mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-21 04:42:53 +08:00
3666a04883
This commits the result of running gdb/copyright.py as per our Start
of New Year procedure...
gdb/ChangeLog
Update copyright year range in copyright header of all GDB files.
2847 lines
72 KiB
Plaintext
2847 lines
72 KiB
Plaintext
/* Bison parser for Rust expressions, for GDB.
|
||
Copyright (C) 2016-2021 Free Software Foundation, Inc.
|
||
|
||
This file is part of GDB.
|
||
|
||
This program is free software; you can redistribute it and/or modify
|
||
it under the terms of the GNU General Public License as published by
|
||
the Free Software Foundation; either version 3 of the License, or
|
||
(at your option) any later version.
|
||
|
||
This program is distributed in the hope that it will be useful,
|
||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
GNU General Public License for more details.
|
||
|
||
You should have received a copy of the GNU General Public License
|
||
along with this program. If not, see <http://www.gnu.org/licenses/>. */
|
||
|
||
/* The Bison manual says that %pure-parser is deprecated, but we use
|
||
it anyway because it also works with Byacc. That is also why
|
||
this uses %lex-param and %parse-param rather than the simpler
|
||
%param -- Byacc does not support the latter. */
|
||
%pure-parser
|
||
%lex-param {struct rust_parser *parser}
|
||
%parse-param {struct rust_parser *parser}
|
||
|
||
/* Removing the last conflict seems difficult. */
|
||
%expect 1
|
||
|
||
%{
|
||
|
||
#include "defs.h"
|
||
|
||
#include "block.h"
|
||
#include "charset.h"
|
||
#include "cp-support.h"
|
||
#include "gdb_obstack.h"
|
||
#include "gdb_regex.h"
|
||
#include "rust-lang.h"
|
||
#include "parser-defs.h"
|
||
#include "gdbsupport/selftest.h"
|
||
#include "value.h"
|
||
#include "gdbarch.h"
|
||
|
||
#define GDB_YY_REMAP_PREFIX rust
|
||
#include "yy-remap.h"
|
||
|
||
#define RUSTSTYPE YYSTYPE
|
||
|
||
struct rust_op;
|
||
typedef std::vector<const struct rust_op *> rust_op_vector;
|
||
|
||
/* A typed integer constant. */
|
||
|
||
struct typed_val_int
|
||
{
|
||
LONGEST val;
|
||
struct type *type;
|
||
};
|
||
|
||
/* A typed floating point constant. */
|
||
|
||
struct typed_val_float
|
||
{
|
||
gdb_byte val[16];
|
||
struct type *type;
|
||
};
|
||
|
||
/* An identifier and an expression. This is used to represent one
|
||
element of a struct initializer. */
|
||
|
||
struct set_field
|
||
{
|
||
struct stoken name;
|
||
const struct rust_op *init;
|
||
};
|
||
|
||
typedef std::vector<set_field> rust_set_vector;
|
||
|
||
%}
|
||
|
||
%union
|
||
{
|
||
/* A typed integer constant. */
|
||
struct typed_val_int typed_val_int;
|
||
|
||
/* A typed floating point constant. */
|
||
struct typed_val_float typed_val_float;
|
||
|
||
/* An identifier or string. */
|
||
struct stoken sval;
|
||
|
||
/* A token representing an opcode, like "==". */
|
||
enum exp_opcode opcode;
|
||
|
||
/* A list of expressions; for example, the arguments to a function
|
||
call. */
|
||
rust_op_vector *params;
|
||
|
||
/* A list of field initializers. */
|
||
rust_set_vector *field_inits;
|
||
|
||
/* A single field initializer. */
|
||
struct set_field one_field_init;
|
||
|
||
/* An expression. */
|
||
const struct rust_op *op;
|
||
|
||
/* A plain integer, for example used to count the number of
|
||
"super::" prefixes on a path. */
|
||
unsigned int depth;
|
||
}
|
||
|
||
%{
|
||
|
||
struct rust_parser;
|
||
static int rustyylex (YYSTYPE *, rust_parser *);
|
||
static void rustyyerror (rust_parser *parser, const char *msg);
|
||
|
||
static struct stoken make_stoken (const char *);
|
||
|
||
/* A regular expression for matching Rust numbers. This is split up
|
||
since it is very long and this gives us a way to comment the
|
||
sections. */
|
||
|
||
static const char number_regex_text[] =
|
||
/* subexpression 1: allows use of alternation, otherwise uninteresting */
|
||
"^("
|
||
/* First comes floating point. */
|
||
/* Recognize number after the decimal point, with optional
|
||
exponent and optional type suffix.
|
||
subexpression 2: allows "?", otherwise uninteresting
|
||
subexpression 3: if present, type suffix
|
||
*/
|
||
"[0-9][0-9_]*\\.[0-9][0-9_]*([eE][-+]?[0-9][0-9_]*)?(f32|f64)?"
|
||
#define FLOAT_TYPE1 3
|
||
"|"
|
||
/* Recognize exponent without decimal point, with optional type
|
||
suffix.
|
||
subexpression 4: if present, type suffix
|
||
*/
|
||
#define FLOAT_TYPE2 4
|
||
"[0-9][0-9_]*[eE][-+]?[0-9][0-9_]*(f32|f64)?"
|
||
"|"
|
||
/* "23." is a valid floating point number, but "23.e5" and
|
||
"23.f32" are not. So, handle the trailing-. case
|
||
separately. */
|
||
"[0-9][0-9_]*\\."
|
||
"|"
|
||
/* Finally come integers.
|
||
subexpression 5: text of integer
|
||
subexpression 6: if present, type suffix
|
||
subexpression 7: allows use of alternation, otherwise uninteresting
|
||
*/
|
||
#define INT_TEXT 5
|
||
#define INT_TYPE 6
|
||
"(0x[a-fA-F0-9_]+|0o[0-7_]+|0b[01_]+|[0-9][0-9_]*)"
|
||
"([iu](size|8|16|32|64))?"
|
||
")";
|
||
/* The number of subexpressions to allocate space for, including the
|
||
"0th" whole match subexpression. */
|
||
#define NUM_SUBEXPRESSIONS 8
|
||
|
||
/* The compiled number-matching regex. */
|
||
|
||
static regex_t number_regex;
|
||
|
||
/* An instance of this is created before parsing, and destroyed when
|
||
parsing is finished. */
|
||
|
||
struct rust_parser
|
||
{
|
||
rust_parser (struct parser_state *state)
|
||
: rust_ast (nullptr),
|
||
pstate (state)
|
||
{
|
||
}
|
||
|
||
~rust_parser ()
|
||
{
|
||
}
|
||
|
||
/* Create a new rust_set_vector. The storage for the new vector is
|
||
managed by this class. */
|
||
rust_set_vector *new_set_vector ()
|
||
{
|
||
rust_set_vector *result = new rust_set_vector;
|
||
set_vectors.push_back (std::unique_ptr<rust_set_vector> (result));
|
||
return result;
|
||
}
|
||
|
||
/* Create a new rust_ops_vector. The storage for the new vector is
|
||
managed by this class. */
|
||
rust_op_vector *new_op_vector ()
|
||
{
|
||
rust_op_vector *result = new rust_op_vector;
|
||
op_vectors.push_back (std::unique_ptr<rust_op_vector> (result));
|
||
return result;
|
||
}
|
||
|
||
/* Return the parser's language. */
|
||
const struct language_defn *language () const
|
||
{
|
||
return pstate->language ();
|
||
}
|
||
|
||
/* Return the parser's gdbarch. */
|
||
struct gdbarch *arch () const
|
||
{
|
||
return pstate->gdbarch ();
|
||
}
|
||
|
||
/* A helper to look up a Rust type, or fail. This only works for
|
||
types defined by rust_language_arch_info. */
|
||
|
||
struct type *get_type (const char *name)
|
||
{
|
||
struct type *type;
|
||
|
||
type = language_lookup_primitive_type (language (), arch (), name);
|
||
if (type == NULL)
|
||
error (_("Could not find Rust type %s"), name);
|
||
return type;
|
||
}
|
||
|
||
const char *copy_name (const char *name, int len);
|
||
struct stoken concat3 (const char *s1, const char *s2, const char *s3);
|
||
const struct rust_op *crate_name (const struct rust_op *name);
|
||
const struct rust_op *super_name (const struct rust_op *ident,
|
||
unsigned int n_supers);
|
||
|
||
int lex_character (YYSTYPE *lvalp);
|
||
int lex_number (YYSTYPE *lvalp);
|
||
int lex_string (YYSTYPE *lvalp);
|
||
int lex_identifier (YYSTYPE *lvalp);
|
||
uint32_t lex_hex (int min, int max);
|
||
uint32_t lex_escape (int is_byte);
|
||
int lex_operator (YYSTYPE *lvalp);
|
||
void push_back (char c);
|
||
|
||
void update_innermost_block (struct block_symbol sym);
|
||
struct block_symbol lookup_symbol (const char *name,
|
||
const struct block *block,
|
||
const domain_enum domain);
|
||
struct type *rust_lookup_type (const char *name, const struct block *block);
|
||
std::vector<struct type *> convert_params_to_types (rust_op_vector *params);
|
||
struct type *convert_ast_to_type (const struct rust_op *operation);
|
||
const char *convert_name (const struct rust_op *operation);
|
||
void convert_params_to_expression (rust_op_vector *params,
|
||
const struct rust_op *top);
|
||
void convert_ast_to_expression (const struct rust_op *operation,
|
||
const struct rust_op *top,
|
||
bool want_type = false);
|
||
|
||
struct rust_op *ast_basic_type (enum type_code typecode);
|
||
const struct rust_op *ast_operation (enum exp_opcode opcode,
|
||
const struct rust_op *left,
|
||
const struct rust_op *right);
|
||
const struct rust_op *ast_compound_assignment
|
||
(enum exp_opcode opcode, const struct rust_op *left,
|
||
const struct rust_op *rust_op);
|
||
const struct rust_op *ast_literal (struct typed_val_int val);
|
||
const struct rust_op *ast_dliteral (struct typed_val_float val);
|
||
const struct rust_op *ast_structop (const struct rust_op *left,
|
||
const char *name,
|
||
int completing);
|
||
const struct rust_op *ast_structop_anonymous
|
||
(const struct rust_op *left, struct typed_val_int number);
|
||
const struct rust_op *ast_unary (enum exp_opcode opcode,
|
||
const struct rust_op *expr);
|
||
const struct rust_op *ast_cast (const struct rust_op *expr,
|
||
const struct rust_op *type);
|
||
const struct rust_op *ast_call_ish (enum exp_opcode opcode,
|
||
const struct rust_op *expr,
|
||
rust_op_vector *params);
|
||
const struct rust_op *ast_path (struct stoken name,
|
||
rust_op_vector *params);
|
||
const struct rust_op *ast_string (struct stoken str);
|
||
const struct rust_op *ast_struct (const struct rust_op *name,
|
||
rust_set_vector *fields);
|
||
const struct rust_op *ast_range (const struct rust_op *lhs,
|
||
const struct rust_op *rhs,
|
||
bool inclusive);
|
||
const struct rust_op *ast_array_type (const struct rust_op *lhs,
|
||
struct typed_val_int val);
|
||
const struct rust_op *ast_slice_type (const struct rust_op *type);
|
||
const struct rust_op *ast_reference_type (const struct rust_op *type);
|
||
const struct rust_op *ast_pointer_type (const struct rust_op *type,
|
||
int is_mut);
|
||
const struct rust_op *ast_function_type (const struct rust_op *result,
|
||
rust_op_vector *params);
|
||
const struct rust_op *ast_tuple_type (rust_op_vector *params);
|
||
|
||
|
||
/* A pointer to this is installed globally. */
|
||
auto_obstack obstack;
|
||
|
||
/* Result of parsing. Points into obstack. */
|
||
const struct rust_op *rust_ast;
|
||
|
||
/* This keeps track of the various vectors we allocate. */
|
||
std::vector<std::unique_ptr<rust_set_vector>> set_vectors;
|
||
std::vector<std::unique_ptr<rust_op_vector>> op_vectors;
|
||
|
||
/* The parser state gdb gave us. */
|
||
struct parser_state *pstate;
|
||
|
||
/* Depth of parentheses. */
|
||
int paren_depth = 0;
|
||
};
|
||
|
||
/* Rust AST operations. We build a tree of these; then lower them to
|
||
gdb expressions when parsing has completed. */
|
||
|
||
struct rust_op
|
||
{
|
||
/* The opcode. */
|
||
enum exp_opcode opcode;
|
||
/* If OPCODE is OP_TYPE, then this holds information about what type
|
||
is described by this node. */
|
||
enum type_code typecode;
|
||
/* Indicates whether OPCODE actually represents a compound
|
||
assignment. For example, if OPCODE is GTGT and this is false,
|
||
then this rust_op represents an ordinary ">>"; but if this is
|
||
true, then this rust_op represents ">>=". Unused in other
|
||
cases. */
|
||
unsigned int compound_assignment : 1;
|
||
/* Only used by a field expression; if set, indicates that the field
|
||
name occurred at the end of the expression and is eligible for
|
||
completion. */
|
||
unsigned int completing : 1;
|
||
/* For OP_RANGE, indicates whether the range is inclusive or
|
||
exclusive. */
|
||
unsigned int inclusive : 1;
|
||
/* Operands of expression. Which one is used and how depends on the
|
||
particular opcode. */
|
||
RUSTSTYPE left;
|
||
RUSTSTYPE right;
|
||
};
|
||
|
||
%}
|
||
|
||
%token <sval> GDBVAR
|
||
%token <sval> IDENT
|
||
%token <sval> COMPLETE
|
||
%token <typed_val_int> INTEGER
|
||
%token <typed_val_int> DECIMAL_INTEGER
|
||
%token <sval> STRING
|
||
%token <sval> BYTESTRING
|
||
%token <typed_val_float> FLOAT
|
||
%token <opcode> COMPOUND_ASSIGN
|
||
|
||
/* Keyword tokens. */
|
||
%token <voidval> KW_AS
|
||
%token <voidval> KW_IF
|
||
%token <voidval> KW_TRUE
|
||
%token <voidval> KW_FALSE
|
||
%token <voidval> KW_SUPER
|
||
%token <voidval> KW_SELF
|
||
%token <voidval> KW_MUT
|
||
%token <voidval> KW_EXTERN
|
||
%token <voidval> KW_CONST
|
||
%token <voidval> KW_FN
|
||
%token <voidval> KW_SIZEOF
|
||
|
||
/* Operator tokens. */
|
||
%token <voidval> DOTDOT
|
||
%token <voidval> DOTDOTEQ
|
||
%token <voidval> OROR
|
||
%token <voidval> ANDAND
|
||
%token <voidval> EQEQ
|
||
%token <voidval> NOTEQ
|
||
%token <voidval> LTEQ
|
||
%token <voidval> GTEQ
|
||
%token <voidval> LSH RSH
|
||
%token <voidval> COLONCOLON
|
||
%token <voidval> ARROW
|
||
|
||
%type <op> type
|
||
%type <op> path_for_expr
|
||
%type <op> identifier_path_for_expr
|
||
%type <op> path_for_type
|
||
%type <op> identifier_path_for_type
|
||
%type <op> just_identifiers_for_type
|
||
|
||
%type <params> maybe_type_list
|
||
%type <params> type_list
|
||
|
||
%type <depth> super_path
|
||
|
||
%type <op> literal
|
||
%type <op> expr
|
||
%type <op> field_expr
|
||
%type <op> idx_expr
|
||
%type <op> unop_expr
|
||
%type <op> binop_expr
|
||
%type <op> binop_expr_expr
|
||
%type <op> type_cast_expr
|
||
%type <op> assignment_expr
|
||
%type <op> compound_assignment_expr
|
||
%type <op> paren_expr
|
||
%type <op> call_expr
|
||
%type <op> path_expr
|
||
%type <op> tuple_expr
|
||
%type <op> unit_expr
|
||
%type <op> struct_expr
|
||
%type <op> array_expr
|
||
%type <op> range_expr
|
||
|
||
%type <params> expr_list
|
||
%type <params> maybe_expr_list
|
||
%type <params> paren_expr_list
|
||
|
||
%type <field_inits> struct_expr_list
|
||
%type <one_field_init> struct_expr_tail
|
||
|
||
/* Precedence. */
|
||
%nonassoc DOTDOT DOTDOTEQ
|
||
%right '=' COMPOUND_ASSIGN
|
||
%left OROR
|
||
%left ANDAND
|
||
%nonassoc EQEQ NOTEQ '<' '>' LTEQ GTEQ
|
||
%left '|'
|
||
%left '^'
|
||
%left '&'
|
||
%left LSH RSH
|
||
%left '@'
|
||
%left '+' '-'
|
||
%left '*' '/' '%'
|
||
/* These could be %precedence in Bison, but that isn't a yacc
|
||
feature. */
|
||
%left KW_AS
|
||
%left UNARY
|
||
%left '[' '.' '('
|
||
|
||
%%
|
||
|
||
start:
|
||
expr
|
||
{
|
||
/* If we are completing and see a valid parse,
|
||
rust_ast will already have been set. */
|
||
if (parser->rust_ast == NULL)
|
||
parser->rust_ast = $1;
|
||
}
|
||
;
|
||
|
||
/* Note that the Rust grammar includes a method_call_expr, but we
|
||
handle this differently, to avoid a shift/reduce conflict with
|
||
call_expr. */
|
||
expr:
|
||
literal
|
||
| path_expr
|
||
| tuple_expr
|
||
| unit_expr
|
||
| struct_expr
|
||
| field_expr
|
||
| array_expr
|
||
| idx_expr
|
||
| range_expr
|
||
| unop_expr /* Must precede call_expr because of ambiguity with
|
||
sizeof. */
|
||
| binop_expr
|
||
| paren_expr
|
||
| call_expr
|
||
;
|
||
|
||
tuple_expr:
|
||
'(' expr ',' maybe_expr_list ')'
|
||
{
|
||
$4->push_back ($2);
|
||
error (_("Tuple expressions not supported yet"));
|
||
}
|
||
;
|
||
|
||
unit_expr:
|
||
'(' ')'
|
||
{
|
||
struct typed_val_int val;
|
||
|
||
val.type
|
||
= (language_lookup_primitive_type
|
||
(parser->language (), parser->arch (),
|
||
"()"));
|
||
val.val = 0;
|
||
$$ = parser->ast_literal (val);
|
||
}
|
||
;
|
||
|
||
/* To avoid a shift/reduce conflict with call_expr, we don't handle
|
||
tuple struct expressions here, but instead when examining the
|
||
AST. */
|
||
struct_expr:
|
||
path_for_expr '{' struct_expr_list '}'
|
||
{ $$ = parser->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;
|
||
}
|
||
| IDENT
|
||
{
|
||
struct set_field sf;
|
||
|
||
sf.name = $1;
|
||
sf.init = parser->ast_path ($1, NULL);
|
||
$$ = sf;
|
||
}
|
||
;
|
||
|
||
struct_expr_list:
|
||
/* %empty */
|
||
{
|
||
$$ = parser->new_set_vector ();
|
||
}
|
||
| struct_expr_tail
|
||
{
|
||
rust_set_vector *result = 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;
|
||
}
|
||
| IDENT ',' struct_expr_list
|
||
{
|
||
struct set_field sf;
|
||
|
||
sf.name = $1;
|
||
sf.init = parser->ast_path ($1, NULL);
|
||
$3->push_back (sf);
|
||
$$ = $3;
|
||
}
|
||
;
|
||
|
||
array_expr:
|
||
'[' KW_MUT expr_list ']'
|
||
{ $$ = parser->ast_call_ish (OP_ARRAY, NULL, $3); }
|
||
| '[' expr_list ']'
|
||
{ $$ = parser->ast_call_ish (OP_ARRAY, NULL, $2); }
|
||
| '[' KW_MUT expr ';' expr ']'
|
||
{ $$ = parser->ast_operation (OP_RUST_ARRAY, $3, $5); }
|
||
| '[' expr ';' expr ']'
|
||
{ $$ = parser->ast_operation (OP_RUST_ARRAY, $2, $4); }
|
||
;
|
||
|
||
range_expr:
|
||
expr DOTDOT
|
||
{ $$ = parser->ast_range ($1, NULL, false); }
|
||
| expr DOTDOT expr
|
||
{ $$ = parser->ast_range ($1, $3, false); }
|
||
| expr DOTDOTEQ expr
|
||
{ $$ = parser->ast_range ($1, $3, true); }
|
||
| DOTDOT expr
|
||
{ $$ = parser->ast_range (NULL, $2, false); }
|
||
| DOTDOTEQ expr
|
||
{ $$ = parser->ast_range (NULL, $2, true); }
|
||
| DOTDOT
|
||
{ $$ = parser->ast_range (NULL, NULL, false); }
|
||
;
|
||
|
||
literal:
|
||
INTEGER
|
||
{ $$ = parser->ast_literal ($1); }
|
||
| DECIMAL_INTEGER
|
||
{ $$ = parser->ast_literal ($1); }
|
||
| FLOAT
|
||
{ $$ = parser->ast_dliteral ($1); }
|
||
| STRING
|
||
{
|
||
struct set_field field;
|
||
struct typed_val_int val;
|
||
struct stoken token;
|
||
|
||
rust_set_vector *fields = 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 = parser->ast_unary (UNOP_ADDR,
|
||
parser->ast_string ($1));
|
||
fields->push_back (field);
|
||
|
||
val.type = parser->get_type ("usize");
|
||
val.val = $1.length;
|
||
|
||
field.name.ptr = "length";
|
||
field.name.length = strlen (field.name.ptr);
|
||
field.init = parser->ast_literal (val);
|
||
fields->push_back (field);
|
||
|
||
token.ptr = "&str";
|
||
token.length = strlen (token.ptr);
|
||
$$ = parser->ast_struct (parser->ast_path (token, NULL),
|
||
fields);
|
||
}
|
||
| BYTESTRING
|
||
{ $$ = parser->ast_string ($1); }
|
||
| KW_TRUE
|
||
{
|
||
struct typed_val_int val;
|
||
|
||
val.type = language_bool_type (parser->language (),
|
||
parser->arch ());
|
||
val.val = 1;
|
||
$$ = parser->ast_literal (val);
|
||
}
|
||
| KW_FALSE
|
||
{
|
||
struct typed_val_int val;
|
||
|
||
val.type = language_bool_type (parser->language (),
|
||
parser->arch ());
|
||
val.val = 0;
|
||
$$ = parser->ast_literal (val);
|
||
}
|
||
;
|
||
|
||
field_expr:
|
||
expr '.' IDENT
|
||
{ $$ = parser->ast_structop ($1, $3.ptr, 0); }
|
||
| expr '.' COMPLETE
|
||
{
|
||
$$ = parser->ast_structop ($1, $3.ptr, 1);
|
||
parser->rust_ast = $$;
|
||
}
|
||
| expr '.' DECIMAL_INTEGER
|
||
{ $$ = parser->ast_structop_anonymous ($1, $3); }
|
||
;
|
||
|
||
idx_expr:
|
||
expr '[' expr ']'
|
||
{ $$ = parser->ast_operation (BINOP_SUBSCRIPT, $1, $3); }
|
||
;
|
||
|
||
unop_expr:
|
||
'+' expr %prec UNARY
|
||
{ $$ = parser->ast_unary (UNOP_PLUS, $2); }
|
||
|
||
| '-' expr %prec UNARY
|
||
{ $$ = parser->ast_unary (UNOP_NEG, $2); }
|
||
|
||
| '!' expr %prec UNARY
|
||
{
|
||
/* Note that we provide a Rust-specific evaluator
|
||
override for UNOP_COMPLEMENT, so it can do the
|
||
right thing for both bool and integral
|
||
values. */
|
||
$$ = parser->ast_unary (UNOP_COMPLEMENT, $2);
|
||
}
|
||
|
||
| '*' expr %prec UNARY
|
||
{ $$ = parser->ast_unary (UNOP_IND, $2); }
|
||
|
||
| '&' expr %prec UNARY
|
||
{ $$ = parser->ast_unary (UNOP_ADDR, $2); }
|
||
|
||
| '&' KW_MUT expr %prec UNARY
|
||
{ $$ = parser->ast_unary (UNOP_ADDR, $3); }
|
||
| KW_SIZEOF '(' expr ')' %prec UNARY
|
||
{ $$ = parser->ast_unary (UNOP_SIZEOF, $3); }
|
||
;
|
||
|
||
binop_expr:
|
||
binop_expr_expr
|
||
| type_cast_expr
|
||
| assignment_expr
|
||
| compound_assignment_expr
|
||
;
|
||
|
||
binop_expr_expr:
|
||
expr '*' expr
|
||
{ $$ = parser->ast_operation (BINOP_MUL, $1, $3); }
|
||
|
||
| expr '@' expr
|
||
{ $$ = parser->ast_operation (BINOP_REPEAT, $1, $3); }
|
||
|
||
| expr '/' expr
|
||
{ $$ = parser->ast_operation (BINOP_DIV, $1, $3); }
|
||
|
||
| expr '%' expr
|
||
{ $$ = parser->ast_operation (BINOP_REM, $1, $3); }
|
||
|
||
| expr '<' expr
|
||
{ $$ = parser->ast_operation (BINOP_LESS, $1, $3); }
|
||
|
||
| expr '>' expr
|
||
{ $$ = parser->ast_operation (BINOP_GTR, $1, $3); }
|
||
|
||
| expr '&' expr
|
||
{ $$ = parser->ast_operation (BINOP_BITWISE_AND, $1, $3); }
|
||
|
||
| expr '|' expr
|
||
{ $$ = parser->ast_operation (BINOP_BITWISE_IOR, $1, $3); }
|
||
|
||
| expr '^' expr
|
||
{ $$ = parser->ast_operation (BINOP_BITWISE_XOR, $1, $3); }
|
||
|
||
| expr '+' expr
|
||
{ $$ = parser->ast_operation (BINOP_ADD, $1, $3); }
|
||
|
||
| expr '-' expr
|
||
{ $$ = parser->ast_operation (BINOP_SUB, $1, $3); }
|
||
|
||
| expr OROR expr
|
||
{ $$ = parser->ast_operation (BINOP_LOGICAL_OR, $1, $3); }
|
||
|
||
| expr ANDAND expr
|
||
{ $$ = parser->ast_operation (BINOP_LOGICAL_AND, $1, $3); }
|
||
|
||
| expr EQEQ expr
|
||
{ $$ = parser->ast_operation (BINOP_EQUAL, $1, $3); }
|
||
|
||
| expr NOTEQ expr
|
||
{ $$ = parser->ast_operation (BINOP_NOTEQUAL, $1, $3); }
|
||
|
||
| expr LTEQ expr
|
||
{ $$ = parser->ast_operation (BINOP_LEQ, $1, $3); }
|
||
|
||
| expr GTEQ expr
|
||
{ $$ = parser->ast_operation (BINOP_GEQ, $1, $3); }
|
||
|
||
| expr LSH expr
|
||
{ $$ = parser->ast_operation (BINOP_LSH, $1, $3); }
|
||
|
||
| expr RSH expr
|
||
{ $$ = parser->ast_operation (BINOP_RSH, $1, $3); }
|
||
;
|
||
|
||
type_cast_expr:
|
||
expr KW_AS type
|
||
{ $$ = parser->ast_cast ($1, $3); }
|
||
;
|
||
|
||
assignment_expr:
|
||
expr '=' expr
|
||
{ $$ = parser->ast_operation (BINOP_ASSIGN, $1, $3); }
|
||
;
|
||
|
||
compound_assignment_expr:
|
||
expr COMPOUND_ASSIGN expr
|
||
{ $$ = parser->ast_compound_assignment ($2, $1, $3); }
|
||
|
||
;
|
||
|
||
paren_expr:
|
||
'(' expr ')'
|
||
{ $$ = $2; }
|
||
;
|
||
|
||
expr_list:
|
||
expr
|
||
{
|
||
$$ = 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. */
|
||
$$ = parser->new_op_vector ();
|
||
}
|
||
| expr_list
|
||
{ $$ = $1; }
|
||
;
|
||
|
||
paren_expr_list:
|
||
'(' maybe_expr_list ')'
|
||
{ $$ = $2; }
|
||
;
|
||
|
||
call_expr:
|
||
expr paren_expr_list
|
||
{ $$ = parser->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
|
||
{ $$ = $1; }
|
||
| GDBVAR
|
||
{ $$ = parser->ast_path ($1, NULL); }
|
||
| KW_SELF
|
||
{ $$ = parser->ast_path (make_stoken ("self"), NULL); }
|
||
;
|
||
|
||
path_for_expr:
|
||
identifier_path_for_expr
|
||
| KW_SELF COLONCOLON identifier_path_for_expr
|
||
{ $$ = parser->super_name ($3, 0); }
|
||
| maybe_self_path super_path identifier_path_for_expr
|
||
{ $$ = parser->super_name ($3, $2); }
|
||
| COLONCOLON identifier_path_for_expr
|
||
{ $$ = parser->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. */
|
||
$$ = parser->ast_path (parser->concat3 ("::",
|
||
$2->left.sval.ptr,
|
||
NULL),
|
||
$2->right.params);
|
||
}
|
||
;
|
||
|
||
identifier_path_for_expr:
|
||
IDENT
|
||
{ $$ = parser->ast_path ($1, NULL); }
|
||
| identifier_path_for_expr COLONCOLON IDENT
|
||
{
|
||
$$ = parser->ast_path (parser->concat3 ($1->left.sval.ptr,
|
||
"::", $3.ptr),
|
||
NULL);
|
||
}
|
||
| identifier_path_for_expr COLONCOLON '<' type_list '>'
|
||
{ $$ = parser->ast_path ($1->left.sval, $4); }
|
||
| identifier_path_for_expr COLONCOLON '<' type_list RSH
|
||
{
|
||
$$ = parser->ast_path ($1->left.sval, $4);
|
||
parser->push_back ('>');
|
||
}
|
||
;
|
||
|
||
path_for_type:
|
||
identifier_path_for_type
|
||
| KW_SELF COLONCOLON identifier_path_for_type
|
||
{ $$ = parser->super_name ($3, 0); }
|
||
| maybe_self_path super_path identifier_path_for_type
|
||
{ $$ = parser->super_name ($3, $2); }
|
||
| COLONCOLON identifier_path_for_type
|
||
{ $$ = parser->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. */
|
||
$$ = parser->ast_path (parser->concat3 ("::",
|
||
$2->left.sval.ptr,
|
||
NULL),
|
||
$2->right.params);
|
||
}
|
||
;
|
||
|
||
just_identifiers_for_type:
|
||
IDENT
|
||
{ $$ = parser->ast_path ($1, NULL); }
|
||
| just_identifiers_for_type COLONCOLON IDENT
|
||
{
|
||
$$ = parser->ast_path (parser->concat3 ($1->left.sval.ptr,
|
||
"::", $3.ptr),
|
||
NULL);
|
||
}
|
||
;
|
||
|
||
identifier_path_for_type:
|
||
just_identifiers_for_type
|
||
| just_identifiers_for_type '<' type_list '>'
|
||
{ $$ = parser->ast_path ($1->left.sval, $3); }
|
||
| just_identifiers_for_type '<' type_list RSH
|
||
{
|
||
$$ = parser->ast_path ($1->left.sval, $3);
|
||
parser->push_back ('>');
|
||
}
|
||
;
|
||
|
||
type:
|
||
path_for_type
|
||
| '[' type ';' INTEGER ']'
|
||
{ $$ = parser->ast_array_type ($2, $4); }
|
||
| '[' type ';' DECIMAL_INTEGER ']'
|
||
{ $$ = parser->ast_array_type ($2, $4); }
|
||
| '&' '[' type ']'
|
||
{ $$ = parser->ast_slice_type ($3); }
|
||
| '&' type
|
||
{ $$ = parser->ast_reference_type ($2); }
|
||
| '*' KW_MUT type
|
||
{ $$ = parser->ast_pointer_type ($3, 1); }
|
||
| '*' KW_CONST type
|
||
{ $$ = parser->ast_pointer_type ($3, 0); }
|
||
| KW_FN '(' maybe_type_list ')' ARROW type
|
||
{ $$ = parser->ast_function_type ($6, $3); }
|
||
| '(' maybe_type_list ')'
|
||
{ $$ = parser->ast_tuple_type ($2); }
|
||
;
|
||
|
||
maybe_type_list:
|
||
/* %empty */
|
||
{ $$ = NULL; }
|
||
| type_list
|
||
{ $$ = $1; }
|
||
;
|
||
|
||
type_list:
|
||
type
|
||
{
|
||
rust_op_vector *result = parser->new_op_vector ();
|
||
result->push_back ($1);
|
||
$$ = 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 },
|
||
{ "..=", DOTDOTEQ, OP_NULL },
|
||
|
||
{ "::", COLONCOLON, OP_NULL },
|
||
{ "..", DOTDOT, OP_NULL },
|
||
{ "->", ARROW, OP_NULL }
|
||
};
|
||
|
||
/* Helper function to copy to the name obstack. */
|
||
|
||
const char *
|
||
rust_parser::copy_name (const char *name, int len)
|
||
{
|
||
return obstack_strndup (&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. */
|
||
|
||
struct stoken
|
||
rust_parser::concat3 (const char *s1, const char *s2, const char *s3)
|
||
{
|
||
return make_stoken (obconcat (&obstack, s1, s2, s3, (char *) NULL));
|
||
}
|
||
|
||
/* Return an AST node referring to NAME, but relative to the crate's
|
||
name. */
|
||
|
||
const struct rust_op *
|
||
rust_parser::crate_name (const struct rust_op *name)
|
||
{
|
||
std::string crate = rust_crate_for_block (pstate->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 (&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. */
|
||
|
||
const struct rust_op *
|
||
rust_parser::super_name (const struct rust_op *ident, unsigned int n_supers)
|
||
{
|
||
const char *scope = block_scope (pstate->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 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 (&obstack, "::", 2);
|
||
obstack_grow (&obstack, scope, offset);
|
||
obstack_grow (&obstack, "::", 2);
|
||
obstack_grow0 (&obstack, ident->left.sval.ptr, ident->left.sval.length);
|
||
|
||
return ast_path (make_stoken ((const char *) obstack_finish (&obstack)),
|
||
ident->right.params);
|
||
}
|
||
|
||
/* A helper that updates the innermost block as appropriate. */
|
||
|
||
void
|
||
rust_parser::update_innermost_block (struct block_symbol sym)
|
||
{
|
||
if (symbol_read_needs_frame (sym.symbol))
|
||
pstate->block_tracker->update (sym);
|
||
}
|
||
|
||
/* Lex a hex number with at least MIN digits and at most MAX
|
||
digits. */
|
||
|
||
uint32_t
|
||
rust_parser::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)
|
||
&& ((pstate->lexptr[0] >= 'a' && pstate->lexptr[0] <= 'f')
|
||
|| (pstate->lexptr[0] >= 'A' && pstate->lexptr[0] <= 'F')
|
||
|| (pstate->lexptr[0] >= '0' && pstate->lexptr[0] <= '9')))
|
||
{
|
||
result *= 16;
|
||
if (pstate->lexptr[0] >= 'a' && pstate->lexptr[0] <= 'f')
|
||
result = result + 10 + pstate->lexptr[0] - 'a';
|
||
else if (pstate->lexptr[0] >= 'A' && pstate->lexptr[0] <= 'F')
|
||
result = result + 10 + pstate->lexptr[0] - 'A';
|
||
else
|
||
result = result + pstate->lexptr[0] - '0';
|
||
++pstate->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. */
|
||
|
||
uint32_t
|
||
rust_parser::lex_escape (int is_byte)
|
||
{
|
||
uint32_t result;
|
||
|
||
gdb_assert (pstate->lexptr[0] == '\\');
|
||
++pstate->lexptr;
|
||
switch (pstate->lexptr[0])
|
||
{
|
||
case 'x':
|
||
++pstate->lexptr;
|
||
result = lex_hex (2, 2);
|
||
break;
|
||
|
||
case 'u':
|
||
if (is_byte)
|
||
error (_("Unicode escape in byte literal"));
|
||
++pstate->lexptr;
|
||
if (pstate->lexptr[0] != '{')
|
||
error (_("Missing '{' in Unicode escape"));
|
||
++pstate->lexptr;
|
||
result = lex_hex (1, 6);
|
||
/* Could do range checks here. */
|
||
if (pstate->lexptr[0] != '}')
|
||
error (_("Missing '}' in Unicode escape"));
|
||
++pstate->lexptr;
|
||
break;
|
||
|
||
case 'n':
|
||
result = '\n';
|
||
++pstate->lexptr;
|
||
break;
|
||
case 'r':
|
||
result = '\r';
|
||
++pstate->lexptr;
|
||
break;
|
||
case 't':
|
||
result = '\t';
|
||
++pstate->lexptr;
|
||
break;
|
||
case '\\':
|
||
result = '\\';
|
||
++pstate->lexptr;
|
||
break;
|
||
case '0':
|
||
result = '\0';
|
||
++pstate->lexptr;
|
||
break;
|
||
case '\'':
|
||
result = '\'';
|
||
++pstate->lexptr;
|
||
break;
|
||
case '"':
|
||
result = '"';
|
||
++pstate->lexptr;
|
||
break;
|
||
|
||
default:
|
||
error (_("Invalid escape \\%c in literal"), pstate->lexptr[0]);
|
||
}
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Lex a character constant. */
|
||
|
||
int
|
||
rust_parser::lex_character (YYSTYPE *lvalp)
|
||
{
|
||
int is_byte = 0;
|
||
uint32_t value;
|
||
|
||
if (pstate->lexptr[0] == 'b')
|
||
{
|
||
is_byte = 1;
|
||
++pstate->lexptr;
|
||
}
|
||
gdb_assert (pstate->lexptr[0] == '\'');
|
||
++pstate->lexptr;
|
||
/* This should handle UTF-8 here. */
|
||
if (pstate->lexptr[0] == '\\')
|
||
value = lex_escape (is_byte);
|
||
else
|
||
{
|
||
value = pstate->lexptr[0] & 0xff;
|
||
++pstate->lexptr;
|
||
}
|
||
|
||
if (pstate->lexptr[0] != '\'')
|
||
error (_("Unterminated character literal"));
|
||
++pstate->lexptr;
|
||
|
||
lvalp->typed_val_int.val = value;
|
||
lvalp->typed_val_int.type = get_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. */
|
||
|
||
int
|
||
rust_parser::lex_string (YYSTYPE *lvalp)
|
||
{
|
||
int is_byte = pstate->lexptr[0] == 'b';
|
||
int raw_length;
|
||
|
||
if (is_byte)
|
||
++pstate->lexptr;
|
||
raw_length = starts_raw_string (pstate->lexptr);
|
||
pstate->lexptr += raw_length;
|
||
gdb_assert (pstate->lexptr[0] == '"');
|
||
++pstate->lexptr;
|
||
|
||
while (1)
|
||
{
|
||
uint32_t value;
|
||
|
||
if (raw_length > 0)
|
||
{
|
||
if (pstate->lexptr[0] == '"' && ends_raw_string (pstate->lexptr,
|
||
raw_length - 1))
|
||
{
|
||
/* Exit with lexptr pointing after the final "#". */
|
||
pstate->lexptr += raw_length;
|
||
break;
|
||
}
|
||
else if (pstate->lexptr[0] == '\0')
|
||
error (_("Unexpected EOF in string"));
|
||
|
||
value = pstate->lexptr[0] & 0xff;
|
||
if (is_byte && value > 127)
|
||
error (_("Non-ASCII value in raw byte string"));
|
||
obstack_1grow (&obstack, value);
|
||
|
||
++pstate->lexptr;
|
||
}
|
||
else if (pstate->lexptr[0] == '"')
|
||
{
|
||
/* Make sure to skip the quote. */
|
||
++pstate->lexptr;
|
||
break;
|
||
}
|
||
else if (pstate->lexptr[0] == '\\')
|
||
{
|
||
value = lex_escape (is_byte);
|
||
|
||
if (is_byte)
|
||
obstack_1grow (&obstack, value);
|
||
else
|
||
convert_between_encodings ("UTF-32", "UTF-8", (gdb_byte *) &value,
|
||
sizeof (value), sizeof (value),
|
||
&obstack, translit_none);
|
||
}
|
||
else if (pstate->lexptr[0] == '\0')
|
||
error (_("Unexpected EOF in string"));
|
||
else
|
||
{
|
||
value = pstate->lexptr[0] & 0xff;
|
||
if (is_byte && value > 127)
|
||
error (_("Non-ASCII value in byte string"));
|
||
obstack_1grow (&obstack, value);
|
||
++pstate->lexptr;
|
||
}
|
||
}
|
||
|
||
lvalp->sval.length = obstack_object_size (&obstack);
|
||
lvalp->sval.ptr = (const char *) obstack_finish (&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. */
|
||
|
||
int
|
||
rust_parser::lex_identifier (YYSTYPE *lvalp)
|
||
{
|
||
const char *start = pstate->lexptr;
|
||
unsigned int length;
|
||
const struct token_info *token;
|
||
int i;
|
||
int is_gdb_var = pstate->lexptr[0] == '$';
|
||
|
||
gdb_assert (rust_identifier_start_p (pstate->lexptr[0]));
|
||
|
||
++pstate->lexptr;
|
||
|
||
/* For the time being this doesn't handle Unicode rules. Non-ASCII
|
||
identifiers are gated anyway. */
|
||
while ((pstate->lexptr[0] >= 'a' && pstate->lexptr[0] <= 'z')
|
||
|| (pstate->lexptr[0] >= 'A' && pstate->lexptr[0] <= 'Z')
|
||
|| pstate->lexptr[0] == '_'
|
||
|| (is_gdb_var && pstate->lexptr[0] == '$')
|
||
|| (pstate->lexptr[0] >= '0' && pstate->lexptr[0] <= '9'))
|
||
++pstate->lexptr;
|
||
|
||
|
||
length = pstate->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. */
|
||
pstate->lexptr = start;
|
||
return 0;
|
||
}
|
||
}
|
||
else if (token == NULL
|
||
&& (strncmp (start, "thread", length) == 0
|
||
|| strncmp (start, "task", length) == 0)
|
||
&& space_then_number (pstate->lexptr))
|
||
{
|
||
/* "task" or "thread" followed by a number terminates the
|
||
parse, per gdb rules. */
|
||
pstate->lexptr = start;
|
||
return 0;
|
||
}
|
||
|
||
if (token == NULL || (pstate->parse_completion && pstate->lexptr[0] == '\0'))
|
||
lvalp->sval = make_stoken (copy_name (start, length));
|
||
|
||
if (pstate->parse_completion && pstate->lexptr[0] == '\0')
|
||
{
|
||
/* Prevent rustyylex from returning two COMPLETE tokens. */
|
||
pstate->prev_lexptr = pstate->lexptr;
|
||
return COMPLETE;
|
||
}
|
||
|
||
if (token != NULL)
|
||
return token->value;
|
||
if (is_gdb_var)
|
||
return GDBVAR;
|
||
return IDENT;
|
||
}
|
||
|
||
/* Lex an operator. */
|
||
|
||
int
|
||
rust_parser::lex_operator (YYSTYPE *lvalp)
|
||
{
|
||
const struct token_info *token = NULL;
|
||
int i;
|
||
|
||
for (i = 0; i < ARRAY_SIZE (operator_tokens); ++i)
|
||
{
|
||
if (strncmp (operator_tokens[i].name, pstate->lexptr,
|
||
strlen (operator_tokens[i].name)) == 0)
|
||
{
|
||
pstate->lexptr += strlen (operator_tokens[i].name);
|
||
token = &operator_tokens[i];
|
||
break;
|
||
}
|
||
}
|
||
|
||
if (token != NULL)
|
||
{
|
||
lvalp->opcode = token->opcode;
|
||
return token->value;
|
||
}
|
||
|
||
return *pstate->lexptr++;
|
||
}
|
||
|
||
/* Lex a number. */
|
||
|
||
int
|
||
rust_parser::lex_number (YYSTYPE *lvalp)
|
||
{
|
||
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, pstate->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 (pstate->lexptr[subexps[0].rm_eo - 1] == '.')
|
||
{
|
||
const char *next = skip_spaces (&pstate->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 ((pstate->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 = get_type (type_name);
|
||
|
||
/* Copy the text of the number and remove the "_"s. */
|
||
std::string number;
|
||
for (i = 0; i < end_index && pstate->lexptr[i]; ++i)
|
||
{
|
||
if (pstate->lexptr[i] == '_')
|
||
could_be_decimal = 0;
|
||
else
|
||
number.push_back (pstate->lexptr[i]);
|
||
}
|
||
|
||
/* Advance past the match. */
|
||
pstate->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 = strtoulst (number.c_str () + offset, NULL, radix);
|
||
if (implicit_i32 && value >= ((uint64_t) 1) << 31)
|
||
type = get_type ("i64");
|
||
|
||
lvalp->typed_val_int.val = value;
|
||
lvalp->typed_val_int.type = type;
|
||
}
|
||
else
|
||
{
|
||
lvalp->typed_val_float.type = type;
|
||
bool parsed = parse_float (number.c_str (), number.length (),
|
||
lvalp->typed_val_float.type,
|
||
lvalp->typed_val_float.val);
|
||
gdb_assert (parsed);
|
||
}
|
||
|
||
return is_integer ? (could_be_decimal ? DECIMAL_INTEGER : INTEGER) : FLOAT;
|
||
}
|
||
|
||
/* The lexer. */
|
||
|
||
static int
|
||
rustyylex (YYSTYPE *lvalp, rust_parser *parser)
|
||
{
|
||
struct parser_state *pstate = parser->pstate;
|
||
|
||
/* Skip all leading whitespace. */
|
||
while (pstate->lexptr[0] == ' '
|
||
|| pstate->lexptr[0] == '\t'
|
||
|| pstate->lexptr[0] == '\r'
|
||
|| pstate->lexptr[0] == '\n')
|
||
++pstate->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 (pstate->lexptr[0] == '\0' && pstate->lexptr == pstate->prev_lexptr)
|
||
return 0;
|
||
pstate->prev_lexptr = pstate->lexptr;
|
||
if (pstate->lexptr[0] == '\0')
|
||
{
|
||
if (pstate->parse_completion)
|
||
{
|
||
lvalp->sval = make_stoken ("");
|
||
return COMPLETE;
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
if (pstate->lexptr[0] >= '0' && pstate->lexptr[0] <= '9')
|
||
return parser->lex_number (lvalp);
|
||
else if (pstate->lexptr[0] == 'b' && pstate->lexptr[1] == '\'')
|
||
return parser->lex_character (lvalp);
|
||
else if (pstate->lexptr[0] == 'b' && pstate->lexptr[1] == '"')
|
||
return parser->lex_string (lvalp);
|
||
else if (pstate->lexptr[0] == 'b' && starts_raw_string (pstate->lexptr + 1))
|
||
return parser->lex_string (lvalp);
|
||
else if (starts_raw_string (pstate->lexptr))
|
||
return parser->lex_string (lvalp);
|
||
else if (rust_identifier_start_p (pstate->lexptr[0]))
|
||
return parser->lex_identifier (lvalp);
|
||
else if (pstate->lexptr[0] == '"')
|
||
return parser->lex_string (lvalp);
|
||
else if (pstate->lexptr[0] == '\'')
|
||
return parser->lex_character (lvalp);
|
||
else if (pstate->lexptr[0] == '}' || pstate->lexptr[0] == ']')
|
||
{
|
||
/* Falls through to lex_operator. */
|
||
--parser->paren_depth;
|
||
}
|
||
else if (pstate->lexptr[0] == '(' || pstate->lexptr[0] == '{')
|
||
{
|
||
/* Falls through to lex_operator. */
|
||
++parser->paren_depth;
|
||
}
|
||
else if (pstate->lexptr[0] == ',' && pstate->comma_terminates
|
||
&& parser->paren_depth == 0)
|
||
return 0;
|
||
|
||
return parser->lex_operator (lvalp);
|
||
}
|
||
|
||
/* Push back a single character to be re-lexed. */
|
||
|
||
void
|
||
rust_parser::push_back (char c)
|
||
{
|
||
/* Can't be called before any lexing. */
|
||
gdb_assert (pstate->prev_lexptr != NULL);
|
||
|
||
--pstate->lexptr;
|
||
gdb_assert (*pstate->lexptr == c);
|
||
}
|
||
|
||
|
||
|
||
/* Make an arbitrary operation and fill in the fields. */
|
||
|
||
const struct rust_op *
|
||
rust_parser::ast_operation (enum exp_opcode opcode, const struct rust_op *left,
|
||
const struct rust_op *right)
|
||
{
|
||
struct rust_op *result = OBSTACK_ZALLOC (&obstack, struct rust_op);
|
||
|
||
result->opcode = opcode;
|
||
result->left.op = left;
|
||
result->right.op = right;
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Make a compound assignment operation. */
|
||
|
||
const struct rust_op *
|
||
rust_parser::ast_compound_assignment (enum exp_opcode opcode,
|
||
const struct rust_op *left,
|
||
const struct rust_op *right)
|
||
{
|
||
struct rust_op *result = OBSTACK_ZALLOC (&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. */
|
||
|
||
const struct rust_op *
|
||
rust_parser::ast_literal (struct typed_val_int val)
|
||
{
|
||
struct rust_op *result = OBSTACK_ZALLOC (&obstack, struct rust_op);
|
||
|
||
result->opcode = OP_LONG;
|
||
result->left.typed_val_int = val;
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Make a typed floating point literal operation. */
|
||
|
||
const struct rust_op *
|
||
rust_parser::ast_dliteral (struct typed_val_float val)
|
||
{
|
||
struct rust_op *result = OBSTACK_ZALLOC (&obstack, struct rust_op);
|
||
|
||
result->opcode = OP_FLOAT;
|
||
result->left.typed_val_float = val;
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Make a unary operation. */
|
||
|
||
const struct rust_op *
|
||
rust_parser::ast_unary (enum exp_opcode opcode, const struct rust_op *expr)
|
||
{
|
||
return ast_operation (opcode, expr, NULL);
|
||
}
|
||
|
||
/* Make a cast operation. */
|
||
|
||
const struct rust_op *
|
||
rust_parser::ast_cast (const struct rust_op *expr, const struct rust_op *type)
|
||
{
|
||
struct rust_op *result = OBSTACK_ZALLOC (&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. */
|
||
|
||
const struct rust_op *
|
||
rust_parser::ast_call_ish (enum exp_opcode opcode, const struct rust_op *expr,
|
||
rust_op_vector *params)
|
||
{
|
||
struct rust_op *result = OBSTACK_ZALLOC (&obstack, struct rust_op);
|
||
|
||
result->opcode = opcode;
|
||
result->left.op = expr;
|
||
result->right.params = params;
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Make a structure creation operation. */
|
||
|
||
const struct rust_op *
|
||
rust_parser::ast_struct (const struct rust_op *name, rust_set_vector *fields)
|
||
{
|
||
struct rust_op *result = OBSTACK_ZALLOC (&obstack, struct rust_op);
|
||
|
||
result->opcode = OP_AGGREGATE;
|
||
result->left.op = name;
|
||
result->right.field_inits = fields;
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Make an identifier path. */
|
||
|
||
const struct rust_op *
|
||
rust_parser::ast_path (struct stoken path, rust_op_vector *params)
|
||
{
|
||
struct rust_op *result = OBSTACK_ZALLOC (&obstack, struct rust_op);
|
||
|
||
result->opcode = OP_VAR_VALUE;
|
||
result->left.sval = path;
|
||
result->right.params = params;
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Make a string constant operation. */
|
||
|
||
const struct rust_op *
|
||
rust_parser::ast_string (struct stoken str)
|
||
{
|
||
struct rust_op *result = OBSTACK_ZALLOC (&obstack, struct rust_op);
|
||
|
||
result->opcode = OP_STRING;
|
||
result->left.sval = str;
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Make a field expression. */
|
||
|
||
const struct rust_op *
|
||
rust_parser::ast_structop (const struct rust_op *left, const char *name,
|
||
int completing)
|
||
{
|
||
struct rust_op *result = OBSTACK_ZALLOC (&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'. */
|
||
|
||
const struct rust_op *
|
||
rust_parser::ast_structop_anonymous (const struct rust_op *left,
|
||
struct typed_val_int number)
|
||
{
|
||
struct rust_op *result = OBSTACK_ZALLOC (&obstack, struct rust_op);
|
||
|
||
result->opcode = STRUCTOP_ANONYMOUS;
|
||
result->left.op = left;
|
||
result->right.typed_val_int = number;
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Make a range operation. */
|
||
|
||
const struct rust_op *
|
||
rust_parser::ast_range (const struct rust_op *lhs, const struct rust_op *rhs,
|
||
bool inclusive)
|
||
{
|
||
struct rust_op *result = OBSTACK_ZALLOC (&obstack, struct rust_op);
|
||
|
||
result->opcode = OP_RANGE;
|
||
result->inclusive = inclusive;
|
||
result->left.op = lhs;
|
||
result->right.op = rhs;
|
||
|
||
return result;
|
||
}
|
||
|
||
/* A helper function to make a type-related AST node. */
|
||
|
||
struct rust_op *
|
||
rust_parser::ast_basic_type (enum type_code typecode)
|
||
{
|
||
struct rust_op *result = OBSTACK_ZALLOC (&obstack, struct rust_op);
|
||
|
||
result->opcode = OP_TYPE;
|
||
result->typecode = typecode;
|
||
return result;
|
||
}
|
||
|
||
/* Create an AST node describing an array type. */
|
||
|
||
const struct rust_op *
|
||
rust_parser::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. */
|
||
|
||
const struct rust_op *
|
||
rust_parser::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. */
|
||
|
||
const struct rust_op *
|
||
rust_parser::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. */
|
||
|
||
const struct rust_op *
|
||
rust_parser::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. */
|
||
|
||
const struct rust_op *
|
||
rust_parser::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. */
|
||
|
||
const struct rust_op *
|
||
rust_parser::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. */
|
||
|
||
struct block_symbol
|
||
rust_parser::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. */
|
||
|
||
struct type *
|
||
rust_parser::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 (language (), name, NULL, 1);
|
||
if (type != NULL)
|
||
return type;
|
||
|
||
/* Last chance, try a built-in type. */
|
||
return language_lookup_primitive_type (language (), arch (), name);
|
||
}
|
||
|
||
/* Convert a vector of rust_ops representing types to a vector of
|
||
types. */
|
||
|
||
std::vector<struct type *>
|
||
rust_parser::convert_params_to_types (rust_op_vector *params)
|
||
{
|
||
std::vector<struct type *> result;
|
||
|
||
if (params != nullptr)
|
||
{
|
||
for (const rust_op *op : *params)
|
||
result.push_back (convert_ast_to_type (op));
|
||
}
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Convert a rust_op representing a type to a struct type *. */
|
||
|
||
struct type *
|
||
rust_parser::convert_ast_to_type (const struct rust_op *operation)
|
||
{
|
||
struct type *type, *result = NULL;
|
||
|
||
if (operation->opcode == OP_VAR_VALUE)
|
||
{
|
||
const char *varname = convert_name (operation);
|
||
|
||
result = rust_lookup_type (varname, pstate->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 (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 = get_type ("usize");
|
||
|
||
type = convert_ast_to_type (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 (operation->left.op);
|
||
result = lookup_pointer_type (type);
|
||
break;
|
||
|
||
case TYPE_CODE_FUNC:
|
||
{
|
||
std::vector<struct type *> args
|
||
(convert_params_to_types (operation->right.params));
|
||
struct type **argtypes = NULL;
|
||
|
||
type = convert_ast_to_type (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 (operation->left.params));
|
||
int i;
|
||
const char *name;
|
||
|
||
obstack_1grow (&obstack, '(');
|
||
for (i = 0; i < args.size (); ++i)
|
||
{
|
||
std::string type_name = type_to_string (args[i]);
|
||
|
||
if (i > 0)
|
||
obstack_1grow (&obstack, ',');
|
||
obstack_grow_str (&obstack, type_name.c_str ());
|
||
}
|
||
|
||
obstack_grow_str0 (&obstack, ")");
|
||
name = (const char *) obstack_finish (&obstack);
|
||
|
||
/* We don't allow creating new tuple types (yet), but we do
|
||
allow looking up existing tuple types. */
|
||
result = rust_lookup_type (name, pstate->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. */
|
||
|
||
const char *
|
||
rust_parser::convert_name (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 (operation->right.params));
|
||
|
||
obstack_grow_str (&obstack, operation->left.sval.ptr);
|
||
obstack_1grow (&obstack, '<');
|
||
for (i = 0; i < types.size (); ++i)
|
||
{
|
||
std::string type_name = type_to_string (types[i]);
|
||
|
||
if (i > 0)
|
||
obstack_1grow (&obstack, ',');
|
||
|
||
obstack_grow_str (&obstack, type_name.c_str ());
|
||
}
|
||
obstack_grow_str0 (&obstack, ">");
|
||
|
||
return (const char *) obstack_finish (&obstack);
|
||
}
|
||
|
||
/* A helper function that converts a vec of rust_ops to a gdb
|
||
expression. */
|
||
|
||
void
|
||
rust_parser::convert_params_to_expression (rust_op_vector *params,
|
||
const struct rust_op *top)
|
||
{
|
||
for (const rust_op *elem : *params)
|
||
convert_ast_to_expression (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. */
|
||
|
||
void
|
||
rust_parser::convert_ast_to_expression (const struct rust_op *operation,
|
||
const struct rust_op *top,
|
||
bool want_type)
|
||
{
|
||
switch (operation->opcode)
|
||
{
|
||
case OP_LONG:
|
||
write_exp_elt_opcode (pstate, OP_LONG);
|
||
write_exp_elt_type (pstate, operation->left.typed_val_int.type);
|
||
write_exp_elt_longcst (pstate, operation->left.typed_val_int.val);
|
||
write_exp_elt_opcode (pstate, OP_LONG);
|
||
break;
|
||
|
||
case OP_FLOAT:
|
||
write_exp_elt_opcode (pstate, OP_FLOAT);
|
||
write_exp_elt_type (pstate, operation->left.typed_val_float.type);
|
||
write_exp_elt_floatcst (pstate, operation->left.typed_val_float.val);
|
||
write_exp_elt_opcode (pstate, OP_FLOAT);
|
||
break;
|
||
|
||
case STRUCTOP_STRUCT:
|
||
{
|
||
convert_ast_to_expression (operation->left.op, top);
|
||
|
||
if (operation->completing)
|
||
pstate->mark_struct_expression ();
|
||
write_exp_elt_opcode (pstate, STRUCTOP_STRUCT);
|
||
write_exp_string (pstate, operation->right.sval);
|
||
write_exp_elt_opcode (pstate, STRUCTOP_STRUCT);
|
||
}
|
||
break;
|
||
|
||
case STRUCTOP_ANONYMOUS:
|
||
{
|
||
convert_ast_to_expression (operation->left.op, top);
|
||
|
||
write_exp_elt_opcode (pstate, STRUCTOP_ANONYMOUS);
|
||
write_exp_elt_longcst (pstate, operation->right.typed_val_int.val);
|
||
write_exp_elt_opcode (pstate, STRUCTOP_ANONYMOUS);
|
||
}
|
||
break;
|
||
|
||
case UNOP_SIZEOF:
|
||
convert_ast_to_expression (operation->left.op, top, true);
|
||
write_exp_elt_opcode (pstate, UNOP_SIZEOF);
|
||
break;
|
||
|
||
case UNOP_PLUS:
|
||
case UNOP_NEG:
|
||
case UNOP_COMPLEMENT:
|
||
case UNOP_IND:
|
||
case UNOP_ADDR:
|
||
convert_ast_to_expression (operation->left.op, top);
|
||
write_exp_elt_opcode (pstate, 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 (operation->left.op, top);
|
||
convert_ast_to_expression (operation->right.op, top);
|
||
if (operation->compound_assignment)
|
||
{
|
||
write_exp_elt_opcode (pstate, BINOP_ASSIGN_MODIFY);
|
||
write_exp_elt_opcode (pstate, operation->opcode);
|
||
write_exp_elt_opcode (pstate, BINOP_ASSIGN_MODIFY);
|
||
}
|
||
else
|
||
write_exp_elt_opcode (pstate, operation->opcode);
|
||
|
||
if (operation->compound_assignment
|
||
|| operation->opcode == BINOP_ASSIGN)
|
||
{
|
||
struct type *type;
|
||
|
||
type = language_lookup_primitive_type (pstate->language (),
|
||
pstate->gdbarch (),
|
||
"()");
|
||
|
||
write_exp_elt_opcode (pstate, OP_LONG);
|
||
write_exp_elt_type (pstate, type);
|
||
write_exp_elt_longcst (pstate, 0);
|
||
write_exp_elt_opcode (pstate, OP_LONG);
|
||
|
||
write_exp_elt_opcode (pstate, BINOP_COMMA);
|
||
}
|
||
break;
|
||
|
||
case UNOP_CAST:
|
||
{
|
||
struct type *type = convert_ast_to_type (operation->right.op);
|
||
|
||
convert_ast_to_expression (operation->left.op, top);
|
||
write_exp_elt_opcode (pstate, UNOP_CAST);
|
||
write_exp_elt_type (pstate, type);
|
||
write_exp_elt_opcode (pstate, UNOP_CAST);
|
||
}
|
||
break;
|
||
|
||
case OP_FUNCALL:
|
||
{
|
||
if (operation->left.op->opcode == OP_VAR_VALUE)
|
||
{
|
||
struct type *type;
|
||
const char *varname = convert_name (operation->left.op);
|
||
|
||
type = rust_lookup_type (varname,
|
||
pstate->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_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 (pstate, OP_NAME);
|
||
write_exp_string (pstate, make_stoken (cell));
|
||
write_exp_elt_opcode (pstate, OP_NAME);
|
||
|
||
convert_ast_to_expression ((*params)[i], top);
|
||
}
|
||
|
||
write_exp_elt_opcode (pstate, OP_AGGREGATE);
|
||
write_exp_elt_type (pstate, type);
|
||
write_exp_elt_longcst (pstate, 2 * params->size ());
|
||
write_exp_elt_opcode (pstate, OP_AGGREGATE);
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
convert_ast_to_expression (operation->left.op, top);
|
||
convert_params_to_expression (operation->right.params, top);
|
||
write_exp_elt_opcode (pstate, OP_FUNCALL);
|
||
write_exp_elt_longcst (pstate, operation->right.params->size ());
|
||
write_exp_elt_longcst (pstate, OP_FUNCALL);
|
||
}
|
||
break;
|
||
|
||
case OP_ARRAY:
|
||
gdb_assert (operation->left.op == NULL);
|
||
convert_params_to_expression (operation->right.params, top);
|
||
write_exp_elt_opcode (pstate, OP_ARRAY);
|
||
write_exp_elt_longcst (pstate, 0);
|
||
write_exp_elt_longcst (pstate, operation->right.params->size () - 1);
|
||
write_exp_elt_longcst (pstate, OP_ARRAY);
|
||
break;
|
||
|
||
case OP_VAR_VALUE:
|
||
{
|
||
struct block_symbol sym;
|
||
const char *varname;
|
||
|
||
if (operation->left.sval.ptr[0] == '$')
|
||
{
|
||
write_dollar_variable (pstate, operation->left.sval);
|
||
break;
|
||
}
|
||
|
||
varname = convert_name (operation);
|
||
sym = lookup_symbol (varname, pstate->expression_context_block,
|
||
VAR_DOMAIN);
|
||
if (sym.symbol != NULL && SYMBOL_CLASS (sym.symbol) != LOC_TYPEDEF)
|
||
{
|
||
write_exp_elt_opcode (pstate, OP_VAR_VALUE);
|
||
write_exp_elt_block (pstate, sym.block);
|
||
write_exp_elt_sym (pstate, sym.symbol);
|
||
write_exp_elt_opcode (pstate, 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,
|
||
pstate->expression_context_block);
|
||
if (type == NULL)
|
||
error (_("No symbol '%s' in current context"), varname);
|
||
|
||
if (!want_type
|
||
&& type->code () == TYPE_CODE_STRUCT
|
||
&& type->num_fields () == 0)
|
||
{
|
||
/* A unit-like struct. */
|
||
write_exp_elt_opcode (pstate, OP_AGGREGATE);
|
||
write_exp_elt_type (pstate, type);
|
||
write_exp_elt_longcst (pstate, 0);
|
||
write_exp_elt_opcode (pstate, OP_AGGREGATE);
|
||
}
|
||
else if (want_type || operation == top)
|
||
{
|
||
write_exp_elt_opcode (pstate, OP_TYPE);
|
||
write_exp_elt_type (pstate, type);
|
||
write_exp_elt_opcode (pstate, OP_TYPE);
|
||
}
|
||
else
|
||
error (_("Found type '%s', which can't be "
|
||
"evaluated in this context"),
|
||
varname);
|
||
}
|
||
}
|
||
break;
|
||
|
||
case OP_AGGREGATE:
|
||
{
|
||
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 (pstate, OP_NAME);
|
||
write_exp_string (pstate, init.name);
|
||
write_exp_elt_opcode (pstate, OP_NAME);
|
||
++length;
|
||
}
|
||
|
||
convert_ast_to_expression (init.init, top);
|
||
++length;
|
||
|
||
if (init.name.ptr == NULL)
|
||
{
|
||
/* This is handled differently from Ada in our
|
||
evaluator. */
|
||
write_exp_elt_opcode (pstate, OP_OTHERS);
|
||
}
|
||
}
|
||
|
||
name = convert_name (operation->left.op);
|
||
type = rust_lookup_type (name, pstate->expression_context_block);
|
||
if (type == NULL)
|
||
error (_("Could not find type '%s'"), operation->left.sval.ptr);
|
||
|
||
if (type->code () != 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 (pstate, OP_AGGREGATE);
|
||
write_exp_elt_type (pstate, type);
|
||
write_exp_elt_longcst (pstate, length);
|
||
write_exp_elt_opcode (pstate, OP_AGGREGATE);
|
||
}
|
||
break;
|
||
|
||
case OP_STRING:
|
||
{
|
||
write_exp_elt_opcode (pstate, OP_STRING);
|
||
write_exp_string (pstate, operation->left.sval);
|
||
write_exp_elt_opcode (pstate, OP_STRING);
|
||
}
|
||
break;
|
||
|
||
case OP_RANGE:
|
||
{
|
||
enum range_flag kind = (RANGE_HIGH_BOUND_DEFAULT
|
||
| RANGE_LOW_BOUND_DEFAULT);
|
||
|
||
if (operation->left.op != NULL)
|
||
{
|
||
convert_ast_to_expression (operation->left.op, top);
|
||
kind &= ~RANGE_LOW_BOUND_DEFAULT;
|
||
}
|
||
if (operation->right.op != NULL)
|
||
{
|
||
convert_ast_to_expression (operation->right.op, top);
|
||
if (kind == (RANGE_HIGH_BOUND_DEFAULT | RANGE_LOW_BOUND_DEFAULT))
|
||
{
|
||
kind = RANGE_LOW_BOUND_DEFAULT;
|
||
if (!operation->inclusive)
|
||
kind |= RANGE_HIGH_BOUND_EXCLUSIVE;
|
||
}
|
||
else
|
||
{
|
||
gdb_assert (kind == RANGE_HIGH_BOUND_DEFAULT);
|
||
kind = RANGE_STANDARD;
|
||
if (!operation->inclusive)
|
||
kind |= RANGE_HIGH_BOUND_EXCLUSIVE;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/* Nothing should make an inclusive range without an upper
|
||
bound. */
|
||
gdb_assert (!operation->inclusive);
|
||
}
|
||
|
||
write_exp_elt_opcode (pstate, OP_RANGE);
|
||
write_exp_elt_longcst (pstate, kind);
|
||
write_exp_elt_opcode (pstate, OP_RANGE);
|
||
}
|
||
break;
|
||
|
||
default:
|
||
gdb_assert_not_reached ("unhandled opcode in convert_ast_to_expression");
|
||
}
|
||
}
|
||
|
||
|
||
|
||
/* The parser as exposed to gdb. */
|
||
|
||
int
|
||
rust_language::parser (struct parser_state *state) const
|
||
{
|
||
int result;
|
||
|
||
/* This sets various globals and also clears them on
|
||
destruction. */
|
||
rust_parser parser (state);
|
||
|
||
result = rustyyparse (&parser);
|
||
|
||
if (!result || (state->parse_completion && parser.rust_ast != NULL))
|
||
parser.convert_ast_to_expression (parser.rust_ast, parser.rust_ast);
|
||
|
||
return result;
|
||
}
|
||
|
||
/* The parser error handler. */
|
||
|
||
static void
|
||
rustyyerror (rust_parser *parser, const char *msg)
|
||
{
|
||
const char *where = (parser->pstate->prev_lexptr
|
||
? parser->pstate->prev_lexptr
|
||
: parser->pstate->lexptr);
|
||
error (_("%s in expression, near `%s'."), msg, where);
|
||
}
|
||
|
||
|
||
|
||
#if GDB_SELF_TEST
|
||
|
||
/* Initialize the lexer for testing. */
|
||
|
||
static void
|
||
rust_lex_test_init (rust_parser *parser, const char *input)
|
||
{
|
||
parser->pstate->prev_lexptr = NULL;
|
||
parser->pstate->lexptr = input;
|
||
parser->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 (rust_parser *parser, const char *input, int expected)
|
||
{
|
||
int token;
|
||
RUSTSTYPE result;
|
||
|
||
rust_lex_test_init (parser, input);
|
||
|
||
token = rustyylex (&result, parser);
|
||
SELF_CHECK (token == expected);
|
||
|
||
if (token)
|
||
{
|
||
RUSTSTYPE ignore;
|
||
token = rustyylex (&ignore, parser);
|
||
SELF_CHECK (token == 0);
|
||
}
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Test that INPUT lexes as the integer VALUE. */
|
||
|
||
static void
|
||
rust_lex_int_test (rust_parser *parser, const char *input,
|
||
LONGEST value, int kind)
|
||
{
|
||
RUSTSTYPE result = rust_lex_test_one (parser, 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 (rust_parser *parser, const char *input,
|
||
const char *err)
|
||
{
|
||
try
|
||
{
|
||
/* The "kind" doesn't matter. */
|
||
rust_lex_test_one (parser, input, DECIMAL_INTEGER);
|
||
SELF_CHECK (0);
|
||
}
|
||
catch (const gdb_exception_error &except)
|
||
{
|
||
SELF_CHECK (strcmp (except.what (), err) == 0);
|
||
}
|
||
}
|
||
|
||
/* Test that INPUT lexes as the identifier, string, or byte-string
|
||
VALUE. KIND holds the expected token kind. */
|
||
|
||
static void
|
||
rust_lex_stringish_test (rust_parser *parser, const char *input,
|
||
const char *value, int kind)
|
||
{
|
||
RUSTSTYPE result = rust_lex_test_one (parser, 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 (rust_parser *parser, const char *input, int len,
|
||
const int expected[])
|
||
{
|
||
int i;
|
||
|
||
parser->pstate->lexptr = input;
|
||
parser->paren_depth = 0;
|
||
|
||
for (i = 0; i < len; ++i)
|
||
{
|
||
RUSTSTYPE ignore;
|
||
int token = rustyylex (&ignore, parser);
|
||
|
||
SELF_CHECK (token == expected[i]);
|
||
}
|
||
}
|
||
|
||
/* Tests for an integer-parsing corner case. */
|
||
|
||
static void
|
||
rust_lex_test_trailing_dot (rust_parser *parser)
|
||
{
|
||
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 (parser, "23.g()", ARRAY_SIZE (expected1), expected1);
|
||
rust_lex_test_sequence (parser, "23_0.g()", ARRAY_SIZE (expected2),
|
||
expected2);
|
||
rust_lex_test_sequence (parser, "23.==()", ARRAY_SIZE (expected3),
|
||
expected3);
|
||
rust_lex_test_sequence (parser, "23..25", ARRAY_SIZE (expected4), expected4);
|
||
}
|
||
|
||
/* Tests of completion. */
|
||
|
||
static void
|
||
rust_lex_test_completion (rust_parser *parser)
|
||
{
|
||
const int expected[] = { IDENT, '.', COMPLETE, 0 };
|
||
|
||
parser->pstate->parse_completion = 1;
|
||
|
||
rust_lex_test_sequence (parser, "something.wha", ARRAY_SIZE (expected),
|
||
expected);
|
||
rust_lex_test_sequence (parser, "something.", ARRAY_SIZE (expected),
|
||
expected);
|
||
|
||
parser->pstate->parse_completion = 0;
|
||
}
|
||
|
||
/* Test pushback. */
|
||
|
||
static void
|
||
rust_lex_test_push_back (rust_parser *parser)
|
||
{
|
||
int token;
|
||
RUSTSTYPE lval;
|
||
|
||
rust_lex_test_init (parser, ">>=");
|
||
|
||
token = rustyylex (&lval, parser);
|
||
SELF_CHECK (token == COMPOUND_ASSIGN);
|
||
SELF_CHECK (lval.opcode == BINOP_RSH);
|
||
|
||
parser->push_back ('=');
|
||
|
||
token = rustyylex (&lval, parser);
|
||
SELF_CHECK (token == '=');
|
||
|
||
token = rustyylex (&lval, parser);
|
||
SELF_CHECK (token == 0);
|
||
}
|
||
|
||
/* Unit test the lexer. */
|
||
|
||
static void
|
||
rust_lex_tests (void)
|
||
{
|
||
int i;
|
||
|
||
/* Set up dummy "parser", so that rust_type works. */
|
||
struct parser_state ps (language_def (language_rust), target_gdbarch (),
|
||
nullptr, 0, 0, nullptr, 0, nullptr, false);
|
||
rust_parser parser (&ps);
|
||
|
||
rust_lex_test_one (&parser, "", 0);
|
||
rust_lex_test_one (&parser, " \t \n \r ", 0);
|
||
rust_lex_test_one (&parser, "thread 23", 0);
|
||
rust_lex_test_one (&parser, "task 23", 0);
|
||
rust_lex_test_one (&parser, "th 104", 0);
|
||
rust_lex_test_one (&parser, "ta 97", 0);
|
||
|
||
rust_lex_int_test (&parser, "'z'", 'z', INTEGER);
|
||
rust_lex_int_test (&parser, "'\\xff'", 0xff, INTEGER);
|
||
rust_lex_int_test (&parser, "'\\u{1016f}'", 0x1016f, INTEGER);
|
||
rust_lex_int_test (&parser, "b'z'", 'z', INTEGER);
|
||
rust_lex_int_test (&parser, "b'\\xfe'", 0xfe, INTEGER);
|
||
rust_lex_int_test (&parser, "b'\\xFE'", 0xfe, INTEGER);
|
||
rust_lex_int_test (&parser, "b'\\xfE'", 0xfe, INTEGER);
|
||
|
||
/* Test all escapes in both modes. */
|
||
rust_lex_int_test (&parser, "'\\n'", '\n', INTEGER);
|
||
rust_lex_int_test (&parser, "'\\r'", '\r', INTEGER);
|
||
rust_lex_int_test (&parser, "'\\t'", '\t', INTEGER);
|
||
rust_lex_int_test (&parser, "'\\\\'", '\\', INTEGER);
|
||
rust_lex_int_test (&parser, "'\\0'", '\0', INTEGER);
|
||
rust_lex_int_test (&parser, "'\\''", '\'', INTEGER);
|
||
rust_lex_int_test (&parser, "'\\\"'", '"', INTEGER);
|
||
|
||
rust_lex_int_test (&parser, "b'\\n'", '\n', INTEGER);
|
||
rust_lex_int_test (&parser, "b'\\r'", '\r', INTEGER);
|
||
rust_lex_int_test (&parser, "b'\\t'", '\t', INTEGER);
|
||
rust_lex_int_test (&parser, "b'\\\\'", '\\', INTEGER);
|
||
rust_lex_int_test (&parser, "b'\\0'", '\0', INTEGER);
|
||
rust_lex_int_test (&parser, "b'\\''", '\'', INTEGER);
|
||
rust_lex_int_test (&parser, "b'\\\"'", '"', INTEGER);
|
||
|
||
rust_lex_exception_test (&parser, "'z", "Unterminated character literal");
|
||
rust_lex_exception_test (&parser, "b'\\x0'", "Not enough hex digits seen");
|
||
rust_lex_exception_test (&parser, "b'\\u{0}'",
|
||
"Unicode escape in byte literal");
|
||
rust_lex_exception_test (&parser, "'\\x0'", "Not enough hex digits seen");
|
||
rust_lex_exception_test (&parser, "'\\u0'", "Missing '{' in Unicode escape");
|
||
rust_lex_exception_test (&parser, "'\\u{0", "Missing '}' in Unicode escape");
|
||
rust_lex_exception_test (&parser, "'\\u{0000007}", "Overlong hex escape");
|
||
rust_lex_exception_test (&parser, "'\\u{}", "Not enough hex digits seen");
|
||
rust_lex_exception_test (&parser, "'\\Q'", "Invalid escape \\Q in literal");
|
||
rust_lex_exception_test (&parser, "b'\\Q'", "Invalid escape \\Q in literal");
|
||
|
||
rust_lex_int_test (&parser, "23", 23, DECIMAL_INTEGER);
|
||
rust_lex_int_test (&parser, "2_344__29", 234429, INTEGER);
|
||
rust_lex_int_test (&parser, "0x1f", 0x1f, INTEGER);
|
||
rust_lex_int_test (&parser, "23usize", 23, INTEGER);
|
||
rust_lex_int_test (&parser, "23i32", 23, INTEGER);
|
||
rust_lex_int_test (&parser, "0x1_f", 0x1f, INTEGER);
|
||
rust_lex_int_test (&parser, "0b1_101011__", 0x6b, INTEGER);
|
||
rust_lex_int_test (&parser, "0o001177i64", 639, INTEGER);
|
||
rust_lex_int_test (&parser, "0x123456789u64", 0x123456789ull, INTEGER);
|
||
|
||
rust_lex_test_trailing_dot (&parser);
|
||
|
||
rust_lex_test_one (&parser, "23.", FLOAT);
|
||
rust_lex_test_one (&parser, "23.99f32", FLOAT);
|
||
rust_lex_test_one (&parser, "23e7", FLOAT);
|
||
rust_lex_test_one (&parser, "23E-7", FLOAT);
|
||
rust_lex_test_one (&parser, "23e+7", FLOAT);
|
||
rust_lex_test_one (&parser, "23.99e+7f64", FLOAT);
|
||
rust_lex_test_one (&parser, "23.82f32", FLOAT);
|
||
|
||
rust_lex_stringish_test (&parser, "hibob", "hibob", IDENT);
|
||
rust_lex_stringish_test (&parser, "hibob__93", "hibob__93", IDENT);
|
||
rust_lex_stringish_test (&parser, "thread", "thread", IDENT);
|
||
|
||
rust_lex_stringish_test (&parser, "\"string\"", "string", STRING);
|
||
rust_lex_stringish_test (&parser, "\"str\\ting\"", "str\ting", STRING);
|
||
rust_lex_stringish_test (&parser, "\"str\\\"ing\"", "str\"ing", STRING);
|
||
rust_lex_stringish_test (&parser, "r\"str\\ing\"", "str\\ing", STRING);
|
||
rust_lex_stringish_test (&parser, "r#\"str\\ting\"#", "str\\ting", STRING);
|
||
rust_lex_stringish_test (&parser, "r###\"str\\\"ing\"###", "str\\\"ing",
|
||
STRING);
|
||
|
||
rust_lex_stringish_test (&parser, "b\"string\"", "string", BYTESTRING);
|
||
rust_lex_stringish_test (&parser, "b\"\x73tring\"", "string", BYTESTRING);
|
||
rust_lex_stringish_test (&parser, "b\"str\\\"ing\"", "str\"ing", BYTESTRING);
|
||
rust_lex_stringish_test (&parser, "br####\"\\x73tring\"####", "\\x73tring",
|
||
BYTESTRING);
|
||
|
||
for (i = 0; i < ARRAY_SIZE (identifier_tokens); ++i)
|
||
rust_lex_test_one (&parser, identifier_tokens[i].name,
|
||
identifier_tokens[i].value);
|
||
|
||
for (i = 0; i < ARRAY_SIZE (operator_tokens); ++i)
|
||
rust_lex_test_one (&parser, operator_tokens[i].name,
|
||
operator_tokens[i].value);
|
||
|
||
rust_lex_test_completion (&parser);
|
||
rust_lex_test_push_back (&parser);
|
||
}
|
||
|
||
#endif /* GDB_SELF_TEST */
|
||
|
||
void _initialize_rust_exp ();
|
||
void
|
||
_initialize_rust_exp ()
|
||
{
|
||
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
|
||
selftests::register_test ("rust-lex", rust_lex_tests);
|
||
#endif
|
||
}
|