_node->chain.push_back(identifier);
} while (match(GDScriptTokenizer::Token::SLASH));
return get_node;
} else {
push_error(R"(Expect node path as string or identifer after "$".)");
return nullptr;
}
}
GDScriptParser::ExpressionNode *GDScriptParser::parse_preload(ExpressionNode *p_previous_operand, bool p_can_assign) {
PreloadNode *preload = alloc_node<PreloadNode>();
preload->resolved_path = "<missing path>";
push_multiline(true);
consume(GDScriptTokenizer::Token::PARENTHESIS_OPEN, R"(Expected "(" after "preload".)");
make_completion_context(COMPLETION_RESOURCE_PATH, preload);
push_completion_call(preload);
preload->path = parse_expression(false);
if (preload->path == nullptr) {
push_error(R"(Expected resource path after "(".)");
}
pop_completion_call();
pop_multiline();
consume(GDScriptTokenizer::Token::PARENTHESIS_CLOSE, R"*(Expected ")" after preload path.)*");
return preload;
}
GDScriptParser::ExpressionNode *GDScriptParser::parse_invalid_token(ExpressionNode *p_previous_operand, bool p_can_assign) {
// Just for better error messages.
GDScriptTokenizer::Token::Type invalid = previous.type;
switch (invalid) {
case GDScriptTokenizer::Token::QUESTION_MARK:
push_error(R"(Unexpected "?" in source. If you want a ternary operator, use "truthy_value if true_condition else falsy_value".)");
break;
default:
return nullptr; // Unreachable.
}
// Return the previous expression.
return p_previous_operand;
}
GDScriptParser::TypeNode *GDScriptParser::parse_type(bool p_allow_void) {
TypeNode *type = alloc_node<TypeNode>();
make_completion_context(p_allow_void ? COMPLETION_TYPE_NAME_OR_VOID : COMPLETION_TYPE_NAME, type);
if (!match(GDScriptTokenizer::Token::IDENTIFIER)) {
if (match(GDScriptTokenizer::Token::VOID)) {
if (p_allow_void) {
TypeNode *void_type = alloc_node<TypeNode>();
return void_type;
} else {
push_error(R"("void" is only allowed for a function return type.)");
}
}
// Leave error message to the caller who knows the context.
return nullptr;
}
IdentifierNode *type_element = parse_identifier();
type->type_chain.push_back(type_element);
int chain_index = 1;
while (match(GDScriptTokenizer::Token::PERIOD)) {
make_completion_context(COMPLETION_TYPE_ATTRIBUTE, type, chain_index++);
if (consume(GDScriptTokenizer::Token::IDENTIFIER, R"(Expected inner type name after ".".)")) {
type_element = parse_identifier();
type->type_chain.push_back(type_element);
}
}
return type;
}
GDScriptParser::ParseRule *GDScriptParser::get_rule(GDScriptTokenizer::Token::Type p_token_type) {
// Function table for expression parsing.
// clang-format destroys the alignment here, so turn off for the table.
/* clang-format off */
static ParseRule rules[] = {
// PREFIX INFIX PRECEDENCE (for infix)
{ nullptr, nullptr, PREC_NONE }, // EMPTY,
// Basic
{ nullptr, nullptr, PREC_NONE }, // ANNOTATION,
{ &GDScriptParser::parse_identifier, nullptr, PREC_NONE }, // IDENTIFIER,
{ &GDScriptParser::parse_literal, nullptr, PREC_NONE }, // LITERAL,
// Comparison
{ nullptr, &GDScriptParser::parse_binary_operator, PREC_COMPARISON }, // LESS,
{ nullptr, &GDScriptParser::parse_binary_operator, PREC_COMPARISON }, // LESS_EQUAL,
{ nullptr, &GDScriptParser::parse_binary_operator, PREC_COMPARISON }, // GREATER,
{ nullptr, &GDScriptParser::parse_binary_operator, PREC_COMPARISON }, // GREATER_EQUAL,
{ nullptr, &GDScriptParser::parse_binary_operator, PREC_COMPARISON }, // EQUAL_EQUAL,
{ nullptr, &GDScriptParser::parse_binary_operator, PREC_COMPARISON }, // BANG_EQUAL,
// Logical
{ nullptr, &GDScriptParser::parse_binary_operator, PREC_LOGIC_AND }, // AND,
{ nullptr, &GDScriptParser::parse_binary_operator, PREC_LOGIC_OR }, // OR,
{ &GDScriptParser::parse_unary_operator, nullptr, PREC_NONE }, // NOT,
{ nullptr, &GDScriptParser::parse_binary_operator, PREC_LOGIC_AND }, // AMPERSAND_AMPERSAND,
{ nullptr, &GDScriptParser::parse_binary_operator, PREC_LOGIC_OR }, // PIPE_PIPE,
{ &GDScriptParser::parse_unary_operator, nullptr, PREC_NONE }, // BANG,
// Bitwise
{ nullptr, &GDScriptParser::parse_binary_operator, PREC_BIT_AND }, // AMPERSAND,
{ nullptr, &GDScriptParser::parse_binary_operator, PREC_BIT_OR }, // PIPE,
{ &GDScriptParser::parse_unary_operator, nullptr, PREC_NONE }, // TILDE,
{ nullptr, &GDScriptParser::parse_binary_operator, PREC_BIT_XOR }, // CARET,
{ nullptr, &GDScriptParser::parse_binary_operator, PREC_BIT_SHIFT }, // LESS_LESS,
{ nullptr, &GDScriptParser::parse_binary_operator, PREC_BIT_SHIFT }, // GREATER_GREATER,
// Math
{ &GDScriptParser::parse_unary_operator, &GDScriptParser::parse_binary_operator, PREC_ADDITION }, // PLUS,
{ &GDScriptParser::parse_unary_operator, &GDScriptParser::parse_binary_operator, PREC_SUBTRACTION }, // MINUS,
{ nullptr, &GDScriptParser::parse_binary_operator, PREC_FACTOR }, // STAR,
{ nullptr, &GDScriptParser::parse_binary_operator, PREC_FACTOR }, // SLASH,
{ nullptr, &GDScriptParser::parse_binary_operator, PREC_FACTOR }, // PERCENT,
// Assignment
{ nullptr, &GDScriptParser::parse_assignment, PREC_ASSIGNMENT }, // EQUAL,
{ nullptr, &GDScriptParser::parse_assignment, PREC_ASSIGNMENT }, // PLUS_EQUAL,
{ nullptr, &GDScriptParser::parse_assignment, PREC_ASSIGNMENT }, // MINUS_EQUAL,
{ nullptr, &GDScriptParser::parse_assignment, PREC_ASSIGNMENT }, // STAR_EQUAL,
{ nullptr, &GDScriptParser::parse_assignment, PREC_ASSIGNMENT }, // SLASH_EQUAL,
{ nullptr, &GDScriptParser::parse_assignment, PREC_ASSIGNMENT }, // PERCENT_EQUAL,
{ nullptr, &GDScriptParser::parse_assignment, PREC_ASSIGNMENT }, // LESS_LESS_EQUAL,
{ nullptr, &GDScriptParser::parse_assignment, PREC_ASSIGNMENT }, // GREATER_GREATER_EQUAL,
{ nullptr, &GDScriptParser::parse_assignment, PREC_ASSIGNMENT }, // AMPERSAND_EQUAL,
{ nullptr, &GDScriptParser::parse_assignment, PREC_ASSIGNMENT }, // PIPE_EQUAL,
{ nullptr, &GDScriptParser::parse_assignment, PREC_ASSIGNMENT }, // CARET_EQUAL,
// Control flow
{ nullptr, &GDScriptParser::parse_ternary_operator, PREC_TERNARY }, // IF,
{ nullptr, nullptr, PREC_NONE }, // ELIF,
{ nullptr, nullptr, PREC_NONE }, // ELSE,
{ nullptr, nullptr, PREC_NONE }, // FOR,
{ nullptr, nullptr, PREC_NONE }, // WHILE,
{ nullptr, nullptr, PREC_NONE }, // BREAK,
{ nullptr, nullptr, PREC_NONE }, // CONTINUE,
{ nullptr, nullptr, PREC_NONE }, // PASS,
{ nullptr, nullptr, PREC_NONE }, // RETURN,
{ nullptr, nullptr, PREC_NONE }, // MATCH,
// Keywords
{ nullptr, &GDScriptParser::parse_cast, PREC_CAST }, // AS,
{ nullptr, nullptr, PREC_NONE }, // ASSERT,
{ &GDScriptParser::parse_await, nullptr, PREC_NONE }, // AWAIT,
{ nullptr, nullptr, PREC_NONE }, // BREAKPOINT,
{ nullptr, nullptr, PREC_NONE }, // CLASS,
{ nullptr, nullptr, PREC_NONE }, // CLASS_NAME,
{ nullptr, nullptr, PREC_NONE }, // CONST,
{ nullptr, nullptr, PREC_NONE }, // ENUM,
{ nullptr, nullptr, PREC_NONE }, // EXTENDS,
{ nullptr, nullptr, PREC_NONE }, // FUNC,
{ nullptr, &GDScriptParser::parse_binary_operator, PREC_CONTENT_TEST }, // IN,
{ nullptr, &GDScriptParser::parse_binary_operator, PREC_TYPE_TEST }, // IS,
{ nullptr, nullptr, PREC_NONE }, // NAMESPACE,
{ &GDScriptParser::parse_preload, nullptr, PREC_NONE }, // PRELOAD,
{ &GDScriptParser::parse_self, nullptr, PREC_NONE }, // SELF,
{ nullptr, nullptr, PREC_NONE }, // SIGNAL,
{ nullptr, nullptr, PREC_NONE }, // STATIC,
{ &GDScriptParser::parse_call, nullptr, PREC_NONE }, // SUPER,
{ nullptr, nullptr, PREC_NONE }, // TRAIT,
{ nullptr, nullptr, PREC_NONE }, // VAR,
{ nullptr, nullptr, PREC_NONE }, // VOID,
{ nullptr, nullptr, PREC_NONE }, // YIELD,
// Punctuation
{ &GDScriptParser::parse_array, &GDScriptParser::parse_subscript, PREC_SUBSCRIPT }, // BRACKET_OPEN,
{ nullptr, nullptr, PREC_NONE }, // BRACKET_CLOSE,
{ &GDScriptParser::parse_dictionary, nullptr, PREC_NONE }, // BRACE_OPEN,
{ nullptr, nullptr, PREC_NONE }, // BRACE_CLOSE,
{ &GDScriptParser::parse_grouping, &GDScriptParser::parse_call, PREC_CALL }, // PARENTHESIS_OPEN,
{ nullptr, nullptr, PREC_NONE }, // PARENTHESIS_CLOSE,
{ nullptr, nullptr, PREC_NONE }, // COMMA,
{ nullptr, nullptr, PREC_NONE }, // SEMICOLON,
{ nullptr, &GDScriptParser::parse_attribute, PREC_ATTRIBUTE }, // PERIOD,
{ nullptr, nullptr, PREC_NONE }, // PERIOD_PERIOD,
{ nullptr, nullptr, PREC_NONE }, // COLON,
{ &GDScriptParser::parse_get_node, nullptr, PREC_NONE }, // DOLLAR,
{ nullptr, nullptr, PREC_NONE }, // FORWARD_ARROW,
{ nullptr, nullptr, PREC_NONE }, // UNDERSCORE,
// Whitespace
{ nullptr, nullptr, PREC_NONE }, // NEWLINE,
{ nullptr, nullptr, PREC_NONE }, // INDENT,
{ nullptr, nullptr, PREC_NONE }, // DEDENT,
// Constants
{ &GDScriptParser::parse_builtin_constant, nullptr, PREC_NONE }, // CONST_PI,
{ &GDScriptParser::parse_builtin_constant, nullptr, PREC_NONE }, // CONST_TAU,
{ &GDScriptParser::parse_builtin_constant, nullptr, PREC_NONE }, // CONST_INF,
{ &GDScriptParser::parse_builtin_constant, nullptr, PREC_NONE }, // CONST_NAN,
// Error message improvement
{ nullptr, nullptr, PREC_NONE }, // VCS_CONFLICT_MARKER,
{ nullptr, nullptr, PREC_NONE }, // BACKTICK,
{ nullptr, &GDScriptParser::parse_invalid_token, PREC_CAST }, // QUESTION_MARK,
// Special
{ nullptr, nullptr, PREC_NONE }, // ERROR,
{ nullptr, nullptr, PREC_NONE }, // TK_EOF,
};
/* clang-format on */
// Avoid desync.
static_assert(sizeof(rules) / sizeof(rules[0]) == GDScriptTokenizer::Token::TK_MAX, "Amount of parse rules don't match the amount of token types.");
// Let's assume this this never invalid, since nothing generates a TK_MAX.
return &rules[p_token_type];
}
bool GDScriptParser::SuiteNode::has_local(const StringName &p_name) const {
if (locals_indices.has(p_name)) {
return true;
}
if (parent_block != nullptr) {
return parent_block->has_local(p_name);
}
return false;
}
const GDScriptParser::SuiteNode::Local &GDScriptParser::SuiteNode::get_local(const StringName &p_name) const {
if (locals_indices.has(p_name)) {
return locals[locals_indices[p_name]];
}
if (parent_block != nullptr) {
return parent_block->get_local(p_name);
}
return empty;
}
bool GDScriptParser::AnnotationNode::apply(GDScriptParser *p_this, Node *p_target) const {
return (p_this->*(p_this->valid_annotations[name].apply))(this, p_target);
}
bool GDScriptParser::AnnotationNode::applies_to(uint32_t p_target_kinds) const {
return (info->target_kind & p_target_kinds) > 0;
}
bool GDScriptParser::validate_annotation_arguments(AnnotationNode *p_annotation) {
ERR_FAIL_COND_V_MSG(!valid_annotations.has(p_annotation->name), false, vformat(R"(Annotation "%s" not found to validate.)", p_annotation->name));
const MethodInfo &info = valid_annotations[p_annotation->name].info;
if (((info.flags & METHOD_FLAG_VARARG) == 0) && p_annotation->arguments.size() > info.arguments.size()) {
push_error(vformat(R"(Annotation "%s" requires at most %d arguments, but %d were given.)", p_annotation->name, info.arguments.size(), p_annotation->arguments.size()));
return false;
}
if (p_annotation->arguments.size() < info.arguments.size() - info.default_arguments.size()) {
push_error(vformat(R"(Annotation "%s" requires at least %d arguments, but %d were given.)", p_annotation->name, info.arguments.size() - info.default_arguments.size(), p_annotation->arguments.size()));
return false;
}
const List<PropertyInfo>::Element *E = info.arguments.front();
for (int i = 0; i < p_annotation->arguments.size(); i++) {
ExpressionNode *argument = p_annotation->arguments[i];
const PropertyInfo &parameter = E->get();
if (E->next() != nullptr) {
E = E->next();
}
switch (parameter.type) {
case Variant::STRING:
case Variant::STRING_NAME:
case Variant::NODE_PATH:
// Allow "quote-less strings", as long as they are recognized as identifiers.
if (argument->type == Node::IDENTIFIER) {
IdentifierNode *string = static_cast<IdentifierNode *>(argument);
Callable::CallError error;
Vector<Variant> args = varray(string->name);
const Variant *name = args.ptr();
p_annotation->resolved_arguments.push_back(Variant::construct(parameter.type, &(name), 1, error));
if (error.error != Callable::CallError::CALL_OK) {
push_error(vformat(R"(Expected %s as argument %d of annotation "%s").)", Variant::get_type_name(parameter.type), i + 1, p_annotation->name));
p_annotation->resolved_arguments.remove(p_annotation->resolved_arguments.size() - 1);
return false;
}
break;
}
[[fallthrough]];
default: {
if (argument->type != Node::LITERAL) {
push_error(vformat(R"(Expected %s as argument %d of annotation "%s").)", Variant::get_type_name(parameter.type), i + 1, p_annotation->name));
return false;
}
Variant value = static_cast<LiteralNode *>(argument)->value;
if (!Variant::can_convert_strict(value.get_type(), parameter.type)) {
push_error(vformat(R"(Expected %s as argument %d of annotation "%s").)", Variant::get_type_name(parameter.type), i + 1, p_annotation->name));
return false;
}
Callable::CallError error;
const Variant *args = &value;
p_annotation->resolved_arguments.push_back(Variant::construct(parameter.type, &(args), 1, error));
if (error.error != Callable::CallError::CALL_OK) {
push_error(vformat(R"(Expected %s as argument %d of annotation "%s").)", Variant::get_type_name(parameter.type), i + 1, p_annotation->name));
p_annotation->resolved_arguments.remove(p_annotation->resolved_arguments.size() - 1);
return false;
}
break;
}
}
}
return true;
}
bool GDScriptParser::tool_annotation(const AnnotationNode *p_annotation, Node *p_node) {
this->_is_tool = true;
return true;
}
bool GDScriptParser::icon_annotation(const AnnotationNode *p_annotation, Node *p_node) {
ERR_FAIL_COND_V_MSG(p_node->type != Node::CLASS, false, R"("@icon" annotation can only be applied to classes.)");
ClassNode *p_class = static_cast<ClassNode *>(p_node);
p_class->icon_path = p_annotation->resolved_arguments[0];
return true;
}
bool GDScriptParser::onready_annotation(const AnnotationNode *p_annotation, Node *p_node) {
ERR_FAIL_COND_V_MSG(p_node->type != Node::VARIABLE, false, R"("@onready" annotation can only be applied to class variables.)");
VariableNode *variable = static_cast<VariableNode *>(p_node);
if (variable->onready) {
push_error(R"("@onready" annotation can only be used once per variable.)");
return false;
}
variable->onready = true;
current_class->onready_used = true;
return true;
}
template <PropertyHint t_hint, Variant::Type t_type>
bool GDScriptParser::export_annotations(const AnnotationNode *p_annotation, Node *p_node) {
ERR_FAIL_COND_V_MSG(p_node->type != Node::VARIABLE, false, vformat(R"("%s" annotation can only be applied to variables.)", p_annotation->name));
VariableNode *variable = static_cast<VariableNode *>(p_node);
if (variable->exported) {
push_error(vformat(R"(Annotation "%s" cannot be used with another "@export" annotation.)", p_annotation->name), p_annotation);
return false;
}
variable->exported = true;
// TODO: Improving setting type, especially for range hints, which can be int or float.
variable->export_info.type = t_type;
variable->export_info.hint = t_hint;
if (p_annotation->name == "@export") {
if (variable->datatype_specifier == nullptr) {
if (variable->initializer == nullptr) {
push_error(R"(Cannot use "@export" annotation with variable without type or initializer, since type can't be inferred.)", p_annotation);
return false;
}
if (variable->initializer->type != Node::LITERAL) {
push_error(R"(To use "@export" annotation with type-less variable, the default value must be a literal.)", p_annotation);
return false;
}
variable->export_info.type = static_cast<LiteralNode *>(variable->initializer)->value.get_type();
} // else: Actual type will be set by the analyzer, which can infer the proper type.
}
String hint_string;
for (int i = 0; i < p_annotation->resolved_arguments.size(); i++) {
if (i > 0) {
hint_string += ",";
}
hint_string += String(p_annotation->resolved_arguments[i]);
}
variable->export_info.hint_string = hint_string;
return true;
}
bool GDScriptParser::warning_annotations(const AnnotationNode *p_annotation, Node *p_node) {
ERR_FAIL_V_MSG(false, "Not implemented.");
}
template <MultiplayerAPI::RPCMode t_mode>
bool GDScriptParser::network_annotations(const AnnotationNode *p_annotation, Node *p_node) {
ERR_FAIL_COND_V_MSG(p_node->type != Node::VARIABLE && p_node->type != Node::FUNCTION, false, vformat(R"("%s" annotation can only be applied to variables and functions.)", p_annotation->name));
switch (p_node->type) {
case Node::VARIABLE: {
VariableNode *variable = static_cast<VariableNode *>(p_node);
if (variable->rpc_mode != MultiplayerAPI::RPC_MODE_DISABLED) {
push_error(R"(RPC annotations can only be used once per variable.)", p_annotation);
}
variable->rpc_mode = t_mode;
break;
}
case Node::FUNCTION: {
FunctionNode *function = static_cast<FunctionNode *>(p_node);
if (function->rpc_mode != MultiplayerAPI::RPC_MODE_DISABLED) {
push_error(R"(RPC annotations can only be used once per function.)", p_annotation);
}
function->rpc_mode = t_mode;
break;
}
default:
return false; // Unreachable.
}
return true;
}
GDScriptParser::DataType GDScriptParser::SuiteNode::Local::get_datatype() const {
switch (type) {
case CONSTANT:
return constant->get_datatype();
case VARIABLE:
return variable->get_datatype();
case PARAMETER:
return parameter->get_datatype();
case FOR_VARIABLE:
case PATTERN_BIND:
return bind->get_datatype();
case UNDEFINED:
return DataType();
}
return DataType();
}
String GDScriptParser::SuiteNode::Local::get_name() const {
String name;
switch (type) {
case SuiteNode::Local::PARAMETER:
name = "parameter";
break;
case SuiteNode::Local::CONSTANT:
name = "constant";
break;
case SuiteNode::Local::VARIABLE:
name = "variable";
break;
case SuiteNode::Local::FOR_VARIABLE:
name = "for loop iterator";
break;
case SuiteNode::Local::PATTERN_BIND:
name = "pattern_bind";
break;
case SuiteNode::Local::UNDEFINED:
name = "<undefined>";
break;
}
return name;
}
String GDScriptParser::DataType::to_string() const {
switch (kind) {
case VARIANT:
return "Variant";
case BUILTIN:
if (builtin_type == Variant::NIL) {
return "null";
}
return Variant::get_type_name(builtin_type);
case NATIVE:
if (is_meta_type) {
return GDScriptNativeClass::get_class_static();
}
return native_type.operator String();
case CLASS:
if (is_meta_type) {
return GDScript::get_class_static();
}
if (class_type->identifier != nullptr) {
return class_type->identifier->name.operator String();
}
return class_type->fqcn;
case SCRIPT: {
if (is_meta_type) {
return script_type->get_class_name().operator String();
}
String name = script_type->get_name();
if (!name.empty()) {
return name;
}
name = script_path;
if (!name.empty()) {
return name;
}
return native_type.operator String();
}
case ENUM:
return enum_type.operator String() + " (enum)";
case ENUM_VALUE:
return enum_type.operator String() + " (enum value)";
case UNRESOLVED:
return "<unresolved type>";
}
ERR_FAIL_V_MSG("<unresolved type", "Kind set outside the enum range.");
}
/*---------- PRETTY PRINT FOR DEBUG ----------*/
#ifdef DEBUG_ENABLED
void GDScriptParser::TreePrinter::increase_indent() {
indent_level++;
indent = "";
for (int i = 0; i < indent_level * 4; i++) {
if (i % 4 == 0) {
indent += "|";
} else {
indent += " ";
}
}
}
void GDScriptParser::TreePrinter::decrease_indent() {
indent_level--;
indent = "";
for (int i = 0; i < indent_level * 4; i++) {
if (i % 4 == 0) {
indent += "|";
} else {
indent += " ";
}
}
}
void GDScriptParser::TreePrinter::push_line(const String &p_line) {
if (!p_line.empty()) {
push_text(p_line);
}
printed += "\n";
pending_indent = true;
}
void GDScriptParser::TreePrinter::push_text(const String &p_text) {
if (pending_indent) {
printed += indent;
pending_indent = false;
}
printed += p_text;
}
void GDScriptParser::TreePrinter::print_annotation(AnnotationNode *p_annotation) {
push_text(p_annotation->name);
push_text(" (");
for (int i = 0; i < p_annotation->arguments.size(); i++) {
if (i > 0) {
push_text(" , ");
}
print_expression(p_annotation->arguments[i]);
}
push_line(")");
}
void GDScriptParser::TreePrinter::print_array(ArrayNode *p_array) {
push_text("[ ");
for (int i = 0; i < p_array->elements.size(); i++) {
if (i > 0) {
push_text(" , ");
}
print_expression(p_array->elements[i]);
}
push_text(" ]");
}
void GDScriptParser::TreePrinter::print_assert(AssertNode *p_assert) {
push_text("Assert ( ");
print_expression(p_assert->condition);
push_line(" )");
}
void GDScriptParser::TreePrinter::print_assignment(AssignmentNode *p_assignment) {
switch (p_assignment->assignee->type) {
case Node::IDENTIFIER:
print_identifier(static_cast<IdentifierNode *>(p_assignment->assignee));
break;
case Node::SUBSCRIPT:
print_subscript(static_cast<SubscriptNode *>(p_assignment->assignee));
break;
default:
break; // Unreachable.
}
push_text(" ");
switch (p_assignment->operation) {
case AssignmentNode::OP_ADDITION:
push_text("+");
break;
case AssignmentNode::OP_SUBTRACTION:
push_text("-");
break;
case AssignmentNode::OP_MULTIPLICATION:
push_text("*");
break;
case AssignmentNode::OP_DIVISION:
push_text("/");
break;
case AssignmentNode::OP_MODULO:
push_text("%");
break;
case AssignmentNode::OP_BIT_SHIFT_LEFT:
push_text("<<");
break;
case AssignmentNode::OP_BIT_SHIFT_RIGHT:
push_text(">>");
break;
case AssignmentNode::OP_BIT_AND:
push_text("&");
break;
case AssignmentNode::OP_BIT_OR:
push_text("|");
break;
case AssignmentNode::OP_BIT_XOR:
push_text("^");
break;
case AssignmentNode::OP_NONE:
break;
}
push_text("= ");
print_expression(p_assignment->assigned_value);
push_line();
}
void GDScriptParser::TreePrinter::print_await(AwaitNode *p_await) {
push_text("Await ");
print_expression(p_await->to_await);
}
void GDScriptParser::TreePrinter::print_binary_op(BinaryOpNode *p_binary_op) {
// Surround in parenthesis for disambiguation.
push_text("(");
print_expression(p_binary_op->left_operand);
switch (p_binary_op->operation) {
case BinaryOpNode::OP_ADDITION:
push_text(" + ");
break;
case BinaryOpNode::OP_SUBTRACTION:
push_text(" - ");
break;
case BinaryOpNode::OP_MULTIPLICATION:
push_text(" * ");
break;
case BinaryOpNode::OP_DIVISION:
push_text(" / ");
break;
case BinaryOpNode::OP_MODULO:
push_text(" % ");
break;
case BinaryOpNode::OP_BIT_LEFT_SHIFT:
push_text(" << ");
break;
case BinaryOpNode::OP_BIT_RIGHT_SHIFT:
push_text(" >> ");
break;
case BinaryOpNode::OP_BIT_AND:
push_text(" & ");
break;
case BinaryOpNode::OP_BIT_OR:
push_text(" | ");
break;
case BinaryOpNode::OP_BIT_XOR:
push_text(" ^ ");
break;
case BinaryOpNode::OP_LOGIC_AND:
push_text(" AND ");
break;
case BinaryOpNode::OP_LOGIC_OR:
push_text(" OR ");
break;
case BinaryOpNode::OP_TYPE_TEST:
push_text(" IS ");
break;
case BinaryOpNode::OP_CONTENT_TEST:
push_text(" IN ");
break;
case BinaryOpNode::OP_COMP_EQUAL:
push_text(" == ");
break;
case BinaryOpNode::OP_COMP_NOT_EQUAL:
push_text(" != ");
break;
case BinaryOpNode::OP_COMP_LESS:
push_text(" < ");
break;
case BinaryOpNode::OP_COMP_LESS_EQUAL:
push_text(" <= ");
break;
case BinaryOpNode::OP_COMP_GREATER:
push_text(" > ");
break;
case BinaryOpNode::OP_COMP_GREATER_EQUAL:
push_text(" >= ");
break;
}
print_expression(p_binary_op->right_operand);
// Surround in parenthesis for disambiguation.
push_text(")");
}
void GDScriptParser::TreePrinter::print_call(CallNode *p_call) {
if (p_call->is_super) {
push_text("super");
if (p_call->callee != nullptr) {
push_text(".");
print_expression(p_call->callee);
}
} else {
print_expression(p_call->callee);
}
push_text("( ");
for (int i = 0; i < p_call->arguments.size(); i++) {
if (i > 0) {
push_text(" , ");
}
print_expression(p_call->arguments[i]);
}
push_text(" )");
}
void GDScriptParser::TreePrinter::print_cast(CastNode *p_cast) {
print_expression(p_cast->operand);
push_text(" AS ");
print_type(p_cast->cast_type);
}
void GDScriptParser::TreePrinter::print_class(ClassNode *p_class) {
push_text("Class ");
if (p_class->identifier == nullptr) {
push_text("<unnamed>");
} else {
print_identifier(p_class->identifier);
}
if (p_class->extends_used) {
bool first = true;
push_text(" Extends ");
if (!p_class->extends_path.empty()) {
push_text(vformat(R"("%s")", p_class->extends_path));
first = false;
}
for (int i = 0; i < p_class->extends.size(); i++) {
if (!first) {
push_text(".");
} else {
first = false;
}
push_text(p_class->extends[i]);
}
}
push_line(" :");
increase_indent();
for (int i = 0; i < p_class->members.size(); i++) {
const ClassNode::Member &m = p_class->members[i];
switch (m.type) {
case ClassNode::Member::CLASS:
print_class(m.m_class);
break;
case ClassNode::Member::VARIABLE:
print_variable(m.variable);
break;
case ClassNode::Member::CONSTANT:
print_constant(m.constant);
break;
case ClassNode::Member::SIGNAL:
print_signal(m.signal);
break;
case ClassNode::Member::FUNCTION:
print_function(m.function);
break;
case ClassNode::Member::ENUM:
print_enum(m.m_enum);
break;
case ClassNode::Member::ENUM_VALUE:
break; // Nothing. Will be printed by enum.
case ClassNode::Member::UNDEFINED:
push_line("<unknown member>");
break;
}
}
decrease_indent();
}
void GDScriptParser::TreePrinter::print_constant(ConstantNode *p_constant) {
push_text("Constant ");
print_identifier(p_constant->identifier);
increase_indent();
push_line();
push_text("= ");
if (p_constant->initializer == nullptr) {
push_text("<missing value>");
} else {
print_expression(p_constant->initializer);
}
decrease_indent();
push_line();
}
void GDScriptParser::TreePrinter::print_dictionary(DictionaryNode *p_dictionary) {
push_line("{");
increase_indent();
for (int i = 0; i < p_dictionary->elements.size(); i++) {
print_expression(p_dictionary->elements[i].key);
if (p_dictionary->style == DictionaryNode::PYTHON_DICT) {
push_text(" : ");
} else {
push_text(" = ");
}
print_expression(p_dictionary->elements[i].value);
push_line(" ,");
}
decrease_indent();
push_text("}");
}
void GDScriptParser::TreePrinter::print_expression(ExpressionNode *p_expression) {
switch (p_expression->type) {
case Node::ARRAY:
print_array(static_cast<ArrayNode *>(p_expression));
break;
case Node::ASSIGNMENT:
print_assignment(static_cast<AssignmentNode *>(p_expression));
break;
case Node::AWAIT:
print_await(static_cast<AwaitNode *>(p_expression));
break;
case Node::BINARY_OPERATOR:
print_binary_op(static_cast<BinaryOpNode *>(p_expression));
break;
case Node::CALL:
print_call(static_cast<CallNode *>(p_expression));
break;
case Node::CAST:
print_cast(static_cast<CastNode *>(p_expression));
break;
case Node::DICTIONARY:
print_dictionary(static_cast<DictionaryNode *>(p_expression));
break;
case Node::GET_NODE:
print_get_node(static_cast<GetNodeNode *>(p_expression));
break;
case Node::IDENTIFIER:
print_identifier(static_cast<IdentifierNode *>(p_expression));
break;
case Node::LITERAL:
print_literal(static_cast<LiteralNode *>(p_expression));
break;
case Node::PRELOAD:
print_preload(static_cast<PreloadNode *>(p_expression));
break;
case Node::SELF:
print_self(static_cast<SelfNode *>(p_expression));
break;
case Node::SUBSCRIPT:
print_subscript(static_cast<SubscriptNode *>(p_expression));
break;
case Node::TERNARY_OPERATOR:
print_ternary_op(static_cast<TernaryOpNode *>(p_expression));
break;
case Node::UNARY_OPERATOR:
print_unary_op(static_cast<UnaryOpNode *>(p_expression));
break;
default:
push_text(vformat("<unknown expression %d>", p_expression->type));
break;
}
}
void GDScriptParser::TreePrinter::print_enum(EnumNode *p_enum) {
push_text("Enum ");
if (p_enum->identifier != nullptr) {
print_identifier(p_enum->identifier);
} else {
push_text("<unnamed>");
}
push_line(" {");
increase_indent();
for (int i = 0; i < p_enum->values.size(); i++) {
const EnumNode::Value &item = p_enum->values[i];
print_identifier(item.identifier);
push_text(" = ");
push_text(itos(item.value));
push_line(" ,");
}
decrease_indent();
push_line("}");
}
void GDScriptParser::TreePrinter::print_for(ForNode *p_for) {
push_text("For ");
print_identifier(p_for->variable);
push_text(" IN ");
print_expression(p_for->list);
push_line(" :");
increase_indent();
print_suite(p_for->loop);
decrease_indent();
}
void GDScriptParser::TreePrinter::print_function(FunctionNode *p_function) {
for (const List<AnnotationNode *>::Element *E = p_function->annotations.front(); E != nullptr; E = E->next()) {
print_annotation(E->get());
}
push_text("Function ");
print_identifier(p_function->identifier);
push_text("( ");
for (int i = 0; i < p_function->parameters.size(); i++) {
if (i > 0) {
push_text(" , ");
}
print_parameter(p_function->parameters[i]);
}
push_line(" ) :");
increase_indent();
print_suite(p_function->body);
decrease_indent();
}
void GDScriptParser::TreePrinter::print_get_node(GetNodeNode *p_get_node) {
push_text("$");
if (p_get_node->string != nullptr) {
print_literal(p_get_node->string);
} else {
for (int i = 0; i < p_get_node->chain.size(); i++) {
if (i > 0) {
push_text("/");
}
print_identifier(p_get_node->chain[i]);
}
}
}
void GDScriptParser::TreePrinter::print_identifier(IdentifierNode *p_identifier) {
push_text(p_identifier->name);
}
void GDScriptParser::TreePrinter::print_if(IfNode *p_if, bool p_is_elif) {
if (p_is_elif) {
push_text("Elif ");
} else {
push_text("If ");
}
print_expression(p_if->condition);
push_line(" :");
increase_indent();
print_suite(p_if->true_block);
decrease_indent();
// FIXME: Properly detect "elif" blocks.
if (p_if->false_block != nullptr) {
push_line("Else :");
increase_indent();
print_suite(p_if->false_block);
decrease_indent();
}
}
void GDScriptParser::TreePrinter::print_literal(LiteralNode *p_literal) {
// Prefix for string types.
switch (p_literal->value.get_type()) {
case Variant::NODE_PATH:
push_text("^\"");
break;
case Variant::STRING:
push_text("\"");
break;
case Variant::STRING_NAME:
push_text("&\"");
break;
default:
break;
}
push_text(p_literal->value);
// Suffix for string types.
switch (p_literal->value.get_type()) {
case Variant::NODE_PATH:
case Variant::STRING:
case Variant::STRING_NAME:
push_text("\"");
break;
default:
break;
}
}
void GDScriptParser::TreePrinter::print_match(MatchNode *p_match) {
push_text("Match ");
print_expression(p_match->test);
push_line(" :");
increase_indent();
for (int i = 0; i < p_match->branches.size(); i++) {
print_match_branch(p_match->branches[i]);
}
decrease_indent();
}
void GDScriptParser::TreePrinter::print_match_branch(MatchBranchNode *p_match_branch) {
for (int i = 0; i < p_match_branch->patterns.size(); i++) {
if (i > 0) {
push_text(" , ");
}
print_match_pattern(p_match_branch->patterns[i]);
}
push_line(" :");
increase_indent();
print_suite(p_match_branch->block);
decrease_indent();
}
void GDScriptParser::TreePrinter::print_match_pattern(PatternNode *p_match_pattern) {
switch (p_match_pattern->pattern_type) {
case PatternNode::PT_LITERAL:
print_literal(p_match_pattern->literal);
break;
case PatternNode::PT_WILDCARD:
push_text("_");
break;
case PatternNode::PT_REST:
push_text("..");
break;
case PatternNode::PT_BIND:
push_text("Var ");
print_identifier(p_match_pattern->bind);
break;
case PatternNode::PT_EXPRESSION:
print_expression(p_match_pattern->expression);
break;
case PatternNode::PT_ARRAY:
push_text("[ ");
for (int i = 0; i < p_match_pattern->array.size(); i++) {
if (i > 0) {
push_text(" , ");
}
print_match_pattern(p_match_pattern->array[i]);
}
push_text(" ]");
break;
case PatternNode::PT_DICTIONARY:
push_text("{ ");
for (int i = 0; i < p_match_pattern->dictionary.size(); i++) {
if (i > 0) {
push_text(" , ");
}
if (p_match_pattern->dictionary[i].key != nullptr) {
// Key can be null for rest pattern.
print_expression(p_match_pattern->dictionary[i].key);
push_text(" : ");
}
print_match_pattern(p_match_pattern->dictionary[i].value_pattern);
}
push_text(" }");
break;
}
}
void GDScriptParser::TreePrinter::print_parameter(ParameterNode *p_parameter) {
print_identifier(p_parameter->identifier);
if (p_parameter->datatype_specifier != nullptr) {
push_text(" : ");
print_type(p_parameter->datatype_specifier);
}
if (p_parameter->default_value != nullptr) {
push_text(" = ");
print_expression(p_parameter->default_value);
}
}
void GDScriptParser::TreePrinter::print_preload(PreloadNode *p_preload) {
push_text(R"(Preload ( ")");
push_text(p_preload->resolved_path);
push_text(R"(" )");
}
void GDScriptParser::TreePrinter::print_return(ReturnNode *p_return) {
push_text("Return");
if (p_return->return_value != nullptr) {
push_text(" ");
print_expression(p_return->return_value);
}
push_line();
}
void GDScriptParser::TreePrinter::print_self(SelfNode *p_self) {
push_text("Self(");
if (p_self->current_class->identifier != nullptr) {
print_identifier(p_self->current_class->identifier);
} else {
push_text("<main class>");
}
push_text(")");
}
void GDScriptParser::TreePrinter::print_signal(SignalNode *p_signal) {
push_text("Signal ");
print_identifier(p_signal->identifier);
push_text("( ");
for (int i = 0; i < p_signal->parameters.size(); i++) {
print_parameter(p_signal->parameters[i]);
}
push_line(" )");
}
void GDScriptParser::TreePrinter::print_subscript(SubscriptNode *p_subscript) {
print_expression(p_subscript->base);
if (p_subscript->is_attribute) {
push_text(".");
print_identifier(p_subscript->attribute);
} else {
push_text("[ ");
print_expression(p_subscript->index);
push_text(" ]");
}
}
void GDScriptParser::TreePrinter::print_statement(Node *p_statement) {
switch (p_statement->type) {
case Node::ASSERT:
print_assert(static_cast<AssertNode *>(p_statement));
break;
case Node::VARIABLE:
print_variable(static_cast<VariableNode *>(p_statement));
break;
case Node::CONSTANT:
print_constant(static_cast<ConstantNode *>(p_statement));
break;
case Node::IF:
print_if(static_cast<IfNode *>(p_statement));
break;
case Node::FOR:
print_for(static_cast<ForNode *>(p_statement));
break;
case Node::WHILE:
print_while(static_cast<WhileNode *>(p_statement));
break;
case Node::MATCH:
print_match(static_cast<MatchNode *>(p_statement));
break;
case Node::RETURN:
print_return(static_cast<ReturnNode *>(p_statement));
break;
case Node::BREAK:
push_line("Break");
break;
case Node::CONTINUE:
push_line("Continue");
break;
case Node::PASS:
push_line("Pass");
break;
case Node::BREAKPOINT:
push_line("Breakpoint");
break;
case Node::ASSIGNMENT:
print_assignment(static_cast<AssignmentNode *>(p_statement));
break;
default:
if (p_statement->is_expression()) {
print_expression(static_cast<ExpressionNode *>(p_statement));
push_line();
} else {
push_line(vformat("<unknown statement %d>", p_statement->type));
}
break;
}
}
void GDScriptParser::TreePrinter::print_suite(SuiteNode *p_suite) {
for (int i = 0; i < p_suite->statements.size(); i++) {
print_statement(p_suite->statements[i]);
}
}
void GDScriptParser::TreePrinter::print_ternary_op(TernaryOpNode *p_ternary_op) {
// Surround in parenthesis for disambiguation.
push_text("(");
print_expression(p_ternary_op->true_expr);
push_text(") IF (");
print_expression(p_ternary_op->condition);
push_text(") ELSE (");
print_expression(p_ternary_op->false_expr);
push_text(")");
}
void GDScriptParser::TreePrinter::print_type(TypeNode *p_type) {
if (p_type->type_chain.empty()) {
push_text("Void");
} else {
for (int i = 0; i < p_type->type_chain.size(); i++) {
if (i > 0) {
push_text(".");
}
print_identifier(p_type->type_chain[i]);
}
}
}
void GDScriptParser::TreePrinter::print_unary_op(UnaryOpNode *p_unary_op) {
// Surround in parenthesis for disambiguation.
push_text("(");
switch (p_unary_op->operation) {
case UnaryOpNode::OP_POSITIVE:
push_text("+");
break;
case UnaryOpNode::OP_NEGATIVE:
push_text("-");
break;
case UnaryOpNode::OP_LOGIC_NOT:
push_text("NOT");
break;
case UnaryOpNode::OP_COMPLEMENT:
push_text("~");
break;
}
print_expression(p_unary_op->operand);
// Surround in parenthesis for disambiguation.
push_text(")");
}
void GDScriptParser::TreePrinter::print_variable(VariableNode *p_variable) {
for (const List<AnnotationNode *>::Element *E = p_variable->annotations.front(); E != nullptr; E = E->next()) {
print_annotation(E->get());
}
push_text("Variable ");
print_identifier(p_variable->identifier);
push_text(" : ");
if (p_variable->datatype_specifier != nullptr) {
print_type(p_variable->datatype_specifier);
} else if (p_variable->infer_datatype) {
push_text("<inferred type>");
} else {
push_text("Variant");
}
increase_indent();
push_line();
push_text("= ");
if (p_variable->initializer == nullptr) {
push_text("<default value>");
} else {
print_expression(p_variable->initializer);
}
push_line();
if (p_variable->property != VariableNode::PROP_NONE) {
if (p_variable->getter != nullptr) {
push_text("Get");
if (p_variable->property == VariableNode::PROP_INLINE) {
push_line(":");
increase_indent();
print_suite(p_variable->getter);
decrease_indent();
} else {
push_line(" =");
increase_indent();
print_identifier(p_variable->getter_pointer);
push_line();
decrease_indent();
}
}
if (p_variable->setter != nullptr) {
push_text("Set (");
if (p_variable->property == VariableNode::PROP_INLINE) {
if (p_variable->setter_parameter != nullptr) {
print_identifier(p_variable->setter_parameter);
} else {
push_text("<missing>");
}
push_line("):");
increase_indent();
print_suite(p_variable->setter);
decrease_indent();
} else {
push_line(" =");
increase_indent();
print_identifier(p_variable->setter_pointer);
push_line();
decrease_indent();
}
}
}
decrease_indent();
push_line();
}
void GDScriptParser::TreePrinter::print_while(WhileNode *p_while) {
push_text("While ");
print_expression(p_while->condition);
push_line(" :");
increase_indent();
print_suite(p_while->loop);
decrease_indent();
}
void GDScriptParser::TreePrinter::print_tree(const GDScriptParser &p_parser) {
ERR_FAIL_COND_MSG(p_parser.get_tree() == nullptr, "Parse the code before printing the parse tree.");
if (p_parser.is_tool()) {
push_line("@tool");
}
if (!p_parser.get_tree()->icon_path.empty()) {
push_text(R"(@icon (")");
push_text(p_parser.get_tree()->icon_path);
push_line("\")");
}
print_class(p_parser.get_tree());
print_line(printed);
}
#endif // DEBUG_ENABLED
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