1 /* Bison parser for Rust expressions, for GDB.
2 Copyright (C) 2016-2019 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>. */
19 /* The Bison manual says that %pure-parser is deprecated, but we use
20 it anyway because it also works with Byacc. That is also why
21 this uses %lex-param and %parse-param rather than the simpler
22 %param -- Byacc does not support the latter. */
24 %lex-param {struct rust_parser *parser}
25 %parse-param {struct rust_parser *parser}
27 /* Removing the last conflict seems difficult. */
36 #include "cp-support.h"
37 #include "gdb_obstack.h"
38 #include "gdb_regex.h"
39 #include "rust-lang.h"
40 #include "parser-defs.h"
41 #include "common/selftest.h"
43 #include "common/vec.h"
45 #define GDB_YY_REMAP_PREFIX rust
48 #define RUSTSTYPE YYSTYPE
51 typedef std::vector<const struct rust_op *> rust_op_vector;
53 /* A typed integer constant. */
61 /* A typed floating point constant. */
63 struct typed_val_float
69 /* An identifier and an expression. This is used to represent one
70 element of a struct initializer. */
75 const struct rust_op *init;
78 typedef std::vector<set_field> rust_set_vector;
84 /* A typed integer constant. */
85 struct typed_val_int typed_val_int;
87 /* A typed floating point constant. */
88 struct typed_val_float typed_val_float;
90 /* An identifier or string. */
93 /* A token representing an opcode, like "==". */
94 enum exp_opcode opcode;
96 /* A list of expressions; for example, the arguments to a function
98 rust_op_vector *params;
100 /* A list of field initializers. */
101 rust_set_vector *field_inits;
103 /* A single field initializer. */
104 struct set_field one_field_init;
107 const struct rust_op *op;
109 /* A plain integer, for example used to count the number of
110 "super::" prefixes on a path. */
117 static int rustyylex (YYSTYPE *, rust_parser *);
118 static void rustyyerror (rust_parser *parser, const char *msg);
120 static struct stoken make_stoken (const char *);
122 /* A regular expression for matching Rust numbers. This is split up
123 since it is very long and this gives us a way to comment the
126 static const char *number_regex_text =
127 /* subexpression 1: allows use of alternation, otherwise uninteresting */
129 /* First comes floating point. */
130 /* Recognize number after the decimal point, with optional
131 exponent and optional type suffix.
132 subexpression 2: allows "?", otherwise uninteresting
133 subexpression 3: if present, type suffix
135 "[0-9][0-9_]*\\.[0-9][0-9_]*([eE][-+]?[0-9][0-9_]*)?(f32|f64)?"
136 #define FLOAT_TYPE1 3
138 /* Recognize exponent without decimal point, with optional type
140 subexpression 4: if present, type suffix
142 #define FLOAT_TYPE2 4
143 "[0-9][0-9_]*[eE][-+]?[0-9][0-9_]*(f32|f64)?"
145 /* "23." is a valid floating point number, but "23.e5" and
146 "23.f32" are not. So, handle the trailing-. case
150 /* Finally come integers.
151 subexpression 5: text of integer
152 subexpression 6: if present, type suffix
153 subexpression 7: allows use of alternation, otherwise uninteresting
157 "(0x[a-fA-F0-9_]+|0o[0-7_]+|0b[01_]+|[0-9][0-9_]*)"
158 "([iu](size|8|16|32|64))?"
160 /* The number of subexpressions to allocate space for, including the
161 "0th" whole match subexpression. */
162 #define NUM_SUBEXPRESSIONS 8
164 /* The compiled number-matching regex. */
166 static regex_t number_regex;
168 /* An instance of this is created before parsing, and destroyed when
169 parsing is finished. */
173 rust_parser (struct parser_state *state)
174 : rust_ast (nullptr),
183 /* Create a new rust_set_vector. The storage for the new vector is
184 managed by this class. */
185 rust_set_vector *new_set_vector ()
187 rust_set_vector *result = new rust_set_vector;
188 set_vectors.push_back (std::unique_ptr<rust_set_vector> (result));
192 /* Create a new rust_ops_vector. The storage for the new vector is
193 managed by this class. */
194 rust_op_vector *new_op_vector ()
196 rust_op_vector *result = new rust_op_vector;
197 op_vectors.push_back (std::unique_ptr<rust_op_vector> (result));
201 /* Return the parser's language. */
202 const struct language_defn *language () const
204 return pstate->language ();
207 /* Return the parser's gdbarch. */
208 struct gdbarch *arch () const
210 return pstate->gdbarch ();
213 /* A helper to look up a Rust type, or fail. This only works for
214 types defined by rust_language_arch_info. */
216 struct type *get_type (const char *name)
220 type = language_lookup_primitive_type (language (), arch (), name);
222 error (_("Could not find Rust type %s"), name);
226 const char *copy_name (const char *name, int len);
227 struct stoken concat3 (const char *s1, const char *s2, const char *s3);
228 const struct rust_op *crate_name (const struct rust_op *name);
229 const struct rust_op *super_name (const struct rust_op *ident,
230 unsigned int n_supers);
232 int lex_character (YYSTYPE *lvalp);
233 int lex_number (YYSTYPE *lvalp);
234 int lex_string (YYSTYPE *lvalp);
235 int lex_identifier (YYSTYPE *lvalp);
236 uint32_t lex_hex (int min, int max);
237 uint32_t lex_escape (int is_byte);
238 int lex_operator (YYSTYPE *lvalp);
239 void push_back (char c);
241 void update_innermost_block (struct block_symbol sym);
242 struct block_symbol lookup_symbol (const char *name,
243 const struct block *block,
244 const domain_enum domain);
245 struct type *rust_lookup_type (const char *name, const struct block *block);
246 std::vector<struct type *> convert_params_to_types (rust_op_vector *params);
247 struct type *convert_ast_to_type (const struct rust_op *operation);
248 const char *convert_name (const struct rust_op *operation);
249 void convert_params_to_expression (rust_op_vector *params,
250 const struct rust_op *top);
251 void convert_ast_to_expression (const struct rust_op *operation,
252 const struct rust_op *top,
253 bool want_type = false);
255 struct rust_op *ast_basic_type (enum type_code typecode);
256 const struct rust_op *ast_operation (enum exp_opcode opcode,
257 const struct rust_op *left,
258 const struct rust_op *right);
259 const struct rust_op *ast_compound_assignment
260 (enum exp_opcode opcode, const struct rust_op *left,
261 const struct rust_op *rust_op);
262 const struct rust_op *ast_literal (struct typed_val_int val);
263 const struct rust_op *ast_dliteral (struct typed_val_float val);
264 const struct rust_op *ast_structop (const struct rust_op *left,
267 const struct rust_op *ast_structop_anonymous
268 (const struct rust_op *left, struct typed_val_int number);
269 const struct rust_op *ast_unary (enum exp_opcode opcode,
270 const struct rust_op *expr);
271 const struct rust_op *ast_cast (const struct rust_op *expr,
272 const struct rust_op *type);
273 const struct rust_op *ast_call_ish (enum exp_opcode opcode,
274 const struct rust_op *expr,
275 rust_op_vector *params);
276 const struct rust_op *ast_path (struct stoken name,
277 rust_op_vector *params);
278 const struct rust_op *ast_string (struct stoken str);
279 const struct rust_op *ast_struct (const struct rust_op *name,
280 rust_set_vector *fields);
281 const struct rust_op *ast_range (const struct rust_op *lhs,
282 const struct rust_op *rhs,
284 const struct rust_op *ast_array_type (const struct rust_op *lhs,
285 struct typed_val_int val);
286 const struct rust_op *ast_slice_type (const struct rust_op *type);
287 const struct rust_op *ast_reference_type (const struct rust_op *type);
288 const struct rust_op *ast_pointer_type (const struct rust_op *type,
290 const struct rust_op *ast_function_type (const struct rust_op *result,
291 rust_op_vector *params);
292 const struct rust_op *ast_tuple_type (rust_op_vector *params);
295 /* A pointer to this is installed globally. */
296 auto_obstack obstack;
298 /* Result of parsing. Points into obstack. */
299 const struct rust_op *rust_ast;
301 /* This keeps track of the various vectors we allocate. */
302 std::vector<std::unique_ptr<rust_set_vector>> set_vectors;
303 std::vector<std::unique_ptr<rust_op_vector>> op_vectors;
305 /* The parser state gdb gave us. */
306 struct parser_state *pstate;
308 /* Depth of parentheses. */
312 /* Rust AST operations. We build a tree of these; then lower them to
313 gdb expressions when parsing has completed. */
318 enum exp_opcode opcode;
319 /* If OPCODE is OP_TYPE, then this holds information about what type
320 is described by this node. */
321 enum type_code typecode;
322 /* Indicates whether OPCODE actually represents a compound
323 assignment. For example, if OPCODE is GTGT and this is false,
324 then this rust_op represents an ordinary ">>"; but if this is
325 true, then this rust_op represents ">>=". Unused in other
327 unsigned int compound_assignment : 1;
328 /* Only used by a field expression; if set, indicates that the field
329 name occurred at the end of the expression and is eligible for
331 unsigned int completing : 1;
332 /* For OP_RANGE, indicates whether the range is inclusive or
334 unsigned int inclusive : 1;
335 /* Operands of expression. Which one is used and how depends on the
336 particular opcode. */
345 %token <sval> COMPLETE
346 %token <typed_val_int> INTEGER
347 %token <typed_val_int> DECIMAL_INTEGER
349 %token <sval> BYTESTRING
350 %token <typed_val_float> FLOAT
351 %token <opcode> COMPOUND_ASSIGN
353 /* Keyword tokens. */
354 %token <voidval> KW_AS
355 %token <voidval> KW_IF
356 %token <voidval> KW_TRUE
357 %token <voidval> KW_FALSE
358 %token <voidval> KW_SUPER
359 %token <voidval> KW_SELF
360 %token <voidval> KW_MUT
361 %token <voidval> KW_EXTERN
362 %token <voidval> KW_CONST
363 %token <voidval> KW_FN
364 %token <voidval> KW_SIZEOF
366 /* Operator tokens. */
367 %token <voidval> DOTDOT
368 %token <voidval> DOTDOTEQ
369 %token <voidval> OROR
370 %token <voidval> ANDAND
371 %token <voidval> EQEQ
372 %token <voidval> NOTEQ
373 %token <voidval> LTEQ
374 %token <voidval> GTEQ
375 %token <voidval> LSH RSH
376 %token <voidval> COLONCOLON
377 %token <voidval> ARROW
380 %type <op> path_for_expr
381 %type <op> identifier_path_for_expr
382 %type <op> path_for_type
383 %type <op> identifier_path_for_type
384 %type <op> just_identifiers_for_type
386 %type <params> maybe_type_list
387 %type <params> type_list
389 %type <depth> super_path
393 %type <op> field_expr
396 %type <op> binop_expr
397 %type <op> binop_expr_expr
398 %type <op> type_cast_expr
399 %type <op> assignment_expr
400 %type <op> compound_assignment_expr
401 %type <op> paren_expr
404 %type <op> tuple_expr
406 %type <op> struct_expr
407 %type <op> array_expr
408 %type <op> range_expr
410 %type <params> expr_list
411 %type <params> maybe_expr_list
412 %type <params> paren_expr_list
414 %type <field_inits> struct_expr_list
415 %type <one_field_init> struct_expr_tail
418 %nonassoc DOTDOT DOTDOTEQ
419 %right '=' COMPOUND_ASSIGN
422 %nonassoc EQEQ NOTEQ '<' '>' LTEQ GTEQ
430 /* These could be %precedence in Bison, but that isn't a yacc
441 /* If we are completing and see a valid parse,
442 rust_ast will already have been set. */
443 if (parser->rust_ast == NULL)
444 parser->rust_ast = $1;
448 /* Note that the Rust grammar includes a method_call_expr, but we
449 handle this differently, to avoid a shift/reduce conflict with
461 | unop_expr /* Must precede call_expr because of ambiguity with
469 '(' expr ',' maybe_expr_list ')'
472 error (_("Tuple expressions not supported yet"));
479 struct typed_val_int val;
482 = (language_lookup_primitive_type
483 (parser->language (), parser->arch (),
486 $$ = parser->ast_literal (val);
490 /* To avoid a shift/reduce conflict with call_expr, we don't handle
491 tuple struct expressions here, but instead when examining the
494 path_for_expr '{' struct_expr_list '}'
495 { $$ = parser->ast_struct ($1, $3); }
522 sf.init = parser->ast_path ($1, NULL);
530 $$ = parser->new_set_vector ();
534 rust_set_vector *result = parser->new_set_vector ();
535 result->push_back ($1);
538 | IDENT ':' expr ',' struct_expr_list
547 | IDENT ',' struct_expr_list
552 sf.init = parser->ast_path ($1, NULL);
559 '[' KW_MUT expr_list ']'
560 { $$ = parser->ast_call_ish (OP_ARRAY, NULL, $3); }
562 { $$ = parser->ast_call_ish (OP_ARRAY, NULL, $2); }
563 | '[' KW_MUT expr ';' expr ']'
564 { $$ = parser->ast_operation (OP_RUST_ARRAY, $3, $5); }
565 | '[' expr ';' expr ']'
566 { $$ = parser->ast_operation (OP_RUST_ARRAY, $2, $4); }
571 { $$ = parser->ast_range ($1, NULL, false); }
573 { $$ = parser->ast_range ($1, $3, false); }
575 { $$ = parser->ast_range ($1, $3, true); }
577 { $$ = parser->ast_range (NULL, $2, false); }
579 { $$ = parser->ast_range (NULL, $2, true); }
581 { $$ = parser->ast_range (NULL, NULL, false); }
586 { $$ = parser->ast_literal ($1); }
588 { $$ = parser->ast_literal ($1); }
590 { $$ = parser->ast_dliteral ($1); }
593 struct set_field field;
594 struct typed_val_int val;
597 rust_set_vector *fields = parser->new_set_vector ();
599 /* Wrap the raw string in the &str struct. */
600 field.name.ptr = "data_ptr";
601 field.name.length = strlen (field.name.ptr);
602 field.init = parser->ast_unary (UNOP_ADDR,
603 parser->ast_string ($1));
604 fields->push_back (field);
606 val.type = parser->get_type ("usize");
609 field.name.ptr = "length";
610 field.name.length = strlen (field.name.ptr);
611 field.init = parser->ast_literal (val);
612 fields->push_back (field);
615 token.length = strlen (token.ptr);
616 $$ = parser->ast_struct (parser->ast_path (token, NULL),
620 { $$ = parser->ast_string ($1); }
623 struct typed_val_int val;
625 val.type = language_bool_type (parser->language (),
628 $$ = parser->ast_literal (val);
632 struct typed_val_int val;
634 val.type = language_bool_type (parser->language (),
637 $$ = parser->ast_literal (val);
643 { $$ = parser->ast_structop ($1, $3.ptr, 0); }
646 $$ = parser->ast_structop ($1, $3.ptr, 1);
647 parser->rust_ast = $$;
649 | expr '.' DECIMAL_INTEGER
650 { $$ = parser->ast_structop_anonymous ($1, $3); }
655 { $$ = parser->ast_operation (BINOP_SUBSCRIPT, $1, $3); }
660 { $$ = parser->ast_unary (UNOP_PLUS, $2); }
662 | '-' expr %prec UNARY
663 { $$ = parser->ast_unary (UNOP_NEG, $2); }
665 | '!' expr %prec UNARY
667 /* Note that we provide a Rust-specific evaluator
668 override for UNOP_COMPLEMENT, so it can do the
669 right thing for both bool and integral
671 $$ = parser->ast_unary (UNOP_COMPLEMENT, $2);
674 | '*' expr %prec UNARY
675 { $$ = parser->ast_unary (UNOP_IND, $2); }
677 | '&' expr %prec UNARY
678 { $$ = parser->ast_unary (UNOP_ADDR, $2); }
680 | '&' KW_MUT expr %prec UNARY
681 { $$ = parser->ast_unary (UNOP_ADDR, $3); }
682 | KW_SIZEOF '(' expr ')' %prec UNARY
683 { $$ = parser->ast_unary (UNOP_SIZEOF, $3); }
690 | compound_assignment_expr
695 { $$ = parser->ast_operation (BINOP_MUL, $1, $3); }
698 { $$ = parser->ast_operation (BINOP_REPEAT, $1, $3); }
701 { $$ = parser->ast_operation (BINOP_DIV, $1, $3); }
704 { $$ = parser->ast_operation (BINOP_REM, $1, $3); }
707 { $$ = parser->ast_operation (BINOP_LESS, $1, $3); }
710 { $$ = parser->ast_operation (BINOP_GTR, $1, $3); }
713 { $$ = parser->ast_operation (BINOP_BITWISE_AND, $1, $3); }
716 { $$ = parser->ast_operation (BINOP_BITWISE_IOR, $1, $3); }
719 { $$ = parser->ast_operation (BINOP_BITWISE_XOR, $1, $3); }
722 { $$ = parser->ast_operation (BINOP_ADD, $1, $3); }
725 { $$ = parser->ast_operation (BINOP_SUB, $1, $3); }
728 { $$ = parser->ast_operation (BINOP_LOGICAL_OR, $1, $3); }
731 { $$ = parser->ast_operation (BINOP_LOGICAL_AND, $1, $3); }
734 { $$ = parser->ast_operation (BINOP_EQUAL, $1, $3); }
737 { $$ = parser->ast_operation (BINOP_NOTEQUAL, $1, $3); }
740 { $$ = parser->ast_operation (BINOP_LEQ, $1, $3); }
743 { $$ = parser->ast_operation (BINOP_GEQ, $1, $3); }
746 { $$ = parser->ast_operation (BINOP_LSH, $1, $3); }
749 { $$ = parser->ast_operation (BINOP_RSH, $1, $3); }
754 { $$ = parser->ast_cast ($1, $3); }
759 { $$ = parser->ast_operation (BINOP_ASSIGN, $1, $3); }
762 compound_assignment_expr:
763 expr COMPOUND_ASSIGN expr
764 { $$ = parser->ast_compound_assignment ($2, $1, $3); }
776 $$ = parser->new_op_vector ();
789 /* The result can't be NULL. */
790 $$ = parser->new_op_vector ();
797 '(' maybe_expr_list ')'
803 { $$ = parser->ast_call_ish (OP_FUNCALL, $1, $2); }
814 | super_path KW_SUPER COLONCOLON
822 { $$ = parser->ast_path ($1, NULL); }
824 { $$ = parser->ast_path (make_stoken ("self"), NULL); }
828 identifier_path_for_expr
829 | KW_SELF COLONCOLON identifier_path_for_expr
830 { $$ = parser->super_name ($3, 0); }
831 | maybe_self_path super_path identifier_path_for_expr
832 { $$ = parser->super_name ($3, $2); }
833 | COLONCOLON identifier_path_for_expr
834 { $$ = parser->crate_name ($2); }
835 | KW_EXTERN identifier_path_for_expr
837 /* This is a gdb extension to make it possible to
838 refer to items in other crates. It just bypasses
839 adding the current crate to the front of the
841 $$ = parser->ast_path (parser->concat3 ("::",
848 identifier_path_for_expr:
850 { $$ = parser->ast_path ($1, NULL); }
851 | identifier_path_for_expr COLONCOLON IDENT
853 $$ = parser->ast_path (parser->concat3 ($1->left.sval.ptr,
857 | identifier_path_for_expr COLONCOLON '<' type_list '>'
858 { $$ = parser->ast_path ($1->left.sval, $4); }
859 | identifier_path_for_expr COLONCOLON '<' type_list RSH
861 $$ = parser->ast_path ($1->left.sval, $4);
862 parser->push_back ('>');
867 identifier_path_for_type
868 | KW_SELF COLONCOLON identifier_path_for_type
869 { $$ = parser->super_name ($3, 0); }
870 | maybe_self_path super_path identifier_path_for_type
871 { $$ = parser->super_name ($3, $2); }
872 | COLONCOLON identifier_path_for_type
873 { $$ = parser->crate_name ($2); }
874 | KW_EXTERN identifier_path_for_type
876 /* This is a gdb extension to make it possible to
877 refer to items in other crates. It just bypasses
878 adding the current crate to the front of the
880 $$ = parser->ast_path (parser->concat3 ("::",
887 just_identifiers_for_type:
889 { $$ = parser->ast_path ($1, NULL); }
890 | just_identifiers_for_type COLONCOLON IDENT
892 $$ = parser->ast_path (parser->concat3 ($1->left.sval.ptr,
898 identifier_path_for_type:
899 just_identifiers_for_type
900 | just_identifiers_for_type '<' type_list '>'
901 { $$ = parser->ast_path ($1->left.sval, $3); }
902 | just_identifiers_for_type '<' type_list RSH
904 $$ = parser->ast_path ($1->left.sval, $3);
905 parser->push_back ('>');
911 | '[' type ';' INTEGER ']'
912 { $$ = parser->ast_array_type ($2, $4); }
913 | '[' type ';' DECIMAL_INTEGER ']'
914 { $$ = parser->ast_array_type ($2, $4); }
916 { $$ = parser->ast_slice_type ($3); }
918 { $$ = parser->ast_reference_type ($2); }
920 { $$ = parser->ast_pointer_type ($3, 1); }
922 { $$ = parser->ast_pointer_type ($3, 0); }
923 | KW_FN '(' maybe_type_list ')' ARROW type
924 { $$ = parser->ast_function_type ($6, $3); }
925 | '(' maybe_type_list ')'
926 { $$ = parser->ast_tuple_type ($2); }
939 rust_op_vector *result = parser->new_op_vector ();
940 result->push_back ($1);
952 /* A struct of this type is used to describe a token. */
958 enum exp_opcode opcode;
961 /* Identifier tokens. */
963 static const struct token_info identifier_tokens[] =
965 { "as", KW_AS, OP_NULL },
966 { "false", KW_FALSE, OP_NULL },
967 { "if", 0, OP_NULL },
968 { "mut", KW_MUT, OP_NULL },
969 { "const", KW_CONST, OP_NULL },
970 { "self", KW_SELF, OP_NULL },
971 { "super", KW_SUPER, OP_NULL },
972 { "true", KW_TRUE, OP_NULL },
973 { "extern", KW_EXTERN, OP_NULL },
974 { "fn", KW_FN, OP_NULL },
975 { "sizeof", KW_SIZEOF, OP_NULL },
978 /* Operator tokens, sorted longest first. */
980 static const struct token_info operator_tokens[] =
982 { ">>=", COMPOUND_ASSIGN, BINOP_RSH },
983 { "<<=", COMPOUND_ASSIGN, BINOP_LSH },
985 { "<<", LSH, OP_NULL },
986 { ">>", RSH, OP_NULL },
987 { "&&", ANDAND, OP_NULL },
988 { "||", OROR, OP_NULL },
989 { "==", EQEQ, OP_NULL },
990 { "!=", NOTEQ, OP_NULL },
991 { "<=", LTEQ, OP_NULL },
992 { ">=", GTEQ, OP_NULL },
993 { "+=", COMPOUND_ASSIGN, BINOP_ADD },
994 { "-=", COMPOUND_ASSIGN, BINOP_SUB },
995 { "*=", COMPOUND_ASSIGN, BINOP_MUL },
996 { "/=", COMPOUND_ASSIGN, BINOP_DIV },
997 { "%=", COMPOUND_ASSIGN, BINOP_REM },
998 { "&=", COMPOUND_ASSIGN, BINOP_BITWISE_AND },
999 { "|=", COMPOUND_ASSIGN, BINOP_BITWISE_IOR },
1000 { "^=", COMPOUND_ASSIGN, BINOP_BITWISE_XOR },
1001 { "..=", DOTDOTEQ, OP_NULL },
1003 { "::", COLONCOLON, OP_NULL },
1004 { "..", DOTDOT, OP_NULL },
1005 { "->", ARROW, OP_NULL }
1008 /* Helper function to copy to the name obstack. */
1011 rust_parser::copy_name (const char *name, int len)
1013 return (const char *) obstack_copy0 (&obstack, name, len);
1016 /* Helper function to make an stoken from a C string. */
1018 static struct stoken
1019 make_stoken (const char *p)
1021 struct stoken result;
1024 result.length = strlen (result.ptr);
1028 /* Helper function to concatenate three strings on the name
1032 rust_parser::concat3 (const char *s1, const char *s2, const char *s3)
1034 return make_stoken (obconcat (&obstack, s1, s2, s3, (char *) NULL));
1037 /* Return an AST node referring to NAME, but relative to the crate's
1040 const struct rust_op *
1041 rust_parser::crate_name (const struct rust_op *name)
1043 std::string crate = rust_crate_for_block (pstate->expression_context_block);
1044 struct stoken result;
1046 gdb_assert (name->opcode == OP_VAR_VALUE);
1049 error (_("Could not find crate for current location"));
1050 result = make_stoken (obconcat (&obstack, "::", crate.c_str (), "::",
1051 name->left.sval.ptr, (char *) NULL));
1053 return ast_path (result, name->right.params);
1056 /* Create an AST node referring to a "super::" qualified name. IDENT
1057 is the base name and N_SUPERS is how many "super::"s were
1058 provided. N_SUPERS can be zero. */
1060 const struct rust_op *
1061 rust_parser::super_name (const struct rust_op *ident, unsigned int n_supers)
1063 const char *scope = block_scope (pstate->expression_context_block);
1066 gdb_assert (ident->opcode == OP_VAR_VALUE);
1068 if (scope[0] == '\0')
1069 error (_("Couldn't find namespace scope for self::"));
1074 std::vector<int> offsets;
1075 unsigned int current_len;
1077 current_len = cp_find_first_component (scope);
1078 while (scope[current_len] != '\0')
1080 offsets.push_back (current_len);
1081 gdb_assert (scope[current_len] == ':');
1084 current_len += cp_find_first_component (scope
1088 len = offsets.size ();
1089 if (n_supers >= len)
1090 error (_("Too many super:: uses from '%s'"), scope);
1092 offset = offsets[len - n_supers];
1095 offset = strlen (scope);
1097 obstack_grow (&obstack, "::", 2);
1098 obstack_grow (&obstack, scope, offset);
1099 obstack_grow (&obstack, "::", 2);
1100 obstack_grow0 (&obstack, ident->left.sval.ptr, ident->left.sval.length);
1102 return ast_path (make_stoken ((const char *) obstack_finish (&obstack)),
1103 ident->right.params);
1106 /* A helper that updates the innermost block as appropriate. */
1109 rust_parser::update_innermost_block (struct block_symbol sym)
1111 if (symbol_read_needs_frame (sym.symbol))
1112 pstate->block_tracker->update (sym);
1115 /* Lex a hex number with at least MIN digits and at most MAX
1119 rust_parser::lex_hex (int min, int max)
1121 uint32_t result = 0;
1123 /* We only want to stop at MAX if we're lexing a byte escape. */
1124 int check_max = min == max;
1126 while ((check_max ? len <= max : 1)
1127 && ((pstate->lexptr[0] >= 'a' && pstate->lexptr[0] <= 'f')
1128 || (pstate->lexptr[0] >= 'A' && pstate->lexptr[0] <= 'F')
1129 || (pstate->lexptr[0] >= '0' && pstate->lexptr[0] <= '9')))
1132 if (pstate->lexptr[0] >= 'a' && pstate->lexptr[0] <= 'f')
1133 result = result + 10 + pstate->lexptr[0] - 'a';
1134 else if (pstate->lexptr[0] >= 'A' && pstate->lexptr[0] <= 'F')
1135 result = result + 10 + pstate->lexptr[0] - 'A';
1137 result = result + pstate->lexptr[0] - '0';
1143 error (_("Not enough hex digits seen"));
1146 gdb_assert (min != max);
1147 error (_("Overlong hex escape"));
1153 /* Lex an escape. IS_BYTE is true if we're lexing a byte escape;
1154 otherwise we're lexing a character escape. */
1157 rust_parser::lex_escape (int is_byte)
1161 gdb_assert (pstate->lexptr[0] == '\\');
1163 switch (pstate->lexptr[0])
1167 result = lex_hex (2, 2);
1172 error (_("Unicode escape in byte literal"));
1174 if (pstate->lexptr[0] != '{')
1175 error (_("Missing '{' in Unicode escape"));
1177 result = lex_hex (1, 6);
1178 /* Could do range checks here. */
1179 if (pstate->lexptr[0] != '}')
1180 error (_("Missing '}' in Unicode escape"));
1214 error (_("Invalid escape \\%c in literal"), pstate->lexptr[0]);
1220 /* Lex a character constant. */
1223 rust_parser::lex_character (YYSTYPE *lvalp)
1228 if (pstate->lexptr[0] == 'b')
1233 gdb_assert (pstate->lexptr[0] == '\'');
1235 /* This should handle UTF-8 here. */
1236 if (pstate->lexptr[0] == '\\')
1237 value = lex_escape (is_byte);
1240 value = pstate->lexptr[0] & 0xff;
1244 if (pstate->lexptr[0] != '\'')
1245 error (_("Unterminated character literal"));
1248 lvalp->typed_val_int.val = value;
1249 lvalp->typed_val_int.type = get_type (is_byte ? "u8" : "char");
1254 /* Return the offset of the double quote if STR looks like the start
1255 of a raw string, or 0 if STR does not start a raw string. */
1258 starts_raw_string (const char *str)
1260 const char *save = str;
1265 while (str[0] == '#')
1272 /* Return true if STR looks like the end of a raw string that had N
1273 hashes at the start. */
1276 ends_raw_string (const char *str, int n)
1280 gdb_assert (str[0] == '"');
1281 for (i = 0; i < n; ++i)
1282 if (str[i + 1] != '#')
1287 /* Lex a string constant. */
1290 rust_parser::lex_string (YYSTYPE *lvalp)
1292 int is_byte = pstate->lexptr[0] == 'b';
1297 raw_length = starts_raw_string (pstate->lexptr);
1298 pstate->lexptr += raw_length;
1299 gdb_assert (pstate->lexptr[0] == '"');
1308 if (pstate->lexptr[0] == '"' && ends_raw_string (pstate->lexptr,
1311 /* Exit with lexptr pointing after the final "#". */
1312 pstate->lexptr += raw_length;
1315 else if (pstate->lexptr[0] == '\0')
1316 error (_("Unexpected EOF in string"));
1318 value = pstate->lexptr[0] & 0xff;
1319 if (is_byte && value > 127)
1320 error (_("Non-ASCII value in raw byte string"));
1321 obstack_1grow (&obstack, value);
1325 else if (pstate->lexptr[0] == '"')
1327 /* Make sure to skip the quote. */
1331 else if (pstate->lexptr[0] == '\\')
1333 value = lex_escape (is_byte);
1336 obstack_1grow (&obstack, value);
1338 convert_between_encodings ("UTF-32", "UTF-8", (gdb_byte *) &value,
1339 sizeof (value), sizeof (value),
1340 &obstack, translit_none);
1342 else if (pstate->lexptr[0] == '\0')
1343 error (_("Unexpected EOF in string"));
1346 value = pstate->lexptr[0] & 0xff;
1347 if (is_byte && value > 127)
1348 error (_("Non-ASCII value in byte string"));
1349 obstack_1grow (&obstack, value);
1354 lvalp->sval.length = obstack_object_size (&obstack);
1355 lvalp->sval.ptr = (const char *) obstack_finish (&obstack);
1356 return is_byte ? BYTESTRING : STRING;
1359 /* Return true if STRING starts with whitespace followed by a digit. */
1362 space_then_number (const char *string)
1364 const char *p = string;
1366 while (p[0] == ' ' || p[0] == '\t')
1371 return *p >= '0' && *p <= '9';
1374 /* Return true if C can start an identifier. */
1377 rust_identifier_start_p (char c)
1379 return ((c >= 'a' && c <= 'z')
1380 || (c >= 'A' && c <= 'Z')
1385 /* Lex an identifier. */
1388 rust_parser::lex_identifier (YYSTYPE *lvalp)
1390 const char *start = pstate->lexptr;
1391 unsigned int length;
1392 const struct token_info *token;
1394 int is_gdb_var = pstate->lexptr[0] == '$';
1396 gdb_assert (rust_identifier_start_p (pstate->lexptr[0]));
1400 /* For the time being this doesn't handle Unicode rules. Non-ASCII
1401 identifiers are gated anyway. */
1402 while ((pstate->lexptr[0] >= 'a' && pstate->lexptr[0] <= 'z')
1403 || (pstate->lexptr[0] >= 'A' && pstate->lexptr[0] <= 'Z')
1404 || pstate->lexptr[0] == '_'
1405 || (is_gdb_var && pstate->lexptr[0] == '$')
1406 || (pstate->lexptr[0] >= '0' && pstate->lexptr[0] <= '9'))
1410 length = pstate->lexptr - start;
1412 for (i = 0; i < ARRAY_SIZE (identifier_tokens); ++i)
1414 if (length == strlen (identifier_tokens[i].name)
1415 && strncmp (identifier_tokens[i].name, start, length) == 0)
1417 token = &identifier_tokens[i];
1424 if (token->value == 0)
1426 /* Leave the terminating token alone. */
1427 pstate->lexptr = start;
1431 else if (token == NULL
1432 && (strncmp (start, "thread", length) == 0
1433 || strncmp (start, "task", length) == 0)
1434 && space_then_number (pstate->lexptr))
1436 /* "task" or "thread" followed by a number terminates the
1437 parse, per gdb rules. */
1438 pstate->lexptr = start;
1442 if (token == NULL || (pstate->parse_completion && pstate->lexptr[0] == '\0'))
1443 lvalp->sval = make_stoken (copy_name (start, length));
1445 if (pstate->parse_completion && pstate->lexptr[0] == '\0')
1447 /* Prevent rustyylex from returning two COMPLETE tokens. */
1448 pstate->prev_lexptr = pstate->lexptr;
1453 return token->value;
1459 /* Lex an operator. */
1462 rust_parser::lex_operator (YYSTYPE *lvalp)
1464 const struct token_info *token = NULL;
1467 for (i = 0; i < ARRAY_SIZE (operator_tokens); ++i)
1469 if (strncmp (operator_tokens[i].name, pstate->lexptr,
1470 strlen (operator_tokens[i].name)) == 0)
1472 pstate->lexptr += strlen (operator_tokens[i].name);
1473 token = &operator_tokens[i];
1480 lvalp->opcode = token->opcode;
1481 return token->value;
1484 return *pstate->lexptr++;
1490 rust_parser::lex_number (YYSTYPE *lvalp)
1492 regmatch_t subexps[NUM_SUBEXPRESSIONS];
1495 int could_be_decimal = 1;
1496 int implicit_i32 = 0;
1497 const char *type_name = NULL;
1500 int type_index = -1;
1503 match = regexec (&number_regex, pstate->lexptr, ARRAY_SIZE (subexps),
1505 /* Failure means the regexp is broken. */
1506 gdb_assert (match == 0);
1508 if (subexps[INT_TEXT].rm_so != -1)
1510 /* Integer part matched. */
1512 end_index = subexps[INT_TEXT].rm_eo;
1513 if (subexps[INT_TYPE].rm_so == -1)
1520 type_index = INT_TYPE;
1521 could_be_decimal = 0;
1524 else if (subexps[FLOAT_TYPE1].rm_so != -1)
1526 /* Found floating point type suffix. */
1527 end_index = subexps[FLOAT_TYPE1].rm_so;
1528 type_index = FLOAT_TYPE1;
1530 else if (subexps[FLOAT_TYPE2].rm_so != -1)
1532 /* Found floating point type suffix. */
1533 end_index = subexps[FLOAT_TYPE2].rm_so;
1534 type_index = FLOAT_TYPE2;
1538 /* Any other floating point match. */
1539 end_index = subexps[0].rm_eo;
1543 /* We need a special case if the final character is ".". In this
1544 case we might need to parse an integer. For example, "23.f()" is
1545 a request for a trait method call, not a syntax error involving
1546 the floating point number "23.". */
1547 gdb_assert (subexps[0].rm_eo > 0);
1548 if (pstate->lexptr[subexps[0].rm_eo - 1] == '.')
1550 const char *next = skip_spaces (&pstate->lexptr[subexps[0].rm_eo]);
1552 if (rust_identifier_start_p (*next) || *next == '.')
1556 end_index = subexps[0].rm_eo;
1558 could_be_decimal = 1;
1563 /* Compute the type name if we haven't already. */
1564 std::string type_name_holder;
1565 if (type_name == NULL)
1567 gdb_assert (type_index != -1);
1568 type_name_holder = std::string ((pstate->lexptr
1569 + subexps[type_index].rm_so),
1570 (subexps[type_index].rm_eo
1571 - subexps[type_index].rm_so));
1572 type_name = type_name_holder.c_str ();
1575 /* Look up the type. */
1576 type = get_type (type_name);
1578 /* Copy the text of the number and remove the "_"s. */
1580 for (i = 0; i < end_index && pstate->lexptr[i]; ++i)
1582 if (pstate->lexptr[i] == '_')
1583 could_be_decimal = 0;
1585 number.push_back (pstate->lexptr[i]);
1588 /* Advance past the match. */
1589 pstate->lexptr += subexps[0].rm_eo;
1591 /* Parse the number. */
1598 if (number[0] == '0')
1600 if (number[1] == 'x')
1602 else if (number[1] == 'o')
1604 else if (number[1] == 'b')
1609 could_be_decimal = 0;
1613 value = strtoulst (number.c_str () + offset, NULL, radix);
1614 if (implicit_i32 && value >= ((uint64_t) 1) << 31)
1615 type = get_type ("i64");
1617 lvalp->typed_val_int.val = value;
1618 lvalp->typed_val_int.type = type;
1622 lvalp->typed_val_float.type = type;
1623 bool parsed = parse_float (number.c_str (), number.length (),
1624 lvalp->typed_val_float.type,
1625 lvalp->typed_val_float.val);
1626 gdb_assert (parsed);
1629 return is_integer ? (could_be_decimal ? DECIMAL_INTEGER : INTEGER) : FLOAT;
1635 rustyylex (YYSTYPE *lvalp, rust_parser *parser)
1637 struct parser_state *pstate = parser->pstate;
1639 /* Skip all leading whitespace. */
1640 while (pstate->lexptr[0] == ' '
1641 || pstate->lexptr[0] == '\t'
1642 || pstate->lexptr[0] == '\r'
1643 || pstate->lexptr[0] == '\n')
1646 /* If we hit EOF and we're completing, then return COMPLETE -- maybe
1647 we're completing an empty string at the end of a field_expr.
1648 But, we don't want to return two COMPLETE tokens in a row. */
1649 if (pstate->lexptr[0] == '\0' && pstate->lexptr == pstate->prev_lexptr)
1651 pstate->prev_lexptr = pstate->lexptr;
1652 if (pstate->lexptr[0] == '\0')
1654 if (pstate->parse_completion)
1656 lvalp->sval = make_stoken ("");
1662 if (pstate->lexptr[0] >= '0' && pstate->lexptr[0] <= '9')
1663 return parser->lex_number (lvalp);
1664 else if (pstate->lexptr[0] == 'b' && pstate->lexptr[1] == '\'')
1665 return parser->lex_character (lvalp);
1666 else if (pstate->lexptr[0] == 'b' && pstate->lexptr[1] == '"')
1667 return parser->lex_string (lvalp);
1668 else if (pstate->lexptr[0] == 'b' && starts_raw_string (pstate->lexptr + 1))
1669 return parser->lex_string (lvalp);
1670 else if (starts_raw_string (pstate->lexptr))
1671 return parser->lex_string (lvalp);
1672 else if (rust_identifier_start_p (pstate->lexptr[0]))
1673 return parser->lex_identifier (lvalp);
1674 else if (pstate->lexptr[0] == '"')
1675 return parser->lex_string (lvalp);
1676 else if (pstate->lexptr[0] == '\'')
1677 return parser->lex_character (lvalp);
1678 else if (pstate->lexptr[0] == '}' || pstate->lexptr[0] == ']')
1680 /* Falls through to lex_operator. */
1681 --parser->paren_depth;
1683 else if (pstate->lexptr[0] == '(' || pstate->lexptr[0] == '{')
1685 /* Falls through to lex_operator. */
1686 ++parser->paren_depth;
1688 else if (pstate->lexptr[0] == ',' && pstate->comma_terminates
1689 && parser->paren_depth == 0)
1692 return parser->lex_operator (lvalp);
1695 /* Push back a single character to be re-lexed. */
1698 rust_parser::push_back (char c)
1700 /* Can't be called before any lexing. */
1701 gdb_assert (pstate->prev_lexptr != NULL);
1704 gdb_assert (*pstate->lexptr == c);
1709 /* Make an arbitrary operation and fill in the fields. */
1711 const struct rust_op *
1712 rust_parser::ast_operation (enum exp_opcode opcode, const struct rust_op *left,
1713 const struct rust_op *right)
1715 struct rust_op *result = OBSTACK_ZALLOC (&obstack, struct rust_op);
1717 result->opcode = opcode;
1718 result->left.op = left;
1719 result->right.op = right;
1724 /* Make a compound assignment operation. */
1726 const struct rust_op *
1727 rust_parser::ast_compound_assignment (enum exp_opcode opcode,
1728 const struct rust_op *left,
1729 const struct rust_op *right)
1731 struct rust_op *result = OBSTACK_ZALLOC (&obstack, struct rust_op);
1733 result->opcode = opcode;
1734 result->compound_assignment = 1;
1735 result->left.op = left;
1736 result->right.op = right;
1741 /* Make a typed integer literal operation. */
1743 const struct rust_op *
1744 rust_parser::ast_literal (struct typed_val_int val)
1746 struct rust_op *result = OBSTACK_ZALLOC (&obstack, struct rust_op);
1748 result->opcode = OP_LONG;
1749 result->left.typed_val_int = val;
1754 /* Make a typed floating point literal operation. */
1756 const struct rust_op *
1757 rust_parser::ast_dliteral (struct typed_val_float val)
1759 struct rust_op *result = OBSTACK_ZALLOC (&obstack, struct rust_op);
1761 result->opcode = OP_FLOAT;
1762 result->left.typed_val_float = val;
1767 /* Make a unary operation. */
1769 const struct rust_op *
1770 rust_parser::ast_unary (enum exp_opcode opcode, const struct rust_op *expr)
1772 return ast_operation (opcode, expr, NULL);
1775 /* Make a cast operation. */
1777 const struct rust_op *
1778 rust_parser::ast_cast (const struct rust_op *expr, const struct rust_op *type)
1780 struct rust_op *result = OBSTACK_ZALLOC (&obstack, struct rust_op);
1782 result->opcode = UNOP_CAST;
1783 result->left.op = expr;
1784 result->right.op = type;
1789 /* Make a call-like operation. This is nominally a function call, but
1790 when lowering we may discover that it actually represents the
1791 creation of a tuple struct. */
1793 const struct rust_op *
1794 rust_parser::ast_call_ish (enum exp_opcode opcode, const struct rust_op *expr,
1795 rust_op_vector *params)
1797 struct rust_op *result = OBSTACK_ZALLOC (&obstack, struct rust_op);
1799 result->opcode = opcode;
1800 result->left.op = expr;
1801 result->right.params = params;
1806 /* Make a structure creation operation. */
1808 const struct rust_op *
1809 rust_parser::ast_struct (const struct rust_op *name, rust_set_vector *fields)
1811 struct rust_op *result = OBSTACK_ZALLOC (&obstack, struct rust_op);
1813 result->opcode = OP_AGGREGATE;
1814 result->left.op = name;
1815 result->right.field_inits = fields;
1820 /* Make an identifier path. */
1822 const struct rust_op *
1823 rust_parser::ast_path (struct stoken path, rust_op_vector *params)
1825 struct rust_op *result = OBSTACK_ZALLOC (&obstack, struct rust_op);
1827 result->opcode = OP_VAR_VALUE;
1828 result->left.sval = path;
1829 result->right.params = params;
1834 /* Make a string constant operation. */
1836 const struct rust_op *
1837 rust_parser::ast_string (struct stoken str)
1839 struct rust_op *result = OBSTACK_ZALLOC (&obstack, struct rust_op);
1841 result->opcode = OP_STRING;
1842 result->left.sval = str;
1847 /* Make a field expression. */
1849 const struct rust_op *
1850 rust_parser::ast_structop (const struct rust_op *left, const char *name,
1853 struct rust_op *result = OBSTACK_ZALLOC (&obstack, struct rust_op);
1855 result->opcode = STRUCTOP_STRUCT;
1856 result->completing = completing;
1857 result->left.op = left;
1858 result->right.sval = make_stoken (name);
1863 /* Make an anonymous struct operation, like 'x.0'. */
1865 const struct rust_op *
1866 rust_parser::ast_structop_anonymous (const struct rust_op *left,
1867 struct typed_val_int number)
1869 struct rust_op *result = OBSTACK_ZALLOC (&obstack, struct rust_op);
1871 result->opcode = STRUCTOP_ANONYMOUS;
1872 result->left.op = left;
1873 result->right.typed_val_int = number;
1878 /* Make a range operation. */
1880 const struct rust_op *
1881 rust_parser::ast_range (const struct rust_op *lhs, const struct rust_op *rhs,
1884 struct rust_op *result = OBSTACK_ZALLOC (&obstack, struct rust_op);
1886 result->opcode = OP_RANGE;
1887 result->inclusive = inclusive;
1888 result->left.op = lhs;
1889 result->right.op = rhs;
1894 /* A helper function to make a type-related AST node. */
1897 rust_parser::ast_basic_type (enum type_code typecode)
1899 struct rust_op *result = OBSTACK_ZALLOC (&obstack, struct rust_op);
1901 result->opcode = OP_TYPE;
1902 result->typecode = typecode;
1906 /* Create an AST node describing an array type. */
1908 const struct rust_op *
1909 rust_parser::ast_array_type (const struct rust_op *lhs,
1910 struct typed_val_int val)
1912 struct rust_op *result = ast_basic_type (TYPE_CODE_ARRAY);
1914 result->left.op = lhs;
1915 result->right.typed_val_int = val;
1919 /* Create an AST node describing a reference type. */
1921 const struct rust_op *
1922 rust_parser::ast_slice_type (const struct rust_op *type)
1924 /* Use TYPE_CODE_COMPLEX just because it is handy. */
1925 struct rust_op *result = ast_basic_type (TYPE_CODE_COMPLEX);
1927 result->left.op = type;
1931 /* Create an AST node describing a reference type. */
1933 const struct rust_op *
1934 rust_parser::ast_reference_type (const struct rust_op *type)
1936 struct rust_op *result = ast_basic_type (TYPE_CODE_REF);
1938 result->left.op = type;
1942 /* Create an AST node describing a pointer type. */
1944 const struct rust_op *
1945 rust_parser::ast_pointer_type (const struct rust_op *type, int is_mut)
1947 struct rust_op *result = ast_basic_type (TYPE_CODE_PTR);
1949 result->left.op = type;
1950 /* For the time being we ignore is_mut. */
1954 /* Create an AST node describing a function type. */
1956 const struct rust_op *
1957 rust_parser::ast_function_type (const struct rust_op *rtype,
1958 rust_op_vector *params)
1960 struct rust_op *result = ast_basic_type (TYPE_CODE_FUNC);
1962 result->left.op = rtype;
1963 result->right.params = params;
1967 /* Create an AST node describing a tuple type. */
1969 const struct rust_op *
1970 rust_parser::ast_tuple_type (rust_op_vector *params)
1972 struct rust_op *result = ast_basic_type (TYPE_CODE_STRUCT);
1974 result->left.params = params;
1978 /* A helper to appropriately munge NAME and BLOCK depending on the
1979 presence of a leading "::". */
1982 munge_name_and_block (const char **name, const struct block **block)
1984 /* If it is a global reference, skip the current block in favor of
1985 the static block. */
1986 if (strncmp (*name, "::", 2) == 0)
1989 *block = block_static_block (*block);
1993 /* Like lookup_symbol, but handles Rust namespace conventions, and
1994 doesn't require field_of_this_result. */
1997 rust_parser::lookup_symbol (const char *name, const struct block *block,
1998 const domain_enum domain)
2000 struct block_symbol result;
2002 munge_name_and_block (&name, &block);
2004 result = ::lookup_symbol (name, block, domain, NULL);
2005 if (result.symbol != NULL)
2006 update_innermost_block (result);
2010 /* Look up a type, following Rust namespace conventions. */
2013 rust_parser::rust_lookup_type (const char *name, const struct block *block)
2015 struct block_symbol result;
2018 munge_name_and_block (&name, &block);
2020 result = ::lookup_symbol (name, block, STRUCT_DOMAIN, NULL);
2021 if (result.symbol != NULL)
2023 update_innermost_block (result);
2024 return SYMBOL_TYPE (result.symbol);
2027 type = lookup_typename (language (), arch (), name, NULL, 1);
2031 /* Last chance, try a built-in type. */
2032 return language_lookup_primitive_type (language (), arch (), name);
2035 /* Convert a vector of rust_ops representing types to a vector of
2038 std::vector<struct type *>
2039 rust_parser::convert_params_to_types (rust_op_vector *params)
2041 std::vector<struct type *> result;
2043 if (params != nullptr)
2045 for (const rust_op *op : *params)
2046 result.push_back (convert_ast_to_type (op));
2052 /* Convert a rust_op representing a type to a struct type *. */
2055 rust_parser::convert_ast_to_type (const struct rust_op *operation)
2057 struct type *type, *result = NULL;
2059 if (operation->opcode == OP_VAR_VALUE)
2061 const char *varname = convert_name (operation);
2063 result = rust_lookup_type (varname, pstate->expression_context_block);
2065 error (_("No typed name '%s' in current context"), varname);
2069 gdb_assert (operation->opcode == OP_TYPE);
2071 switch (operation->typecode)
2073 case TYPE_CODE_ARRAY:
2074 type = convert_ast_to_type (operation->left.op);
2075 if (operation->right.typed_val_int.val < 0)
2076 error (_("Negative array length"));
2077 result = lookup_array_range_type (type, 0,
2078 operation->right.typed_val_int.val - 1);
2081 case TYPE_CODE_COMPLEX:
2083 struct type *usize = get_type ("usize");
2085 type = convert_ast_to_type (operation->left.op);
2086 result = rust_slice_type ("&[*gdb*]", type, usize);
2092 /* For now we treat &x and *x identically. */
2093 type = convert_ast_to_type (operation->left.op);
2094 result = lookup_pointer_type (type);
2097 case TYPE_CODE_FUNC:
2099 std::vector<struct type *> args
2100 (convert_params_to_types (operation->right.params));
2101 struct type **argtypes = NULL;
2103 type = convert_ast_to_type (operation->left.op);
2105 argtypes = args.data ();
2108 = lookup_function_type_with_arguments (type, args.size (),
2110 result = lookup_pointer_type (result);
2114 case TYPE_CODE_STRUCT:
2116 std::vector<struct type *> args
2117 (convert_params_to_types (operation->left.params));
2121 obstack_1grow (&obstack, '(');
2122 for (i = 0; i < args.size (); ++i)
2124 std::string type_name = type_to_string (args[i]);
2127 obstack_1grow (&obstack, ',');
2128 obstack_grow_str (&obstack, type_name.c_str ());
2131 obstack_grow_str0 (&obstack, ")");
2132 name = (const char *) obstack_finish (&obstack);
2134 /* We don't allow creating new tuple types (yet), but we do
2135 allow looking up existing tuple types. */
2136 result = rust_lookup_type (name, pstate->expression_context_block);
2138 error (_("could not find tuple type '%s'"), name);
2143 gdb_assert_not_reached ("unhandled opcode in convert_ast_to_type");
2146 gdb_assert (result != NULL);
2150 /* A helper function to turn a rust_op representing a name into a full
2151 name. This applies generic arguments as needed. The returned name
2152 is allocated on the work obstack. */
2155 rust_parser::convert_name (const struct rust_op *operation)
2159 gdb_assert (operation->opcode == OP_VAR_VALUE);
2161 if (operation->right.params == NULL)
2162 return operation->left.sval.ptr;
2164 std::vector<struct type *> types
2165 (convert_params_to_types (operation->right.params));
2167 obstack_grow_str (&obstack, operation->left.sval.ptr);
2168 obstack_1grow (&obstack, '<');
2169 for (i = 0; i < types.size (); ++i)
2171 std::string type_name = type_to_string (types[i]);
2174 obstack_1grow (&obstack, ',');
2176 obstack_grow_str (&obstack, type_name.c_str ());
2178 obstack_grow_str0 (&obstack, ">");
2180 return (const char *) obstack_finish (&obstack);
2183 /* A helper function that converts a vec of rust_ops to a gdb
2187 rust_parser::convert_params_to_expression (rust_op_vector *params,
2188 const struct rust_op *top)
2190 for (const rust_op *elem : *params)
2191 convert_ast_to_expression (elem, top);
2194 /* Lower a rust_op to a gdb expression. STATE is the parser state.
2195 OPERATION is the operation to lower. TOP is a pointer to the
2196 top-most operation; it is used to handle the special case where the
2197 top-most expression is an identifier and can be optionally lowered
2198 to OP_TYPE. WANT_TYPE is a flag indicating that, if the expression
2199 is the name of a type, then emit an OP_TYPE for it (rather than
2200 erroring). If WANT_TYPE is set, then the similar TOP handling is
2204 rust_parser::convert_ast_to_expression (const struct rust_op *operation,
2205 const struct rust_op *top,
2208 switch (operation->opcode)
2211 write_exp_elt_opcode (pstate, OP_LONG);
2212 write_exp_elt_type (pstate, operation->left.typed_val_int.type);
2213 write_exp_elt_longcst (pstate, operation->left.typed_val_int.val);
2214 write_exp_elt_opcode (pstate, OP_LONG);
2218 write_exp_elt_opcode (pstate, OP_FLOAT);
2219 write_exp_elt_type (pstate, operation->left.typed_val_float.type);
2220 write_exp_elt_floatcst (pstate, operation->left.typed_val_float.val);
2221 write_exp_elt_opcode (pstate, OP_FLOAT);
2224 case STRUCTOP_STRUCT:
2226 convert_ast_to_expression (operation->left.op, top);
2228 if (operation->completing)
2229 pstate->mark_struct_expression ();
2230 write_exp_elt_opcode (pstate, STRUCTOP_STRUCT);
2231 write_exp_string (pstate, operation->right.sval);
2232 write_exp_elt_opcode (pstate, STRUCTOP_STRUCT);
2236 case STRUCTOP_ANONYMOUS:
2238 convert_ast_to_expression (operation->left.op, top);
2240 write_exp_elt_opcode (pstate, STRUCTOP_ANONYMOUS);
2241 write_exp_elt_longcst (pstate, operation->right.typed_val_int.val);
2242 write_exp_elt_opcode (pstate, STRUCTOP_ANONYMOUS);
2247 convert_ast_to_expression (operation->left.op, top, true);
2248 write_exp_elt_opcode (pstate, UNOP_SIZEOF);
2253 case UNOP_COMPLEMENT:
2256 convert_ast_to_expression (operation->left.op, top);
2257 write_exp_elt_opcode (pstate, operation->opcode);
2260 case BINOP_SUBSCRIPT:
2267 case BINOP_BITWISE_AND:
2268 case BINOP_BITWISE_IOR:
2269 case BINOP_BITWISE_XOR:
2272 case BINOP_LOGICAL_OR:
2273 case BINOP_LOGICAL_AND:
2275 case BINOP_NOTEQUAL:
2282 convert_ast_to_expression (operation->left.op, top);
2283 convert_ast_to_expression (operation->right.op, top);
2284 if (operation->compound_assignment)
2286 write_exp_elt_opcode (pstate, BINOP_ASSIGN_MODIFY);
2287 write_exp_elt_opcode (pstate, operation->opcode);
2288 write_exp_elt_opcode (pstate, BINOP_ASSIGN_MODIFY);
2291 write_exp_elt_opcode (pstate, operation->opcode);
2293 if (operation->compound_assignment
2294 || operation->opcode == BINOP_ASSIGN)
2298 type = language_lookup_primitive_type (pstate->language (),
2302 write_exp_elt_opcode (pstate, OP_LONG);
2303 write_exp_elt_type (pstate, type);
2304 write_exp_elt_longcst (pstate, 0);
2305 write_exp_elt_opcode (pstate, OP_LONG);
2307 write_exp_elt_opcode (pstate, BINOP_COMMA);
2313 struct type *type = convert_ast_to_type (operation->right.op);
2315 convert_ast_to_expression (operation->left.op, top);
2316 write_exp_elt_opcode (pstate, UNOP_CAST);
2317 write_exp_elt_type (pstate, type);
2318 write_exp_elt_opcode (pstate, UNOP_CAST);
2324 if (operation->left.op->opcode == OP_VAR_VALUE)
2327 const char *varname = convert_name (operation->left.op);
2329 type = rust_lookup_type (varname,
2330 pstate->expression_context_block);
2333 /* This is actually a tuple struct expression, not a
2335 rust_op_vector *params = operation->right.params;
2337 if (TYPE_CODE (type) != TYPE_CODE_NAMESPACE)
2339 if (!rust_tuple_struct_type_p (type))
2340 error (_("Type %s is not a tuple struct"), varname);
2342 for (int i = 0; i < params->size (); ++i)
2344 char *cell = get_print_cell ();
2346 xsnprintf (cell, PRINT_CELL_SIZE, "__%d", i);
2347 write_exp_elt_opcode (pstate, OP_NAME);
2348 write_exp_string (pstate, make_stoken (cell));
2349 write_exp_elt_opcode (pstate, OP_NAME);
2351 convert_ast_to_expression ((*params)[i], top);
2354 write_exp_elt_opcode (pstate, OP_AGGREGATE);
2355 write_exp_elt_type (pstate, type);
2356 write_exp_elt_longcst (pstate, 2 * params->size ());
2357 write_exp_elt_opcode (pstate, OP_AGGREGATE);
2362 convert_ast_to_expression (operation->left.op, top);
2363 convert_params_to_expression (operation->right.params, top);
2364 write_exp_elt_opcode (pstate, OP_FUNCALL);
2365 write_exp_elt_longcst (pstate, operation->right.params->size ());
2366 write_exp_elt_longcst (pstate, OP_FUNCALL);
2371 gdb_assert (operation->left.op == NULL);
2372 convert_params_to_expression (operation->right.params, top);
2373 write_exp_elt_opcode (pstate, OP_ARRAY);
2374 write_exp_elt_longcst (pstate, 0);
2375 write_exp_elt_longcst (pstate, operation->right.params->size () - 1);
2376 write_exp_elt_longcst (pstate, OP_ARRAY);
2381 struct block_symbol sym;
2382 const char *varname;
2384 if (operation->left.sval.ptr[0] == '$')
2386 write_dollar_variable (pstate, operation->left.sval);
2390 varname = convert_name (operation);
2391 sym = lookup_symbol (varname, pstate->expression_context_block,
2393 if (sym.symbol != NULL && SYMBOL_CLASS (sym.symbol) != LOC_TYPEDEF)
2395 write_exp_elt_opcode (pstate, OP_VAR_VALUE);
2396 write_exp_elt_block (pstate, sym.block);
2397 write_exp_elt_sym (pstate, sym.symbol);
2398 write_exp_elt_opcode (pstate, OP_VAR_VALUE);
2402 struct type *type = NULL;
2404 if (sym.symbol != NULL)
2406 gdb_assert (SYMBOL_CLASS (sym.symbol) == LOC_TYPEDEF);
2407 type = SYMBOL_TYPE (sym.symbol);
2410 type = rust_lookup_type (varname,
2411 pstate->expression_context_block);
2413 error (_("No symbol '%s' in current context"), varname);
2416 && TYPE_CODE (type) == TYPE_CODE_STRUCT
2417 && TYPE_NFIELDS (type) == 0)
2419 /* A unit-like struct. */
2420 write_exp_elt_opcode (pstate, OP_AGGREGATE);
2421 write_exp_elt_type (pstate, type);
2422 write_exp_elt_longcst (pstate, 0);
2423 write_exp_elt_opcode (pstate, OP_AGGREGATE);
2425 else if (want_type || operation == top)
2427 write_exp_elt_opcode (pstate, OP_TYPE);
2428 write_exp_elt_type (pstate, type);
2429 write_exp_elt_opcode (pstate, OP_TYPE);
2432 error (_("Found type '%s', which can't be "
2433 "evaluated in this context"),
2442 rust_set_vector *fields = operation->right.field_inits;
2447 for (const set_field &init : *fields)
2449 if (init.name.ptr != NULL)
2451 write_exp_elt_opcode (pstate, OP_NAME);
2452 write_exp_string (pstate, init.name);
2453 write_exp_elt_opcode (pstate, OP_NAME);
2457 convert_ast_to_expression (init.init, top);
2460 if (init.name.ptr == NULL)
2462 /* This is handled differently from Ada in our
2464 write_exp_elt_opcode (pstate, OP_OTHERS);
2468 name = convert_name (operation->left.op);
2469 type = rust_lookup_type (name, pstate->expression_context_block);
2471 error (_("Could not find type '%s'"), operation->left.sval.ptr);
2473 if (TYPE_CODE (type) != TYPE_CODE_STRUCT
2474 || rust_tuple_type_p (type)
2475 || rust_tuple_struct_type_p (type))
2476 error (_("Struct expression applied to non-struct type"));
2478 write_exp_elt_opcode (pstate, OP_AGGREGATE);
2479 write_exp_elt_type (pstate, type);
2480 write_exp_elt_longcst (pstate, length);
2481 write_exp_elt_opcode (pstate, OP_AGGREGATE);
2487 write_exp_elt_opcode (pstate, OP_STRING);
2488 write_exp_string (pstate, operation->left.sval);
2489 write_exp_elt_opcode (pstate, OP_STRING);
2495 enum range_type kind = BOTH_BOUND_DEFAULT;
2497 if (operation->left.op != NULL)
2499 convert_ast_to_expression (operation->left.op, top);
2500 kind = HIGH_BOUND_DEFAULT;
2502 if (operation->right.op != NULL)
2504 convert_ast_to_expression (operation->right.op, top);
2505 if (kind == BOTH_BOUND_DEFAULT)
2506 kind = (operation->inclusive
2507 ? LOW_BOUND_DEFAULT : LOW_BOUND_DEFAULT_EXCLUSIVE);
2510 gdb_assert (kind == HIGH_BOUND_DEFAULT);
2511 kind = (operation->inclusive
2512 ? NONE_BOUND_DEFAULT : NONE_BOUND_DEFAULT_EXCLUSIVE);
2517 /* Nothing should make an inclusive range without an upper
2519 gdb_assert (!operation->inclusive);
2522 write_exp_elt_opcode (pstate, OP_RANGE);
2523 write_exp_elt_longcst (pstate, kind);
2524 write_exp_elt_opcode (pstate, OP_RANGE);
2529 gdb_assert_not_reached ("unhandled opcode in convert_ast_to_expression");
2535 /* The parser as exposed to gdb. */
2538 rust_parse (struct parser_state *state)
2542 /* This sets various globals and also clears them on
2544 rust_parser parser (state);
2546 result = rustyyparse (&parser);
2548 if (!result || (state->parse_completion && parser.rust_ast != NULL))
2549 parser.convert_ast_to_expression (parser.rust_ast, parser.rust_ast);
2554 /* The parser error handler. */
2557 rustyyerror (rust_parser *parser, const char *msg)
2559 const char *where = (parser->pstate->prev_lexptr
2560 ? parser->pstate->prev_lexptr
2561 : parser->pstate->lexptr);
2562 error (_("%s in expression, near `%s'."), msg, where);
2569 /* Initialize the lexer for testing. */
2572 rust_lex_test_init (rust_parser *parser, const char *input)
2574 parser->pstate->prev_lexptr = NULL;
2575 parser->pstate->lexptr = input;
2576 parser->paren_depth = 0;
2579 /* A test helper that lexes a string, expecting a single token. It
2580 returns the lexer data for this token. */
2583 rust_lex_test_one (rust_parser *parser, const char *input, int expected)
2588 rust_lex_test_init (parser, input);
2590 token = rustyylex (&result, parser);
2591 SELF_CHECK (token == expected);
2596 token = rustyylex (&ignore, parser);
2597 SELF_CHECK (token == 0);
2603 /* Test that INPUT lexes as the integer VALUE. */
2606 rust_lex_int_test (rust_parser *parser, const char *input,
2607 LONGEST value, int kind)
2609 RUSTSTYPE result = rust_lex_test_one (parser, input, kind);
2610 SELF_CHECK (result.typed_val_int.val == value);
2613 /* Test that INPUT throws an exception with text ERR. */
2616 rust_lex_exception_test (rust_parser *parser, const char *input,
2621 /* The "kind" doesn't matter. */
2622 rust_lex_test_one (parser, input, DECIMAL_INTEGER);
2625 catch (const gdb_exception_error &except)
2627 SELF_CHECK (strcmp (except.what (), err) == 0);
2631 /* Test that INPUT lexes as the identifier, string, or byte-string
2632 VALUE. KIND holds the expected token kind. */
2635 rust_lex_stringish_test (rust_parser *parser, const char *input,
2636 const char *value, int kind)
2638 RUSTSTYPE result = rust_lex_test_one (parser, input, kind);
2639 SELF_CHECK (result.sval.length == strlen (value));
2640 SELF_CHECK (strncmp (result.sval.ptr, value, result.sval.length) == 0);
2643 /* Helper to test that a string parses as a given token sequence. */
2646 rust_lex_test_sequence (rust_parser *parser, const char *input, int len,
2647 const int expected[])
2651 parser->pstate->lexptr = input;
2652 parser->paren_depth = 0;
2654 for (i = 0; i < len; ++i)
2657 int token = rustyylex (&ignore, parser);
2659 SELF_CHECK (token == expected[i]);
2663 /* Tests for an integer-parsing corner case. */
2666 rust_lex_test_trailing_dot (rust_parser *parser)
2668 const int expected1[] = { DECIMAL_INTEGER, '.', IDENT, '(', ')', 0 };
2669 const int expected2[] = { INTEGER, '.', IDENT, '(', ')', 0 };
2670 const int expected3[] = { FLOAT, EQEQ, '(', ')', 0 };
2671 const int expected4[] = { DECIMAL_INTEGER, DOTDOT, DECIMAL_INTEGER, 0 };
2673 rust_lex_test_sequence (parser, "23.g()", ARRAY_SIZE (expected1), expected1);
2674 rust_lex_test_sequence (parser, "23_0.g()", ARRAY_SIZE (expected2),
2676 rust_lex_test_sequence (parser, "23.==()", ARRAY_SIZE (expected3),
2678 rust_lex_test_sequence (parser, "23..25", ARRAY_SIZE (expected4), expected4);
2681 /* Tests of completion. */
2684 rust_lex_test_completion (rust_parser *parser)
2686 const int expected[] = { IDENT, '.', COMPLETE, 0 };
2688 parser->pstate->parse_completion = 1;
2690 rust_lex_test_sequence (parser, "something.wha", ARRAY_SIZE (expected),
2692 rust_lex_test_sequence (parser, "something.", ARRAY_SIZE (expected),
2695 parser->pstate->parse_completion = 0;
2698 /* Test pushback. */
2701 rust_lex_test_push_back (rust_parser *parser)
2706 rust_lex_test_init (parser, ">>=");
2708 token = rustyylex (&lval, parser);
2709 SELF_CHECK (token == COMPOUND_ASSIGN);
2710 SELF_CHECK (lval.opcode == BINOP_RSH);
2712 parser->push_back ('=');
2714 token = rustyylex (&lval, parser);
2715 SELF_CHECK (token == '=');
2717 token = rustyylex (&lval, parser);
2718 SELF_CHECK (token == 0);
2721 /* Unit test the lexer. */
2724 rust_lex_tests (void)
2728 // Set up dummy "parser", so that rust_type works.
2729 struct parser_state ps (&rust_language_defn, target_gdbarch (),
2730 nullptr, 0, 0, nullptr, 0, nullptr);
2731 rust_parser parser (&ps);
2733 rust_lex_test_one (&parser, "", 0);
2734 rust_lex_test_one (&parser, " \t \n \r ", 0);
2735 rust_lex_test_one (&parser, "thread 23", 0);
2736 rust_lex_test_one (&parser, "task 23", 0);
2737 rust_lex_test_one (&parser, "th 104", 0);
2738 rust_lex_test_one (&parser, "ta 97", 0);
2740 rust_lex_int_test (&parser, "'z'", 'z', INTEGER);
2741 rust_lex_int_test (&parser, "'\\xff'", 0xff, INTEGER);
2742 rust_lex_int_test (&parser, "'\\u{1016f}'", 0x1016f, INTEGER);
2743 rust_lex_int_test (&parser, "b'z'", 'z', INTEGER);
2744 rust_lex_int_test (&parser, "b'\\xfe'", 0xfe, INTEGER);
2745 rust_lex_int_test (&parser, "b'\\xFE'", 0xfe, INTEGER);
2746 rust_lex_int_test (&parser, "b'\\xfE'", 0xfe, INTEGER);
2748 /* Test all escapes in both modes. */
2749 rust_lex_int_test (&parser, "'\\n'", '\n', INTEGER);
2750 rust_lex_int_test (&parser, "'\\r'", '\r', INTEGER);
2751 rust_lex_int_test (&parser, "'\\t'", '\t', INTEGER);
2752 rust_lex_int_test (&parser, "'\\\\'", '\\', INTEGER);
2753 rust_lex_int_test (&parser, "'\\0'", '\0', INTEGER);
2754 rust_lex_int_test (&parser, "'\\''", '\'', INTEGER);
2755 rust_lex_int_test (&parser, "'\\\"'", '"', INTEGER);
2757 rust_lex_int_test (&parser, "b'\\n'", '\n', INTEGER);
2758 rust_lex_int_test (&parser, "b'\\r'", '\r', INTEGER);
2759 rust_lex_int_test (&parser, "b'\\t'", '\t', INTEGER);
2760 rust_lex_int_test (&parser, "b'\\\\'", '\\', INTEGER);
2761 rust_lex_int_test (&parser, "b'\\0'", '\0', INTEGER);
2762 rust_lex_int_test (&parser, "b'\\''", '\'', INTEGER);
2763 rust_lex_int_test (&parser, "b'\\\"'", '"', INTEGER);
2765 rust_lex_exception_test (&parser, "'z", "Unterminated character literal");
2766 rust_lex_exception_test (&parser, "b'\\x0'", "Not enough hex digits seen");
2767 rust_lex_exception_test (&parser, "b'\\u{0}'",
2768 "Unicode escape in byte literal");
2769 rust_lex_exception_test (&parser, "'\\x0'", "Not enough hex digits seen");
2770 rust_lex_exception_test (&parser, "'\\u0'", "Missing '{' in Unicode escape");
2771 rust_lex_exception_test (&parser, "'\\u{0", "Missing '}' in Unicode escape");
2772 rust_lex_exception_test (&parser, "'\\u{0000007}", "Overlong hex escape");
2773 rust_lex_exception_test (&parser, "'\\u{}", "Not enough hex digits seen");
2774 rust_lex_exception_test (&parser, "'\\Q'", "Invalid escape \\Q in literal");
2775 rust_lex_exception_test (&parser, "b'\\Q'", "Invalid escape \\Q in literal");
2777 rust_lex_int_test (&parser, "23", 23, DECIMAL_INTEGER);
2778 rust_lex_int_test (&parser, "2_344__29", 234429, INTEGER);
2779 rust_lex_int_test (&parser, "0x1f", 0x1f, INTEGER);
2780 rust_lex_int_test (&parser, "23usize", 23, INTEGER);
2781 rust_lex_int_test (&parser, "23i32", 23, INTEGER);
2782 rust_lex_int_test (&parser, "0x1_f", 0x1f, INTEGER);
2783 rust_lex_int_test (&parser, "0b1_101011__", 0x6b, INTEGER);
2784 rust_lex_int_test (&parser, "0o001177i64", 639, INTEGER);
2785 rust_lex_int_test (&parser, "0x123456789u64", 0x123456789ull, INTEGER);
2787 rust_lex_test_trailing_dot (&parser);
2789 rust_lex_test_one (&parser, "23.", FLOAT);
2790 rust_lex_test_one (&parser, "23.99f32", FLOAT);
2791 rust_lex_test_one (&parser, "23e7", FLOAT);
2792 rust_lex_test_one (&parser, "23E-7", FLOAT);
2793 rust_lex_test_one (&parser, "23e+7", FLOAT);
2794 rust_lex_test_one (&parser, "23.99e+7f64", FLOAT);
2795 rust_lex_test_one (&parser, "23.82f32", FLOAT);
2797 rust_lex_stringish_test (&parser, "hibob", "hibob", IDENT);
2798 rust_lex_stringish_test (&parser, "hibob__93", "hibob__93", IDENT);
2799 rust_lex_stringish_test (&parser, "thread", "thread", IDENT);
2801 rust_lex_stringish_test (&parser, "\"string\"", "string", STRING);
2802 rust_lex_stringish_test (&parser, "\"str\\ting\"", "str\ting", STRING);
2803 rust_lex_stringish_test (&parser, "\"str\\\"ing\"", "str\"ing", STRING);
2804 rust_lex_stringish_test (&parser, "r\"str\\ing\"", "str\\ing", STRING);
2805 rust_lex_stringish_test (&parser, "r#\"str\\ting\"#", "str\\ting", STRING);
2806 rust_lex_stringish_test (&parser, "r###\"str\\\"ing\"###", "str\\\"ing",
2809 rust_lex_stringish_test (&parser, "b\"string\"", "string", BYTESTRING);
2810 rust_lex_stringish_test (&parser, "b\"\x73tring\"", "string", BYTESTRING);
2811 rust_lex_stringish_test (&parser, "b\"str\\\"ing\"", "str\"ing", BYTESTRING);
2812 rust_lex_stringish_test (&parser, "br####\"\\x73tring\"####", "\\x73tring",
2815 for (i = 0; i < ARRAY_SIZE (identifier_tokens); ++i)
2816 rust_lex_test_one (&parser, identifier_tokens[i].name,
2817 identifier_tokens[i].value);
2819 for (i = 0; i < ARRAY_SIZE (operator_tokens); ++i)
2820 rust_lex_test_one (&parser, operator_tokens[i].name,
2821 operator_tokens[i].value);
2823 rust_lex_test_completion (&parser);
2824 rust_lex_test_push_back (&parser);
2827 #endif /* GDB_SELF_TEST */
2830 _initialize_rust_exp (void)
2832 int code = regcomp (&number_regex, number_regex_text, REG_EXTENDED);
2833 /* If the regular expression was incorrect, it was a programming
2835 gdb_assert (code == 0);
2838 selftests::register_test ("rust-lex", rust_lex_tests);