mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-15 04:31:49 +08:00
3232fabd2d
This removes the few remaining cleanups in the Rust language code. The main difficulty here was that the earlier code allocated VEC heads on an obstack. The new code instead introduces an object that allocates and maintains the storage for whatever vectors are needed during the parse. Regression tested on the buildbot. ChangeLog 2017-08-05 Tom Tromey <tom@tromey.com> * rust-exp.y (rust_op_ptr, set_field): Remove typedefs. (rust_op_vector, rust_set_vector): New typedefs. (current_parser): New global. (work_obstack): Change to pointer type. Update all users. (rust_ast, pstate): Remove globals. (struct rust_parser): New. (%union) <params, field_inits>: Change type. (start, tuple_expr, unit_expr, struct_expr_list, literal) (field_expr, expr_list, maybe_expr_list, type_list): Update. (ast_call_ish, ast_path, ast_function_type, ast_tuple_type) (convert_params_to_types, convert_params_to_expression): Change type of "params". (ast_string): Change type of "fields". (rust_parse): Make a rust_parser. Remove cleanups. (rust_lex_tests): Make and install an auto_obstack.
2787 lines
68 KiB
Plaintext
2787 lines
68 KiB
Plaintext
/* Bison parser for Rust expressions, for GDB.
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Copyright (C) 2016-2017 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
|
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the Free Software Foundation; either version 3 of the License, or
|
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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/* Removing the last conflict seems difficult. */
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%expect 1
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%{
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#include "defs.h"
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#include "block.h"
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#include "charset.h"
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#include "cp-support.h"
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#include "gdb_obstack.h"
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#include "gdb_regex.h"
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#include "rust-lang.h"
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#include "parser-defs.h"
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#include "selftest.h"
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#include "value.h"
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#include "vec.h"
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#define GDB_YY_REMAP_PREFIX rust
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#include "yy-remap.h"
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#define RUSTSTYPE YYSTYPE
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extern initialize_file_ftype _initialize_rust_exp;
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struct rust_op;
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typedef std::vector<const struct rust_op *> rust_op_vector;
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/* A typed integer constant. */
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struct typed_val_int
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{
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LONGEST val;
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struct type *type;
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};
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/* A typed floating point constant. */
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struct typed_val_float
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{
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DOUBLEST dval;
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struct type *type;
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};
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/* An identifier and an expression. This is used to represent one
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element of a struct initializer. */
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struct set_field
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{
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struct stoken name;
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const struct rust_op *init;
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};
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typedef std::vector<set_field> rust_set_vector;
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static int rustyylex (void);
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static void rust_push_back (char c);
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static const char *rust_copy_name (const char *, int);
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static struct stoken rust_concat3 (const char *, const char *, const char *);
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static struct stoken make_stoken (const char *);
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static struct block_symbol rust_lookup_symbol (const char *name,
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const struct block *block,
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const domain_enum domain);
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static struct type *rust_lookup_type (const char *name,
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const struct block *block);
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static struct type *rust_type (const char *name);
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static const struct rust_op *crate_name (const struct rust_op *name);
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static const struct rust_op *super_name (const struct rust_op *name,
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unsigned int n_supers);
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static const struct rust_op *ast_operation (enum exp_opcode opcode,
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const struct rust_op *left,
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const struct rust_op *right);
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static const struct rust_op *ast_compound_assignment
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(enum exp_opcode opcode, const struct rust_op *left,
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const struct rust_op *rust_op);
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static const struct rust_op *ast_literal (struct typed_val_int val);
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static const struct rust_op *ast_dliteral (struct typed_val_float val);
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static const struct rust_op *ast_structop (const struct rust_op *left,
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const char *name,
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int completing);
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static const struct rust_op *ast_structop_anonymous
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(const struct rust_op *left, struct typed_val_int number);
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static const struct rust_op *ast_unary (enum exp_opcode opcode,
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const struct rust_op *expr);
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static const struct rust_op *ast_cast (const struct rust_op *expr,
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const struct rust_op *type);
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static const struct rust_op *ast_call_ish (enum exp_opcode opcode,
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const struct rust_op *expr,
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rust_op_vector *params);
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static const struct rust_op *ast_path (struct stoken name,
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rust_op_vector *params);
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static const struct rust_op *ast_string (struct stoken str);
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static const struct rust_op *ast_struct (const struct rust_op *name,
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rust_set_vector *fields);
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static const struct rust_op *ast_range (const struct rust_op *lhs,
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const struct rust_op *rhs);
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static const struct rust_op *ast_array_type (const struct rust_op *lhs,
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struct typed_val_int val);
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static const struct rust_op *ast_slice_type (const struct rust_op *type);
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static const struct rust_op *ast_reference_type (const struct rust_op *type);
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static const struct rust_op *ast_pointer_type (const struct rust_op *type,
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int is_mut);
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static const struct rust_op *ast_function_type (const struct rust_op *result,
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rust_op_vector *params);
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static const struct rust_op *ast_tuple_type (rust_op_vector *params);
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/* The current rust parser. */
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struct rust_parser;
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static rust_parser *current_parser;
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/* A regular expression for matching Rust numbers. This is split up
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since it is very long and this gives us a way to comment the
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sections. */
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static const char *number_regex_text =
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/* subexpression 1: allows use of alternation, otherwise uninteresting */
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"^("
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/* First comes floating point. */
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/* Recognize number after the decimal point, with optional
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exponent and optional type suffix.
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subexpression 2: allows "?", otherwise uninteresting
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subexpression 3: if present, type suffix
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*/
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"[0-9][0-9_]*\\.[0-9][0-9_]*([eE][-+]?[0-9][0-9_]*)?(f32|f64)?"
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#define FLOAT_TYPE1 3
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"|"
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/* Recognize exponent without decimal point, with optional type
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suffix.
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subexpression 4: if present, type suffix
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*/
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#define FLOAT_TYPE2 4
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"[0-9][0-9_]*[eE][-+]?[0-9][0-9_]*(f32|f64)?"
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"|"
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/* "23." is a valid floating point number, but "23.e5" and
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"23.f32" are not. So, handle the trailing-. case
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separately. */
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"[0-9][0-9_]*\\."
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"|"
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/* Finally come integers.
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subexpression 5: text of integer
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subexpression 6: if present, type suffix
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subexpression 7: allows use of alternation, otherwise uninteresting
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*/
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#define INT_TEXT 5
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#define INT_TYPE 6
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"(0x[a-fA-F0-9_]+|0o[0-7_]+|0b[01_]+|[0-9][0-9_]*)"
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"([iu](size|8|16|32|64))?"
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")";
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/* The number of subexpressions to allocate space for, including the
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"0th" whole match subexpression. */
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#define NUM_SUBEXPRESSIONS 8
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/* The compiled number-matching regex. */
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static regex_t number_regex;
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/* True if we're running unit tests. */
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static int unit_testing;
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/* Obstack for data temporarily allocated during parsing. Points to
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the obstack in the rust_parser, or to a temporary obstack during
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unit testing. */
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static auto_obstack *work_obstack;
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/* An instance of this is created before parsing, and destroyed when
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parsing is finished. */
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struct rust_parser
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{
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rust_parser (struct parser_state *state)
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: rust_ast (nullptr),
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pstate (state)
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{
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gdb_assert (current_parser == nullptr);
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current_parser = this;
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work_obstack = &obstack;
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}
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~rust_parser ()
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{
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/* Clean up the globals we set. */
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current_parser = nullptr;
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work_obstack = nullptr;
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}
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/* Create a new rust_set_vector. The storage for the new vector is
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managed by this class. */
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rust_set_vector *new_set_vector ()
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{
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rust_set_vector *result = new rust_set_vector;
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set_vectors.push_back (std::unique_ptr<rust_set_vector> (result));
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return result;
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}
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/* Create a new rust_ops_vector. The storage for the new vector is
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managed by this class. */
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rust_op_vector *new_op_vector ()
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{
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rust_op_vector *result = new rust_op_vector;
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op_vectors.push_back (std::unique_ptr<rust_op_vector> (result));
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return result;
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}
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/* Return the parser's language. */
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const struct language_defn *language () const
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{
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return parse_language (pstate);
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}
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/* Return the parser's gdbarch. */
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struct gdbarch *arch () const
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{
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return parse_gdbarch (pstate);
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}
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/* A pointer to this is installed globally. */
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auto_obstack obstack;
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/* Result of parsing. Points into obstack. */
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const struct rust_op *rust_ast;
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/* This keeps track of the various vectors we allocate. */
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std::vector<std::unique_ptr<rust_set_vector>> set_vectors;
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std::vector<std::unique_ptr<rust_op_vector>> op_vectors;
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/* The parser state gdb gave us. */
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struct parser_state *pstate;
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};
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%}
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%union
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{
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/* A typed integer constant. */
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struct typed_val_int typed_val_int;
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/* A typed floating point constant. */
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struct typed_val_float typed_val_float;
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/* An identifier or string. */
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struct stoken sval;
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/* A token representing an opcode, like "==". */
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enum exp_opcode opcode;
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/* A list of expressions; for example, the arguments to a function
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call. */
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rust_op_vector *params;
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/* A list of field initializers. */
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rust_set_vector *field_inits;
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/* A single field initializer. */
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struct set_field one_field_init;
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/* An expression. */
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const struct rust_op *op;
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/* A plain integer, for example used to count the number of
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"super::" prefixes on a path. */
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unsigned int depth;
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}
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%{
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/* Rust AST operations. We build a tree of these; then lower them
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to gdb expressions when parsing has completed. */
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struct rust_op
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{
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/* The opcode. */
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enum exp_opcode opcode;
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/* If OPCODE is OP_TYPE, then this holds information about what type
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is described by this node. */
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enum type_code typecode;
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/* Indicates whether OPCODE actually represents a compound
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assignment. For example, if OPCODE is GTGT and this is false,
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then this rust_op represents an ordinary ">>"; but if this is
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true, then this rust_op represents ">>=". Unused in other
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cases. */
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unsigned int compound_assignment : 1;
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/* Only used by a field expression; if set, indicates that the field
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name occurred at the end of the expression and is eligible for
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completion. */
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unsigned int completing : 1;
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/* Operands of expression. Which one is used and how depends on the
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particular opcode. */
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RUSTSTYPE left;
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RUSTSTYPE right;
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};
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%}
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%token <sval> GDBVAR
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%token <sval> IDENT
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%token <sval> COMPLETE
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%token <typed_val_int> INTEGER
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%token <typed_val_int> DECIMAL_INTEGER
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%token <sval> STRING
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%token <sval> BYTESTRING
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%token <typed_val_float> FLOAT
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%token <opcode> COMPOUND_ASSIGN
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/* Keyword tokens. */
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%token <voidval> KW_AS
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%token <voidval> KW_IF
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%token <voidval> KW_TRUE
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%token <voidval> KW_FALSE
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%token <voidval> KW_SUPER
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%token <voidval> KW_SELF
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%token <voidval> KW_MUT
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%token <voidval> KW_EXTERN
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%token <voidval> KW_CONST
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%token <voidval> KW_FN
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%token <voidval> KW_SIZEOF
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/* Operator tokens. */
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%token <voidval> DOTDOT
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%token <voidval> OROR
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%token <voidval> ANDAND
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%token <voidval> EQEQ
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%token <voidval> NOTEQ
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%token <voidval> LTEQ
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%token <voidval> GTEQ
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%token <voidval> LSH RSH
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%token <voidval> COLONCOLON
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%token <voidval> ARROW
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%type <op> type
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%type <op> path_for_expr
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%type <op> identifier_path_for_expr
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%type <op> path_for_type
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%type <op> identifier_path_for_type
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%type <op> just_identifiers_for_type
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%type <params> maybe_type_list
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%type <params> type_list
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%type <depth> super_path
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%type <op> literal
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%type <op> expr
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%type <op> field_expr
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%type <op> idx_expr
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%type <op> unop_expr
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%type <op> binop_expr
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%type <op> binop_expr_expr
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%type <op> type_cast_expr
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%type <op> assignment_expr
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%type <op> compound_assignment_expr
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%type <op> paren_expr
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%type <op> call_expr
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%type <op> path_expr
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%type <op> tuple_expr
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%type <op> unit_expr
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%type <op> struct_expr
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%type <op> array_expr
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%type <op> range_expr
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%type <params> expr_list
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%type <params> maybe_expr_list
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%type <params> paren_expr_list
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%type <field_inits> struct_expr_list
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%type <one_field_init> struct_expr_tail
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/* Precedence. */
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%nonassoc DOTDOT
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%right '=' COMPOUND_ASSIGN
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%left OROR
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%left ANDAND
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%nonassoc EQEQ NOTEQ '<' '>' LTEQ GTEQ
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%left '|'
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%left '^'
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%left '&'
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%left LSH RSH
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%left '@'
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%left '+' '-'
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%left '*' '/' '%'
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/* These could be %precedence in Bison, but that isn't a yacc
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feature. */
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%left KW_AS
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%left UNARY
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%left '[' '.' '('
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%%
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start:
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expr
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{
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/* If we are completing and see a valid parse,
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rust_ast will already have been set. */
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if (current_parser->rust_ast == NULL)
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current_parser->rust_ast = $1;
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}
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;
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/* Note that the Rust grammar includes a method_call_expr, but we
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handle this differently, to avoid a shift/reduce conflict with
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call_expr. */
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expr:
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literal
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| path_expr
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| tuple_expr
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| unit_expr
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| struct_expr
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||
| field_expr
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| array_expr
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| idx_expr
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||
| range_expr
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||
| unop_expr /* Must precede call_expr because of ambiguity with sizeof. */
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| binop_expr
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| paren_expr
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| call_expr
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;
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tuple_expr:
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'(' expr ',' maybe_expr_list ')'
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{
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$4->push_back ($2);
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error (_("Tuple expressions not supported yet"));
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}
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;
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unit_expr:
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'(' ')'
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||
{
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struct typed_val_int val;
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||
|
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val.type
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||
= language_lookup_primitive_type (current_parser->language (),
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||
current_parser->arch (),
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||
"()");
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||
val.val = 0;
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||
$$ = ast_literal (val);
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||
}
|
||
;
|
||
|
||
/* To avoid a shift/reduce conflict with call_expr, we don't handle
|
||
tuple struct expressions here, but instead when examining the
|
||
AST. */
|
||
struct_expr:
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path_for_expr '{' struct_expr_list '}'
|
||
{ $$ = ast_struct ($1, $3); }
|
||
;
|
||
|
||
struct_expr_tail:
|
||
DOTDOT expr
|
||
{
|
||
struct set_field sf;
|
||
|
||
sf.name.ptr = NULL;
|
||
sf.name.length = 0;
|
||
sf.init = $2;
|
||
|
||
$$ = sf;
|
||
}
|
||
| IDENT ':' expr
|
||
{
|
||
struct set_field sf;
|
||
|
||
sf.name = $1;
|
||
sf.init = $3;
|
||
$$ = sf;
|
||
}
|
||
;
|
||
|
||
struct_expr_list:
|
||
/* %empty */
|
||
{
|
||
$$ = current_parser->new_set_vector ();
|
||
}
|
||
| struct_expr_tail
|
||
{
|
||
rust_set_vector *result = current_parser->new_set_vector ();
|
||
result->push_back ($1);
|
||
$$ = result;
|
||
}
|
||
| IDENT ':' expr ',' struct_expr_list
|
||
{
|
||
struct set_field sf;
|
||
|
||
sf.name = $1;
|
||
sf.init = $3;
|
||
$5->push_back (sf);
|
||
$$ = $5;
|
||
}
|
||
;
|
||
|
||
array_expr:
|
||
'[' KW_MUT expr_list ']'
|
||
{ $$ = ast_call_ish (OP_ARRAY, NULL, $3); }
|
||
| '[' expr_list ']'
|
||
{ $$ = ast_call_ish (OP_ARRAY, NULL, $2); }
|
||
| '[' KW_MUT expr ';' expr ']'
|
||
{ $$ = ast_operation (OP_RUST_ARRAY, $3, $5); }
|
||
| '[' expr ';' expr ']'
|
||
{ $$ = ast_operation (OP_RUST_ARRAY, $2, $4); }
|
||
;
|
||
|
||
range_expr:
|
||
expr DOTDOT
|
||
{ $$ = ast_range ($1, NULL); }
|
||
| expr DOTDOT expr
|
||
{ $$ = ast_range ($1, $3); }
|
||
| DOTDOT expr
|
||
{ $$ = ast_range (NULL, $2); }
|
||
| DOTDOT
|
||
{ $$ = ast_range (NULL, NULL); }
|
||
;
|
||
|
||
literal:
|
||
INTEGER
|
||
{ $$ = ast_literal ($1); }
|
||
| DECIMAL_INTEGER
|
||
{ $$ = ast_literal ($1); }
|
||
| FLOAT
|
||
{ $$ = ast_dliteral ($1); }
|
||
| STRING
|
||
{
|
||
const struct rust_op *str = ast_string ($1);
|
||
struct set_field field;
|
||
struct typed_val_int val;
|
||
struct stoken token;
|
||
|
||
rust_set_vector *fields = current_parser->new_set_vector ();
|
||
|
||
/* Wrap the raw string in the &str struct. */
|
||
field.name.ptr = "data_ptr";
|
||
field.name.length = strlen (field.name.ptr);
|
||
field.init = ast_unary (UNOP_ADDR, ast_string ($1));
|
||
fields->push_back (field);
|
||
|
||
val.type = rust_type ("usize");
|
||
val.val = $1.length;
|
||
|
||
field.name.ptr = "length";
|
||
field.name.length = strlen (field.name.ptr);
|
||
field.init = ast_literal (val);
|
||
fields->push_back (field);
|
||
|
||
token.ptr = "&str";
|
||
token.length = strlen (token.ptr);
|
||
$$ = ast_struct (ast_path (token, NULL), fields);
|
||
}
|
||
| BYTESTRING
|
||
{ $$ = ast_string ($1); }
|
||
| KW_TRUE
|
||
{
|
||
struct typed_val_int val;
|
||
|
||
val.type = language_bool_type (current_parser->language (),
|
||
current_parser->arch ());
|
||
val.val = 1;
|
||
$$ = ast_literal (val);
|
||
}
|
||
| KW_FALSE
|
||
{
|
||
struct typed_val_int val;
|
||
|
||
val.type = language_bool_type (current_parser->language (),
|
||
current_parser->arch ());
|
||
val.val = 0;
|
||
$$ = ast_literal (val);
|
||
}
|
||
;
|
||
|
||
field_expr:
|
||
expr '.' IDENT
|
||
{ $$ = ast_structop ($1, $3.ptr, 0); }
|
||
| expr '.' COMPLETE
|
||
{
|
||
$$ = ast_structop ($1, $3.ptr, 1);
|
||
current_parser->rust_ast = $$;
|
||
}
|
||
| expr '.' DECIMAL_INTEGER
|
||
{ $$ = ast_structop_anonymous ($1, $3); }
|
||
;
|
||
|
||
idx_expr:
|
||
expr '[' expr ']'
|
||
{ $$ = ast_operation (BINOP_SUBSCRIPT, $1, $3); }
|
||
;
|
||
|
||
unop_expr:
|
||
'+' expr %prec UNARY
|
||
{ $$ = ast_unary (UNOP_PLUS, $2); }
|
||
|
||
| '-' expr %prec UNARY
|
||
{ $$ = ast_unary (UNOP_NEG, $2); }
|
||
|
||
| '!' expr %prec UNARY
|
||
{
|
||
/* Note that we provide a Rust-specific evaluator
|
||
override for UNOP_COMPLEMENT, so it can do the
|
||
right thing for both bool and integral
|
||
values. */
|
||
$$ = ast_unary (UNOP_COMPLEMENT, $2);
|
||
}
|
||
|
||
| '*' expr %prec UNARY
|
||
{ $$ = ast_unary (UNOP_IND, $2); }
|
||
|
||
| '&' expr %prec UNARY
|
||
{ $$ = ast_unary (UNOP_ADDR, $2); }
|
||
|
||
| '&' KW_MUT expr %prec UNARY
|
||
{ $$ = ast_unary (UNOP_ADDR, $3); }
|
||
| KW_SIZEOF '(' expr ')' %prec UNARY
|
||
{ $$ = ast_unary (UNOP_SIZEOF, $3); }
|
||
;
|
||
|
||
binop_expr:
|
||
binop_expr_expr
|
||
| type_cast_expr
|
||
| assignment_expr
|
||
| compound_assignment_expr
|
||
;
|
||
|
||
binop_expr_expr:
|
||
expr '*' expr
|
||
{ $$ = ast_operation (BINOP_MUL, $1, $3); }
|
||
|
||
| expr '@' expr
|
||
{ $$ = ast_operation (BINOP_REPEAT, $1, $3); }
|
||
|
||
| expr '/' expr
|
||
{ $$ = ast_operation (BINOP_DIV, $1, $3); }
|
||
|
||
| expr '%' expr
|
||
{ $$ = ast_operation (BINOP_REM, $1, $3); }
|
||
|
||
| expr '<' expr
|
||
{ $$ = ast_operation (BINOP_LESS, $1, $3); }
|
||
|
||
| expr '>' expr
|
||
{ $$ = ast_operation (BINOP_GTR, $1, $3); }
|
||
|
||
| expr '&' expr
|
||
{ $$ = ast_operation (BINOP_BITWISE_AND, $1, $3); }
|
||
|
||
| expr '|' expr
|
||
{ $$ = ast_operation (BINOP_BITWISE_IOR, $1, $3); }
|
||
|
||
| expr '^' expr
|
||
{ $$ = ast_operation (BINOP_BITWISE_XOR, $1, $3); }
|
||
|
||
| expr '+' expr
|
||
{ $$ = ast_operation (BINOP_ADD, $1, $3); }
|
||
|
||
| expr '-' expr
|
||
{ $$ = ast_operation (BINOP_SUB, $1, $3); }
|
||
|
||
| expr OROR expr
|
||
{ $$ = ast_operation (BINOP_LOGICAL_OR, $1, $3); }
|
||
|
||
| expr ANDAND expr
|
||
{ $$ = ast_operation (BINOP_LOGICAL_AND, $1, $3); }
|
||
|
||
| expr EQEQ expr
|
||
{ $$ = ast_operation (BINOP_EQUAL, $1, $3); }
|
||
|
||
| expr NOTEQ expr
|
||
{ $$ = ast_operation (BINOP_NOTEQUAL, $1, $3); }
|
||
|
||
| expr LTEQ expr
|
||
{ $$ = ast_operation (BINOP_LEQ, $1, $3); }
|
||
|
||
| expr GTEQ expr
|
||
{ $$ = ast_operation (BINOP_GEQ, $1, $3); }
|
||
|
||
| expr LSH expr
|
||
{ $$ = ast_operation (BINOP_LSH, $1, $3); }
|
||
|
||
| expr RSH expr
|
||
{ $$ = ast_operation (BINOP_RSH, $1, $3); }
|
||
;
|
||
|
||
type_cast_expr:
|
||
expr KW_AS type
|
||
{ $$ = ast_cast ($1, $3); }
|
||
;
|
||
|
||
assignment_expr:
|
||
expr '=' expr
|
||
{ $$ = ast_operation (BINOP_ASSIGN, $1, $3); }
|
||
;
|
||
|
||
compound_assignment_expr:
|
||
expr COMPOUND_ASSIGN expr
|
||
{ $$ = ast_compound_assignment ($2, $1, $3); }
|
||
|
||
;
|
||
|
||
paren_expr:
|
||
'(' expr ')'
|
||
{ $$ = $2; }
|
||
;
|
||
|
||
expr_list:
|
||
expr
|
||
{
|
||
$$ = current_parser->new_op_vector ();
|
||
$$->push_back ($1);
|
||
}
|
||
| expr_list ',' expr
|
||
{
|
||
$1->push_back ($3);
|
||
$$ = $1;
|
||
}
|
||
;
|
||
|
||
maybe_expr_list:
|
||
/* %empty */
|
||
{
|
||
/* The result can't be NULL. */
|
||
$$ = current_parser->new_op_vector ();
|
||
}
|
||
| expr_list
|
||
{ $$ = $1; }
|
||
;
|
||
|
||
paren_expr_list:
|
||
'('
|
||
maybe_expr_list
|
||
')'
|
||
{ $$ = $2; }
|
||
;
|
||
|
||
call_expr:
|
||
expr paren_expr_list
|
||
{ $$ = ast_call_ish (OP_FUNCALL, $1, $2); }
|
||
;
|
||
|
||
maybe_self_path:
|
||
/* %empty */
|
||
| KW_SELF COLONCOLON
|
||
;
|
||
|
||
super_path:
|
||
KW_SUPER COLONCOLON
|
||
{ $$ = 1; }
|
||
| super_path KW_SUPER COLONCOLON
|
||
{ $$ = $1 + 1; }
|
||
;
|
||
|
||
path_expr:
|
||
path_for_expr
|
||
{ $$ = $1; }
|
||
| GDBVAR
|
||
{ $$ = ast_path ($1, NULL); }
|
||
| KW_SELF
|
||
{ $$ = ast_path (make_stoken ("self"), NULL); }
|
||
;
|
||
|
||
path_for_expr:
|
||
identifier_path_for_expr
|
||
| KW_SELF COLONCOLON identifier_path_for_expr
|
||
{ $$ = super_name ($3, 0); }
|
||
| maybe_self_path super_path identifier_path_for_expr
|
||
{ $$ = super_name ($3, $2); }
|
||
| COLONCOLON identifier_path_for_expr
|
||
{ $$ = crate_name ($2); }
|
||
| KW_EXTERN identifier_path_for_expr
|
||
{
|
||
/* This is a gdb extension to make it possible to
|
||
refer to items in other crates. It just bypasses
|
||
adding the current crate to the front of the
|
||
name. */
|
||
$$ = ast_path (rust_concat3 ("::", $2->left.sval.ptr, NULL),
|
||
$2->right.params);
|
||
}
|
||
;
|
||
|
||
identifier_path_for_expr:
|
||
IDENT
|
||
{ $$ = ast_path ($1, NULL); }
|
||
| identifier_path_for_expr COLONCOLON IDENT
|
||
{
|
||
$$ = ast_path (rust_concat3 ($1->left.sval.ptr, "::",
|
||
$3.ptr),
|
||
NULL);
|
||
}
|
||
| identifier_path_for_expr COLONCOLON '<' type_list '>'
|
||
{ $$ = ast_path ($1->left.sval, $4); }
|
||
| identifier_path_for_expr COLONCOLON '<' type_list RSH
|
||
{
|
||
$$ = ast_path ($1->left.sval, $4);
|
||
rust_push_back ('>');
|
||
}
|
||
;
|
||
|
||
path_for_type:
|
||
identifier_path_for_type
|
||
| KW_SELF COLONCOLON identifier_path_for_type
|
||
{ $$ = super_name ($3, 0); }
|
||
| maybe_self_path super_path identifier_path_for_type
|
||
{ $$ = super_name ($3, $2); }
|
||
| COLONCOLON identifier_path_for_type
|
||
{ $$ = crate_name ($2); }
|
||
| KW_EXTERN identifier_path_for_type
|
||
{
|
||
/* This is a gdb extension to make it possible to
|
||
refer to items in other crates. It just bypasses
|
||
adding the current crate to the front of the
|
||
name. */
|
||
$$ = ast_path (rust_concat3 ("::", $2->left.sval.ptr, NULL),
|
||
$2->right.params);
|
||
}
|
||
;
|
||
|
||
just_identifiers_for_type:
|
||
IDENT
|
||
{ $$ = ast_path ($1, NULL); }
|
||
| just_identifiers_for_type COLONCOLON IDENT
|
||
{
|
||
$$ = ast_path (rust_concat3 ($1->left.sval.ptr, "::",
|
||
$3.ptr),
|
||
NULL);
|
||
}
|
||
;
|
||
|
||
identifier_path_for_type:
|
||
just_identifiers_for_type
|
||
| just_identifiers_for_type '<' type_list '>'
|
||
{ $$ = ast_path ($1->left.sval, $3); }
|
||
| just_identifiers_for_type '<' type_list RSH
|
||
{
|
||
$$ = ast_path ($1->left.sval, $3);
|
||
rust_push_back ('>');
|
||
}
|
||
;
|
||
|
||
type:
|
||
path_for_type
|
||
| '[' type ';' INTEGER ']'
|
||
{ $$ = ast_array_type ($2, $4); }
|
||
| '[' type ';' DECIMAL_INTEGER ']'
|
||
{ $$ = ast_array_type ($2, $4); }
|
||
| '&' '[' type ']'
|
||
{ $$ = ast_slice_type ($3); }
|
||
| '&' type
|
||
{ $$ = ast_reference_type ($2); }
|
||
| '*' KW_MUT type
|
||
{ $$ = ast_pointer_type ($3, 1); }
|
||
| '*' KW_CONST type
|
||
{ $$ = ast_pointer_type ($3, 0); }
|
||
| KW_FN '(' maybe_type_list ')' ARROW type
|
||
{ $$ = ast_function_type ($6, $3); }
|
||
| '(' maybe_type_list ')'
|
||
{ $$ = ast_tuple_type ($2); }
|
||
;
|
||
|
||
maybe_type_list:
|
||
/* %empty */
|
||
{ $$ = NULL; }
|
||
| type_list
|
||
{ $$ = $1; }
|
||
;
|
||
|
||
type_list:
|
||
type
|
||
{
|
||
rust_op_vector *result = current_parser->new_op_vector ();
|
||
result->push_back ($1);
|
||
$$ = result;
|
||
}
|
||
| type_list ',' type
|
||
{
|
||
$1->push_back ($3);
|
||
$$ = $1;
|
||
}
|
||
;
|
||
|
||
%%
|
||
|
||
/* A struct of this type is used to describe a token. */
|
||
|
||
struct token_info
|
||
{
|
||
const char *name;
|
||
int value;
|
||
enum exp_opcode opcode;
|
||
};
|
||
|
||
/* Identifier tokens. */
|
||
|
||
static const struct token_info identifier_tokens[] =
|
||
{
|
||
{ "as", KW_AS, OP_NULL },
|
||
{ "false", KW_FALSE, OP_NULL },
|
||
{ "if", 0, OP_NULL },
|
||
{ "mut", KW_MUT, OP_NULL },
|
||
{ "const", KW_CONST, OP_NULL },
|
||
{ "self", KW_SELF, OP_NULL },
|
||
{ "super", KW_SUPER, OP_NULL },
|
||
{ "true", KW_TRUE, OP_NULL },
|
||
{ "extern", KW_EXTERN, OP_NULL },
|
||
{ "fn", KW_FN, OP_NULL },
|
||
{ "sizeof", KW_SIZEOF, OP_NULL },
|
||
};
|
||
|
||
/* Operator tokens, sorted longest first. */
|
||
|
||
static const struct token_info operator_tokens[] =
|
||
{
|
||
{ ">>=", COMPOUND_ASSIGN, BINOP_RSH },
|
||
{ "<<=", COMPOUND_ASSIGN, BINOP_LSH },
|
||
|
||
{ "<<", LSH, OP_NULL },
|
||
{ ">>", RSH, OP_NULL },
|
||
{ "&&", ANDAND, OP_NULL },
|
||
{ "||", OROR, OP_NULL },
|
||
{ "==", EQEQ, OP_NULL },
|
||
{ "!=", NOTEQ, OP_NULL },
|
||
{ "<=", LTEQ, OP_NULL },
|
||
{ ">=", GTEQ, OP_NULL },
|
||
{ "+=", COMPOUND_ASSIGN, BINOP_ADD },
|
||
{ "-=", COMPOUND_ASSIGN, BINOP_SUB },
|
||
{ "*=", COMPOUND_ASSIGN, BINOP_MUL },
|
||
{ "/=", COMPOUND_ASSIGN, BINOP_DIV },
|
||
{ "%=", COMPOUND_ASSIGN, BINOP_REM },
|
||
{ "&=", COMPOUND_ASSIGN, BINOP_BITWISE_AND },
|
||
{ "|=", COMPOUND_ASSIGN, BINOP_BITWISE_IOR },
|
||
{ "^=", COMPOUND_ASSIGN, BINOP_BITWISE_XOR },
|
||
|
||
{ "::", COLONCOLON, OP_NULL },
|
||
{ "..", DOTDOT, OP_NULL },
|
||
{ "->", ARROW, OP_NULL }
|
||
};
|
||
|
||
/* Helper function to copy to the name obstack. */
|
||
|
||
static const char *
|
||
rust_copy_name (const char *name, int len)
|
||
{
|
||
return (const char *) obstack_copy0 (work_obstack, name, len);
|
||
}
|
||
|
||
/* Helper function to make an stoken from a C string. */
|
||
|
||
static struct stoken
|
||
make_stoken (const char *p)
|
||
{
|
||
struct stoken result;
|
||
|
||
result.ptr = p;
|
||
result.length = strlen (result.ptr);
|
||
return result;
|
||
}
|
||
|
||
/* Helper function to concatenate three strings on the name
|
||
obstack. */
|
||
|
||
static struct stoken
|
||
rust_concat3 (const char *s1, const char *s2, const char *s3)
|
||
{
|
||
return make_stoken (obconcat (work_obstack, s1, s2, s3, (char *) NULL));
|
||
}
|
||
|
||
/* Return an AST node referring to NAME, but relative to the crate's
|
||
name. */
|
||
|
||
static const struct rust_op *
|
||
crate_name (const struct rust_op *name)
|
||
{
|
||
std::string crate = rust_crate_for_block (expression_context_block);
|
||
struct stoken result;
|
||
|
||
gdb_assert (name->opcode == OP_VAR_VALUE);
|
||
|
||
if (crate.empty ())
|
||
error (_("Could not find crate for current location"));
|
||
result = make_stoken (obconcat (work_obstack, "::", crate.c_str (), "::",
|
||
name->left.sval.ptr, (char *) NULL));
|
||
|
||
return ast_path (result, name->right.params);
|
||
}
|
||
|
||
/* Create an AST node referring to a "super::" qualified name. IDENT
|
||
is the base name and N_SUPERS is how many "super::"s were
|
||
provided. N_SUPERS can be zero. */
|
||
|
||
static const struct rust_op *
|
||
super_name (const struct rust_op *ident, unsigned int n_supers)
|
||
{
|
||
const char *scope = block_scope (expression_context_block);
|
||
int offset;
|
||
|
||
gdb_assert (ident->opcode == OP_VAR_VALUE);
|
||
|
||
if (scope[0] == '\0')
|
||
error (_("Couldn't find namespace scope for self::"));
|
||
|
||
if (n_supers > 0)
|
||
{
|
||
int i;
|
||
int len;
|
||
std::vector<int> offsets;
|
||
unsigned int current_len;
|
||
|
||
current_len = cp_find_first_component (scope);
|
||
while (scope[current_len] != '\0')
|
||
{
|
||
offsets.push_back (current_len);
|
||
gdb_assert (scope[current_len] == ':');
|
||
/* The "::". */
|
||
current_len += 2;
|
||
current_len += cp_find_first_component (scope
|
||
+ current_len);
|
||
}
|
||
|
||
len = offsets.size ();
|
||
if (n_supers >= len)
|
||
error (_("Too many super:: uses from '%s'"), scope);
|
||
|
||
offset = offsets[len - n_supers];
|
||
}
|
||
else
|
||
offset = strlen (scope);
|
||
|
||
obstack_grow (work_obstack, "::", 2);
|
||
obstack_grow (work_obstack, scope, offset);
|
||
obstack_grow (work_obstack, "::", 2);
|
||
obstack_grow0 (work_obstack, ident->left.sval.ptr, ident->left.sval.length);
|
||
|
||
return ast_path (make_stoken ((const char *) obstack_finish (work_obstack)),
|
||
ident->right.params);
|
||
}
|
||
|
||
/* A helper that updates innermost_block as appropriate. */
|
||
|
||
static void
|
||
update_innermost_block (struct block_symbol sym)
|
||
{
|
||
if (symbol_read_needs_frame (sym.symbol)
|
||
&& (innermost_block == NULL
|
||
|| contained_in (sym.block, innermost_block)))
|
||
innermost_block = sym.block;
|
||
}
|
||
|
||
/* A helper to look up a Rust type, or fail. This only works for
|
||
types defined by rust_language_arch_info. */
|
||
|
||
static struct type *
|
||
rust_type (const char *name)
|
||
{
|
||
struct type *type;
|
||
|
||
/* When unit testing, we don't bother checking the types, so avoid a
|
||
possibly-failing lookup here. */
|
||
if (unit_testing)
|
||
return NULL;
|
||
|
||
type = language_lookup_primitive_type (current_parser->language (),
|
||
current_parser->arch (),
|
||
name);
|
||
if (type == NULL)
|
||
error (_("Could not find Rust type %s"), name);
|
||
return type;
|
||
}
|
||
|
||
/* Lex a hex number with at least MIN digits and at most MAX
|
||
digits. */
|
||
|
||
static uint32_t
|
||
lex_hex (int min, int max)
|
||
{
|
||
uint32_t result = 0;
|
||
int len = 0;
|
||
/* We only want to stop at MAX if we're lexing a byte escape. */
|
||
int check_max = min == max;
|
||
|
||
while ((check_max ? len <= max : 1)
|
||
&& ((lexptr[0] >= 'a' && lexptr[0] <= 'f')
|
||
|| (lexptr[0] >= 'A' && lexptr[0] <= 'F')
|
||
|| (lexptr[0] >= '0' && lexptr[0] <= '9')))
|
||
{
|
||
result *= 16;
|
||
if (lexptr[0] >= 'a' && lexptr[0] <= 'f')
|
||
result = result + 10 + lexptr[0] - 'a';
|
||
else if (lexptr[0] >= 'A' && lexptr[0] <= 'F')
|
||
result = result + 10 + lexptr[0] - 'A';
|
||
else
|
||
result = result + lexptr[0] - '0';
|
||
++lexptr;
|
||
++len;
|
||
}
|
||
|
||
if (len < min)
|
||
error (_("Not enough hex digits seen"));
|
||
if (len > max)
|
||
{
|
||
gdb_assert (min != max);
|
||
error (_("Overlong hex escape"));
|
||
}
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Lex an escape. IS_BYTE is true if we're lexing a byte escape;
|
||
otherwise we're lexing a character escape. */
|
||
|
||
static uint32_t
|
||
lex_escape (int is_byte)
|
||
{
|
||
uint32_t result;
|
||
|
||
gdb_assert (lexptr[0] == '\\');
|
||
++lexptr;
|
||
switch (lexptr[0])
|
||
{
|
||
case 'x':
|
||
++lexptr;
|
||
result = lex_hex (2, 2);
|
||
break;
|
||
|
||
case 'u':
|
||
if (is_byte)
|
||
error (_("Unicode escape in byte literal"));
|
||
++lexptr;
|
||
if (lexptr[0] != '{')
|
||
error (_("Missing '{' in Unicode escape"));
|
||
++lexptr;
|
||
result = lex_hex (1, 6);
|
||
/* Could do range checks here. */
|
||
if (lexptr[0] != '}')
|
||
error (_("Missing '}' in Unicode escape"));
|
||
++lexptr;
|
||
break;
|
||
|
||
case 'n':
|
||
result = '\n';
|
||
++lexptr;
|
||
break;
|
||
case 'r':
|
||
result = '\r';
|
||
++lexptr;
|
||
break;
|
||
case 't':
|
||
result = '\t';
|
||
++lexptr;
|
||
break;
|
||
case '\\':
|
||
result = '\\';
|
||
++lexptr;
|
||
break;
|
||
case '0':
|
||
result = '\0';
|
||
++lexptr;
|
||
break;
|
||
case '\'':
|
||
result = '\'';
|
||
++lexptr;
|
||
break;
|
||
case '"':
|
||
result = '"';
|
||
++lexptr;
|
||
break;
|
||
|
||
default:
|
||
error (_("Invalid escape \\%c in literal"), lexptr[0]);
|
||
}
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Lex a character constant. */
|
||
|
||
static int
|
||
lex_character (void)
|
||
{
|
||
int is_byte = 0;
|
||
uint32_t value;
|
||
|
||
if (lexptr[0] == 'b')
|
||
{
|
||
is_byte = 1;
|
||
++lexptr;
|
||
}
|
||
gdb_assert (lexptr[0] == '\'');
|
||
++lexptr;
|
||
/* This should handle UTF-8 here. */
|
||
if (lexptr[0] == '\\')
|
||
value = lex_escape (is_byte);
|
||
else
|
||
{
|
||
value = lexptr[0] & 0xff;
|
||
++lexptr;
|
||
}
|
||
|
||
if (lexptr[0] != '\'')
|
||
error (_("Unterminated character literal"));
|
||
++lexptr;
|
||
|
||
rustyylval.typed_val_int.val = value;
|
||
rustyylval.typed_val_int.type = rust_type (is_byte ? "u8" : "char");
|
||
|
||
return INTEGER;
|
||
}
|
||
|
||
/* Return the offset of the double quote if STR looks like the start
|
||
of a raw string, or 0 if STR does not start a raw string. */
|
||
|
||
static int
|
||
starts_raw_string (const char *str)
|
||
{
|
||
const char *save = str;
|
||
|
||
if (str[0] != 'r')
|
||
return 0;
|
||
++str;
|
||
while (str[0] == '#')
|
||
++str;
|
||
if (str[0] == '"')
|
||
return str - save;
|
||
return 0;
|
||
}
|
||
|
||
/* Return true if STR looks like the end of a raw string that had N
|
||
hashes at the start. */
|
||
|
||
static bool
|
||
ends_raw_string (const char *str, int n)
|
||
{
|
||
int i;
|
||
|
||
gdb_assert (str[0] == '"');
|
||
for (i = 0; i < n; ++i)
|
||
if (str[i + 1] != '#')
|
||
return false;
|
||
return true;
|
||
}
|
||
|
||
/* Lex a string constant. */
|
||
|
||
static int
|
||
lex_string (void)
|
||
{
|
||
int is_byte = lexptr[0] == 'b';
|
||
int raw_length;
|
||
int len_in_chars = 0;
|
||
|
||
if (is_byte)
|
||
++lexptr;
|
||
raw_length = starts_raw_string (lexptr);
|
||
lexptr += raw_length;
|
||
gdb_assert (lexptr[0] == '"');
|
||
++lexptr;
|
||
|
||
while (1)
|
||
{
|
||
uint32_t value;
|
||
|
||
if (raw_length > 0)
|
||
{
|
||
if (lexptr[0] == '"' && ends_raw_string (lexptr, raw_length - 1))
|
||
{
|
||
/* Exit with lexptr pointing after the final "#". */
|
||
lexptr += raw_length;
|
||
break;
|
||
}
|
||
else if (lexptr[0] == '\0')
|
||
error (_("Unexpected EOF in string"));
|
||
|
||
value = lexptr[0] & 0xff;
|
||
if (is_byte && value > 127)
|
||
error (_("Non-ASCII value in raw byte string"));
|
||
obstack_1grow (work_obstack, value);
|
||
|
||
++lexptr;
|
||
}
|
||
else if (lexptr[0] == '"')
|
||
{
|
||
/* Make sure to skip the quote. */
|
||
++lexptr;
|
||
break;
|
||
}
|
||
else if (lexptr[0] == '\\')
|
||
{
|
||
value = lex_escape (is_byte);
|
||
|
||
if (is_byte)
|
||
obstack_1grow (work_obstack, value);
|
||
else
|
||
convert_between_encodings ("UTF-32", "UTF-8", (gdb_byte *) &value,
|
||
sizeof (value), sizeof (value),
|
||
work_obstack, translit_none);
|
||
}
|
||
else if (lexptr[0] == '\0')
|
||
error (_("Unexpected EOF in string"));
|
||
else
|
||
{
|
||
value = lexptr[0] & 0xff;
|
||
if (is_byte && value > 127)
|
||
error (_("Non-ASCII value in byte string"));
|
||
obstack_1grow (work_obstack, value);
|
||
++lexptr;
|
||
}
|
||
}
|
||
|
||
rustyylval.sval.length = obstack_object_size (work_obstack);
|
||
rustyylval.sval.ptr = (const char *) obstack_finish (work_obstack);
|
||
return is_byte ? BYTESTRING : STRING;
|
||
}
|
||
|
||
/* Return true if STRING starts with whitespace followed by a digit. */
|
||
|
||
static bool
|
||
space_then_number (const char *string)
|
||
{
|
||
const char *p = string;
|
||
|
||
while (p[0] == ' ' || p[0] == '\t')
|
||
++p;
|
||
if (p == string)
|
||
return false;
|
||
|
||
return *p >= '0' && *p <= '9';
|
||
}
|
||
|
||
/* Return true if C can start an identifier. */
|
||
|
||
static bool
|
||
rust_identifier_start_p (char c)
|
||
{
|
||
return ((c >= 'a' && c <= 'z')
|
||
|| (c >= 'A' && c <= 'Z')
|
||
|| c == '_'
|
||
|| c == '$');
|
||
}
|
||
|
||
/* Lex an identifier. */
|
||
|
||
static int
|
||
lex_identifier (void)
|
||
{
|
||
const char *start = lexptr;
|
||
unsigned int length;
|
||
const struct token_info *token;
|
||
int i;
|
||
int is_gdb_var = lexptr[0] == '$';
|
||
|
||
gdb_assert (rust_identifier_start_p (lexptr[0]));
|
||
|
||
++lexptr;
|
||
|
||
/* For the time being this doesn't handle Unicode rules. Non-ASCII
|
||
identifiers are gated anyway. */
|
||
while ((lexptr[0] >= 'a' && lexptr[0] <= 'z')
|
||
|| (lexptr[0] >= 'A' && lexptr[0] <= 'Z')
|
||
|| lexptr[0] == '_'
|
||
|| (is_gdb_var && lexptr[0] == '$')
|
||
|| (lexptr[0] >= '0' && lexptr[0] <= '9'))
|
||
++lexptr;
|
||
|
||
|
||
length = lexptr - start;
|
||
token = NULL;
|
||
for (i = 0; i < ARRAY_SIZE (identifier_tokens); ++i)
|
||
{
|
||
if (length == strlen (identifier_tokens[i].name)
|
||
&& strncmp (identifier_tokens[i].name, start, length) == 0)
|
||
{
|
||
token = &identifier_tokens[i];
|
||
break;
|
||
}
|
||
}
|
||
|
||
if (token != NULL)
|
||
{
|
||
if (token->value == 0)
|
||
{
|
||
/* Leave the terminating token alone. */
|
||
lexptr = start;
|
||
return 0;
|
||
}
|
||
}
|
||
else if (token == NULL
|
||
&& (strncmp (start, "thread", length) == 0
|
||
|| strncmp (start, "task", length) == 0)
|
||
&& space_then_number (lexptr))
|
||
{
|
||
/* "task" or "thread" followed by a number terminates the
|
||
parse, per gdb rules. */
|
||
lexptr = start;
|
||
return 0;
|
||
}
|
||
|
||
if (token == NULL || (parse_completion && lexptr[0] == '\0'))
|
||
rustyylval.sval = make_stoken (rust_copy_name (start, length));
|
||
|
||
if (parse_completion && lexptr[0] == '\0')
|
||
{
|
||
/* Prevent rustyylex from returning two COMPLETE tokens. */
|
||
prev_lexptr = lexptr;
|
||
return COMPLETE;
|
||
}
|
||
|
||
if (token != NULL)
|
||
return token->value;
|
||
if (is_gdb_var)
|
||
return GDBVAR;
|
||
return IDENT;
|
||
}
|
||
|
||
/* Lex an operator. */
|
||
|
||
static int
|
||
lex_operator (void)
|
||
{
|
||
const struct token_info *token = NULL;
|
||
int i;
|
||
|
||
for (i = 0; i < ARRAY_SIZE (operator_tokens); ++i)
|
||
{
|
||
if (strncmp (operator_tokens[i].name, lexptr,
|
||
strlen (operator_tokens[i].name)) == 0)
|
||
{
|
||
lexptr += strlen (operator_tokens[i].name);
|
||
token = &operator_tokens[i];
|
||
break;
|
||
}
|
||
}
|
||
|
||
if (token != NULL)
|
||
{
|
||
rustyylval.opcode = token->opcode;
|
||
return token->value;
|
||
}
|
||
|
||
return *lexptr++;
|
||
}
|
||
|
||
/* Lex a number. */
|
||
|
||
static int
|
||
lex_number (void)
|
||
{
|
||
regmatch_t subexps[NUM_SUBEXPRESSIONS];
|
||
int match;
|
||
int is_integer = 0;
|
||
int could_be_decimal = 1;
|
||
int implicit_i32 = 0;
|
||
const char *type_name = NULL;
|
||
struct type *type;
|
||
int end_index;
|
||
int type_index = -1;
|
||
int i;
|
||
|
||
match = regexec (&number_regex, lexptr, ARRAY_SIZE (subexps), subexps, 0);
|
||
/* Failure means the regexp is broken. */
|
||
gdb_assert (match == 0);
|
||
|
||
if (subexps[INT_TEXT].rm_so != -1)
|
||
{
|
||
/* Integer part matched. */
|
||
is_integer = 1;
|
||
end_index = subexps[INT_TEXT].rm_eo;
|
||
if (subexps[INT_TYPE].rm_so == -1)
|
||
{
|
||
type_name = "i32";
|
||
implicit_i32 = 1;
|
||
}
|
||
else
|
||
{
|
||
type_index = INT_TYPE;
|
||
could_be_decimal = 0;
|
||
}
|
||
}
|
||
else if (subexps[FLOAT_TYPE1].rm_so != -1)
|
||
{
|
||
/* Found floating point type suffix. */
|
||
end_index = subexps[FLOAT_TYPE1].rm_so;
|
||
type_index = FLOAT_TYPE1;
|
||
}
|
||
else if (subexps[FLOAT_TYPE2].rm_so != -1)
|
||
{
|
||
/* Found floating point type suffix. */
|
||
end_index = subexps[FLOAT_TYPE2].rm_so;
|
||
type_index = FLOAT_TYPE2;
|
||
}
|
||
else
|
||
{
|
||
/* Any other floating point match. */
|
||
end_index = subexps[0].rm_eo;
|
||
type_name = "f64";
|
||
}
|
||
|
||
/* We need a special case if the final character is ".". In this
|
||
case we might need to parse an integer. For example, "23.f()" is
|
||
a request for a trait method call, not a syntax error involving
|
||
the floating point number "23.". */
|
||
gdb_assert (subexps[0].rm_eo > 0);
|
||
if (lexptr[subexps[0].rm_eo - 1] == '.')
|
||
{
|
||
const char *next = skip_spaces_const (&lexptr[subexps[0].rm_eo]);
|
||
|
||
if (rust_identifier_start_p (*next) || *next == '.')
|
||
{
|
||
--subexps[0].rm_eo;
|
||
is_integer = 1;
|
||
end_index = subexps[0].rm_eo;
|
||
type_name = "i32";
|
||
could_be_decimal = 1;
|
||
implicit_i32 = 1;
|
||
}
|
||
}
|
||
|
||
/* Compute the type name if we haven't already. */
|
||
std::string type_name_holder;
|
||
if (type_name == NULL)
|
||
{
|
||
gdb_assert (type_index != -1);
|
||
type_name_holder = std::string (lexptr + subexps[type_index].rm_so,
|
||
(subexps[type_index].rm_eo
|
||
- subexps[type_index].rm_so));
|
||
type_name = type_name_holder.c_str ();
|
||
}
|
||
|
||
/* Look up the type. */
|
||
type = rust_type (type_name);
|
||
|
||
/* Copy the text of the number and remove the "_"s. */
|
||
std::string number;
|
||
for (i = 0; i < end_index && lexptr[i]; ++i)
|
||
{
|
||
if (lexptr[i] == '_')
|
||
could_be_decimal = 0;
|
||
else
|
||
number.push_back (lexptr[i]);
|
||
}
|
||
|
||
/* Advance past the match. */
|
||
lexptr += subexps[0].rm_eo;
|
||
|
||
/* Parse the number. */
|
||
if (is_integer)
|
||
{
|
||
uint64_t value;
|
||
int radix = 10;
|
||
int offset = 0;
|
||
|
||
if (number[0] == '0')
|
||
{
|
||
if (number[1] == 'x')
|
||
radix = 16;
|
||
else if (number[1] == 'o')
|
||
radix = 8;
|
||
else if (number[1] == 'b')
|
||
radix = 2;
|
||
if (radix != 10)
|
||
{
|
||
offset = 2;
|
||
could_be_decimal = 0;
|
||
}
|
||
}
|
||
|
||
value = strtoul (number.c_str () + offset, NULL, radix);
|
||
if (implicit_i32 && value >= ((uint64_t) 1) << 31)
|
||
type = rust_type ("i64");
|
||
|
||
rustyylval.typed_val_int.val = value;
|
||
rustyylval.typed_val_int.type = type;
|
||
}
|
||
else
|
||
{
|
||
rustyylval.typed_val_float.dval = strtod (number.c_str (), NULL);
|
||
rustyylval.typed_val_float.type = type;
|
||
}
|
||
|
||
return is_integer ? (could_be_decimal ? DECIMAL_INTEGER : INTEGER) : FLOAT;
|
||
}
|
||
|
||
/* The lexer. */
|
||
|
||
static int
|
||
rustyylex (void)
|
||
{
|
||
/* Skip all leading whitespace. */
|
||
while (lexptr[0] == ' ' || lexptr[0] == '\t' || lexptr[0] == '\r'
|
||
|| lexptr[0] == '\n')
|
||
++lexptr;
|
||
|
||
/* If we hit EOF and we're completing, then return COMPLETE -- maybe
|
||
we're completing an empty string at the end of a field_expr.
|
||
But, we don't want to return two COMPLETE tokens in a row. */
|
||
if (lexptr[0] == '\0' && lexptr == prev_lexptr)
|
||
return 0;
|
||
prev_lexptr = lexptr;
|
||
if (lexptr[0] == '\0')
|
||
{
|
||
if (parse_completion)
|
||
{
|
||
rustyylval.sval = make_stoken ("");
|
||
return COMPLETE;
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
if (lexptr[0] >= '0' && lexptr[0] <= '9')
|
||
return lex_number ();
|
||
else if (lexptr[0] == 'b' && lexptr[1] == '\'')
|
||
return lex_character ();
|
||
else if (lexptr[0] == 'b' && lexptr[1] == '"')
|
||
return lex_string ();
|
||
else if (lexptr[0] == 'b' && starts_raw_string (lexptr + 1))
|
||
return lex_string ();
|
||
else if (starts_raw_string (lexptr))
|
||
return lex_string ();
|
||
else if (rust_identifier_start_p (lexptr[0]))
|
||
return lex_identifier ();
|
||
else if (lexptr[0] == '"')
|
||
return lex_string ();
|
||
else if (lexptr[0] == '\'')
|
||
return lex_character ();
|
||
else if (lexptr[0] == '}' || lexptr[0] == ']')
|
||
{
|
||
/* Falls through to lex_operator. */
|
||
--paren_depth;
|
||
}
|
||
else if (lexptr[0] == '(' || lexptr[0] == '{')
|
||
{
|
||
/* Falls through to lex_operator. */
|
||
++paren_depth;
|
||
}
|
||
else if (lexptr[0] == ',' && comma_terminates && paren_depth == 0)
|
||
return 0;
|
||
|
||
return lex_operator ();
|
||
}
|
||
|
||
/* Push back a single character to be re-lexed. */
|
||
|
||
static void
|
||
rust_push_back (char c)
|
||
{
|
||
/* Can't be called before any lexing. */
|
||
gdb_assert (prev_lexptr != NULL);
|
||
|
||
--lexptr;
|
||
gdb_assert (*lexptr == c);
|
||
}
|
||
|
||
|
||
|
||
/* Make an arbitrary operation and fill in the fields. */
|
||
|
||
static const struct rust_op *
|
||
ast_operation (enum exp_opcode opcode, const struct rust_op *left,
|
||
const struct rust_op *right)
|
||
{
|
||
struct rust_op *result = OBSTACK_ZALLOC (work_obstack, struct rust_op);
|
||
|
||
result->opcode = opcode;
|
||
result->left.op = left;
|
||
result->right.op = right;
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Make a compound assignment operation. */
|
||
|
||
static const struct rust_op *
|
||
ast_compound_assignment (enum exp_opcode opcode, const struct rust_op *left,
|
||
const struct rust_op *right)
|
||
{
|
||
struct rust_op *result = OBSTACK_ZALLOC (work_obstack, struct rust_op);
|
||
|
||
result->opcode = opcode;
|
||
result->compound_assignment = 1;
|
||
result->left.op = left;
|
||
result->right.op = right;
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Make a typed integer literal operation. */
|
||
|
||
static const struct rust_op *
|
||
ast_literal (struct typed_val_int val)
|
||
{
|
||
struct rust_op *result = OBSTACK_ZALLOC (work_obstack, struct rust_op);
|
||
|
||
result->opcode = OP_LONG;
|
||
result->left.typed_val_int = val;
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Make a typed floating point literal operation. */
|
||
|
||
static const struct rust_op *
|
||
ast_dliteral (struct typed_val_float val)
|
||
{
|
||
struct rust_op *result = OBSTACK_ZALLOC (work_obstack, struct rust_op);
|
||
|
||
result->opcode = OP_DOUBLE;
|
||
result->left.typed_val_float = val;
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Make a unary operation. */
|
||
|
||
static const struct rust_op *
|
||
ast_unary (enum exp_opcode opcode, const struct rust_op *expr)
|
||
{
|
||
return ast_operation (opcode, expr, NULL);
|
||
}
|
||
|
||
/* Make a cast operation. */
|
||
|
||
static const struct rust_op *
|
||
ast_cast (const struct rust_op *expr, const struct rust_op *type)
|
||
{
|
||
struct rust_op *result = OBSTACK_ZALLOC (work_obstack, struct rust_op);
|
||
|
||
result->opcode = UNOP_CAST;
|
||
result->left.op = expr;
|
||
result->right.op = type;
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Make a call-like operation. This is nominally a function call, but
|
||
when lowering we may discover that it actually represents the
|
||
creation of a tuple struct. */
|
||
|
||
static const struct rust_op *
|
||
ast_call_ish (enum exp_opcode opcode, const struct rust_op *expr,
|
||
rust_op_vector *params)
|
||
{
|
||
struct rust_op *result = OBSTACK_ZALLOC (work_obstack, struct rust_op);
|
||
|
||
result->opcode = opcode;
|
||
result->left.op = expr;
|
||
result->right.params = params;
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Make a structure creation operation. */
|
||
|
||
static const struct rust_op *
|
||
ast_struct (const struct rust_op *name, rust_set_vector *fields)
|
||
{
|
||
struct rust_op *result = OBSTACK_ZALLOC (work_obstack, struct rust_op);
|
||
|
||
result->opcode = OP_AGGREGATE;
|
||
result->left.op = name;
|
||
result->right.field_inits = fields;
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Make an identifier path. */
|
||
|
||
static const struct rust_op *
|
||
ast_path (struct stoken path, rust_op_vector *params)
|
||
{
|
||
struct rust_op *result = OBSTACK_ZALLOC (work_obstack, struct rust_op);
|
||
|
||
result->opcode = OP_VAR_VALUE;
|
||
result->left.sval = path;
|
||
result->right.params = params;
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Make a string constant operation. */
|
||
|
||
static const struct rust_op *
|
||
ast_string (struct stoken str)
|
||
{
|
||
struct rust_op *result = OBSTACK_ZALLOC (work_obstack, struct rust_op);
|
||
|
||
result->opcode = OP_STRING;
|
||
result->left.sval = str;
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Make a field expression. */
|
||
|
||
static const struct rust_op *
|
||
ast_structop (const struct rust_op *left, const char *name, int completing)
|
||
{
|
||
struct rust_op *result = OBSTACK_ZALLOC (work_obstack, struct rust_op);
|
||
|
||
result->opcode = STRUCTOP_STRUCT;
|
||
result->completing = completing;
|
||
result->left.op = left;
|
||
result->right.sval = make_stoken (name);
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Make an anonymous struct operation, like 'x.0'. */
|
||
|
||
static const struct rust_op *
|
||
ast_structop_anonymous (const struct rust_op *left,
|
||
struct typed_val_int number)
|
||
{
|
||
struct rust_op *result = OBSTACK_ZALLOC (work_obstack, struct rust_op);
|
||
|
||
result->opcode = STRUCTOP_ANONYMOUS;
|
||
result->left.op = left;
|
||
result->right.typed_val_int = number;
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Make a range operation. */
|
||
|
||
static const struct rust_op *
|
||
ast_range (const struct rust_op *lhs, const struct rust_op *rhs)
|
||
{
|
||
struct rust_op *result = OBSTACK_ZALLOC (work_obstack, struct rust_op);
|
||
|
||
result->opcode = OP_RANGE;
|
||
result->left.op = lhs;
|
||
result->right.op = rhs;
|
||
|
||
return result;
|
||
}
|
||
|
||
/* A helper function to make a type-related AST node. */
|
||
|
||
static struct rust_op *
|
||
ast_basic_type (enum type_code typecode)
|
||
{
|
||
struct rust_op *result = OBSTACK_ZALLOC (work_obstack, struct rust_op);
|
||
|
||
result->opcode = OP_TYPE;
|
||
result->typecode = typecode;
|
||
return result;
|
||
}
|
||
|
||
/* Create an AST node describing an array type. */
|
||
|
||
static const struct rust_op *
|
||
ast_array_type (const struct rust_op *lhs, struct typed_val_int val)
|
||
{
|
||
struct rust_op *result = ast_basic_type (TYPE_CODE_ARRAY);
|
||
|
||
result->left.op = lhs;
|
||
result->right.typed_val_int = val;
|
||
return result;
|
||
}
|
||
|
||
/* Create an AST node describing a reference type. */
|
||
|
||
static const struct rust_op *
|
||
ast_slice_type (const struct rust_op *type)
|
||
{
|
||
/* Use TYPE_CODE_COMPLEX just because it is handy. */
|
||
struct rust_op *result = ast_basic_type (TYPE_CODE_COMPLEX);
|
||
|
||
result->left.op = type;
|
||
return result;
|
||
}
|
||
|
||
/* Create an AST node describing a reference type. */
|
||
|
||
static const struct rust_op *
|
||
ast_reference_type (const struct rust_op *type)
|
||
{
|
||
struct rust_op *result = ast_basic_type (TYPE_CODE_REF);
|
||
|
||
result->left.op = type;
|
||
return result;
|
||
}
|
||
|
||
/* Create an AST node describing a pointer type. */
|
||
|
||
static const struct rust_op *
|
||
ast_pointer_type (const struct rust_op *type, int is_mut)
|
||
{
|
||
struct rust_op *result = ast_basic_type (TYPE_CODE_PTR);
|
||
|
||
result->left.op = type;
|
||
/* For the time being we ignore is_mut. */
|
||
return result;
|
||
}
|
||
|
||
/* Create an AST node describing a function type. */
|
||
|
||
static const struct rust_op *
|
||
ast_function_type (const struct rust_op *rtype, rust_op_vector *params)
|
||
{
|
||
struct rust_op *result = ast_basic_type (TYPE_CODE_FUNC);
|
||
|
||
result->left.op = rtype;
|
||
result->right.params = params;
|
||
return result;
|
||
}
|
||
|
||
/* Create an AST node describing a tuple type. */
|
||
|
||
static const struct rust_op *
|
||
ast_tuple_type (rust_op_vector *params)
|
||
{
|
||
struct rust_op *result = ast_basic_type (TYPE_CODE_STRUCT);
|
||
|
||
result->left.params = params;
|
||
return result;
|
||
}
|
||
|
||
/* A helper to appropriately munge NAME and BLOCK depending on the
|
||
presence of a leading "::". */
|
||
|
||
static void
|
||
munge_name_and_block (const char **name, const struct block **block)
|
||
{
|
||
/* If it is a global reference, skip the current block in favor of
|
||
the static block. */
|
||
if (strncmp (*name, "::", 2) == 0)
|
||
{
|
||
*name += 2;
|
||
*block = block_static_block (*block);
|
||
}
|
||
}
|
||
|
||
/* Like lookup_symbol, but handles Rust namespace conventions, and
|
||
doesn't require field_of_this_result. */
|
||
|
||
static struct block_symbol
|
||
rust_lookup_symbol (const char *name, const struct block *block,
|
||
const domain_enum domain)
|
||
{
|
||
struct block_symbol result;
|
||
|
||
munge_name_and_block (&name, &block);
|
||
|
||
result = lookup_symbol (name, block, domain, NULL);
|
||
if (result.symbol != NULL)
|
||
update_innermost_block (result);
|
||
return result;
|
||
}
|
||
|
||
/* Look up a type, following Rust namespace conventions. */
|
||
|
||
static struct type *
|
||
rust_lookup_type (const char *name, const struct block *block)
|
||
{
|
||
struct block_symbol result;
|
||
struct type *type;
|
||
|
||
munge_name_and_block (&name, &block);
|
||
|
||
result = lookup_symbol (name, block, STRUCT_DOMAIN, NULL);
|
||
if (result.symbol != NULL)
|
||
{
|
||
update_innermost_block (result);
|
||
return SYMBOL_TYPE (result.symbol);
|
||
}
|
||
|
||
type = lookup_typename (current_parser->language (), current_parser->arch (),
|
||
name, NULL, 1);
|
||
if (type != NULL)
|
||
return type;
|
||
|
||
/* Last chance, try a built-in type. */
|
||
return language_lookup_primitive_type (current_parser->language (),
|
||
current_parser->arch (),
|
||
name);
|
||
}
|
||
|
||
static struct type *convert_ast_to_type (struct parser_state *state,
|
||
const struct rust_op *operation);
|
||
static const char *convert_name (struct parser_state *state,
|
||
const struct rust_op *operation);
|
||
|
||
/* Convert a vector of rust_ops representing types to a vector of
|
||
types. */
|
||
|
||
static std::vector<struct type *>
|
||
convert_params_to_types (struct parser_state *state, rust_op_vector *params)
|
||
{
|
||
std::vector<struct type *> result;
|
||
|
||
for (const rust_op *op : *params)
|
||
result.push_back (convert_ast_to_type (state, op));
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Convert a rust_op representing a type to a struct type *. */
|
||
|
||
static struct type *
|
||
convert_ast_to_type (struct parser_state *state,
|
||
const struct rust_op *operation)
|
||
{
|
||
struct type *type, *result = NULL;
|
||
|
||
if (operation->opcode == OP_VAR_VALUE)
|
||
{
|
||
const char *varname = convert_name (state, operation);
|
||
|
||
result = rust_lookup_type (varname, expression_context_block);
|
||
if (result == NULL)
|
||
error (_("No typed name '%s' in current context"), varname);
|
||
return result;
|
||
}
|
||
|
||
gdb_assert (operation->opcode == OP_TYPE);
|
||
|
||
switch (operation->typecode)
|
||
{
|
||
case TYPE_CODE_ARRAY:
|
||
type = convert_ast_to_type (state, operation->left.op);
|
||
if (operation->right.typed_val_int.val < 0)
|
||
error (_("Negative array length"));
|
||
result = lookup_array_range_type (type, 0,
|
||
operation->right.typed_val_int.val - 1);
|
||
break;
|
||
|
||
case TYPE_CODE_COMPLEX:
|
||
{
|
||
struct type *usize = rust_type ("usize");
|
||
|
||
type = convert_ast_to_type (state, operation->left.op);
|
||
result = rust_slice_type ("&[*gdb*]", type, usize);
|
||
}
|
||
break;
|
||
|
||
case TYPE_CODE_REF:
|
||
case TYPE_CODE_PTR:
|
||
/* For now we treat &x and *x identically. */
|
||
type = convert_ast_to_type (state, operation->left.op);
|
||
result = lookup_pointer_type (type);
|
||
break;
|
||
|
||
case TYPE_CODE_FUNC:
|
||
{
|
||
std::vector<struct type *> args
|
||
(convert_params_to_types (state, operation->right.params));
|
||
struct type **argtypes = NULL;
|
||
|
||
type = convert_ast_to_type (state, operation->left.op);
|
||
if (!args.empty ())
|
||
argtypes = args.data ();
|
||
|
||
result
|
||
= lookup_function_type_with_arguments (type, args.size (),
|
||
argtypes);
|
||
result = lookup_pointer_type (result);
|
||
}
|
||
break;
|
||
|
||
case TYPE_CODE_STRUCT:
|
||
{
|
||
std::vector<struct type *> args
|
||
(convert_params_to_types (state, operation->left.params));
|
||
int i;
|
||
struct type *type;
|
||
const char *name;
|
||
|
||
obstack_1grow (work_obstack, '(');
|
||
for (i = 0; i < args.size (); ++i)
|
||
{
|
||
std::string type_name = type_to_string (args[i]);
|
||
|
||
if (i > 0)
|
||
obstack_1grow (work_obstack, ',');
|
||
obstack_grow_str (work_obstack, type_name.c_str ());
|
||
}
|
||
|
||
obstack_grow_str0 (work_obstack, ")");
|
||
name = (const char *) obstack_finish (work_obstack);
|
||
|
||
/* We don't allow creating new tuple types (yet), but we do
|
||
allow looking up existing tuple types. */
|
||
result = rust_lookup_type (name, expression_context_block);
|
||
if (result == NULL)
|
||
error (_("could not find tuple type '%s'"), name);
|
||
}
|
||
break;
|
||
|
||
default:
|
||
gdb_assert_not_reached ("unhandled opcode in convert_ast_to_type");
|
||
}
|
||
|
||
gdb_assert (result != NULL);
|
||
return result;
|
||
}
|
||
|
||
/* A helper function to turn a rust_op representing a name into a full
|
||
name. This applies generic arguments as needed. The returned name
|
||
is allocated on the work obstack. */
|
||
|
||
static const char *
|
||
convert_name (struct parser_state *state, const struct rust_op *operation)
|
||
{
|
||
int i;
|
||
|
||
gdb_assert (operation->opcode == OP_VAR_VALUE);
|
||
|
||
if (operation->right.params == NULL)
|
||
return operation->left.sval.ptr;
|
||
|
||
std::vector<struct type *> types
|
||
(convert_params_to_types (state, operation->right.params));
|
||
|
||
obstack_grow_str (work_obstack, operation->left.sval.ptr);
|
||
obstack_1grow (work_obstack, '<');
|
||
for (i = 0; i < types.size (); ++i)
|
||
{
|
||
std::string type_name = type_to_string (types[i]);
|
||
|
||
if (i > 0)
|
||
obstack_1grow (work_obstack, ',');
|
||
|
||
obstack_grow_str (work_obstack, type_name.c_str ());
|
||
}
|
||
obstack_grow_str0 (work_obstack, ">");
|
||
|
||
return (const char *) obstack_finish (work_obstack);
|
||
}
|
||
|
||
static void convert_ast_to_expression (struct parser_state *state,
|
||
const struct rust_op *operation,
|
||
const struct rust_op *top,
|
||
bool want_type = false);
|
||
|
||
/* A helper function that converts a vec of rust_ops to a gdb
|
||
expression. */
|
||
|
||
static void
|
||
convert_params_to_expression (struct parser_state *state,
|
||
rust_op_vector *params,
|
||
const struct rust_op *top)
|
||
{
|
||
for (const rust_op *elem : *params)
|
||
convert_ast_to_expression (state, elem, top);
|
||
}
|
||
|
||
/* Lower a rust_op to a gdb expression. STATE is the parser state.
|
||
OPERATION is the operation to lower. TOP is a pointer to the
|
||
top-most operation; it is used to handle the special case where the
|
||
top-most expression is an identifier and can be optionally lowered
|
||
to OP_TYPE. WANT_TYPE is a flag indicating that, if the expression
|
||
is the name of a type, then emit an OP_TYPE for it (rather than
|
||
erroring). If WANT_TYPE is set, then the similar TOP handling is
|
||
not done. */
|
||
|
||
static void
|
||
convert_ast_to_expression (struct parser_state *state,
|
||
const struct rust_op *operation,
|
||
const struct rust_op *top,
|
||
bool want_type)
|
||
{
|
||
switch (operation->opcode)
|
||
{
|
||
case OP_LONG:
|
||
write_exp_elt_opcode (state, OP_LONG);
|
||
write_exp_elt_type (state, operation->left.typed_val_int.type);
|
||
write_exp_elt_longcst (state, operation->left.typed_val_int.val);
|
||
write_exp_elt_opcode (state, OP_LONG);
|
||
break;
|
||
|
||
case OP_DOUBLE:
|
||
write_exp_elt_opcode (state, OP_DOUBLE);
|
||
write_exp_elt_type (state, operation->left.typed_val_float.type);
|
||
write_exp_elt_dblcst (state, operation->left.typed_val_float.dval);
|
||
write_exp_elt_opcode (state, OP_DOUBLE);
|
||
break;
|
||
|
||
case STRUCTOP_STRUCT:
|
||
{
|
||
convert_ast_to_expression (state, operation->left.op, top);
|
||
|
||
if (operation->completing)
|
||
mark_struct_expression (state);
|
||
write_exp_elt_opcode (state, STRUCTOP_STRUCT);
|
||
write_exp_string (state, operation->right.sval);
|
||
write_exp_elt_opcode (state, STRUCTOP_STRUCT);
|
||
}
|
||
break;
|
||
|
||
case STRUCTOP_ANONYMOUS:
|
||
{
|
||
convert_ast_to_expression (state, operation->left.op, top);
|
||
|
||
write_exp_elt_opcode (state, STRUCTOP_ANONYMOUS);
|
||
write_exp_elt_longcst (state, operation->right.typed_val_int.val);
|
||
write_exp_elt_opcode (state, STRUCTOP_ANONYMOUS);
|
||
}
|
||
break;
|
||
|
||
case UNOP_SIZEOF:
|
||
convert_ast_to_expression (state, operation->left.op, top, true);
|
||
write_exp_elt_opcode (state, UNOP_SIZEOF);
|
||
break;
|
||
|
||
case UNOP_PLUS:
|
||
case UNOP_NEG:
|
||
case UNOP_COMPLEMENT:
|
||
case UNOP_IND:
|
||
case UNOP_ADDR:
|
||
convert_ast_to_expression (state, operation->left.op, top);
|
||
write_exp_elt_opcode (state, operation->opcode);
|
||
break;
|
||
|
||
case BINOP_SUBSCRIPT:
|
||
case BINOP_MUL:
|
||
case BINOP_REPEAT:
|
||
case BINOP_DIV:
|
||
case BINOP_REM:
|
||
case BINOP_LESS:
|
||
case BINOP_GTR:
|
||
case BINOP_BITWISE_AND:
|
||
case BINOP_BITWISE_IOR:
|
||
case BINOP_BITWISE_XOR:
|
||
case BINOP_ADD:
|
||
case BINOP_SUB:
|
||
case BINOP_LOGICAL_OR:
|
||
case BINOP_LOGICAL_AND:
|
||
case BINOP_EQUAL:
|
||
case BINOP_NOTEQUAL:
|
||
case BINOP_LEQ:
|
||
case BINOP_GEQ:
|
||
case BINOP_LSH:
|
||
case BINOP_RSH:
|
||
case BINOP_ASSIGN:
|
||
case OP_RUST_ARRAY:
|
||
convert_ast_to_expression (state, operation->left.op, top);
|
||
convert_ast_to_expression (state, operation->right.op, top);
|
||
if (operation->compound_assignment)
|
||
{
|
||
write_exp_elt_opcode (state, BINOP_ASSIGN_MODIFY);
|
||
write_exp_elt_opcode (state, operation->opcode);
|
||
write_exp_elt_opcode (state, BINOP_ASSIGN_MODIFY);
|
||
}
|
||
else
|
||
write_exp_elt_opcode (state, operation->opcode);
|
||
|
||
if (operation->compound_assignment
|
||
|| operation->opcode == BINOP_ASSIGN)
|
||
{
|
||
struct type *type;
|
||
|
||
type = language_lookup_primitive_type (parse_language (state),
|
||
parse_gdbarch (state),
|
||
"()");
|
||
|
||
write_exp_elt_opcode (state, OP_LONG);
|
||
write_exp_elt_type (state, type);
|
||
write_exp_elt_longcst (state, 0);
|
||
write_exp_elt_opcode (state, OP_LONG);
|
||
|
||
write_exp_elt_opcode (state, BINOP_COMMA);
|
||
}
|
||
break;
|
||
|
||
case UNOP_CAST:
|
||
{
|
||
struct type *type = convert_ast_to_type (state, operation->right.op);
|
||
|
||
convert_ast_to_expression (state, operation->left.op, top);
|
||
write_exp_elt_opcode (state, UNOP_CAST);
|
||
write_exp_elt_type (state, type);
|
||
write_exp_elt_opcode (state, UNOP_CAST);
|
||
}
|
||
break;
|
||
|
||
case OP_FUNCALL:
|
||
{
|
||
if (operation->left.op->opcode == OP_VAR_VALUE)
|
||
{
|
||
struct type *type;
|
||
const char *varname = convert_name (state, operation->left.op);
|
||
|
||
type = rust_lookup_type (varname, expression_context_block);
|
||
if (type != NULL)
|
||
{
|
||
/* This is actually a tuple struct expression, not a
|
||
call expression. */
|
||
rust_op_vector *params = operation->right.params;
|
||
|
||
if (TYPE_CODE (type) != TYPE_CODE_NAMESPACE)
|
||
{
|
||
if (!rust_tuple_struct_type_p (type))
|
||
error (_("Type %s is not a tuple struct"), varname);
|
||
|
||
for (int i = 0; i < params->size (); ++i)
|
||
{
|
||
char *cell = get_print_cell ();
|
||
|
||
xsnprintf (cell, PRINT_CELL_SIZE, "__%d", i);
|
||
write_exp_elt_opcode (state, OP_NAME);
|
||
write_exp_string (state, make_stoken (cell));
|
||
write_exp_elt_opcode (state, OP_NAME);
|
||
|
||
convert_ast_to_expression (state, (*params)[i], top);
|
||
}
|
||
|
||
write_exp_elt_opcode (state, OP_AGGREGATE);
|
||
write_exp_elt_type (state, type);
|
||
write_exp_elt_longcst (state, 2 * params->size ());
|
||
write_exp_elt_opcode (state, OP_AGGREGATE);
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
convert_ast_to_expression (state, operation->left.op, top);
|
||
convert_params_to_expression (state, operation->right.params, top);
|
||
write_exp_elt_opcode (state, OP_FUNCALL);
|
||
write_exp_elt_longcst (state, operation->right.params->size ());
|
||
write_exp_elt_longcst (state, OP_FUNCALL);
|
||
}
|
||
break;
|
||
|
||
case OP_ARRAY:
|
||
gdb_assert (operation->left.op == NULL);
|
||
convert_params_to_expression (state, operation->right.params, top);
|
||
write_exp_elt_opcode (state, OP_ARRAY);
|
||
write_exp_elt_longcst (state, 0);
|
||
write_exp_elt_longcst (state, operation->right.params->size () - 1);
|
||
write_exp_elt_longcst (state, OP_ARRAY);
|
||
break;
|
||
|
||
case OP_VAR_VALUE:
|
||
{
|
||
struct block_symbol sym;
|
||
const char *varname;
|
||
|
||
if (operation->left.sval.ptr[0] == '$')
|
||
{
|
||
write_dollar_variable (state, operation->left.sval);
|
||
break;
|
||
}
|
||
|
||
varname = convert_name (state, operation);
|
||
sym = rust_lookup_symbol (varname, expression_context_block,
|
||
VAR_DOMAIN);
|
||
if (sym.symbol != NULL && SYMBOL_CLASS (sym.symbol) != LOC_TYPEDEF)
|
||
{
|
||
write_exp_elt_opcode (state, OP_VAR_VALUE);
|
||
write_exp_elt_block (state, sym.block);
|
||
write_exp_elt_sym (state, sym.symbol);
|
||
write_exp_elt_opcode (state, OP_VAR_VALUE);
|
||
}
|
||
else
|
||
{
|
||
struct type *type = NULL;
|
||
|
||
if (sym.symbol != NULL)
|
||
{
|
||
gdb_assert (SYMBOL_CLASS (sym.symbol) == LOC_TYPEDEF);
|
||
type = SYMBOL_TYPE (sym.symbol);
|
||
}
|
||
if (type == NULL)
|
||
type = rust_lookup_type (varname, expression_context_block);
|
||
if (type == NULL)
|
||
error (_("No symbol '%s' in current context"), varname);
|
||
|
||
if (!want_type
|
||
&& TYPE_CODE (type) == TYPE_CODE_STRUCT
|
||
&& TYPE_NFIELDS (type) == 0)
|
||
{
|
||
/* A unit-like struct. */
|
||
write_exp_elt_opcode (state, OP_AGGREGATE);
|
||
write_exp_elt_type (state, type);
|
||
write_exp_elt_longcst (state, 0);
|
||
write_exp_elt_opcode (state, OP_AGGREGATE);
|
||
}
|
||
else if (want_type || operation == top)
|
||
{
|
||
write_exp_elt_opcode (state, OP_TYPE);
|
||
write_exp_elt_type (state, type);
|
||
write_exp_elt_opcode (state, OP_TYPE);
|
||
}
|
||
else
|
||
error (_("Found type '%s', which can't be "
|
||
"evaluated in this context"),
|
||
varname);
|
||
}
|
||
}
|
||
break;
|
||
|
||
case OP_AGGREGATE:
|
||
{
|
||
int i;
|
||
int length;
|
||
rust_set_vector *fields = operation->right.field_inits;
|
||
struct type *type;
|
||
const char *name;
|
||
|
||
length = 0;
|
||
for (const set_field &init : *fields)
|
||
{
|
||
if (init.name.ptr != NULL)
|
||
{
|
||
write_exp_elt_opcode (state, OP_NAME);
|
||
write_exp_string (state, init.name);
|
||
write_exp_elt_opcode (state, OP_NAME);
|
||
++length;
|
||
}
|
||
|
||
convert_ast_to_expression (state, init.init, top);
|
||
++length;
|
||
|
||
if (init.name.ptr == NULL)
|
||
{
|
||
/* This is handled differently from Ada in our
|
||
evaluator. */
|
||
write_exp_elt_opcode (state, OP_OTHERS);
|
||
}
|
||
}
|
||
|
||
name = convert_name (state, operation->left.op);
|
||
type = rust_lookup_type (name, expression_context_block);
|
||
if (type == NULL)
|
||
error (_("Could not find type '%s'"), operation->left.sval.ptr);
|
||
|
||
if (TYPE_CODE (type) != TYPE_CODE_STRUCT
|
||
|| rust_tuple_type_p (type)
|
||
|| rust_tuple_struct_type_p (type))
|
||
error (_("Struct expression applied to non-struct type"));
|
||
|
||
write_exp_elt_opcode (state, OP_AGGREGATE);
|
||
write_exp_elt_type (state, type);
|
||
write_exp_elt_longcst (state, length);
|
||
write_exp_elt_opcode (state, OP_AGGREGATE);
|
||
}
|
||
break;
|
||
|
||
case OP_STRING:
|
||
{
|
||
write_exp_elt_opcode (state, OP_STRING);
|
||
write_exp_string (state, operation->left.sval);
|
||
write_exp_elt_opcode (state, OP_STRING);
|
||
}
|
||
break;
|
||
|
||
case OP_RANGE:
|
||
{
|
||
enum range_type kind = BOTH_BOUND_DEFAULT;
|
||
|
||
if (operation->left.op != NULL)
|
||
{
|
||
convert_ast_to_expression (state, operation->left.op, top);
|
||
kind = HIGH_BOUND_DEFAULT;
|
||
}
|
||
if (operation->right.op != NULL)
|
||
{
|
||
convert_ast_to_expression (state, operation->right.op, top);
|
||
if (kind == BOTH_BOUND_DEFAULT)
|
||
kind = LOW_BOUND_DEFAULT;
|
||
else
|
||
{
|
||
gdb_assert (kind == HIGH_BOUND_DEFAULT);
|
||
kind = NONE_BOUND_DEFAULT;
|
||
}
|
||
}
|
||
write_exp_elt_opcode (state, OP_RANGE);
|
||
write_exp_elt_longcst (state, kind);
|
||
write_exp_elt_opcode (state, OP_RANGE);
|
||
}
|
||
break;
|
||
|
||
default:
|
||
gdb_assert_not_reached ("unhandled opcode in convert_ast_to_expression");
|
||
}
|
||
}
|
||
|
||
|
||
|
||
/* The parser as exposed to gdb. */
|
||
|
||
int
|
||
rust_parse (struct parser_state *state)
|
||
{
|
||
int result;
|
||
|
||
/* This sets various globals and also clears them on
|
||
destruction. */
|
||
rust_parser parser (state);
|
||
|
||
result = rustyyparse ();
|
||
|
||
if (!result || (parse_completion && parser.rust_ast != NULL))
|
||
convert_ast_to_expression (state, parser.rust_ast, parser.rust_ast);
|
||
|
||
return result;
|
||
}
|
||
|
||
/* The parser error handler. */
|
||
|
||
void
|
||
rustyyerror (const char *msg)
|
||
{
|
||
const char *where = prev_lexptr ? prev_lexptr : lexptr;
|
||
error (_("%s in expression, near `%s'."), (msg ? msg : "Error"), where);
|
||
}
|
||
|
||
|
||
|
||
#if GDB_SELF_TEST
|
||
|
||
/* Initialize the lexer for testing. */
|
||
|
||
static void
|
||
rust_lex_test_init (const char *input)
|
||
{
|
||
prev_lexptr = NULL;
|
||
lexptr = input;
|
||
paren_depth = 0;
|
||
}
|
||
|
||
/* A test helper that lexes a string, expecting a single token. It
|
||
returns the lexer data for this token. */
|
||
|
||
static RUSTSTYPE
|
||
rust_lex_test_one (const char *input, int expected)
|
||
{
|
||
int token;
|
||
RUSTSTYPE result;
|
||
|
||
rust_lex_test_init (input);
|
||
|
||
token = rustyylex ();
|
||
SELF_CHECK (token == expected);
|
||
result = rustyylval;
|
||
|
||
if (token)
|
||
{
|
||
token = rustyylex ();
|
||
SELF_CHECK (token == 0);
|
||
}
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Test that INPUT lexes as the integer VALUE. */
|
||
|
||
static void
|
||
rust_lex_int_test (const char *input, int value, int kind)
|
||
{
|
||
RUSTSTYPE result = rust_lex_test_one (input, kind);
|
||
SELF_CHECK (result.typed_val_int.val == value);
|
||
}
|
||
|
||
/* Test that INPUT throws an exception with text ERR. */
|
||
|
||
static void
|
||
rust_lex_exception_test (const char *input, const char *err)
|
||
{
|
||
TRY
|
||
{
|
||
/* The "kind" doesn't matter. */
|
||
rust_lex_test_one (input, DECIMAL_INTEGER);
|
||
SELF_CHECK (0);
|
||
}
|
||
CATCH (except, RETURN_MASK_ERROR)
|
||
{
|
||
SELF_CHECK (strcmp (except.message, err) == 0);
|
||
}
|
||
END_CATCH
|
||
}
|
||
|
||
/* Test that INPUT lexes as the identifier, string, or byte-string
|
||
VALUE. KIND holds the expected token kind. */
|
||
|
||
static void
|
||
rust_lex_stringish_test (const char *input, const char *value, int kind)
|
||
{
|
||
RUSTSTYPE result = rust_lex_test_one (input, kind);
|
||
SELF_CHECK (result.sval.length == strlen (value));
|
||
SELF_CHECK (strncmp (result.sval.ptr, value, result.sval.length) == 0);
|
||
}
|
||
|
||
/* Helper to test that a string parses as a given token sequence. */
|
||
|
||
static void
|
||
rust_lex_test_sequence (const char *input, int len, const int expected[])
|
||
{
|
||
int i;
|
||
|
||
lexptr = input;
|
||
paren_depth = 0;
|
||
|
||
for (i = 0; i < len; ++i)
|
||
{
|
||
int token = rustyylex ();
|
||
|
||
SELF_CHECK (token == expected[i]);
|
||
}
|
||
}
|
||
|
||
/* Tests for an integer-parsing corner case. */
|
||
|
||
static void
|
||
rust_lex_test_trailing_dot (void)
|
||
{
|
||
const int expected1[] = { DECIMAL_INTEGER, '.', IDENT, '(', ')', 0 };
|
||
const int expected2[] = { INTEGER, '.', IDENT, '(', ')', 0 };
|
||
const int expected3[] = { FLOAT, EQEQ, '(', ')', 0 };
|
||
const int expected4[] = { DECIMAL_INTEGER, DOTDOT, DECIMAL_INTEGER, 0 };
|
||
|
||
rust_lex_test_sequence ("23.g()", ARRAY_SIZE (expected1), expected1);
|
||
rust_lex_test_sequence ("23_0.g()", ARRAY_SIZE (expected2), expected2);
|
||
rust_lex_test_sequence ("23.==()", ARRAY_SIZE (expected3), expected3);
|
||
rust_lex_test_sequence ("23..25", ARRAY_SIZE (expected4), expected4);
|
||
}
|
||
|
||
/* Tests of completion. */
|
||
|
||
static void
|
||
rust_lex_test_completion (void)
|
||
{
|
||
const int expected[] = { IDENT, '.', COMPLETE, 0 };
|
||
|
||
parse_completion = 1;
|
||
|
||
rust_lex_test_sequence ("something.wha", ARRAY_SIZE (expected), expected);
|
||
rust_lex_test_sequence ("something.", ARRAY_SIZE (expected), expected);
|
||
|
||
parse_completion = 0;
|
||
}
|
||
|
||
/* Test pushback. */
|
||
|
||
static void
|
||
rust_lex_test_push_back (void)
|
||
{
|
||
int token;
|
||
|
||
rust_lex_test_init (">>=");
|
||
|
||
token = rustyylex ();
|
||
SELF_CHECK (token == COMPOUND_ASSIGN);
|
||
SELF_CHECK (rustyylval.opcode == BINOP_RSH);
|
||
|
||
rust_push_back ('=');
|
||
|
||
token = rustyylex ();
|
||
SELF_CHECK (token == '=');
|
||
|
||
token = rustyylex ();
|
||
SELF_CHECK (token == 0);
|
||
}
|
||
|
||
/* Unit test the lexer. */
|
||
|
||
static void
|
||
rust_lex_tests (void)
|
||
{
|
||
int i;
|
||
|
||
auto_obstack test_obstack;
|
||
scoped_restore obstack_holder = make_scoped_restore (&work_obstack,
|
||
&test_obstack);
|
||
|
||
unit_testing = 1;
|
||
|
||
rust_lex_test_one ("", 0);
|
||
rust_lex_test_one (" \t \n \r ", 0);
|
||
rust_lex_test_one ("thread 23", 0);
|
||
rust_lex_test_one ("task 23", 0);
|
||
rust_lex_test_one ("th 104", 0);
|
||
rust_lex_test_one ("ta 97", 0);
|
||
|
||
rust_lex_int_test ("'z'", 'z', INTEGER);
|
||
rust_lex_int_test ("'\\xff'", 0xff, INTEGER);
|
||
rust_lex_int_test ("'\\u{1016f}'", 0x1016f, INTEGER);
|
||
rust_lex_int_test ("b'z'", 'z', INTEGER);
|
||
rust_lex_int_test ("b'\\xfe'", 0xfe, INTEGER);
|
||
rust_lex_int_test ("b'\\xFE'", 0xfe, INTEGER);
|
||
rust_lex_int_test ("b'\\xfE'", 0xfe, INTEGER);
|
||
|
||
/* Test all escapes in both modes. */
|
||
rust_lex_int_test ("'\\n'", '\n', INTEGER);
|
||
rust_lex_int_test ("'\\r'", '\r', INTEGER);
|
||
rust_lex_int_test ("'\\t'", '\t', INTEGER);
|
||
rust_lex_int_test ("'\\\\'", '\\', INTEGER);
|
||
rust_lex_int_test ("'\\0'", '\0', INTEGER);
|
||
rust_lex_int_test ("'\\''", '\'', INTEGER);
|
||
rust_lex_int_test ("'\\\"'", '"', INTEGER);
|
||
|
||
rust_lex_int_test ("b'\\n'", '\n', INTEGER);
|
||
rust_lex_int_test ("b'\\r'", '\r', INTEGER);
|
||
rust_lex_int_test ("b'\\t'", '\t', INTEGER);
|
||
rust_lex_int_test ("b'\\\\'", '\\', INTEGER);
|
||
rust_lex_int_test ("b'\\0'", '\0', INTEGER);
|
||
rust_lex_int_test ("b'\\''", '\'', INTEGER);
|
||
rust_lex_int_test ("b'\\\"'", '"', INTEGER);
|
||
|
||
rust_lex_exception_test ("'z", "Unterminated character literal");
|
||
rust_lex_exception_test ("b'\\x0'", "Not enough hex digits seen");
|
||
rust_lex_exception_test ("b'\\u{0}'", "Unicode escape in byte literal");
|
||
rust_lex_exception_test ("'\\x0'", "Not enough hex digits seen");
|
||
rust_lex_exception_test ("'\\u0'", "Missing '{' in Unicode escape");
|
||
rust_lex_exception_test ("'\\u{0", "Missing '}' in Unicode escape");
|
||
rust_lex_exception_test ("'\\u{0000007}", "Overlong hex escape");
|
||
rust_lex_exception_test ("'\\u{}", "Not enough hex digits seen");
|
||
rust_lex_exception_test ("'\\Q'", "Invalid escape \\Q in literal");
|
||
rust_lex_exception_test ("b'\\Q'", "Invalid escape \\Q in literal");
|
||
|
||
rust_lex_int_test ("23", 23, DECIMAL_INTEGER);
|
||
rust_lex_int_test ("2_344__29", 234429, INTEGER);
|
||
rust_lex_int_test ("0x1f", 0x1f, INTEGER);
|
||
rust_lex_int_test ("23usize", 23, INTEGER);
|
||
rust_lex_int_test ("23i32", 23, INTEGER);
|
||
rust_lex_int_test ("0x1_f", 0x1f, INTEGER);
|
||
rust_lex_int_test ("0b1_101011__", 0x6b, INTEGER);
|
||
rust_lex_int_test ("0o001177i64", 639, INTEGER);
|
||
|
||
rust_lex_test_trailing_dot ();
|
||
|
||
rust_lex_test_one ("23.", FLOAT);
|
||
rust_lex_test_one ("23.99f32", FLOAT);
|
||
rust_lex_test_one ("23e7", FLOAT);
|
||
rust_lex_test_one ("23E-7", FLOAT);
|
||
rust_lex_test_one ("23e+7", FLOAT);
|
||
rust_lex_test_one ("23.99e+7f64", FLOAT);
|
||
rust_lex_test_one ("23.82f32", FLOAT);
|
||
|
||
rust_lex_stringish_test ("hibob", "hibob", IDENT);
|
||
rust_lex_stringish_test ("hibob__93", "hibob__93", IDENT);
|
||
rust_lex_stringish_test ("thread", "thread", IDENT);
|
||
|
||
rust_lex_stringish_test ("\"string\"", "string", STRING);
|
||
rust_lex_stringish_test ("\"str\\ting\"", "str\ting", STRING);
|
||
rust_lex_stringish_test ("\"str\\\"ing\"", "str\"ing", STRING);
|
||
rust_lex_stringish_test ("r\"str\\ing\"", "str\\ing", STRING);
|
||
rust_lex_stringish_test ("r#\"str\\ting\"#", "str\\ting", STRING);
|
||
rust_lex_stringish_test ("r###\"str\\\"ing\"###", "str\\\"ing", STRING);
|
||
|
||
rust_lex_stringish_test ("b\"string\"", "string", BYTESTRING);
|
||
rust_lex_stringish_test ("b\"\x73tring\"", "string", BYTESTRING);
|
||
rust_lex_stringish_test ("b\"str\\\"ing\"", "str\"ing", BYTESTRING);
|
||
rust_lex_stringish_test ("br####\"\\x73tring\"####", "\\x73tring",
|
||
BYTESTRING);
|
||
|
||
for (i = 0; i < ARRAY_SIZE (identifier_tokens); ++i)
|
||
rust_lex_test_one (identifier_tokens[i].name, identifier_tokens[i].value);
|
||
|
||
for (i = 0; i < ARRAY_SIZE (operator_tokens); ++i)
|
||
rust_lex_test_one (operator_tokens[i].name, operator_tokens[i].value);
|
||
|
||
rust_lex_test_completion ();
|
||
rust_lex_test_push_back ();
|
||
|
||
unit_testing = 0;
|
||
}
|
||
|
||
#endif /* GDB_SELF_TEST */
|
||
|
||
void
|
||
_initialize_rust_exp (void)
|
||
{
|
||
int code = regcomp (&number_regex, number_regex_text, REG_EXTENDED);
|
||
/* If the regular expression was incorrect, it was a programming
|
||
error. */
|
||
gdb_assert (code == 0);
|
||
|
||
#if GDB_SELF_TEST
|
||
register_self_test (rust_lex_tests);
|
||
#endif
|
||
}
|