2785 lines
68 KiB
Plaintext
2785 lines
68 KiB
Plaintext
/* Bison parser for Rust expressions, for GDB.
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Copyright (C) 2016-2017 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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/* Removing the last conflict seems difficult. */
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%expect 1
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%{
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#include "defs.h"
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#include "block.h"
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#include "charset.h"
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#include "cp-support.h"
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#include "gdb_obstack.h"
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#include "gdb_regex.h"
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#include "rust-lang.h"
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#include "parser-defs.h"
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#include "selftest.h"
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#include "value.h"
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#include "vec.h"
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#define GDB_YY_REMAP_PREFIX rust
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#include "yy-remap.h"
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#define RUSTSTYPE YYSTYPE
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struct rust_op;
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typedef std::vector<const struct rust_op *> rust_op_vector;
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/* A typed integer constant. */
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struct typed_val_int
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{
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LONGEST val;
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struct type *type;
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};
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/* A typed floating point constant. */
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struct typed_val_float
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{
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DOUBLEST dval;
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struct type *type;
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};
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/* An identifier and an expression. This is used to represent one
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element of a struct initializer. */
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struct set_field
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{
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struct stoken name;
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const struct rust_op *init;
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};
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typedef std::vector<set_field> rust_set_vector;
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static int rustyylex (void);
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static void rust_push_back (char c);
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static const char *rust_copy_name (const char *, int);
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static struct stoken rust_concat3 (const char *, const char *, const char *);
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static struct stoken make_stoken (const char *);
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static struct block_symbol rust_lookup_symbol (const char *name,
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const struct block *block,
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const domain_enum domain);
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static struct type *rust_lookup_type (const char *name,
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const struct block *block);
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static struct type *rust_type (const char *name);
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static const struct rust_op *crate_name (const struct rust_op *name);
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static const struct rust_op *super_name (const struct rust_op *name,
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unsigned int n_supers);
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static const struct rust_op *ast_operation (enum exp_opcode opcode,
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const struct rust_op *left,
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const struct rust_op *right);
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static const struct rust_op *ast_compound_assignment
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(enum exp_opcode opcode, const struct rust_op *left,
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const struct rust_op *rust_op);
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static const struct rust_op *ast_literal (struct typed_val_int val);
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static const struct rust_op *ast_dliteral (struct typed_val_float val);
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static const struct rust_op *ast_structop (const struct rust_op *left,
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const char *name,
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int completing);
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static const struct rust_op *ast_structop_anonymous
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(const struct rust_op *left, struct typed_val_int number);
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static const struct rust_op *ast_unary (enum exp_opcode opcode,
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const struct rust_op *expr);
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static const struct rust_op *ast_cast (const struct rust_op *expr,
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const struct rust_op *type);
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static const struct rust_op *ast_call_ish (enum exp_opcode opcode,
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const struct rust_op *expr,
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rust_op_vector *params);
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static const struct rust_op *ast_path (struct stoken name,
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rust_op_vector *params);
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static const struct rust_op *ast_string (struct stoken str);
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static const struct rust_op *ast_struct (const struct rust_op *name,
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rust_set_vector *fields);
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static const struct rust_op *ast_range (const struct rust_op *lhs,
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const struct rust_op *rhs);
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static const struct rust_op *ast_array_type (const struct rust_op *lhs,
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struct typed_val_int val);
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static const struct rust_op *ast_slice_type (const struct rust_op *type);
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static const struct rust_op *ast_reference_type (const struct rust_op *type);
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static const struct rust_op *ast_pointer_type (const struct rust_op *type,
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int is_mut);
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static const struct rust_op *ast_function_type (const struct rust_op *result,
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rust_op_vector *params);
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static const struct rust_op *ast_tuple_type (rust_op_vector *params);
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/* The current rust parser. */
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struct rust_parser;
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static rust_parser *current_parser;
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/* A regular expression for matching Rust numbers. This is split up
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since it is very long and this gives us a way to comment the
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sections. */
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static const char *number_regex_text =
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/* subexpression 1: allows use of alternation, otherwise uninteresting */
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"^("
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/* First comes floating point. */
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/* Recognize number after the decimal point, with optional
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exponent and optional type suffix.
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subexpression 2: allows "?", otherwise uninteresting
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subexpression 3: if present, type suffix
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*/
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"[0-9][0-9_]*\\.[0-9][0-9_]*([eE][-+]?[0-9][0-9_]*)?(f32|f64)?"
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#define FLOAT_TYPE1 3
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"|"
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/* Recognize exponent without decimal point, with optional type
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suffix.
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subexpression 4: if present, type suffix
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*/
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#define FLOAT_TYPE2 4
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"[0-9][0-9_]*[eE][-+]?[0-9][0-9_]*(f32|f64)?"
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"|"
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/* "23." is a valid floating point number, but "23.e5" and
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"23.f32" are not. So, handle the trailing-. case
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separately. */
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"[0-9][0-9_]*\\."
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"|"
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/* Finally come integers.
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subexpression 5: text of integer
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subexpression 6: if present, type suffix
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subexpression 7: allows use of alternation, otherwise uninteresting
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*/
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#define INT_TEXT 5
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#define INT_TYPE 6
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"(0x[a-fA-F0-9_]+|0o[0-7_]+|0b[01_]+|[0-9][0-9_]*)"
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"([iu](size|8|16|32|64))?"
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")";
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/* The number of subexpressions to allocate space for, including the
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"0th" whole match subexpression. */
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#define NUM_SUBEXPRESSIONS 8
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/* The compiled number-matching regex. */
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static regex_t number_regex;
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/* True if we're running unit tests. */
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static int unit_testing;
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/* Obstack for data temporarily allocated during parsing. Points to
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the obstack in the rust_parser, or to a temporary obstack during
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unit testing. */
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static auto_obstack *work_obstack;
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/* An instance of this is created before parsing, and destroyed when
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parsing is finished. */
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struct rust_parser
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{
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rust_parser (struct parser_state *state)
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: rust_ast (nullptr),
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pstate (state)
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{
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gdb_assert (current_parser == nullptr);
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current_parser = this;
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work_obstack = &obstack;
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}
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~rust_parser ()
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{
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/* Clean up the globals we set. */
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current_parser = nullptr;
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work_obstack = nullptr;
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}
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/* Create a new rust_set_vector. The storage for the new vector is
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managed by this class. */
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rust_set_vector *new_set_vector ()
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{
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rust_set_vector *result = new rust_set_vector;
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set_vectors.push_back (std::unique_ptr<rust_set_vector> (result));
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return result;
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}
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/* Create a new rust_ops_vector. The storage for the new vector is
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managed by this class. */
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rust_op_vector *new_op_vector ()
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{
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rust_op_vector *result = new rust_op_vector;
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op_vectors.push_back (std::unique_ptr<rust_op_vector> (result));
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return result;
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}
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/* Return the parser's language. */
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const struct language_defn *language () const
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{
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return parse_language (pstate);
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}
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/* Return the parser's gdbarch. */
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struct gdbarch *arch () const
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{
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return parse_gdbarch (pstate);
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}
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/* A pointer to this is installed globally. */
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auto_obstack obstack;
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/* Result of parsing. Points into obstack. */
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const struct rust_op *rust_ast;
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/* This keeps track of the various vectors we allocate. */
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std::vector<std::unique_ptr<rust_set_vector>> set_vectors;
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std::vector<std::unique_ptr<rust_op_vector>> op_vectors;
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/* The parser state gdb gave us. */
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struct parser_state *pstate;
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};
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%}
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%union
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{
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/* A typed integer constant. */
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struct typed_val_int typed_val_int;
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/* A typed floating point constant. */
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struct typed_val_float typed_val_float;
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/* An identifier or string. */
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struct stoken sval;
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/* A token representing an opcode, like "==". */
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enum exp_opcode opcode;
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/* A list of expressions; for example, the arguments to a function
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call. */
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rust_op_vector *params;
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/* A list of field initializers. */
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rust_set_vector *field_inits;
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/* A single field initializer. */
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struct set_field one_field_init;
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/* An expression. */
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const struct rust_op *op;
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/* A plain integer, for example used to count the number of
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"super::" prefixes on a path. */
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unsigned int depth;
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}
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%{
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/* Rust AST operations. We build a tree of these; then lower them
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to gdb expressions when parsing has completed. */
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struct rust_op
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{
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/* The opcode. */
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enum exp_opcode opcode;
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/* If OPCODE is OP_TYPE, then this holds information about what type
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is described by this node. */
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enum type_code typecode;
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/* Indicates whether OPCODE actually represents a compound
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assignment. For example, if OPCODE is GTGT and this is false,
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then this rust_op represents an ordinary ">>"; but if this is
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true, then this rust_op represents ">>=". Unused in other
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cases. */
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unsigned int compound_assignment : 1;
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/* Only used by a field expression; if set, indicates that the field
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name occurred at the end of the expression and is eligible for
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completion. */
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unsigned int completing : 1;
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/* Operands of expression. Which one is used and how depends on the
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particular opcode. */
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RUSTSTYPE left;
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RUSTSTYPE right;
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};
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%}
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%token <sval> GDBVAR
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%token <sval> IDENT
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%token <sval> COMPLETE
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%token <typed_val_int> INTEGER
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%token <typed_val_int> DECIMAL_INTEGER
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%token <sval> STRING
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%token <sval> BYTESTRING
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%token <typed_val_float> FLOAT
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%token <opcode> COMPOUND_ASSIGN
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/* Keyword tokens. */
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%token <voidval> KW_AS
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%token <voidval> KW_IF
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%token <voidval> KW_TRUE
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%token <voidval> KW_FALSE
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%token <voidval> KW_SUPER
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%token <voidval> KW_SELF
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%token <voidval> KW_MUT
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%token <voidval> KW_EXTERN
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%token <voidval> KW_CONST
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%token <voidval> KW_FN
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%token <voidval> KW_SIZEOF
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/* Operator tokens. */
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%token <voidval> DOTDOT
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%token <voidval> OROR
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%token <voidval> ANDAND
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%token <voidval> EQEQ
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%token <voidval> NOTEQ
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%token <voidval> LTEQ
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%token <voidval> GTEQ
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%token <voidval> LSH RSH
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%token <voidval> COLONCOLON
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%token <voidval> ARROW
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%type <op> type
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%type <op> path_for_expr
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%type <op> identifier_path_for_expr
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%type <op> path_for_type
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%type <op> identifier_path_for_type
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%type <op> just_identifiers_for_type
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%type <params> maybe_type_list
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%type <params> type_list
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%type <depth> super_path
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%type <op> literal
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%type <op> expr
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%type <op> field_expr
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%type <op> idx_expr
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%type <op> unop_expr
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%type <op> binop_expr
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%type <op> binop_expr_expr
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%type <op> type_cast_expr
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%type <op> assignment_expr
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%type <op> compound_assignment_expr
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%type <op> paren_expr
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%type <op> call_expr
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%type <op> path_expr
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%type <op> tuple_expr
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%type <op> unit_expr
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%type <op> struct_expr
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%type <op> array_expr
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%type <op> range_expr
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%type <params> expr_list
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%type <params> maybe_expr_list
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%type <params> paren_expr_list
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%type <field_inits> struct_expr_list
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%type <one_field_init> struct_expr_tail
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/* Precedence. */
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%nonassoc DOTDOT
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%right '=' COMPOUND_ASSIGN
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%left OROR
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%left ANDAND
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%nonassoc EQEQ NOTEQ '<' '>' LTEQ GTEQ
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%left '|'
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%left '^'
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%left '&'
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%left LSH RSH
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%left '@'
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%left '+' '-'
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%left '*' '/' '%'
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/* These could be %precedence in Bison, but that isn't a yacc
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feature. */
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%left KW_AS
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%left UNARY
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%left '[' '.' '('
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%%
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start:
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expr
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{
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/* If we are completing and see a valid parse,
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rust_ast will already have been set. */
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if (current_parser->rust_ast == NULL)
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current_parser->rust_ast = $1;
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}
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;
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/* Note that the Rust grammar includes a method_call_expr, but we
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handle this differently, to avoid a shift/reduce conflict with
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call_expr. */
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expr:
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literal
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| path_expr
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| tuple_expr
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| unit_expr
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| struct_expr
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| field_expr
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| array_expr
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| idx_expr
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| range_expr
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| unop_expr /* Must precede call_expr because of ambiguity with sizeof. */
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| binop_expr
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| paren_expr
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| call_expr
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;
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tuple_expr:
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'(' expr ',' maybe_expr_list ')'
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{
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$4->push_back ($2);
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error (_("Tuple expressions not supported yet"));
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}
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;
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unit_expr:
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'(' ')'
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{
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struct typed_val_int val;
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val.type
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= language_lookup_primitive_type (current_parser->language (),
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current_parser->arch (),
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"()");
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val.val = 0;
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$$ = ast_literal (val);
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}
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;
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/* To avoid a shift/reduce conflict with call_expr, we don't handle
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tuple struct expressions here, but instead when examining the
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AST. */
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struct_expr:
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path_for_expr '{' struct_expr_list '}'
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{ $$ = ast_struct ($1, $3); }
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;
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struct_expr_tail:
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DOTDOT expr
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{
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struct set_field sf;
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sf.name.ptr = NULL;
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sf.name.length = 0;
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sf.init = $2;
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$$ = sf;
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}
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| IDENT ':' expr
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{
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struct set_field sf;
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sf.name = $1;
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sf.init = $3;
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$$ = sf;
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}
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;
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struct_expr_list:
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/* %empty */
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{
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$$ = current_parser->new_set_vector ();
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}
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| struct_expr_tail
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{
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rust_set_vector *result = current_parser->new_set_vector ();
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result->push_back ($1);
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$$ = result;
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}
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| IDENT ':' expr ',' struct_expr_list
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{
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struct set_field sf;
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sf.name = $1;
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sf.init = $3;
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$5->push_back (sf);
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$$ = $5;
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}
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;
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array_expr:
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'[' KW_MUT expr_list ']'
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{ $$ = ast_call_ish (OP_ARRAY, NULL, $3); }
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| '[' expr_list ']'
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{ $$ = ast_call_ish (OP_ARRAY, NULL, $2); }
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| '[' KW_MUT expr ';' expr ']'
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{ $$ = ast_operation (OP_RUST_ARRAY, $3, $5); }
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| '[' expr ';' expr ']'
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{ $$ = ast_operation (OP_RUST_ARRAY, $2, $4); }
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;
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range_expr:
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expr DOTDOT
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||
{ $$ = ast_range ($1, NULL); }
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||
| expr DOTDOT expr
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||
{ $$ = ast_range ($1, $3); }
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||
| DOTDOT expr
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{ $$ = ast_range (NULL, $2); }
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||
| DOTDOT
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||
{ $$ = ast_range (NULL, NULL); }
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||
;
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literal:
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INTEGER
|
||
{ $$ = ast_literal ($1); }
|
||
| DECIMAL_INTEGER
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||
{ $$ = ast_literal ($1); }
|
||
| FLOAT
|
||
{ $$ = ast_dliteral ($1); }
|
||
| STRING
|
||
{
|
||
const struct rust_op *str = ast_string ($1);
|
||
struct set_field field;
|
||
struct typed_val_int val;
|
||
struct stoken token;
|
||
|
||
rust_set_vector *fields = current_parser->new_set_vector ();
|
||
|
||
/* Wrap the raw string in the &str struct. */
|
||
field.name.ptr = "data_ptr";
|
||
field.name.length = strlen (field.name.ptr);
|
||
field.init = ast_unary (UNOP_ADDR, ast_string ($1));
|
||
fields->push_back (field);
|
||
|
||
val.type = rust_type ("usize");
|
||
val.val = $1.length;
|
||
|
||
field.name.ptr = "length";
|
||
field.name.length = strlen (field.name.ptr);
|
||
field.init = ast_literal (val);
|
||
fields->push_back (field);
|
||
|
||
token.ptr = "&str";
|
||
token.length = strlen (token.ptr);
|
||
$$ = ast_struct (ast_path (token, NULL), fields);
|
||
}
|
||
| BYTESTRING
|
||
{ $$ = ast_string ($1); }
|
||
| KW_TRUE
|
||
{
|
||
struct typed_val_int val;
|
||
|
||
val.type = language_bool_type (current_parser->language (),
|
||
current_parser->arch ());
|
||
val.val = 1;
|
||
$$ = ast_literal (val);
|
||
}
|
||
| KW_FALSE
|
||
{
|
||
struct typed_val_int val;
|
||
|
||
val.type = language_bool_type (current_parser->language (),
|
||
current_parser->arch ());
|
||
val.val = 0;
|
||
$$ = ast_literal (val);
|
||
}
|
||
;
|
||
|
||
field_expr:
|
||
expr '.' IDENT
|
||
{ $$ = ast_structop ($1, $3.ptr, 0); }
|
||
| expr '.' COMPLETE
|
||
{
|
||
$$ = ast_structop ($1, $3.ptr, 1);
|
||
current_parser->rust_ast = $$;
|
||
}
|
||
| expr '.' DECIMAL_INTEGER
|
||
{ $$ = ast_structop_anonymous ($1, $3); }
|
||
;
|
||
|
||
idx_expr:
|
||
expr '[' expr ']'
|
||
{ $$ = ast_operation (BINOP_SUBSCRIPT, $1, $3); }
|
||
;
|
||
|
||
unop_expr:
|
||
'+' expr %prec UNARY
|
||
{ $$ = ast_unary (UNOP_PLUS, $2); }
|
||
|
||
| '-' expr %prec UNARY
|
||
{ $$ = ast_unary (UNOP_NEG, $2); }
|
||
|
||
| '!' expr %prec UNARY
|
||
{
|
||
/* Note that we provide a Rust-specific evaluator
|
||
override for UNOP_COMPLEMENT, so it can do the
|
||
right thing for both bool and integral
|
||
values. */
|
||
$$ = ast_unary (UNOP_COMPLEMENT, $2);
|
||
}
|
||
|
||
| '*' expr %prec UNARY
|
||
{ $$ = ast_unary (UNOP_IND, $2); }
|
||
|
||
| '&' expr %prec UNARY
|
||
{ $$ = ast_unary (UNOP_ADDR, $2); }
|
||
|
||
| '&' KW_MUT expr %prec UNARY
|
||
{ $$ = ast_unary (UNOP_ADDR, $3); }
|
||
| KW_SIZEOF '(' expr ')' %prec UNARY
|
||
{ $$ = ast_unary (UNOP_SIZEOF, $3); }
|
||
;
|
||
|
||
binop_expr:
|
||
binop_expr_expr
|
||
| type_cast_expr
|
||
| assignment_expr
|
||
| compound_assignment_expr
|
||
;
|
||
|
||
binop_expr_expr:
|
||
expr '*' expr
|
||
{ $$ = ast_operation (BINOP_MUL, $1, $3); }
|
||
|
||
| expr '@' expr
|
||
{ $$ = ast_operation (BINOP_REPEAT, $1, $3); }
|
||
|
||
| expr '/' expr
|
||
{ $$ = ast_operation (BINOP_DIV, $1, $3); }
|
||
|
||
| expr '%' expr
|
||
{ $$ = ast_operation (BINOP_REM, $1, $3); }
|
||
|
||
| expr '<' expr
|
||
{ $$ = ast_operation (BINOP_LESS, $1, $3); }
|
||
|
||
| expr '>' expr
|
||
{ $$ = ast_operation (BINOP_GTR, $1, $3); }
|
||
|
||
| expr '&' expr
|
||
{ $$ = ast_operation (BINOP_BITWISE_AND, $1, $3); }
|
||
|
||
| expr '|' expr
|
||
{ $$ = ast_operation (BINOP_BITWISE_IOR, $1, $3); }
|
||
|
||
| expr '^' expr
|
||
{ $$ = ast_operation (BINOP_BITWISE_XOR, $1, $3); }
|
||
|
||
| expr '+' expr
|
||
{ $$ = ast_operation (BINOP_ADD, $1, $3); }
|
||
|
||
| expr '-' expr
|
||
{ $$ = ast_operation (BINOP_SUB, $1, $3); }
|
||
|
||
| expr OROR expr
|
||
{ $$ = ast_operation (BINOP_LOGICAL_OR, $1, $3); }
|
||
|
||
| expr ANDAND expr
|
||
{ $$ = ast_operation (BINOP_LOGICAL_AND, $1, $3); }
|
||
|
||
| expr EQEQ expr
|
||
{ $$ = ast_operation (BINOP_EQUAL, $1, $3); }
|
||
|
||
| expr NOTEQ expr
|
||
{ $$ = ast_operation (BINOP_NOTEQUAL, $1, $3); }
|
||
|
||
| expr LTEQ expr
|
||
{ $$ = ast_operation (BINOP_LEQ, $1, $3); }
|
||
|
||
| expr GTEQ expr
|
||
{ $$ = ast_operation (BINOP_GEQ, $1, $3); }
|
||
|
||
| expr LSH expr
|
||
{ $$ = ast_operation (BINOP_LSH, $1, $3); }
|
||
|
||
| expr RSH expr
|
||
{ $$ = ast_operation (BINOP_RSH, $1, $3); }
|
||
;
|
||
|
||
type_cast_expr:
|
||
expr KW_AS type
|
||
{ $$ = ast_cast ($1, $3); }
|
||
;
|
||
|
||
assignment_expr:
|
||
expr '=' expr
|
||
{ $$ = ast_operation (BINOP_ASSIGN, $1, $3); }
|
||
;
|
||
|
||
compound_assignment_expr:
|
||
expr COMPOUND_ASSIGN expr
|
||
{ $$ = ast_compound_assignment ($2, $1, $3); }
|
||
|
||
;
|
||
|
||
paren_expr:
|
||
'(' expr ')'
|
||
{ $$ = $2; }
|
||
;
|
||
|
||
expr_list:
|
||
expr
|
||
{
|
||
$$ = current_parser->new_op_vector ();
|
||
$$->push_back ($1);
|
||
}
|
||
| expr_list ',' expr
|
||
{
|
||
$1->push_back ($3);
|
||
$$ = $1;
|
||
}
|
||
;
|
||
|
||
maybe_expr_list:
|
||
/* %empty */
|
||
{
|
||
/* The result can't be NULL. */
|
||
$$ = current_parser->new_op_vector ();
|
||
}
|
||
| expr_list
|
||
{ $$ = $1; }
|
||
;
|
||
|
||
paren_expr_list:
|
||
'('
|
||
maybe_expr_list
|
||
')'
|
||
{ $$ = $2; }
|
||
;
|
||
|
||
call_expr:
|
||
expr paren_expr_list
|
||
{ $$ = ast_call_ish (OP_FUNCALL, $1, $2); }
|
||
;
|
||
|
||
maybe_self_path:
|
||
/* %empty */
|
||
| KW_SELF COLONCOLON
|
||
;
|
||
|
||
super_path:
|
||
KW_SUPER COLONCOLON
|
||
{ $$ = 1; }
|
||
| super_path KW_SUPER COLONCOLON
|
||
{ $$ = $1 + 1; }
|
||
;
|
||
|
||
path_expr:
|
||
path_for_expr
|
||
{ $$ = $1; }
|
||
| GDBVAR
|
||
{ $$ = ast_path ($1, NULL); }
|
||
| KW_SELF
|
||
{ $$ = ast_path (make_stoken ("self"), NULL); }
|
||
;
|
||
|
||
path_for_expr:
|
||
identifier_path_for_expr
|
||
| KW_SELF COLONCOLON identifier_path_for_expr
|
||
{ $$ = super_name ($3, 0); }
|
||
| maybe_self_path super_path identifier_path_for_expr
|
||
{ $$ = super_name ($3, $2); }
|
||
| COLONCOLON identifier_path_for_expr
|
||
{ $$ = crate_name ($2); }
|
||
| KW_EXTERN identifier_path_for_expr
|
||
{
|
||
/* This is a gdb extension to make it possible to
|
||
refer to items in other crates. It just bypasses
|
||
adding the current crate to the front of the
|
||
name. */
|
||
$$ = ast_path (rust_concat3 ("::", $2->left.sval.ptr, NULL),
|
||
$2->right.params);
|
||
}
|
||
;
|
||
|
||
identifier_path_for_expr:
|
||
IDENT
|
||
{ $$ = ast_path ($1, NULL); }
|
||
| identifier_path_for_expr COLONCOLON IDENT
|
||
{
|
||
$$ = ast_path (rust_concat3 ($1->left.sval.ptr, "::",
|
||
$3.ptr),
|
||
NULL);
|
||
}
|
||
| identifier_path_for_expr COLONCOLON '<' type_list '>'
|
||
{ $$ = ast_path ($1->left.sval, $4); }
|
||
| identifier_path_for_expr COLONCOLON '<' type_list RSH
|
||
{
|
||
$$ = ast_path ($1->left.sval, $4);
|
||
rust_push_back ('>');
|
||
}
|
||
;
|
||
|
||
path_for_type:
|
||
identifier_path_for_type
|
||
| KW_SELF COLONCOLON identifier_path_for_type
|
||
{ $$ = super_name ($3, 0); }
|
||
| maybe_self_path super_path identifier_path_for_type
|
||
{ $$ = super_name ($3, $2); }
|
||
| COLONCOLON identifier_path_for_type
|
||
{ $$ = crate_name ($2); }
|
||
| KW_EXTERN identifier_path_for_type
|
||
{
|
||
/* This is a gdb extension to make it possible to
|
||
refer to items in other crates. It just bypasses
|
||
adding the current crate to the front of the
|
||
name. */
|
||
$$ = ast_path (rust_concat3 ("::", $2->left.sval.ptr, NULL),
|
||
$2->right.params);
|
||
}
|
||
;
|
||
|
||
just_identifiers_for_type:
|
||
IDENT
|
||
{ $$ = ast_path ($1, NULL); }
|
||
| just_identifiers_for_type COLONCOLON IDENT
|
||
{
|
||
$$ = ast_path (rust_concat3 ($1->left.sval.ptr, "::",
|
||
$3.ptr),
|
||
NULL);
|
||
}
|
||
;
|
||
|
||
identifier_path_for_type:
|
||
just_identifiers_for_type
|
||
| just_identifiers_for_type '<' type_list '>'
|
||
{ $$ = ast_path ($1->left.sval, $3); }
|
||
| just_identifiers_for_type '<' type_list RSH
|
||
{
|
||
$$ = ast_path ($1->left.sval, $3);
|
||
rust_push_back ('>');
|
||
}
|
||
;
|
||
|
||
type:
|
||
path_for_type
|
||
| '[' type ';' INTEGER ']'
|
||
{ $$ = ast_array_type ($2, $4); }
|
||
| '[' type ';' DECIMAL_INTEGER ']'
|
||
{ $$ = ast_array_type ($2, $4); }
|
||
| '&' '[' type ']'
|
||
{ $$ = ast_slice_type ($3); }
|
||
| '&' type
|
||
{ $$ = ast_reference_type ($2); }
|
||
| '*' KW_MUT type
|
||
{ $$ = ast_pointer_type ($3, 1); }
|
||
| '*' KW_CONST type
|
||
{ $$ = ast_pointer_type ($3, 0); }
|
||
| KW_FN '(' maybe_type_list ')' ARROW type
|
||
{ $$ = ast_function_type ($6, $3); }
|
||
| '(' maybe_type_list ')'
|
||
{ $$ = ast_tuple_type ($2); }
|
||
;
|
||
|
||
maybe_type_list:
|
||
/* %empty */
|
||
{ $$ = NULL; }
|
||
| type_list
|
||
{ $$ = $1; }
|
||
;
|
||
|
||
type_list:
|
||
type
|
||
{
|
||
rust_op_vector *result = current_parser->new_op_vector ();
|
||
result->push_back ($1);
|
||
$$ = result;
|
||
}
|
||
| type_list ',' type
|
||
{
|
||
$1->push_back ($3);
|
||
$$ = $1;
|
||
}
|
||
;
|
||
|
||
%%
|
||
|
||
/* A struct of this type is used to describe a token. */
|
||
|
||
struct token_info
|
||
{
|
||
const char *name;
|
||
int value;
|
||
enum exp_opcode opcode;
|
||
};
|
||
|
||
/* Identifier tokens. */
|
||
|
||
static const struct token_info identifier_tokens[] =
|
||
{
|
||
{ "as", KW_AS, OP_NULL },
|
||
{ "false", KW_FALSE, OP_NULL },
|
||
{ "if", 0, OP_NULL },
|
||
{ "mut", KW_MUT, OP_NULL },
|
||
{ "const", KW_CONST, OP_NULL },
|
||
{ "self", KW_SELF, OP_NULL },
|
||
{ "super", KW_SUPER, OP_NULL },
|
||
{ "true", KW_TRUE, OP_NULL },
|
||
{ "extern", KW_EXTERN, OP_NULL },
|
||
{ "fn", KW_FN, OP_NULL },
|
||
{ "sizeof", KW_SIZEOF, OP_NULL },
|
||
};
|
||
|
||
/* Operator tokens, sorted longest first. */
|
||
|
||
static const struct token_info operator_tokens[] =
|
||
{
|
||
{ ">>=", COMPOUND_ASSIGN, BINOP_RSH },
|
||
{ "<<=", COMPOUND_ASSIGN, BINOP_LSH },
|
||
|
||
{ "<<", LSH, OP_NULL },
|
||
{ ">>", RSH, OP_NULL },
|
||
{ "&&", ANDAND, OP_NULL },
|
||
{ "||", OROR, OP_NULL },
|
||
{ "==", EQEQ, OP_NULL },
|
||
{ "!=", NOTEQ, OP_NULL },
|
||
{ "<=", LTEQ, OP_NULL },
|
||
{ ">=", GTEQ, OP_NULL },
|
||
{ "+=", COMPOUND_ASSIGN, BINOP_ADD },
|
||
{ "-=", COMPOUND_ASSIGN, BINOP_SUB },
|
||
{ "*=", COMPOUND_ASSIGN, BINOP_MUL },
|
||
{ "/=", COMPOUND_ASSIGN, BINOP_DIV },
|
||
{ "%=", COMPOUND_ASSIGN, BINOP_REM },
|
||
{ "&=", COMPOUND_ASSIGN, BINOP_BITWISE_AND },
|
||
{ "|=", COMPOUND_ASSIGN, BINOP_BITWISE_IOR },
|
||
{ "^=", COMPOUND_ASSIGN, BINOP_BITWISE_XOR },
|
||
|
||
{ "::", COLONCOLON, OP_NULL },
|
||
{ "..", DOTDOT, OP_NULL },
|
||
{ "->", ARROW, OP_NULL }
|
||
};
|
||
|
||
/* Helper function to copy to the name obstack. */
|
||
|
||
static const char *
|
||
rust_copy_name (const char *name, int len)
|
||
{
|
||
return (const char *) obstack_copy0 (work_obstack, name, len);
|
||
}
|
||
|
||
/* Helper function to make an stoken from a C string. */
|
||
|
||
static struct stoken
|
||
make_stoken (const char *p)
|
||
{
|
||
struct stoken result;
|
||
|
||
result.ptr = p;
|
||
result.length = strlen (result.ptr);
|
||
return result;
|
||
}
|
||
|
||
/* Helper function to concatenate three strings on the name
|
||
obstack. */
|
||
|
||
static struct stoken
|
||
rust_concat3 (const char *s1, const char *s2, const char *s3)
|
||
{
|
||
return make_stoken (obconcat (work_obstack, s1, s2, s3, (char *) NULL));
|
||
}
|
||
|
||
/* Return an AST node referring to NAME, but relative to the crate's
|
||
name. */
|
||
|
||
static const struct rust_op *
|
||
crate_name (const struct rust_op *name)
|
||
{
|
||
std::string crate = rust_crate_for_block (expression_context_block);
|
||
struct stoken result;
|
||
|
||
gdb_assert (name->opcode == OP_VAR_VALUE);
|
||
|
||
if (crate.empty ())
|
||
error (_("Could not find crate for current location"));
|
||
result = make_stoken (obconcat (work_obstack, "::", crate.c_str (), "::",
|
||
name->left.sval.ptr, (char *) NULL));
|
||
|
||
return ast_path (result, name->right.params);
|
||
}
|
||
|
||
/* Create an AST node referring to a "super::" qualified name. IDENT
|
||
is the base name and N_SUPERS is how many "super::"s were
|
||
provided. N_SUPERS can be zero. */
|
||
|
||
static const struct rust_op *
|
||
super_name (const struct rust_op *ident, unsigned int n_supers)
|
||
{
|
||
const char *scope = block_scope (expression_context_block);
|
||
int offset;
|
||
|
||
gdb_assert (ident->opcode == OP_VAR_VALUE);
|
||
|
||
if (scope[0] == '\0')
|
||
error (_("Couldn't find namespace scope for self::"));
|
||
|
||
if (n_supers > 0)
|
||
{
|
||
int i;
|
||
int len;
|
||
std::vector<int> offsets;
|
||
unsigned int current_len;
|
||
|
||
current_len = cp_find_first_component (scope);
|
||
while (scope[current_len] != '\0')
|
||
{
|
||
offsets.push_back (current_len);
|
||
gdb_assert (scope[current_len] == ':');
|
||
/* The "::". */
|
||
current_len += 2;
|
||
current_len += cp_find_first_component (scope
|
||
+ current_len);
|
||
}
|
||
|
||
len = offsets.size ();
|
||
if (n_supers >= len)
|
||
error (_("Too many super:: uses from '%s'"), scope);
|
||
|
||
offset = offsets[len - n_supers];
|
||
}
|
||
else
|
||
offset = strlen (scope);
|
||
|
||
obstack_grow (work_obstack, "::", 2);
|
||
obstack_grow (work_obstack, scope, offset);
|
||
obstack_grow (work_obstack, "::", 2);
|
||
obstack_grow0 (work_obstack, ident->left.sval.ptr, ident->left.sval.length);
|
||
|
||
return ast_path (make_stoken ((const char *) obstack_finish (work_obstack)),
|
||
ident->right.params);
|
||
}
|
||
|
||
/* A helper that updates innermost_block as appropriate. */
|
||
|
||
static void
|
||
update_innermost_block (struct block_symbol sym)
|
||
{
|
||
if (symbol_read_needs_frame (sym.symbol)
|
||
&& (innermost_block == NULL
|
||
|| contained_in (sym.block, innermost_block)))
|
||
innermost_block = sym.block;
|
||
}
|
||
|
||
/* A helper to look up a Rust type, or fail. This only works for
|
||
types defined by rust_language_arch_info. */
|
||
|
||
static struct type *
|
||
rust_type (const char *name)
|
||
{
|
||
struct type *type;
|
||
|
||
/* When unit testing, we don't bother checking the types, so avoid a
|
||
possibly-failing lookup here. */
|
||
if (unit_testing)
|
||
return NULL;
|
||
|
||
type = language_lookup_primitive_type (current_parser->language (),
|
||
current_parser->arch (),
|
||
name);
|
||
if (type == NULL)
|
||
error (_("Could not find Rust type %s"), name);
|
||
return type;
|
||
}
|
||
|
||
/* Lex a hex number with at least MIN digits and at most MAX
|
||
digits. */
|
||
|
||
static uint32_t
|
||
lex_hex (int min, int max)
|
||
{
|
||
uint32_t result = 0;
|
||
int len = 0;
|
||
/* We only want to stop at MAX if we're lexing a byte escape. */
|
||
int check_max = min == max;
|
||
|
||
while ((check_max ? len <= max : 1)
|
||
&& ((lexptr[0] >= 'a' && lexptr[0] <= 'f')
|
||
|| (lexptr[0] >= 'A' && lexptr[0] <= 'F')
|
||
|| (lexptr[0] >= '0' && lexptr[0] <= '9')))
|
||
{
|
||
result *= 16;
|
||
if (lexptr[0] >= 'a' && lexptr[0] <= 'f')
|
||
result = result + 10 + lexptr[0] - 'a';
|
||
else if (lexptr[0] >= 'A' && lexptr[0] <= 'F')
|
||
result = result + 10 + lexptr[0] - 'A';
|
||
else
|
||
result = result + lexptr[0] - '0';
|
||
++lexptr;
|
||
++len;
|
||
}
|
||
|
||
if (len < min)
|
||
error (_("Not enough hex digits seen"));
|
||
if (len > max)
|
||
{
|
||
gdb_assert (min != max);
|
||
error (_("Overlong hex escape"));
|
||
}
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Lex an escape. IS_BYTE is true if we're lexing a byte escape;
|
||
otherwise we're lexing a character escape. */
|
||
|
||
static uint32_t
|
||
lex_escape (int is_byte)
|
||
{
|
||
uint32_t result;
|
||
|
||
gdb_assert (lexptr[0] == '\\');
|
||
++lexptr;
|
||
switch (lexptr[0])
|
||
{
|
||
case 'x':
|
||
++lexptr;
|
||
result = lex_hex (2, 2);
|
||
break;
|
||
|
||
case 'u':
|
||
if (is_byte)
|
||
error (_("Unicode escape in byte literal"));
|
||
++lexptr;
|
||
if (lexptr[0] != '{')
|
||
error (_("Missing '{' in Unicode escape"));
|
||
++lexptr;
|
||
result = lex_hex (1, 6);
|
||
/* Could do range checks here. */
|
||
if (lexptr[0] != '}')
|
||
error (_("Missing '}' in Unicode escape"));
|
||
++lexptr;
|
||
break;
|
||
|
||
case 'n':
|
||
result = '\n';
|
||
++lexptr;
|
||
break;
|
||
case 'r':
|
||
result = '\r';
|
||
++lexptr;
|
||
break;
|
||
case 't':
|
||
result = '\t';
|
||
++lexptr;
|
||
break;
|
||
case '\\':
|
||
result = '\\';
|
||
++lexptr;
|
||
break;
|
||
case '0':
|
||
result = '\0';
|
||
++lexptr;
|
||
break;
|
||
case '\'':
|
||
result = '\'';
|
||
++lexptr;
|
||
break;
|
||
case '"':
|
||
result = '"';
|
||
++lexptr;
|
||
break;
|
||
|
||
default:
|
||
error (_("Invalid escape \\%c in literal"), lexptr[0]);
|
||
}
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Lex a character constant. */
|
||
|
||
static int
|
||
lex_character (void)
|
||
{
|
||
int is_byte = 0;
|
||
uint32_t value;
|
||
|
||
if (lexptr[0] == 'b')
|
||
{
|
||
is_byte = 1;
|
||
++lexptr;
|
||
}
|
||
gdb_assert (lexptr[0] == '\'');
|
||
++lexptr;
|
||
/* This should handle UTF-8 here. */
|
||
if (lexptr[0] == '\\')
|
||
value = lex_escape (is_byte);
|
||
else
|
||
{
|
||
value = lexptr[0] & 0xff;
|
||
++lexptr;
|
||
}
|
||
|
||
if (lexptr[0] != '\'')
|
||
error (_("Unterminated character literal"));
|
||
++lexptr;
|
||
|
||
rustyylval.typed_val_int.val = value;
|
||
rustyylval.typed_val_int.type = rust_type (is_byte ? "u8" : "char");
|
||
|
||
return INTEGER;
|
||
}
|
||
|
||
/* Return the offset of the double quote if STR looks like the start
|
||
of a raw string, or 0 if STR does not start a raw string. */
|
||
|
||
static int
|
||
starts_raw_string (const char *str)
|
||
{
|
||
const char *save = str;
|
||
|
||
if (str[0] != 'r')
|
||
return 0;
|
||
++str;
|
||
while (str[0] == '#')
|
||
++str;
|
||
if (str[0] == '"')
|
||
return str - save;
|
||
return 0;
|
||
}
|
||
|
||
/* Return true if STR looks like the end of a raw string that had N
|
||
hashes at the start. */
|
||
|
||
static bool
|
||
ends_raw_string (const char *str, int n)
|
||
{
|
||
int i;
|
||
|
||
gdb_assert (str[0] == '"');
|
||
for (i = 0; i < n; ++i)
|
||
if (str[i + 1] != '#')
|
||
return false;
|
||
return true;
|
||
}
|
||
|
||
/* Lex a string constant. */
|
||
|
||
static int
|
||
lex_string (void)
|
||
{
|
||
int is_byte = lexptr[0] == 'b';
|
||
int raw_length;
|
||
int len_in_chars = 0;
|
||
|
||
if (is_byte)
|
||
++lexptr;
|
||
raw_length = starts_raw_string (lexptr);
|
||
lexptr += raw_length;
|
||
gdb_assert (lexptr[0] == '"');
|
||
++lexptr;
|
||
|
||
while (1)
|
||
{
|
||
uint32_t value;
|
||
|
||
if (raw_length > 0)
|
||
{
|
||
if (lexptr[0] == '"' && ends_raw_string (lexptr, raw_length - 1))
|
||
{
|
||
/* Exit with lexptr pointing after the final "#". */
|
||
lexptr += raw_length;
|
||
break;
|
||
}
|
||
else if (lexptr[0] == '\0')
|
||
error (_("Unexpected EOF in string"));
|
||
|
||
value = lexptr[0] & 0xff;
|
||
if (is_byte && value > 127)
|
||
error (_("Non-ASCII value in raw byte string"));
|
||
obstack_1grow (work_obstack, value);
|
||
|
||
++lexptr;
|
||
}
|
||
else if (lexptr[0] == '"')
|
||
{
|
||
/* Make sure to skip the quote. */
|
||
++lexptr;
|
||
break;
|
||
}
|
||
else if (lexptr[0] == '\\')
|
||
{
|
||
value = lex_escape (is_byte);
|
||
|
||
if (is_byte)
|
||
obstack_1grow (work_obstack, value);
|
||
else
|
||
convert_between_encodings ("UTF-32", "UTF-8", (gdb_byte *) &value,
|
||
sizeof (value), sizeof (value),
|
||
work_obstack, translit_none);
|
||
}
|
||
else if (lexptr[0] == '\0')
|
||
error (_("Unexpected EOF in string"));
|
||
else
|
||
{
|
||
value = lexptr[0] & 0xff;
|
||
if (is_byte && value > 127)
|
||
error (_("Non-ASCII value in byte string"));
|
||
obstack_1grow (work_obstack, value);
|
||
++lexptr;
|
||
}
|
||
}
|
||
|
||
rustyylval.sval.length = obstack_object_size (work_obstack);
|
||
rustyylval.sval.ptr = (const char *) obstack_finish (work_obstack);
|
||
return is_byte ? BYTESTRING : STRING;
|
||
}
|
||
|
||
/* Return true if STRING starts with whitespace followed by a digit. */
|
||
|
||
static bool
|
||
space_then_number (const char *string)
|
||
{
|
||
const char *p = string;
|
||
|
||
while (p[0] == ' ' || p[0] == '\t')
|
||
++p;
|
||
if (p == string)
|
||
return false;
|
||
|
||
return *p >= '0' && *p <= '9';
|
||
}
|
||
|
||
/* Return true if C can start an identifier. */
|
||
|
||
static bool
|
||
rust_identifier_start_p (char c)
|
||
{
|
||
return ((c >= 'a' && c <= 'z')
|
||
|| (c >= 'A' && c <= 'Z')
|
||
|| c == '_'
|
||
|| c == '$');
|
||
}
|
||
|
||
/* Lex an identifier. */
|
||
|
||
static int
|
||
lex_identifier (void)
|
||
{
|
||
const char *start = lexptr;
|
||
unsigned int length;
|
||
const struct token_info *token;
|
||
int i;
|
||
int is_gdb_var = lexptr[0] == '$';
|
||
|
||
gdb_assert (rust_identifier_start_p (lexptr[0]));
|
||
|
||
++lexptr;
|
||
|
||
/* For the time being this doesn't handle Unicode rules. Non-ASCII
|
||
identifiers are gated anyway. */
|
||
while ((lexptr[0] >= 'a' && lexptr[0] <= 'z')
|
||
|| (lexptr[0] >= 'A' && lexptr[0] <= 'Z')
|
||
|| lexptr[0] == '_'
|
||
|| (is_gdb_var && lexptr[0] == '$')
|
||
|| (lexptr[0] >= '0' && lexptr[0] <= '9'))
|
||
++lexptr;
|
||
|
||
|
||
length = lexptr - start;
|
||
token = NULL;
|
||
for (i = 0; i < ARRAY_SIZE (identifier_tokens); ++i)
|
||
{
|
||
if (length == strlen (identifier_tokens[i].name)
|
||
&& strncmp (identifier_tokens[i].name, start, length) == 0)
|
||
{
|
||
token = &identifier_tokens[i];
|
||
break;
|
||
}
|
||
}
|
||
|
||
if (token != NULL)
|
||
{
|
||
if (token->value == 0)
|
||
{
|
||
/* Leave the terminating token alone. */
|
||
lexptr = start;
|
||
return 0;
|
||
}
|
||
}
|
||
else if (token == NULL
|
||
&& (strncmp (start, "thread", length) == 0
|
||
|| strncmp (start, "task", length) == 0)
|
||
&& space_then_number (lexptr))
|
||
{
|
||
/* "task" or "thread" followed by a number terminates the
|
||
parse, per gdb rules. */
|
||
lexptr = start;
|
||
return 0;
|
||
}
|
||
|
||
if (token == NULL || (parse_completion && lexptr[0] == '\0'))
|
||
rustyylval.sval = make_stoken (rust_copy_name (start, length));
|
||
|
||
if (parse_completion && lexptr[0] == '\0')
|
||
{
|
||
/* Prevent rustyylex from returning two COMPLETE tokens. */
|
||
prev_lexptr = lexptr;
|
||
return COMPLETE;
|
||
}
|
||
|
||
if (token != NULL)
|
||
return token->value;
|
||
if (is_gdb_var)
|
||
return GDBVAR;
|
||
return IDENT;
|
||
}
|
||
|
||
/* Lex an operator. */
|
||
|
||
static int
|
||
lex_operator (void)
|
||
{
|
||
const struct token_info *token = NULL;
|
||
int i;
|
||
|
||
for (i = 0; i < ARRAY_SIZE (operator_tokens); ++i)
|
||
{
|
||
if (strncmp (operator_tokens[i].name, lexptr,
|
||
strlen (operator_tokens[i].name)) == 0)
|
||
{
|
||
lexptr += strlen (operator_tokens[i].name);
|
||
token = &operator_tokens[i];
|
||
break;
|
||
}
|
||
}
|
||
|
||
if (token != NULL)
|
||
{
|
||
rustyylval.opcode = token->opcode;
|
||
return token->value;
|
||
}
|
||
|
||
return *lexptr++;
|
||
}
|
||
|
||
/* Lex a number. */
|
||
|
||
static int
|
||
lex_number (void)
|
||
{
|
||
regmatch_t subexps[NUM_SUBEXPRESSIONS];
|
||
int match;
|
||
int is_integer = 0;
|
||
int could_be_decimal = 1;
|
||
int implicit_i32 = 0;
|
||
const char *type_name = NULL;
|
||
struct type *type;
|
||
int end_index;
|
||
int type_index = -1;
|
||
int i;
|
||
|
||
match = regexec (&number_regex, lexptr, ARRAY_SIZE (subexps), subexps, 0);
|
||
/* Failure means the regexp is broken. */
|
||
gdb_assert (match == 0);
|
||
|
||
if (subexps[INT_TEXT].rm_so != -1)
|
||
{
|
||
/* Integer part matched. */
|
||
is_integer = 1;
|
||
end_index = subexps[INT_TEXT].rm_eo;
|
||
if (subexps[INT_TYPE].rm_so == -1)
|
||
{
|
||
type_name = "i32";
|
||
implicit_i32 = 1;
|
||
}
|
||
else
|
||
{
|
||
type_index = INT_TYPE;
|
||
could_be_decimal = 0;
|
||
}
|
||
}
|
||
else if (subexps[FLOAT_TYPE1].rm_so != -1)
|
||
{
|
||
/* Found floating point type suffix. */
|
||
end_index = subexps[FLOAT_TYPE1].rm_so;
|
||
type_index = FLOAT_TYPE1;
|
||
}
|
||
else if (subexps[FLOAT_TYPE2].rm_so != -1)
|
||
{
|
||
/* Found floating point type suffix. */
|
||
end_index = subexps[FLOAT_TYPE2].rm_so;
|
||
type_index = FLOAT_TYPE2;
|
||
}
|
||
else
|
||
{
|
||
/* Any other floating point match. */
|
||
end_index = subexps[0].rm_eo;
|
||
type_name = "f64";
|
||
}
|
||
|
||
/* We need a special case if the final character is ".". In this
|
||
case we might need to parse an integer. For example, "23.f()" is
|
||
a request for a trait method call, not a syntax error involving
|
||
the floating point number "23.". */
|
||
gdb_assert (subexps[0].rm_eo > 0);
|
||
if (lexptr[subexps[0].rm_eo - 1] == '.')
|
||
{
|
||
const char *next = skip_spaces_const (&lexptr[subexps[0].rm_eo]);
|
||
|
||
if (rust_identifier_start_p (*next) || *next == '.')
|
||
{
|
||
--subexps[0].rm_eo;
|
||
is_integer = 1;
|
||
end_index = subexps[0].rm_eo;
|
||
type_name = "i32";
|
||
could_be_decimal = 1;
|
||
implicit_i32 = 1;
|
||
}
|
||
}
|
||
|
||
/* Compute the type name if we haven't already. */
|
||
std::string type_name_holder;
|
||
if (type_name == NULL)
|
||
{
|
||
gdb_assert (type_index != -1);
|
||
type_name_holder = std::string (lexptr + subexps[type_index].rm_so,
|
||
(subexps[type_index].rm_eo
|
||
- subexps[type_index].rm_so));
|
||
type_name = type_name_holder.c_str ();
|
||
}
|
||
|
||
/* Look up the type. */
|
||
type = rust_type (type_name);
|
||
|
||
/* Copy the text of the number and remove the "_"s. */
|
||
std::string number;
|
||
for (i = 0; i < end_index && lexptr[i]; ++i)
|
||
{
|
||
if (lexptr[i] == '_')
|
||
could_be_decimal = 0;
|
||
else
|
||
number.push_back (lexptr[i]);
|
||
}
|
||
|
||
/* Advance past the match. */
|
||
lexptr += subexps[0].rm_eo;
|
||
|
||
/* Parse the number. */
|
||
if (is_integer)
|
||
{
|
||
uint64_t value;
|
||
int radix = 10;
|
||
int offset = 0;
|
||
|
||
if (number[0] == '0')
|
||
{
|
||
if (number[1] == 'x')
|
||
radix = 16;
|
||
else if (number[1] == 'o')
|
||
radix = 8;
|
||
else if (number[1] == 'b')
|
||
radix = 2;
|
||
if (radix != 10)
|
||
{
|
||
offset = 2;
|
||
could_be_decimal = 0;
|
||
}
|
||
}
|
||
|
||
value = strtoul (number.c_str () + offset, NULL, radix);
|
||
if (implicit_i32 && value >= ((uint64_t) 1) << 31)
|
||
type = rust_type ("i64");
|
||
|
||
rustyylval.typed_val_int.val = value;
|
||
rustyylval.typed_val_int.type = type;
|
||
}
|
||
else
|
||
{
|
||
rustyylval.typed_val_float.dval = strtod (number.c_str (), NULL);
|
||
rustyylval.typed_val_float.type = type;
|
||
}
|
||
|
||
return is_integer ? (could_be_decimal ? DECIMAL_INTEGER : INTEGER) : FLOAT;
|
||
}
|
||
|
||
/* The lexer. */
|
||
|
||
static int
|
||
rustyylex (void)
|
||
{
|
||
/* Skip all leading whitespace. */
|
||
while (lexptr[0] == ' ' || lexptr[0] == '\t' || lexptr[0] == '\r'
|
||
|| lexptr[0] == '\n')
|
||
++lexptr;
|
||
|
||
/* If we hit EOF and we're completing, then return COMPLETE -- maybe
|
||
we're completing an empty string at the end of a field_expr.
|
||
But, we don't want to return two COMPLETE tokens in a row. */
|
||
if (lexptr[0] == '\0' && lexptr == prev_lexptr)
|
||
return 0;
|
||
prev_lexptr = lexptr;
|
||
if (lexptr[0] == '\0')
|
||
{
|
||
if (parse_completion)
|
||
{
|
||
rustyylval.sval = make_stoken ("");
|
||
return COMPLETE;
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
if (lexptr[0] >= '0' && lexptr[0] <= '9')
|
||
return lex_number ();
|
||
else if (lexptr[0] == 'b' && lexptr[1] == '\'')
|
||
return lex_character ();
|
||
else if (lexptr[0] == 'b' && lexptr[1] == '"')
|
||
return lex_string ();
|
||
else if (lexptr[0] == 'b' && starts_raw_string (lexptr + 1))
|
||
return lex_string ();
|
||
else if (starts_raw_string (lexptr))
|
||
return lex_string ();
|
||
else if (rust_identifier_start_p (lexptr[0]))
|
||
return lex_identifier ();
|
||
else if (lexptr[0] == '"')
|
||
return lex_string ();
|
||
else if (lexptr[0] == '\'')
|
||
return lex_character ();
|
||
else if (lexptr[0] == '}' || lexptr[0] == ']')
|
||
{
|
||
/* Falls through to lex_operator. */
|
||
--paren_depth;
|
||
}
|
||
else if (lexptr[0] == '(' || lexptr[0] == '{')
|
||
{
|
||
/* Falls through to lex_operator. */
|
||
++paren_depth;
|
||
}
|
||
else if (lexptr[0] == ',' && comma_terminates && paren_depth == 0)
|
||
return 0;
|
||
|
||
return lex_operator ();
|
||
}
|
||
|
||
/* Push back a single character to be re-lexed. */
|
||
|
||
static void
|
||
rust_push_back (char c)
|
||
{
|
||
/* Can't be called before any lexing. */
|
||
gdb_assert (prev_lexptr != NULL);
|
||
|
||
--lexptr;
|
||
gdb_assert (*lexptr == c);
|
||
}
|
||
|
||
|
||
|
||
/* Make an arbitrary operation and fill in the fields. */
|
||
|
||
static const struct rust_op *
|
||
ast_operation (enum exp_opcode opcode, const struct rust_op *left,
|
||
const struct rust_op *right)
|
||
{
|
||
struct rust_op *result = OBSTACK_ZALLOC (work_obstack, struct rust_op);
|
||
|
||
result->opcode = opcode;
|
||
result->left.op = left;
|
||
result->right.op = right;
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Make a compound assignment operation. */
|
||
|
||
static const struct rust_op *
|
||
ast_compound_assignment (enum exp_opcode opcode, const struct rust_op *left,
|
||
const struct rust_op *right)
|
||
{
|
||
struct rust_op *result = OBSTACK_ZALLOC (work_obstack, struct rust_op);
|
||
|
||
result->opcode = opcode;
|
||
result->compound_assignment = 1;
|
||
result->left.op = left;
|
||
result->right.op = right;
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Make a typed integer literal operation. */
|
||
|
||
static const struct rust_op *
|
||
ast_literal (struct typed_val_int val)
|
||
{
|
||
struct rust_op *result = OBSTACK_ZALLOC (work_obstack, struct rust_op);
|
||
|
||
result->opcode = OP_LONG;
|
||
result->left.typed_val_int = val;
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Make a typed floating point literal operation. */
|
||
|
||
static const struct rust_op *
|
||
ast_dliteral (struct typed_val_float val)
|
||
{
|
||
struct rust_op *result = OBSTACK_ZALLOC (work_obstack, struct rust_op);
|
||
|
||
result->opcode = OP_DOUBLE;
|
||
result->left.typed_val_float = val;
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Make a unary operation. */
|
||
|
||
static const struct rust_op *
|
||
ast_unary (enum exp_opcode opcode, const struct rust_op *expr)
|
||
{
|
||
return ast_operation (opcode, expr, NULL);
|
||
}
|
||
|
||
/* Make a cast operation. */
|
||
|
||
static const struct rust_op *
|
||
ast_cast (const struct rust_op *expr, const struct rust_op *type)
|
||
{
|
||
struct rust_op *result = OBSTACK_ZALLOC (work_obstack, struct rust_op);
|
||
|
||
result->opcode = UNOP_CAST;
|
||
result->left.op = expr;
|
||
result->right.op = type;
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Make a call-like operation. This is nominally a function call, but
|
||
when lowering we may discover that it actually represents the
|
||
creation of a tuple struct. */
|
||
|
||
static const struct rust_op *
|
||
ast_call_ish (enum exp_opcode opcode, const struct rust_op *expr,
|
||
rust_op_vector *params)
|
||
{
|
||
struct rust_op *result = OBSTACK_ZALLOC (work_obstack, struct rust_op);
|
||
|
||
result->opcode = opcode;
|
||
result->left.op = expr;
|
||
result->right.params = params;
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Make a structure creation operation. */
|
||
|
||
static const struct rust_op *
|
||
ast_struct (const struct rust_op *name, rust_set_vector *fields)
|
||
{
|
||
struct rust_op *result = OBSTACK_ZALLOC (work_obstack, struct rust_op);
|
||
|
||
result->opcode = OP_AGGREGATE;
|
||
result->left.op = name;
|
||
result->right.field_inits = fields;
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Make an identifier path. */
|
||
|
||
static const struct rust_op *
|
||
ast_path (struct stoken path, rust_op_vector *params)
|
||
{
|
||
struct rust_op *result = OBSTACK_ZALLOC (work_obstack, struct rust_op);
|
||
|
||
result->opcode = OP_VAR_VALUE;
|
||
result->left.sval = path;
|
||
result->right.params = params;
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Make a string constant operation. */
|
||
|
||
static const struct rust_op *
|
||
ast_string (struct stoken str)
|
||
{
|
||
struct rust_op *result = OBSTACK_ZALLOC (work_obstack, struct rust_op);
|
||
|
||
result->opcode = OP_STRING;
|
||
result->left.sval = str;
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Make a field expression. */
|
||
|
||
static const struct rust_op *
|
||
ast_structop (const struct rust_op *left, const char *name, int completing)
|
||
{
|
||
struct rust_op *result = OBSTACK_ZALLOC (work_obstack, struct rust_op);
|
||
|
||
result->opcode = STRUCTOP_STRUCT;
|
||
result->completing = completing;
|
||
result->left.op = left;
|
||
result->right.sval = make_stoken (name);
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Make an anonymous struct operation, like 'x.0'. */
|
||
|
||
static const struct rust_op *
|
||
ast_structop_anonymous (const struct rust_op *left,
|
||
struct typed_val_int number)
|
||
{
|
||
struct rust_op *result = OBSTACK_ZALLOC (work_obstack, struct rust_op);
|
||
|
||
result->opcode = STRUCTOP_ANONYMOUS;
|
||
result->left.op = left;
|
||
result->right.typed_val_int = number;
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Make a range operation. */
|
||
|
||
static const struct rust_op *
|
||
ast_range (const struct rust_op *lhs, const struct rust_op *rhs)
|
||
{
|
||
struct rust_op *result = OBSTACK_ZALLOC (work_obstack, struct rust_op);
|
||
|
||
result->opcode = OP_RANGE;
|
||
result->left.op = lhs;
|
||
result->right.op = rhs;
|
||
|
||
return result;
|
||
}
|
||
|
||
/* A helper function to make a type-related AST node. */
|
||
|
||
static struct rust_op *
|
||
ast_basic_type (enum type_code typecode)
|
||
{
|
||
struct rust_op *result = OBSTACK_ZALLOC (work_obstack, struct rust_op);
|
||
|
||
result->opcode = OP_TYPE;
|
||
result->typecode = typecode;
|
||
return result;
|
||
}
|
||
|
||
/* Create an AST node describing an array type. */
|
||
|
||
static const struct rust_op *
|
||
ast_array_type (const struct rust_op *lhs, struct typed_val_int val)
|
||
{
|
||
struct rust_op *result = ast_basic_type (TYPE_CODE_ARRAY);
|
||
|
||
result->left.op = lhs;
|
||
result->right.typed_val_int = val;
|
||
return result;
|
||
}
|
||
|
||
/* Create an AST node describing a reference type. */
|
||
|
||
static const struct rust_op *
|
||
ast_slice_type (const struct rust_op *type)
|
||
{
|
||
/* Use TYPE_CODE_COMPLEX just because it is handy. */
|
||
struct rust_op *result = ast_basic_type (TYPE_CODE_COMPLEX);
|
||
|
||
result->left.op = type;
|
||
return result;
|
||
}
|
||
|
||
/* Create an AST node describing a reference type. */
|
||
|
||
static const struct rust_op *
|
||
ast_reference_type (const struct rust_op *type)
|
||
{
|
||
struct rust_op *result = ast_basic_type (TYPE_CODE_REF);
|
||
|
||
result->left.op = type;
|
||
return result;
|
||
}
|
||
|
||
/* Create an AST node describing a pointer type. */
|
||
|
||
static const struct rust_op *
|
||
ast_pointer_type (const struct rust_op *type, int is_mut)
|
||
{
|
||
struct rust_op *result = ast_basic_type (TYPE_CODE_PTR);
|
||
|
||
result->left.op = type;
|
||
/* For the time being we ignore is_mut. */
|
||
return result;
|
||
}
|
||
|
||
/* Create an AST node describing a function type. */
|
||
|
||
static const struct rust_op *
|
||
ast_function_type (const struct rust_op *rtype, rust_op_vector *params)
|
||
{
|
||
struct rust_op *result = ast_basic_type (TYPE_CODE_FUNC);
|
||
|
||
result->left.op = rtype;
|
||
result->right.params = params;
|
||
return result;
|
||
}
|
||
|
||
/* Create an AST node describing a tuple type. */
|
||
|
||
static const struct rust_op *
|
||
ast_tuple_type (rust_op_vector *params)
|
||
{
|
||
struct rust_op *result = ast_basic_type (TYPE_CODE_STRUCT);
|
||
|
||
result->left.params = params;
|
||
return result;
|
||
}
|
||
|
||
/* A helper to appropriately munge NAME and BLOCK depending on the
|
||
presence of a leading "::". */
|
||
|
||
static void
|
||
munge_name_and_block (const char **name, const struct block **block)
|
||
{
|
||
/* If it is a global reference, skip the current block in favor of
|
||
the static block. */
|
||
if (strncmp (*name, "::", 2) == 0)
|
||
{
|
||
*name += 2;
|
||
*block = block_static_block (*block);
|
||
}
|
||
}
|
||
|
||
/* Like lookup_symbol, but handles Rust namespace conventions, and
|
||
doesn't require field_of_this_result. */
|
||
|
||
static struct block_symbol
|
||
rust_lookup_symbol (const char *name, const struct block *block,
|
||
const domain_enum domain)
|
||
{
|
||
struct block_symbol result;
|
||
|
||
munge_name_and_block (&name, &block);
|
||
|
||
result = lookup_symbol (name, block, domain, NULL);
|
||
if (result.symbol != NULL)
|
||
update_innermost_block (result);
|
||
return result;
|
||
}
|
||
|
||
/* Look up a type, following Rust namespace conventions. */
|
||
|
||
static struct type *
|
||
rust_lookup_type (const char *name, const struct block *block)
|
||
{
|
||
struct block_symbol result;
|
||
struct type *type;
|
||
|
||
munge_name_and_block (&name, &block);
|
||
|
||
result = lookup_symbol (name, block, STRUCT_DOMAIN, NULL);
|
||
if (result.symbol != NULL)
|
||
{
|
||
update_innermost_block (result);
|
||
return SYMBOL_TYPE (result.symbol);
|
||
}
|
||
|
||
type = lookup_typename (current_parser->language (), current_parser->arch (),
|
||
name, NULL, 1);
|
||
if (type != NULL)
|
||
return type;
|
||
|
||
/* Last chance, try a built-in type. */
|
||
return language_lookup_primitive_type (current_parser->language (),
|
||
current_parser->arch (),
|
||
name);
|
||
}
|
||
|
||
static struct type *convert_ast_to_type (struct parser_state *state,
|
||
const struct rust_op *operation);
|
||
static const char *convert_name (struct parser_state *state,
|
||
const struct rust_op *operation);
|
||
|
||
/* Convert a vector of rust_ops representing types to a vector of
|
||
types. */
|
||
|
||
static std::vector<struct type *>
|
||
convert_params_to_types (struct parser_state *state, rust_op_vector *params)
|
||
{
|
||
std::vector<struct type *> result;
|
||
|
||
for (const rust_op *op : *params)
|
||
result.push_back (convert_ast_to_type (state, op));
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Convert a rust_op representing a type to a struct type *. */
|
||
|
||
static struct type *
|
||
convert_ast_to_type (struct parser_state *state,
|
||
const struct rust_op *operation)
|
||
{
|
||
struct type *type, *result = NULL;
|
||
|
||
if (operation->opcode == OP_VAR_VALUE)
|
||
{
|
||
const char *varname = convert_name (state, operation);
|
||
|
||
result = rust_lookup_type (varname, expression_context_block);
|
||
if (result == NULL)
|
||
error (_("No typed name '%s' in current context"), varname);
|
||
return result;
|
||
}
|
||
|
||
gdb_assert (operation->opcode == OP_TYPE);
|
||
|
||
switch (operation->typecode)
|
||
{
|
||
case TYPE_CODE_ARRAY:
|
||
type = convert_ast_to_type (state, operation->left.op);
|
||
if (operation->right.typed_val_int.val < 0)
|
||
error (_("Negative array length"));
|
||
result = lookup_array_range_type (type, 0,
|
||
operation->right.typed_val_int.val - 1);
|
||
break;
|
||
|
||
case TYPE_CODE_COMPLEX:
|
||
{
|
||
struct type *usize = rust_type ("usize");
|
||
|
||
type = convert_ast_to_type (state, operation->left.op);
|
||
result = rust_slice_type ("&[*gdb*]", type, usize);
|
||
}
|
||
break;
|
||
|
||
case TYPE_CODE_REF:
|
||
case TYPE_CODE_PTR:
|
||
/* For now we treat &x and *x identically. */
|
||
type = convert_ast_to_type (state, operation->left.op);
|
||
result = lookup_pointer_type (type);
|
||
break;
|
||
|
||
case TYPE_CODE_FUNC:
|
||
{
|
||
std::vector<struct type *> args
|
||
(convert_params_to_types (state, operation->right.params));
|
||
struct type **argtypes = NULL;
|
||
|
||
type = convert_ast_to_type (state, operation->left.op);
|
||
if (!args.empty ())
|
||
argtypes = args.data ();
|
||
|
||
result
|
||
= lookup_function_type_with_arguments (type, args.size (),
|
||
argtypes);
|
||
result = lookup_pointer_type (result);
|
||
}
|
||
break;
|
||
|
||
case TYPE_CODE_STRUCT:
|
||
{
|
||
std::vector<struct type *> args
|
||
(convert_params_to_types (state, operation->left.params));
|
||
int i;
|
||
struct type *type;
|
||
const char *name;
|
||
|
||
obstack_1grow (work_obstack, '(');
|
||
for (i = 0; i < args.size (); ++i)
|
||
{
|
||
std::string type_name = type_to_string (args[i]);
|
||
|
||
if (i > 0)
|
||
obstack_1grow (work_obstack, ',');
|
||
obstack_grow_str (work_obstack, type_name.c_str ());
|
||
}
|
||
|
||
obstack_grow_str0 (work_obstack, ")");
|
||
name = (const char *) obstack_finish (work_obstack);
|
||
|
||
/* We don't allow creating new tuple types (yet), but we do
|
||
allow looking up existing tuple types. */
|
||
result = rust_lookup_type (name, expression_context_block);
|
||
if (result == NULL)
|
||
error (_("could not find tuple type '%s'"), name);
|
||
}
|
||
break;
|
||
|
||
default:
|
||
gdb_assert_not_reached ("unhandled opcode in convert_ast_to_type");
|
||
}
|
||
|
||
gdb_assert (result != NULL);
|
||
return result;
|
||
}
|
||
|
||
/* A helper function to turn a rust_op representing a name into a full
|
||
name. This applies generic arguments as needed. The returned name
|
||
is allocated on the work obstack. */
|
||
|
||
static const char *
|
||
convert_name (struct parser_state *state, const struct rust_op *operation)
|
||
{
|
||
int i;
|
||
|
||
gdb_assert (operation->opcode == OP_VAR_VALUE);
|
||
|
||
if (operation->right.params == NULL)
|
||
return operation->left.sval.ptr;
|
||
|
||
std::vector<struct type *> types
|
||
(convert_params_to_types (state, operation->right.params));
|
||
|
||
obstack_grow_str (work_obstack, operation->left.sval.ptr);
|
||
obstack_1grow (work_obstack, '<');
|
||
for (i = 0; i < types.size (); ++i)
|
||
{
|
||
std::string type_name = type_to_string (types[i]);
|
||
|
||
if (i > 0)
|
||
obstack_1grow (work_obstack, ',');
|
||
|
||
obstack_grow_str (work_obstack, type_name.c_str ());
|
||
}
|
||
obstack_grow_str0 (work_obstack, ">");
|
||
|
||
return (const char *) obstack_finish (work_obstack);
|
||
}
|
||
|
||
static void convert_ast_to_expression (struct parser_state *state,
|
||
const struct rust_op *operation,
|
||
const struct rust_op *top,
|
||
bool want_type = false);
|
||
|
||
/* A helper function that converts a vec of rust_ops to a gdb
|
||
expression. */
|
||
|
||
static void
|
||
convert_params_to_expression (struct parser_state *state,
|
||
rust_op_vector *params,
|
||
const struct rust_op *top)
|
||
{
|
||
for (const rust_op *elem : *params)
|
||
convert_ast_to_expression (state, elem, top);
|
||
}
|
||
|
||
/* Lower a rust_op to a gdb expression. STATE is the parser state.
|
||
OPERATION is the operation to lower. TOP is a pointer to the
|
||
top-most operation; it is used to handle the special case where the
|
||
top-most expression is an identifier and can be optionally lowered
|
||
to OP_TYPE. WANT_TYPE is a flag indicating that, if the expression
|
||
is the name of a type, then emit an OP_TYPE for it (rather than
|
||
erroring). If WANT_TYPE is set, then the similar TOP handling is
|
||
not done. */
|
||
|
||
static void
|
||
convert_ast_to_expression (struct parser_state *state,
|
||
const struct rust_op *operation,
|
||
const struct rust_op *top,
|
||
bool want_type)
|
||
{
|
||
switch (operation->opcode)
|
||
{
|
||
case OP_LONG:
|
||
write_exp_elt_opcode (state, OP_LONG);
|
||
write_exp_elt_type (state, operation->left.typed_val_int.type);
|
||
write_exp_elt_longcst (state, operation->left.typed_val_int.val);
|
||
write_exp_elt_opcode (state, OP_LONG);
|
||
break;
|
||
|
||
case OP_DOUBLE:
|
||
write_exp_elt_opcode (state, OP_DOUBLE);
|
||
write_exp_elt_type (state, operation->left.typed_val_float.type);
|
||
write_exp_elt_dblcst (state, operation->left.typed_val_float.dval);
|
||
write_exp_elt_opcode (state, OP_DOUBLE);
|
||
break;
|
||
|
||
case STRUCTOP_STRUCT:
|
||
{
|
||
convert_ast_to_expression (state, operation->left.op, top);
|
||
|
||
if (operation->completing)
|
||
mark_struct_expression (state);
|
||
write_exp_elt_opcode (state, STRUCTOP_STRUCT);
|
||
write_exp_string (state, operation->right.sval);
|
||
write_exp_elt_opcode (state, STRUCTOP_STRUCT);
|
||
}
|
||
break;
|
||
|
||
case STRUCTOP_ANONYMOUS:
|
||
{
|
||
convert_ast_to_expression (state, operation->left.op, top);
|
||
|
||
write_exp_elt_opcode (state, STRUCTOP_ANONYMOUS);
|
||
write_exp_elt_longcst (state, operation->right.typed_val_int.val);
|
||
write_exp_elt_opcode (state, STRUCTOP_ANONYMOUS);
|
||
}
|
||
break;
|
||
|
||
case UNOP_SIZEOF:
|
||
convert_ast_to_expression (state, operation->left.op, top, true);
|
||
write_exp_elt_opcode (state, UNOP_SIZEOF);
|
||
break;
|
||
|
||
case UNOP_PLUS:
|
||
case UNOP_NEG:
|
||
case UNOP_COMPLEMENT:
|
||
case UNOP_IND:
|
||
case UNOP_ADDR:
|
||
convert_ast_to_expression (state, operation->left.op, top);
|
||
write_exp_elt_opcode (state, operation->opcode);
|
||
break;
|
||
|
||
case BINOP_SUBSCRIPT:
|
||
case BINOP_MUL:
|
||
case BINOP_REPEAT:
|
||
case BINOP_DIV:
|
||
case BINOP_REM:
|
||
case BINOP_LESS:
|
||
case BINOP_GTR:
|
||
case BINOP_BITWISE_AND:
|
||
case BINOP_BITWISE_IOR:
|
||
case BINOP_BITWISE_XOR:
|
||
case BINOP_ADD:
|
||
case BINOP_SUB:
|
||
case BINOP_LOGICAL_OR:
|
||
case BINOP_LOGICAL_AND:
|
||
case BINOP_EQUAL:
|
||
case BINOP_NOTEQUAL:
|
||
case BINOP_LEQ:
|
||
case BINOP_GEQ:
|
||
case BINOP_LSH:
|
||
case BINOP_RSH:
|
||
case BINOP_ASSIGN:
|
||
case OP_RUST_ARRAY:
|
||
convert_ast_to_expression (state, operation->left.op, top);
|
||
convert_ast_to_expression (state, operation->right.op, top);
|
||
if (operation->compound_assignment)
|
||
{
|
||
write_exp_elt_opcode (state, BINOP_ASSIGN_MODIFY);
|
||
write_exp_elt_opcode (state, operation->opcode);
|
||
write_exp_elt_opcode (state, BINOP_ASSIGN_MODIFY);
|
||
}
|
||
else
|
||
write_exp_elt_opcode (state, operation->opcode);
|
||
|
||
if (operation->compound_assignment
|
||
|| operation->opcode == BINOP_ASSIGN)
|
||
{
|
||
struct type *type;
|
||
|
||
type = language_lookup_primitive_type (parse_language (state),
|
||
parse_gdbarch (state),
|
||
"()");
|
||
|
||
write_exp_elt_opcode (state, OP_LONG);
|
||
write_exp_elt_type (state, type);
|
||
write_exp_elt_longcst (state, 0);
|
||
write_exp_elt_opcode (state, OP_LONG);
|
||
|
||
write_exp_elt_opcode (state, BINOP_COMMA);
|
||
}
|
||
break;
|
||
|
||
case UNOP_CAST:
|
||
{
|
||
struct type *type = convert_ast_to_type (state, operation->right.op);
|
||
|
||
convert_ast_to_expression (state, operation->left.op, top);
|
||
write_exp_elt_opcode (state, UNOP_CAST);
|
||
write_exp_elt_type (state, type);
|
||
write_exp_elt_opcode (state, UNOP_CAST);
|
||
}
|
||
break;
|
||
|
||
case OP_FUNCALL:
|
||
{
|
||
if (operation->left.op->opcode == OP_VAR_VALUE)
|
||
{
|
||
struct type *type;
|
||
const char *varname = convert_name (state, operation->left.op);
|
||
|
||
type = rust_lookup_type (varname, expression_context_block);
|
||
if (type != NULL)
|
||
{
|
||
/* This is actually a tuple struct expression, not a
|
||
call expression. */
|
||
rust_op_vector *params = operation->right.params;
|
||
|
||
if (TYPE_CODE (type) != TYPE_CODE_NAMESPACE)
|
||
{
|
||
if (!rust_tuple_struct_type_p (type))
|
||
error (_("Type %s is not a tuple struct"), varname);
|
||
|
||
for (int i = 0; i < params->size (); ++i)
|
||
{
|
||
char *cell = get_print_cell ();
|
||
|
||
xsnprintf (cell, PRINT_CELL_SIZE, "__%d", i);
|
||
write_exp_elt_opcode (state, OP_NAME);
|
||
write_exp_string (state, make_stoken (cell));
|
||
write_exp_elt_opcode (state, OP_NAME);
|
||
|
||
convert_ast_to_expression (state, (*params)[i], top);
|
||
}
|
||
|
||
write_exp_elt_opcode (state, OP_AGGREGATE);
|
||
write_exp_elt_type (state, type);
|
||
write_exp_elt_longcst (state, 2 * params->size ());
|
||
write_exp_elt_opcode (state, OP_AGGREGATE);
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
convert_ast_to_expression (state, operation->left.op, top);
|
||
convert_params_to_expression (state, operation->right.params, top);
|
||
write_exp_elt_opcode (state, OP_FUNCALL);
|
||
write_exp_elt_longcst (state, operation->right.params->size ());
|
||
write_exp_elt_longcst (state, OP_FUNCALL);
|
||
}
|
||
break;
|
||
|
||
case OP_ARRAY:
|
||
gdb_assert (operation->left.op == NULL);
|
||
convert_params_to_expression (state, operation->right.params, top);
|
||
write_exp_elt_opcode (state, OP_ARRAY);
|
||
write_exp_elt_longcst (state, 0);
|
||
write_exp_elt_longcst (state, operation->right.params->size () - 1);
|
||
write_exp_elt_longcst (state, OP_ARRAY);
|
||
break;
|
||
|
||
case OP_VAR_VALUE:
|
||
{
|
||
struct block_symbol sym;
|
||
const char *varname;
|
||
|
||
if (operation->left.sval.ptr[0] == '$')
|
||
{
|
||
write_dollar_variable (state, operation->left.sval);
|
||
break;
|
||
}
|
||
|
||
varname = convert_name (state, operation);
|
||
sym = rust_lookup_symbol (varname, expression_context_block,
|
||
VAR_DOMAIN);
|
||
if (sym.symbol != NULL && SYMBOL_CLASS (sym.symbol) != LOC_TYPEDEF)
|
||
{
|
||
write_exp_elt_opcode (state, OP_VAR_VALUE);
|
||
write_exp_elt_block (state, sym.block);
|
||
write_exp_elt_sym (state, sym.symbol);
|
||
write_exp_elt_opcode (state, OP_VAR_VALUE);
|
||
}
|
||
else
|
||
{
|
||
struct type *type = NULL;
|
||
|
||
if (sym.symbol != NULL)
|
||
{
|
||
gdb_assert (SYMBOL_CLASS (sym.symbol) == LOC_TYPEDEF);
|
||
type = SYMBOL_TYPE (sym.symbol);
|
||
}
|
||
if (type == NULL)
|
||
type = rust_lookup_type (varname, expression_context_block);
|
||
if (type == NULL)
|
||
error (_("No symbol '%s' in current context"), varname);
|
||
|
||
if (!want_type
|
||
&& TYPE_CODE (type) == TYPE_CODE_STRUCT
|
||
&& TYPE_NFIELDS (type) == 0)
|
||
{
|
||
/* A unit-like struct. */
|
||
write_exp_elt_opcode (state, OP_AGGREGATE);
|
||
write_exp_elt_type (state, type);
|
||
write_exp_elt_longcst (state, 0);
|
||
write_exp_elt_opcode (state, OP_AGGREGATE);
|
||
}
|
||
else if (want_type || operation == top)
|
||
{
|
||
write_exp_elt_opcode (state, OP_TYPE);
|
||
write_exp_elt_type (state, type);
|
||
write_exp_elt_opcode (state, OP_TYPE);
|
||
}
|
||
else
|
||
error (_("Found type '%s', which can't be "
|
||
"evaluated in this context"),
|
||
varname);
|
||
}
|
||
}
|
||
break;
|
||
|
||
case OP_AGGREGATE:
|
||
{
|
||
int i;
|
||
int length;
|
||
rust_set_vector *fields = operation->right.field_inits;
|
||
struct type *type;
|
||
const char *name;
|
||
|
||
length = 0;
|
||
for (const set_field &init : *fields)
|
||
{
|
||
if (init.name.ptr != NULL)
|
||
{
|
||
write_exp_elt_opcode (state, OP_NAME);
|
||
write_exp_string (state, init.name);
|
||
write_exp_elt_opcode (state, OP_NAME);
|
||
++length;
|
||
}
|
||
|
||
convert_ast_to_expression (state, init.init, top);
|
||
++length;
|
||
|
||
if (init.name.ptr == NULL)
|
||
{
|
||
/* This is handled differently from Ada in our
|
||
evaluator. */
|
||
write_exp_elt_opcode (state, OP_OTHERS);
|
||
}
|
||
}
|
||
|
||
name = convert_name (state, operation->left.op);
|
||
type = rust_lookup_type (name, expression_context_block);
|
||
if (type == NULL)
|
||
error (_("Could not find type '%s'"), operation->left.sval.ptr);
|
||
|
||
if (TYPE_CODE (type) != TYPE_CODE_STRUCT
|
||
|| rust_tuple_type_p (type)
|
||
|| rust_tuple_struct_type_p (type))
|
||
error (_("Struct expression applied to non-struct type"));
|
||
|
||
write_exp_elt_opcode (state, OP_AGGREGATE);
|
||
write_exp_elt_type (state, type);
|
||
write_exp_elt_longcst (state, length);
|
||
write_exp_elt_opcode (state, OP_AGGREGATE);
|
||
}
|
||
break;
|
||
|
||
case OP_STRING:
|
||
{
|
||
write_exp_elt_opcode (state, OP_STRING);
|
||
write_exp_string (state, operation->left.sval);
|
||
write_exp_elt_opcode (state, OP_STRING);
|
||
}
|
||
break;
|
||
|
||
case OP_RANGE:
|
||
{
|
||
enum range_type kind = BOTH_BOUND_DEFAULT;
|
||
|
||
if (operation->left.op != NULL)
|
||
{
|
||
convert_ast_to_expression (state, operation->left.op, top);
|
||
kind = HIGH_BOUND_DEFAULT;
|
||
}
|
||
if (operation->right.op != NULL)
|
||
{
|
||
convert_ast_to_expression (state, operation->right.op, top);
|
||
if (kind == BOTH_BOUND_DEFAULT)
|
||
kind = LOW_BOUND_DEFAULT;
|
||
else
|
||
{
|
||
gdb_assert (kind == HIGH_BOUND_DEFAULT);
|
||
kind = NONE_BOUND_DEFAULT;
|
||
}
|
||
}
|
||
write_exp_elt_opcode (state, OP_RANGE);
|
||
write_exp_elt_longcst (state, kind);
|
||
write_exp_elt_opcode (state, OP_RANGE);
|
||
}
|
||
break;
|
||
|
||
default:
|
||
gdb_assert_not_reached ("unhandled opcode in convert_ast_to_expression");
|
||
}
|
||
}
|
||
|
||
|
||
|
||
/* The parser as exposed to gdb. */
|
||
|
||
int
|
||
rust_parse (struct parser_state *state)
|
||
{
|
||
int result;
|
||
|
||
/* This sets various globals and also clears them on
|
||
destruction. */
|
||
rust_parser parser (state);
|
||
|
||
result = rustyyparse ();
|
||
|
||
if (!result || (parse_completion && parser.rust_ast != NULL))
|
||
convert_ast_to_expression (state, parser.rust_ast, parser.rust_ast);
|
||
|
||
return result;
|
||
}
|
||
|
||
/* The parser error handler. */
|
||
|
||
void
|
||
rustyyerror (const char *msg)
|
||
{
|
||
const char *where = prev_lexptr ? prev_lexptr : lexptr;
|
||
error (_("%s in expression, near `%s'."), (msg ? msg : "Error"), where);
|
||
}
|
||
|
||
|
||
|
||
#if GDB_SELF_TEST
|
||
|
||
/* Initialize the lexer for testing. */
|
||
|
||
static void
|
||
rust_lex_test_init (const char *input)
|
||
{
|
||
prev_lexptr = NULL;
|
||
lexptr = input;
|
||
paren_depth = 0;
|
||
}
|
||
|
||
/* A test helper that lexes a string, expecting a single token. It
|
||
returns the lexer data for this token. */
|
||
|
||
static RUSTSTYPE
|
||
rust_lex_test_one (const char *input, int expected)
|
||
{
|
||
int token;
|
||
RUSTSTYPE result;
|
||
|
||
rust_lex_test_init (input);
|
||
|
||
token = rustyylex ();
|
||
SELF_CHECK (token == expected);
|
||
result = rustyylval;
|
||
|
||
if (token)
|
||
{
|
||
token = rustyylex ();
|
||
SELF_CHECK (token == 0);
|
||
}
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Test that INPUT lexes as the integer VALUE. */
|
||
|
||
static void
|
||
rust_lex_int_test (const char *input, int value, int kind)
|
||
{
|
||
RUSTSTYPE result = rust_lex_test_one (input, kind);
|
||
SELF_CHECK (result.typed_val_int.val == value);
|
||
}
|
||
|
||
/* Test that INPUT throws an exception with text ERR. */
|
||
|
||
static void
|
||
rust_lex_exception_test (const char *input, const char *err)
|
||
{
|
||
TRY
|
||
{
|
||
/* The "kind" doesn't matter. */
|
||
rust_lex_test_one (input, DECIMAL_INTEGER);
|
||
SELF_CHECK (0);
|
||
}
|
||
CATCH (except, RETURN_MASK_ERROR)
|
||
{
|
||
SELF_CHECK (strcmp (except.message, err) == 0);
|
||
}
|
||
END_CATCH
|
||
}
|
||
|
||
/* Test that INPUT lexes as the identifier, string, or byte-string
|
||
VALUE. KIND holds the expected token kind. */
|
||
|
||
static void
|
||
rust_lex_stringish_test (const char *input, const char *value, int kind)
|
||
{
|
||
RUSTSTYPE result = rust_lex_test_one (input, kind);
|
||
SELF_CHECK (result.sval.length == strlen (value));
|
||
SELF_CHECK (strncmp (result.sval.ptr, value, result.sval.length) == 0);
|
||
}
|
||
|
||
/* Helper to test that a string parses as a given token sequence. */
|
||
|
||
static void
|
||
rust_lex_test_sequence (const char *input, int len, const int expected[])
|
||
{
|
||
int i;
|
||
|
||
lexptr = input;
|
||
paren_depth = 0;
|
||
|
||
for (i = 0; i < len; ++i)
|
||
{
|
||
int token = rustyylex ();
|
||
|
||
SELF_CHECK (token == expected[i]);
|
||
}
|
||
}
|
||
|
||
/* Tests for an integer-parsing corner case. */
|
||
|
||
static void
|
||
rust_lex_test_trailing_dot (void)
|
||
{
|
||
const int expected1[] = { DECIMAL_INTEGER, '.', IDENT, '(', ')', 0 };
|
||
const int expected2[] = { INTEGER, '.', IDENT, '(', ')', 0 };
|
||
const int expected3[] = { FLOAT, EQEQ, '(', ')', 0 };
|
||
const int expected4[] = { DECIMAL_INTEGER, DOTDOT, DECIMAL_INTEGER, 0 };
|
||
|
||
rust_lex_test_sequence ("23.g()", ARRAY_SIZE (expected1), expected1);
|
||
rust_lex_test_sequence ("23_0.g()", ARRAY_SIZE (expected2), expected2);
|
||
rust_lex_test_sequence ("23.==()", ARRAY_SIZE (expected3), expected3);
|
||
rust_lex_test_sequence ("23..25", ARRAY_SIZE (expected4), expected4);
|
||
}
|
||
|
||
/* Tests of completion. */
|
||
|
||
static void
|
||
rust_lex_test_completion (void)
|
||
{
|
||
const int expected[] = { IDENT, '.', COMPLETE, 0 };
|
||
|
||
parse_completion = 1;
|
||
|
||
rust_lex_test_sequence ("something.wha", ARRAY_SIZE (expected), expected);
|
||
rust_lex_test_sequence ("something.", ARRAY_SIZE (expected), expected);
|
||
|
||
parse_completion = 0;
|
||
}
|
||
|
||
/* Test pushback. */
|
||
|
||
static void
|
||
rust_lex_test_push_back (void)
|
||
{
|
||
int token;
|
||
|
||
rust_lex_test_init (">>=");
|
||
|
||
token = rustyylex ();
|
||
SELF_CHECK (token == COMPOUND_ASSIGN);
|
||
SELF_CHECK (rustyylval.opcode == BINOP_RSH);
|
||
|
||
rust_push_back ('=');
|
||
|
||
token = rustyylex ();
|
||
SELF_CHECK (token == '=');
|
||
|
||
token = rustyylex ();
|
||
SELF_CHECK (token == 0);
|
||
}
|
||
|
||
/* Unit test the lexer. */
|
||
|
||
static void
|
||
rust_lex_tests (void)
|
||
{
|
||
int i;
|
||
|
||
auto_obstack test_obstack;
|
||
scoped_restore obstack_holder = make_scoped_restore (&work_obstack,
|
||
&test_obstack);
|
||
|
||
unit_testing = 1;
|
||
|
||
rust_lex_test_one ("", 0);
|
||
rust_lex_test_one (" \t \n \r ", 0);
|
||
rust_lex_test_one ("thread 23", 0);
|
||
rust_lex_test_one ("task 23", 0);
|
||
rust_lex_test_one ("th 104", 0);
|
||
rust_lex_test_one ("ta 97", 0);
|
||
|
||
rust_lex_int_test ("'z'", 'z', INTEGER);
|
||
rust_lex_int_test ("'\\xff'", 0xff, INTEGER);
|
||
rust_lex_int_test ("'\\u{1016f}'", 0x1016f, INTEGER);
|
||
rust_lex_int_test ("b'z'", 'z', INTEGER);
|
||
rust_lex_int_test ("b'\\xfe'", 0xfe, INTEGER);
|
||
rust_lex_int_test ("b'\\xFE'", 0xfe, INTEGER);
|
||
rust_lex_int_test ("b'\\xfE'", 0xfe, INTEGER);
|
||
|
||
/* Test all escapes in both modes. */
|
||
rust_lex_int_test ("'\\n'", '\n', INTEGER);
|
||
rust_lex_int_test ("'\\r'", '\r', INTEGER);
|
||
rust_lex_int_test ("'\\t'", '\t', INTEGER);
|
||
rust_lex_int_test ("'\\\\'", '\\', INTEGER);
|
||
rust_lex_int_test ("'\\0'", '\0', INTEGER);
|
||
rust_lex_int_test ("'\\''", '\'', INTEGER);
|
||
rust_lex_int_test ("'\\\"'", '"', INTEGER);
|
||
|
||
rust_lex_int_test ("b'\\n'", '\n', INTEGER);
|
||
rust_lex_int_test ("b'\\r'", '\r', INTEGER);
|
||
rust_lex_int_test ("b'\\t'", '\t', INTEGER);
|
||
rust_lex_int_test ("b'\\\\'", '\\', INTEGER);
|
||
rust_lex_int_test ("b'\\0'", '\0', INTEGER);
|
||
rust_lex_int_test ("b'\\''", '\'', INTEGER);
|
||
rust_lex_int_test ("b'\\\"'", '"', INTEGER);
|
||
|
||
rust_lex_exception_test ("'z", "Unterminated character literal");
|
||
rust_lex_exception_test ("b'\\x0'", "Not enough hex digits seen");
|
||
rust_lex_exception_test ("b'\\u{0}'", "Unicode escape in byte literal");
|
||
rust_lex_exception_test ("'\\x0'", "Not enough hex digits seen");
|
||
rust_lex_exception_test ("'\\u0'", "Missing '{' in Unicode escape");
|
||
rust_lex_exception_test ("'\\u{0", "Missing '}' in Unicode escape");
|
||
rust_lex_exception_test ("'\\u{0000007}", "Overlong hex escape");
|
||
rust_lex_exception_test ("'\\u{}", "Not enough hex digits seen");
|
||
rust_lex_exception_test ("'\\Q'", "Invalid escape \\Q in literal");
|
||
rust_lex_exception_test ("b'\\Q'", "Invalid escape \\Q in literal");
|
||
|
||
rust_lex_int_test ("23", 23, DECIMAL_INTEGER);
|
||
rust_lex_int_test ("2_344__29", 234429, INTEGER);
|
||
rust_lex_int_test ("0x1f", 0x1f, INTEGER);
|
||
rust_lex_int_test ("23usize", 23, INTEGER);
|
||
rust_lex_int_test ("23i32", 23, INTEGER);
|
||
rust_lex_int_test ("0x1_f", 0x1f, INTEGER);
|
||
rust_lex_int_test ("0b1_101011__", 0x6b, INTEGER);
|
||
rust_lex_int_test ("0o001177i64", 639, INTEGER);
|
||
|
||
rust_lex_test_trailing_dot ();
|
||
|
||
rust_lex_test_one ("23.", FLOAT);
|
||
rust_lex_test_one ("23.99f32", FLOAT);
|
||
rust_lex_test_one ("23e7", FLOAT);
|
||
rust_lex_test_one ("23E-7", FLOAT);
|
||
rust_lex_test_one ("23e+7", FLOAT);
|
||
rust_lex_test_one ("23.99e+7f64", FLOAT);
|
||
rust_lex_test_one ("23.82f32", FLOAT);
|
||
|
||
rust_lex_stringish_test ("hibob", "hibob", IDENT);
|
||
rust_lex_stringish_test ("hibob__93", "hibob__93", IDENT);
|
||
rust_lex_stringish_test ("thread", "thread", IDENT);
|
||
|
||
rust_lex_stringish_test ("\"string\"", "string", STRING);
|
||
rust_lex_stringish_test ("\"str\\ting\"", "str\ting", STRING);
|
||
rust_lex_stringish_test ("\"str\\\"ing\"", "str\"ing", STRING);
|
||
rust_lex_stringish_test ("r\"str\\ing\"", "str\\ing", STRING);
|
||
rust_lex_stringish_test ("r#\"str\\ting\"#", "str\\ting", STRING);
|
||
rust_lex_stringish_test ("r###\"str\\\"ing\"###", "str\\\"ing", STRING);
|
||
|
||
rust_lex_stringish_test ("b\"string\"", "string", BYTESTRING);
|
||
rust_lex_stringish_test ("b\"\x73tring\"", "string", BYTESTRING);
|
||
rust_lex_stringish_test ("b\"str\\\"ing\"", "str\"ing", BYTESTRING);
|
||
rust_lex_stringish_test ("br####\"\\x73tring\"####", "\\x73tring",
|
||
BYTESTRING);
|
||
|
||
for (i = 0; i < ARRAY_SIZE (identifier_tokens); ++i)
|
||
rust_lex_test_one (identifier_tokens[i].name, identifier_tokens[i].value);
|
||
|
||
for (i = 0; i < ARRAY_SIZE (operator_tokens); ++i)
|
||
rust_lex_test_one (operator_tokens[i].name, operator_tokens[i].value);
|
||
|
||
rust_lex_test_completion ();
|
||
rust_lex_test_push_back ();
|
||
|
||
unit_testing = 0;
|
||
}
|
||
|
||
#endif /* GDB_SELF_TEST */
|
||
|
||
void
|
||
_initialize_rust_exp (void)
|
||
{
|
||
int code = regcomp (&number_regex, number_regex_text, REG_EXTENDED);
|
||
/* If the regular expression was incorrect, it was a programming
|
||
error. */
|
||
gdb_assert (code == 0);
|
||
|
||
#if GDB_SELF_TEST
|
||
selftests::register_test (rust_lex_tests);
|
||
#endif
|
||
}
|