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https://sourceware.org/git/binutils-gdb.git
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0874fd075b
This commit converts all languages to sub-classes of a language_defn
base class.
The motivation for this change is to make it easier to add new methods
onto languages without having to update all of the individual language
structures. In the future it might be possible to move more things,
like expression parsing, into the language class(es) for better
encapsulation, however I have no plans to tackle this in the short
term.
This commit sets up a strategy for transitioning from the current
language system, where each language is an instance of the
language_defn structure, to the class hierarchy system.
The plan is to rename the existing language_defn into language_data,
and make this a base class for the new language_defn class, something
like this:
struct language_data
{
... old language_defn fields here ...
};
struct language_defn : public language_data
{
language_defn (const language_data d)
: language_data (d)
{ .... }
};
Then each existing language, for example ada_language_defn can be
converted into an instance of language_data, and passed into the
constructor of a new language class, something like this:
language_data ada_language_data =
{
... old ada_language_defn values here ...
};
struct ada_language : public language_defn
{
ada_language (ada_language_data)
{ .... }
};
What this means is that immediately after the conversion nothing much
changes. Every language is now its own class, but all the old
language fields still exist and can be accessed in the same way.
In later commits I will convert function pointers from the old
language_defn structure into real class methods on language_defn, with
overrides on sub-classes where needed.
At this point I imagine that those fields of the old language_defn
structure that contained only data will probably remain as data fields
within the new language_data base structure, it is only the methods
that I plan to change initially.
I tweaked how we manage the list of languages a bit, each language is
now registered as it is created, and this resulted in a small number
of changes in language.c.
Most of the changes in the *-lang.c files are identical.
There should be no user visible changes after this commit.
gdb/ChangeLog:
* gdb/ada-lang.c (ada_language_defn): Convert to...
(ada_language_data): ...this.
(class ada_language): New class.
(ada_language_defn): New static global.
* gdb/c-lang.c (c_language_defn): Convert to...
(c_language_data): ...this.
(class c_language): New class.
(c_language_defn): New static global.
(cplus_language_defn): Convert to...
(cplus_language_data): ...this.
(class cplus_language): New class.
(cplus_language_defn): New static global.
(asm_language_defn): Convert to...
(asm_language_data): ...this.
(class asm_language): New class.
(asm_language_defn): New static global.
(minimal_language_defn): Convert to...
(minimal_language_data): ...this.
(class minimal_language): New class.
(minimal_language_defn): New static global.
* gdb/d-lang.c (d_language_defn): Convert to...
(d_language_data): ...this.
(class d_language): New class.
(d_language_defn): New static global.
* gdb/f-lang.c (f_language_defn): Convert to...
(f_language_data): ...this.
(class f_language): New class.
(f_language_defn): New static global.
* gdb/go-lang.c (go_language_defn): Convert to...
(go_language_data): ...this.
(class go_language): New class.
(go_language_defn): New static global.
* gdb/language.c (unknown_language_defn): Remove declaration.
(current_language): Initialize to nullptr, real initialization is
moved to _initialize_language.
(languages): Delete global.
(language_defn::languages): Define.
(set_language_command): Use language_defn::languages.
(set_language): Likewise.
(range_error): Likewise.
(language_enum): Likewise.
(language_def): Likewise.
(add_set_language_command): Use language_def::languages for the
language list, and language_def to lookup language pointers.
(skip_language_trampoline): Use language_defn::languages.
(unknown_language_defn): Convert to...
(unknown_language_data): ...this.
(class unknown_language): New class.
(unknown_language_defn): New static global.
(auto_language_defn): Convert to...
(auto_language_data): ...this.
(class auto_language): New class.
(auto_language_defn): New static global.
(language_gdbarch_post_init): Use language_defn::languages.
(_initialize_language): Initialize current_language.
* gdb/language.h (struct language_defn): Rename to...
(struct language_data): ...this.
(struct language_defn): New.
(auto_language_defn): Delete.
(unknown_language_defn): Delete.
(minimal_language_defn): Delete.
(ada_language_defn): Delete.
(asm_language_defn): Delete.
(c_language_defn): Delete.
(cplus_language_defn): Delete.
(d_language_defn): Delete.
(f_language_defn): Delete.
(go_language_defn): Delete.
(m2_language_defn): Delete.
(objc_language_defn): Delete.
(opencl_language_defn): Delete.
(pascal_language_defn): Delete.
(rust_language_defn): Delete.
* gdb/m2-lang.c (m2_language_defn): Convert to...
(m2_language_data): ...this.
(class m2_language): New class.
(m2_language_defn): New static global.
* gdb/objc-lang.c (objc_language_defn): Convert to...
(objc_language_data): ...this.
(class objc_language): New class.
(objc_language_defn): New static global.
* gdb/opencl-lang.c (opencl_language_defn): Convert to...
(opencl_language_data): ...this.
(class opencl_language): New class.
(opencl_language_defn): New static global.
* gdb/p-lang.c (pascal_language_defn): Convert to...
(pascal_language_data): ...this.
(class pascal_language): New class.
(pascal_language_defn): New static global.
* gdb/rust-exp.y (rust_lex_tests): Use language_def to find
language pointer, update comment format.
* gdb/rust-lang.c (rust_language_defn): Convert to...
(rust_language_data): ...this.
(class rust_language): New class.
(rust_language_defn): New static global.
2842 lines
72 KiB
Plaintext
2842 lines
72 KiB
Plaintext
/* Bison parser for Rust expressions, for GDB.
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Copyright (C) 2016-2020 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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/* The Bison manual says that %pure-parser is deprecated, but we use
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it anyway because it also works with Byacc. That is also why
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this uses %lex-param and %parse-param rather than the simpler
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%param -- Byacc does not support the latter. */
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%pure-parser
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%lex-param {struct rust_parser *parser}
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%parse-param {struct rust_parser *parser}
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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 "gdbsupport/selftest.h"
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#include "value.h"
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#include "gdbarch.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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gdb_byte val[16];
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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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%}
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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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struct rust_parser;
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static int rustyylex (YYSTYPE *, rust_parser *);
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static void rustyyerror (rust_parser *parser, const char *msg);
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static struct stoken make_stoken (const char *);
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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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|
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/* The compiled number-matching regex. */
|
||
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static regex_t number_regex;
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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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}
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~rust_parser ()
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{
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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 pstate->language ();
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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 pstate->gdbarch ();
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}
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/* A helper to look up a Rust type, or fail. This only works for
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types defined by rust_language_arch_info. */
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struct type *get_type (const char *name)
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{
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struct type *type;
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type = language_lookup_primitive_type (language (), arch (), name);
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if (type == NULL)
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error (_("Could not find Rust type %s"), name);
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return type;
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}
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const char *copy_name (const char *name, int len);
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struct stoken concat3 (const char *s1, const char *s2, const char *s3);
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const struct rust_op *crate_name (const struct rust_op *name);
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const struct rust_op *super_name (const struct rust_op *ident,
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unsigned int n_supers);
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int lex_character (YYSTYPE *lvalp);
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int lex_number (YYSTYPE *lvalp);
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int lex_string (YYSTYPE *lvalp);
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int lex_identifier (YYSTYPE *lvalp);
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uint32_t lex_hex (int min, int max);
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uint32_t lex_escape (int is_byte);
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int lex_operator (YYSTYPE *lvalp);
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void push_back (char c);
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void update_innermost_block (struct block_symbol sym);
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struct block_symbol 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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struct type *rust_lookup_type (const char *name, const struct block *block);
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std::vector<struct type *> convert_params_to_types (rust_op_vector *params);
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struct type *convert_ast_to_type (const struct rust_op *operation);
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const char *convert_name (const struct rust_op *operation);
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void convert_params_to_expression (rust_op_vector *params,
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const struct rust_op *top);
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void convert_ast_to_expression (const struct rust_op *operation,
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const struct rust_op *top,
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bool want_type = false);
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struct rust_op *ast_basic_type (enum type_code typecode);
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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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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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const struct rust_op *ast_literal (struct typed_val_int val);
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const struct rust_op *ast_dliteral (struct typed_val_float val);
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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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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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const struct rust_op *ast_unary (enum exp_opcode opcode,
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const struct rust_op *expr);
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const struct rust_op *ast_cast (const struct rust_op *expr,
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const struct rust_op *type);
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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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const struct rust_op *ast_path (struct stoken name,
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rust_op_vector *params);
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const struct rust_op *ast_string (struct stoken str);
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const struct rust_op *ast_struct (const struct rust_op *name,
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rust_set_vector *fields);
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const struct rust_op *ast_range (const struct rust_op *lhs,
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const struct rust_op *rhs,
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bool inclusive);
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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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const struct rust_op *ast_slice_type (const struct rust_op *type);
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const struct rust_op *ast_reference_type (const struct rust_op *type);
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const struct rust_op *ast_pointer_type (const struct rust_op *type,
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int is_mut);
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const struct rust_op *ast_function_type (const struct rust_op *result,
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rust_op_vector *params);
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const struct rust_op *ast_tuple_type (rust_op_vector *params);
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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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|
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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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/* Depth of parentheses. */
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int paren_depth = 0;
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};
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/* Rust AST operations. We build a tree of these; then lower them to
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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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/* For OP_RANGE, indicates whether the range is inclusive or
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exclusive. */
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unsigned int inclusive : 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> DOTDOTEQ
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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
|
||
%type <op> expr
|
||
%type <op> field_expr
|
||
%type <op> idx_expr
|
||
%type <op> unop_expr
|
||
%type <op> binop_expr
|
||
%type <op> binop_expr_expr
|
||
%type <op> type_cast_expr
|
||
%type <op> assignment_expr
|
||
%type <op> compound_assignment_expr
|
||
%type <op> paren_expr
|
||
%type <op> call_expr
|
||
%type <op> path_expr
|
||
%type <op> tuple_expr
|
||
%type <op> unit_expr
|
||
%type <op> struct_expr
|
||
%type <op> array_expr
|
||
%type <op> range_expr
|
||
|
||
%type <params> expr_list
|
||
%type <params> maybe_expr_list
|
||
%type <params> paren_expr_list
|
||
|
||
%type <field_inits> struct_expr_list
|
||
%type <one_field_init> struct_expr_tail
|
||
|
||
/* Precedence. */
|
||
%nonassoc DOTDOT DOTDOTEQ
|
||
%right '=' COMPOUND_ASSIGN
|
||
%left OROR
|
||
%left ANDAND
|
||
%nonassoc EQEQ NOTEQ '<' '>' LTEQ GTEQ
|
||
%left '|'
|
||
%left '^'
|
||
%left '&'
|
||
%left LSH RSH
|
||
%left '@'
|
||
%left '+' '-'
|
||
%left '*' '/' '%'
|
||
/* These could be %precedence in Bison, but that isn't a yacc
|
||
feature. */
|
||
%left KW_AS
|
||
%left UNARY
|
||
%left '[' '.' '('
|
||
|
||
%%
|
||
|
||
start:
|
||
expr
|
||
{
|
||
/* If we are completing and see a valid parse,
|
||
rust_ast will already have been set. */
|
||
if (parser->rust_ast == NULL)
|
||
parser->rust_ast = $1;
|
||
}
|
||
;
|
||
|
||
/* Note that the Rust grammar includes a method_call_expr, but we
|
||
handle this differently, to avoid a shift/reduce conflict with
|
||
call_expr. */
|
||
expr:
|
||
literal
|
||
| path_expr
|
||
| tuple_expr
|
||
| unit_expr
|
||
| struct_expr
|
||
| field_expr
|
||
| array_expr
|
||
| idx_expr
|
||
| range_expr
|
||
| unop_expr /* Must precede call_expr because of ambiguity with
|
||
sizeof. */
|
||
| binop_expr
|
||
| paren_expr
|
||
| call_expr
|
||
;
|
||
|
||
tuple_expr:
|
||
'(' expr ',' maybe_expr_list ')'
|
||
{
|
||
$4->push_back ($2);
|
||
error (_("Tuple expressions not supported yet"));
|
||
}
|
||
;
|
||
|
||
unit_expr:
|
||
'(' ')'
|
||
{
|
||
struct typed_val_int val;
|
||
|
||
val.type
|
||
= (language_lookup_primitive_type
|
||
(parser->language (), parser->arch (),
|
||
"()"));
|
||
val.val = 0;
|
||
$$ = parser->ast_literal (val);
|
||
}
|
||
;
|
||
|
||
/* To avoid a shift/reduce conflict with call_expr, we don't handle
|
||
tuple struct expressions here, but instead when examining the
|
||
AST. */
|
||
struct_expr:
|
||
path_for_expr '{' struct_expr_list '}'
|
||
{ $$ = parser->ast_struct ($1, $3); }
|
||
;
|
||
|
||
struct_expr_tail:
|
||
DOTDOT expr
|
||
{
|
||
struct set_field sf;
|
||
|
||
sf.name.ptr = NULL;
|
||
sf.name.length = 0;
|
||
sf.init = $2;
|
||
|
||
$$ = sf;
|
||
}
|
||
| IDENT ':' expr
|
||
{
|
||
struct set_field sf;
|
||
|
||
sf.name = $1;
|
||
sf.init = $3;
|
||
$$ = sf;
|
||
}
|
||
| IDENT
|
||
{
|
||
struct set_field sf;
|
||
|
||
sf.name = $1;
|
||
sf.init = parser->ast_path ($1, NULL);
|
||
$$ = sf;
|
||
}
|
||
;
|
||
|
||
struct_expr_list:
|
||
/* %empty */
|
||
{
|
||
$$ = parser->new_set_vector ();
|
||
}
|
||
| struct_expr_tail
|
||
{
|
||
rust_set_vector *result = parser->new_set_vector ();
|
||
result->push_back ($1);
|
||
$$ = result;
|
||
}
|
||
| IDENT ':' expr ',' struct_expr_list
|
||
{
|
||
struct set_field sf;
|
||
|
||
sf.name = $1;
|
||
sf.init = $3;
|
||
$5->push_back (sf);
|
||
$$ = $5;
|
||
}
|
||
| IDENT ',' struct_expr_list
|
||
{
|
||
struct set_field sf;
|
||
|
||
sf.name = $1;
|
||
sf.init = parser->ast_path ($1, NULL);
|
||
$3->push_back (sf);
|
||
$$ = $3;
|
||
}
|
||
;
|
||
|
||
array_expr:
|
||
'[' KW_MUT expr_list ']'
|
||
{ $$ = parser->ast_call_ish (OP_ARRAY, NULL, $3); }
|
||
| '[' expr_list ']'
|
||
{ $$ = parser->ast_call_ish (OP_ARRAY, NULL, $2); }
|
||
| '[' KW_MUT expr ';' expr ']'
|
||
{ $$ = parser->ast_operation (OP_RUST_ARRAY, $3, $5); }
|
||
| '[' expr ';' expr ']'
|
||
{ $$ = parser->ast_operation (OP_RUST_ARRAY, $2, $4); }
|
||
;
|
||
|
||
range_expr:
|
||
expr DOTDOT
|
||
{ $$ = parser->ast_range ($1, NULL, false); }
|
||
| expr DOTDOT expr
|
||
{ $$ = parser->ast_range ($1, $3, false); }
|
||
| expr DOTDOTEQ expr
|
||
{ $$ = parser->ast_range ($1, $3, true); }
|
||
| DOTDOT expr
|
||
{ $$ = parser->ast_range (NULL, $2, false); }
|
||
| DOTDOTEQ expr
|
||
{ $$ = parser->ast_range (NULL, $2, true); }
|
||
| DOTDOT
|
||
{ $$ = parser->ast_range (NULL, NULL, false); }
|
||
;
|
||
|
||
literal:
|
||
INTEGER
|
||
{ $$ = parser->ast_literal ($1); }
|
||
| DECIMAL_INTEGER
|
||
{ $$ = parser->ast_literal ($1); }
|
||
| FLOAT
|
||
{ $$ = parser->ast_dliteral ($1); }
|
||
| STRING
|
||
{
|
||
struct set_field field;
|
||
struct typed_val_int val;
|
||
struct stoken token;
|
||
|
||
rust_set_vector *fields = parser->new_set_vector ();
|
||
|
||
/* Wrap the raw string in the &str struct. */
|
||
field.name.ptr = "data_ptr";
|
||
field.name.length = strlen (field.name.ptr);
|
||
field.init = parser->ast_unary (UNOP_ADDR,
|
||
parser->ast_string ($1));
|
||
fields->push_back (field);
|
||
|
||
val.type = parser->get_type ("usize");
|
||
val.val = $1.length;
|
||
|
||
field.name.ptr = "length";
|
||
field.name.length = strlen (field.name.ptr);
|
||
field.init = parser->ast_literal (val);
|
||
fields->push_back (field);
|
||
|
||
token.ptr = "&str";
|
||
token.length = strlen (token.ptr);
|
||
$$ = parser->ast_struct (parser->ast_path (token, NULL),
|
||
fields);
|
||
}
|
||
| BYTESTRING
|
||
{ $$ = parser->ast_string ($1); }
|
||
| KW_TRUE
|
||
{
|
||
struct typed_val_int val;
|
||
|
||
val.type = language_bool_type (parser->language (),
|
||
parser->arch ());
|
||
val.val = 1;
|
||
$$ = parser->ast_literal (val);
|
||
}
|
||
| KW_FALSE
|
||
{
|
||
struct typed_val_int val;
|
||
|
||
val.type = language_bool_type (parser->language (),
|
||
parser->arch ());
|
||
val.val = 0;
|
||
$$ = parser->ast_literal (val);
|
||
}
|
||
;
|
||
|
||
field_expr:
|
||
expr '.' IDENT
|
||
{ $$ = parser->ast_structop ($1, $3.ptr, 0); }
|
||
| expr '.' COMPLETE
|
||
{
|
||
$$ = parser->ast_structop ($1, $3.ptr, 1);
|
||
parser->rust_ast = $$;
|
||
}
|
||
| expr '.' DECIMAL_INTEGER
|
||
{ $$ = parser->ast_structop_anonymous ($1, $3); }
|
||
;
|
||
|
||
idx_expr:
|
||
expr '[' expr ']'
|
||
{ $$ = parser->ast_operation (BINOP_SUBSCRIPT, $1, $3); }
|
||
;
|
||
|
||
unop_expr:
|
||
'+' expr %prec UNARY
|
||
{ $$ = parser->ast_unary (UNOP_PLUS, $2); }
|
||
|
||
| '-' expr %prec UNARY
|
||
{ $$ = parser->ast_unary (UNOP_NEG, $2); }
|
||
|
||
| '!' expr %prec UNARY
|
||
{
|
||
/* Note that we provide a Rust-specific evaluator
|
||
override for UNOP_COMPLEMENT, so it can do the
|
||
right thing for both bool and integral
|
||
values. */
|
||
$$ = parser->ast_unary (UNOP_COMPLEMENT, $2);
|
||
}
|
||
|
||
| '*' expr %prec UNARY
|
||
{ $$ = parser->ast_unary (UNOP_IND, $2); }
|
||
|
||
| '&' expr %prec UNARY
|
||
{ $$ = parser->ast_unary (UNOP_ADDR, $2); }
|
||
|
||
| '&' KW_MUT expr %prec UNARY
|
||
{ $$ = parser->ast_unary (UNOP_ADDR, $3); }
|
||
| KW_SIZEOF '(' expr ')' %prec UNARY
|
||
{ $$ = parser->ast_unary (UNOP_SIZEOF, $3); }
|
||
;
|
||
|
||
binop_expr:
|
||
binop_expr_expr
|
||
| type_cast_expr
|
||
| assignment_expr
|
||
| compound_assignment_expr
|
||
;
|
||
|
||
binop_expr_expr:
|
||
expr '*' expr
|
||
{ $$ = parser->ast_operation (BINOP_MUL, $1, $3); }
|
||
|
||
| expr '@' expr
|
||
{ $$ = parser->ast_operation (BINOP_REPEAT, $1, $3); }
|
||
|
||
| expr '/' expr
|
||
{ $$ = parser->ast_operation (BINOP_DIV, $1, $3); }
|
||
|
||
| expr '%' expr
|
||
{ $$ = parser->ast_operation (BINOP_REM, $1, $3); }
|
||
|
||
| expr '<' expr
|
||
{ $$ = parser->ast_operation (BINOP_LESS, $1, $3); }
|
||
|
||
| expr '>' expr
|
||
{ $$ = parser->ast_operation (BINOP_GTR, $1, $3); }
|
||
|
||
| expr '&' expr
|
||
{ $$ = parser->ast_operation (BINOP_BITWISE_AND, $1, $3); }
|
||
|
||
| expr '|' expr
|
||
{ $$ = parser->ast_operation (BINOP_BITWISE_IOR, $1, $3); }
|
||
|
||
| expr '^' expr
|
||
{ $$ = parser->ast_operation (BINOP_BITWISE_XOR, $1, $3); }
|
||
|
||
| expr '+' expr
|
||
{ $$ = parser->ast_operation (BINOP_ADD, $1, $3); }
|
||
|
||
| expr '-' expr
|
||
{ $$ = parser->ast_operation (BINOP_SUB, $1, $3); }
|
||
|
||
| expr OROR expr
|
||
{ $$ = parser->ast_operation (BINOP_LOGICAL_OR, $1, $3); }
|
||
|
||
| expr ANDAND expr
|
||
{ $$ = parser->ast_operation (BINOP_LOGICAL_AND, $1, $3); }
|
||
|
||
| expr EQEQ expr
|
||
{ $$ = parser->ast_operation (BINOP_EQUAL, $1, $3); }
|
||
|
||
| expr NOTEQ expr
|
||
{ $$ = parser->ast_operation (BINOP_NOTEQUAL, $1, $3); }
|
||
|
||
| expr LTEQ expr
|
||
{ $$ = parser->ast_operation (BINOP_LEQ, $1, $3); }
|
||
|
||
| expr GTEQ expr
|
||
{ $$ = parser->ast_operation (BINOP_GEQ, $1, $3); }
|
||
|
||
| expr LSH expr
|
||
{ $$ = parser->ast_operation (BINOP_LSH, $1, $3); }
|
||
|
||
| expr RSH expr
|
||
{ $$ = parser->ast_operation (BINOP_RSH, $1, $3); }
|
||
;
|
||
|
||
type_cast_expr:
|
||
expr KW_AS type
|
||
{ $$ = parser->ast_cast ($1, $3); }
|
||
;
|
||
|
||
assignment_expr:
|
||
expr '=' expr
|
||
{ $$ = parser->ast_operation (BINOP_ASSIGN, $1, $3); }
|
||
;
|
||
|
||
compound_assignment_expr:
|
||
expr COMPOUND_ASSIGN expr
|
||
{ $$ = parser->ast_compound_assignment ($2, $1, $3); }
|
||
|
||
;
|
||
|
||
paren_expr:
|
||
'(' expr ')'
|
||
{ $$ = $2; }
|
||
;
|
||
|
||
expr_list:
|
||
expr
|
||
{
|
||
$$ = parser->new_op_vector ();
|
||
$$->push_back ($1);
|
||
}
|
||
| expr_list ',' expr
|
||
{
|
||
$1->push_back ($3);
|
||
$$ = $1;
|
||
}
|
||
;
|
||
|
||
maybe_expr_list:
|
||
/* %empty */
|
||
{
|
||
/* The result can't be NULL. */
|
||
$$ = parser->new_op_vector ();
|
||
}
|
||
| expr_list
|
||
{ $$ = $1; }
|
||
;
|
||
|
||
paren_expr_list:
|
||
'(' maybe_expr_list ')'
|
||
{ $$ = $2; }
|
||
;
|
||
|
||
call_expr:
|
||
expr paren_expr_list
|
||
{ $$ = parser->ast_call_ish (OP_FUNCALL, $1, $2); }
|
||
;
|
||
|
||
maybe_self_path:
|
||
/* %empty */
|
||
| KW_SELF COLONCOLON
|
||
;
|
||
|
||
super_path:
|
||
KW_SUPER COLONCOLON
|
||
{ $$ = 1; }
|
||
| super_path KW_SUPER COLONCOLON
|
||
{ $$ = $1 + 1; }
|
||
;
|
||
|
||
path_expr:
|
||
path_for_expr
|
||
{ $$ = $1; }
|
||
| GDBVAR
|
||
{ $$ = parser->ast_path ($1, NULL); }
|
||
| KW_SELF
|
||
{ $$ = parser->ast_path (make_stoken ("self"), NULL); }
|
||
;
|
||
|
||
path_for_expr:
|
||
identifier_path_for_expr
|
||
| KW_SELF COLONCOLON identifier_path_for_expr
|
||
{ $$ = parser->super_name ($3, 0); }
|
||
| maybe_self_path super_path identifier_path_for_expr
|
||
{ $$ = parser->super_name ($3, $2); }
|
||
| COLONCOLON identifier_path_for_expr
|
||
{ $$ = parser->crate_name ($2); }
|
||
| KW_EXTERN identifier_path_for_expr
|
||
{
|
||
/* This is a gdb extension to make it possible to
|
||
refer to items in other crates. It just bypasses
|
||
adding the current crate to the front of the
|
||
name. */
|
||
$$ = parser->ast_path (parser->concat3 ("::",
|
||
$2->left.sval.ptr,
|
||
NULL),
|
||
$2->right.params);
|
||
}
|
||
;
|
||
|
||
identifier_path_for_expr:
|
||
IDENT
|
||
{ $$ = parser->ast_path ($1, NULL); }
|
||
| identifier_path_for_expr COLONCOLON IDENT
|
||
{
|
||
$$ = parser->ast_path (parser->concat3 ($1->left.sval.ptr,
|
||
"::", $3.ptr),
|
||
NULL);
|
||
}
|
||
| identifier_path_for_expr COLONCOLON '<' type_list '>'
|
||
{ $$ = parser->ast_path ($1->left.sval, $4); }
|
||
| identifier_path_for_expr COLONCOLON '<' type_list RSH
|
||
{
|
||
$$ = parser->ast_path ($1->left.sval, $4);
|
||
parser->push_back ('>');
|
||
}
|
||
;
|
||
|
||
path_for_type:
|
||
identifier_path_for_type
|
||
| KW_SELF COLONCOLON identifier_path_for_type
|
||
{ $$ = parser->super_name ($3, 0); }
|
||
| maybe_self_path super_path identifier_path_for_type
|
||
{ $$ = parser->super_name ($3, $2); }
|
||
| COLONCOLON identifier_path_for_type
|
||
{ $$ = parser->crate_name ($2); }
|
||
| KW_EXTERN identifier_path_for_type
|
||
{
|
||
/* This is a gdb extension to make it possible to
|
||
refer to items in other crates. It just bypasses
|
||
adding the current crate to the front of the
|
||
name. */
|
||
$$ = parser->ast_path (parser->concat3 ("::",
|
||
$2->left.sval.ptr,
|
||
NULL),
|
||
$2->right.params);
|
||
}
|
||
;
|
||
|
||
just_identifiers_for_type:
|
||
IDENT
|
||
{ $$ = parser->ast_path ($1, NULL); }
|
||
| just_identifiers_for_type COLONCOLON IDENT
|
||
{
|
||
$$ = parser->ast_path (parser->concat3 ($1->left.sval.ptr,
|
||
"::", $3.ptr),
|
||
NULL);
|
||
}
|
||
;
|
||
|
||
identifier_path_for_type:
|
||
just_identifiers_for_type
|
||
| just_identifiers_for_type '<' type_list '>'
|
||
{ $$ = parser->ast_path ($1->left.sval, $3); }
|
||
| just_identifiers_for_type '<' type_list RSH
|
||
{
|
||
$$ = parser->ast_path ($1->left.sval, $3);
|
||
parser->push_back ('>');
|
||
}
|
||
;
|
||
|
||
type:
|
||
path_for_type
|
||
| '[' type ';' INTEGER ']'
|
||
{ $$ = parser->ast_array_type ($2, $4); }
|
||
| '[' type ';' DECIMAL_INTEGER ']'
|
||
{ $$ = parser->ast_array_type ($2, $4); }
|
||
| '&' '[' type ']'
|
||
{ $$ = parser->ast_slice_type ($3); }
|
||
| '&' type
|
||
{ $$ = parser->ast_reference_type ($2); }
|
||
| '*' KW_MUT type
|
||
{ $$ = parser->ast_pointer_type ($3, 1); }
|
||
| '*' KW_CONST type
|
||
{ $$ = parser->ast_pointer_type ($3, 0); }
|
||
| KW_FN '(' maybe_type_list ')' ARROW type
|
||
{ $$ = parser->ast_function_type ($6, $3); }
|
||
| '(' maybe_type_list ')'
|
||
{ $$ = parser->ast_tuple_type ($2); }
|
||
;
|
||
|
||
maybe_type_list:
|
||
/* %empty */
|
||
{ $$ = NULL; }
|
||
| type_list
|
||
{ $$ = $1; }
|
||
;
|
||
|
||
type_list:
|
||
type
|
||
{
|
||
rust_op_vector *result = parser->new_op_vector ();
|
||
result->push_back ($1);
|
||
$$ = result;
|
||
}
|
||
| type_list ',' type
|
||
{
|
||
$1->push_back ($3);
|
||
$$ = $1;
|
||
}
|
||
;
|
||
|
||
%%
|
||
|
||
/* A struct of this type is used to describe a token. */
|
||
|
||
struct token_info
|
||
{
|
||
const char *name;
|
||
int value;
|
||
enum exp_opcode opcode;
|
||
};
|
||
|
||
/* Identifier tokens. */
|
||
|
||
static const struct token_info identifier_tokens[] =
|
||
{
|
||
{ "as", KW_AS, OP_NULL },
|
||
{ "false", KW_FALSE, OP_NULL },
|
||
{ "if", 0, OP_NULL },
|
||
{ "mut", KW_MUT, OP_NULL },
|
||
{ "const", KW_CONST, OP_NULL },
|
||
{ "self", KW_SELF, OP_NULL },
|
||
{ "super", KW_SUPER, OP_NULL },
|
||
{ "true", KW_TRUE, OP_NULL },
|
||
{ "extern", KW_EXTERN, OP_NULL },
|
||
{ "fn", KW_FN, OP_NULL },
|
||
{ "sizeof", KW_SIZEOF, OP_NULL },
|
||
};
|
||
|
||
/* Operator tokens, sorted longest first. */
|
||
|
||
static const struct token_info operator_tokens[] =
|
||
{
|
||
{ ">>=", COMPOUND_ASSIGN, BINOP_RSH },
|
||
{ "<<=", COMPOUND_ASSIGN, BINOP_LSH },
|
||
|
||
{ "<<", LSH, OP_NULL },
|
||
{ ">>", RSH, OP_NULL },
|
||
{ "&&", ANDAND, OP_NULL },
|
||
{ "||", OROR, OP_NULL },
|
||
{ "==", EQEQ, OP_NULL },
|
||
{ "!=", NOTEQ, OP_NULL },
|
||
{ "<=", LTEQ, OP_NULL },
|
||
{ ">=", GTEQ, OP_NULL },
|
||
{ "+=", COMPOUND_ASSIGN, BINOP_ADD },
|
||
{ "-=", COMPOUND_ASSIGN, BINOP_SUB },
|
||
{ "*=", COMPOUND_ASSIGN, BINOP_MUL },
|
||
{ "/=", COMPOUND_ASSIGN, BINOP_DIV },
|
||
{ "%=", COMPOUND_ASSIGN, BINOP_REM },
|
||
{ "&=", COMPOUND_ASSIGN, BINOP_BITWISE_AND },
|
||
{ "|=", COMPOUND_ASSIGN, BINOP_BITWISE_IOR },
|
||
{ "^=", COMPOUND_ASSIGN, BINOP_BITWISE_XOR },
|
||
{ "..=", DOTDOTEQ, OP_NULL },
|
||
|
||
{ "::", COLONCOLON, OP_NULL },
|
||
{ "..", DOTDOT, OP_NULL },
|
||
{ "->", ARROW, OP_NULL }
|
||
};
|
||
|
||
/* Helper function to copy to the name obstack. */
|
||
|
||
const char *
|
||
rust_parser::copy_name (const char *name, int len)
|
||
{
|
||
return obstack_strndup (&obstack, name, len);
|
||
}
|
||
|
||
/* Helper function to make an stoken from a C string. */
|
||
|
||
static struct stoken
|
||
make_stoken (const char *p)
|
||
{
|
||
struct stoken result;
|
||
|
||
result.ptr = p;
|
||
result.length = strlen (result.ptr);
|
||
return result;
|
||
}
|
||
|
||
/* Helper function to concatenate three strings on the name
|
||
obstack. */
|
||
|
||
struct stoken
|
||
rust_parser::concat3 (const char *s1, const char *s2, const char *s3)
|
||
{
|
||
return make_stoken (obconcat (&obstack, s1, s2, s3, (char *) NULL));
|
||
}
|
||
|
||
/* Return an AST node referring to NAME, but relative to the crate's
|
||
name. */
|
||
|
||
const struct rust_op *
|
||
rust_parser::crate_name (const struct rust_op *name)
|
||
{
|
||
std::string crate = rust_crate_for_block (pstate->expression_context_block);
|
||
struct stoken result;
|
||
|
||
gdb_assert (name->opcode == OP_VAR_VALUE);
|
||
|
||
if (crate.empty ())
|
||
error (_("Could not find crate for current location"));
|
||
result = make_stoken (obconcat (&obstack, "::", crate.c_str (), "::",
|
||
name->left.sval.ptr, (char *) NULL));
|
||
|
||
return ast_path (result, name->right.params);
|
||
}
|
||
|
||
/* Create an AST node referring to a "super::" qualified name. IDENT
|
||
is the base name and N_SUPERS is how many "super::"s were
|
||
provided. N_SUPERS can be zero. */
|
||
|
||
const struct rust_op *
|
||
rust_parser::super_name (const struct rust_op *ident, unsigned int n_supers)
|
||
{
|
||
const char *scope = block_scope (pstate->expression_context_block);
|
||
int offset;
|
||
|
||
gdb_assert (ident->opcode == OP_VAR_VALUE);
|
||
|
||
if (scope[0] == '\0')
|
||
error (_("Couldn't find namespace scope for self::"));
|
||
|
||
if (n_supers > 0)
|
||
{
|
||
int len;
|
||
std::vector<int> offsets;
|
||
unsigned int current_len;
|
||
|
||
current_len = cp_find_first_component (scope);
|
||
while (scope[current_len] != '\0')
|
||
{
|
||
offsets.push_back (current_len);
|
||
gdb_assert (scope[current_len] == ':');
|
||
/* The "::". */
|
||
current_len += 2;
|
||
current_len += cp_find_first_component (scope
|
||
+ current_len);
|
||
}
|
||
|
||
len = offsets.size ();
|
||
if (n_supers >= len)
|
||
error (_("Too many super:: uses from '%s'"), scope);
|
||
|
||
offset = offsets[len - n_supers];
|
||
}
|
||
else
|
||
offset = strlen (scope);
|
||
|
||
obstack_grow (&obstack, "::", 2);
|
||
obstack_grow (&obstack, scope, offset);
|
||
obstack_grow (&obstack, "::", 2);
|
||
obstack_grow0 (&obstack, ident->left.sval.ptr, ident->left.sval.length);
|
||
|
||
return ast_path (make_stoken ((const char *) obstack_finish (&obstack)),
|
||
ident->right.params);
|
||
}
|
||
|
||
/* A helper that updates the innermost block as appropriate. */
|
||
|
||
void
|
||
rust_parser::update_innermost_block (struct block_symbol sym)
|
||
{
|
||
if (symbol_read_needs_frame (sym.symbol))
|
||
pstate->block_tracker->update (sym);
|
||
}
|
||
|
||
/* Lex a hex number with at least MIN digits and at most MAX
|
||
digits. */
|
||
|
||
uint32_t
|
||
rust_parser::lex_hex (int min, int max)
|
||
{
|
||
uint32_t result = 0;
|
||
int len = 0;
|
||
/* We only want to stop at MAX if we're lexing a byte escape. */
|
||
int check_max = min == max;
|
||
|
||
while ((check_max ? len <= max : 1)
|
||
&& ((pstate->lexptr[0] >= 'a' && pstate->lexptr[0] <= 'f')
|
||
|| (pstate->lexptr[0] >= 'A' && pstate->lexptr[0] <= 'F')
|
||
|| (pstate->lexptr[0] >= '0' && pstate->lexptr[0] <= '9')))
|
||
{
|
||
result *= 16;
|
||
if (pstate->lexptr[0] >= 'a' && pstate->lexptr[0] <= 'f')
|
||
result = result + 10 + pstate->lexptr[0] - 'a';
|
||
else if (pstate->lexptr[0] >= 'A' && pstate->lexptr[0] <= 'F')
|
||
result = result + 10 + pstate->lexptr[0] - 'A';
|
||
else
|
||
result = result + pstate->lexptr[0] - '0';
|
||
++pstate->lexptr;
|
||
++len;
|
||
}
|
||
|
||
if (len < min)
|
||
error (_("Not enough hex digits seen"));
|
||
if (len > max)
|
||
{
|
||
gdb_assert (min != max);
|
||
error (_("Overlong hex escape"));
|
||
}
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Lex an escape. IS_BYTE is true if we're lexing a byte escape;
|
||
otherwise we're lexing a character escape. */
|
||
|
||
uint32_t
|
||
rust_parser::lex_escape (int is_byte)
|
||
{
|
||
uint32_t result;
|
||
|
||
gdb_assert (pstate->lexptr[0] == '\\');
|
||
++pstate->lexptr;
|
||
switch (pstate->lexptr[0])
|
||
{
|
||
case 'x':
|
||
++pstate->lexptr;
|
||
result = lex_hex (2, 2);
|
||
break;
|
||
|
||
case 'u':
|
||
if (is_byte)
|
||
error (_("Unicode escape in byte literal"));
|
||
++pstate->lexptr;
|
||
if (pstate->lexptr[0] != '{')
|
||
error (_("Missing '{' in Unicode escape"));
|
||
++pstate->lexptr;
|
||
result = lex_hex (1, 6);
|
||
/* Could do range checks here. */
|
||
if (pstate->lexptr[0] != '}')
|
||
error (_("Missing '}' in Unicode escape"));
|
||
++pstate->lexptr;
|
||
break;
|
||
|
||
case 'n':
|
||
result = '\n';
|
||
++pstate->lexptr;
|
||
break;
|
||
case 'r':
|
||
result = '\r';
|
||
++pstate->lexptr;
|
||
break;
|
||
case 't':
|
||
result = '\t';
|
||
++pstate->lexptr;
|
||
break;
|
||
case '\\':
|
||
result = '\\';
|
||
++pstate->lexptr;
|
||
break;
|
||
case '0':
|
||
result = '\0';
|
||
++pstate->lexptr;
|
||
break;
|
||
case '\'':
|
||
result = '\'';
|
||
++pstate->lexptr;
|
||
break;
|
||
case '"':
|
||
result = '"';
|
||
++pstate->lexptr;
|
||
break;
|
||
|
||
default:
|
||
error (_("Invalid escape \\%c in literal"), pstate->lexptr[0]);
|
||
}
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Lex a character constant. */
|
||
|
||
int
|
||
rust_parser::lex_character (YYSTYPE *lvalp)
|
||
{
|
||
int is_byte = 0;
|
||
uint32_t value;
|
||
|
||
if (pstate->lexptr[0] == 'b')
|
||
{
|
||
is_byte = 1;
|
||
++pstate->lexptr;
|
||
}
|
||
gdb_assert (pstate->lexptr[0] == '\'');
|
||
++pstate->lexptr;
|
||
/* This should handle UTF-8 here. */
|
||
if (pstate->lexptr[0] == '\\')
|
||
value = lex_escape (is_byte);
|
||
else
|
||
{
|
||
value = pstate->lexptr[0] & 0xff;
|
||
++pstate->lexptr;
|
||
}
|
||
|
||
if (pstate->lexptr[0] != '\'')
|
||
error (_("Unterminated character literal"));
|
||
++pstate->lexptr;
|
||
|
||
lvalp->typed_val_int.val = value;
|
||
lvalp->typed_val_int.type = get_type (is_byte ? "u8" : "char");
|
||
|
||
return INTEGER;
|
||
}
|
||
|
||
/* Return the offset of the double quote if STR looks like the start
|
||
of a raw string, or 0 if STR does not start a raw string. */
|
||
|
||
static int
|
||
starts_raw_string (const char *str)
|
||
{
|
||
const char *save = str;
|
||
|
||
if (str[0] != 'r')
|
||
return 0;
|
||
++str;
|
||
while (str[0] == '#')
|
||
++str;
|
||
if (str[0] == '"')
|
||
return str - save;
|
||
return 0;
|
||
}
|
||
|
||
/* Return true if STR looks like the end of a raw string that had N
|
||
hashes at the start. */
|
||
|
||
static bool
|
||
ends_raw_string (const char *str, int n)
|
||
{
|
||
int i;
|
||
|
||
gdb_assert (str[0] == '"');
|
||
for (i = 0; i < n; ++i)
|
||
if (str[i + 1] != '#')
|
||
return false;
|
||
return true;
|
||
}
|
||
|
||
/* Lex a string constant. */
|
||
|
||
int
|
||
rust_parser::lex_string (YYSTYPE *lvalp)
|
||
{
|
||
int is_byte = pstate->lexptr[0] == 'b';
|
||
int raw_length;
|
||
|
||
if (is_byte)
|
||
++pstate->lexptr;
|
||
raw_length = starts_raw_string (pstate->lexptr);
|
||
pstate->lexptr += raw_length;
|
||
gdb_assert (pstate->lexptr[0] == '"');
|
||
++pstate->lexptr;
|
||
|
||
while (1)
|
||
{
|
||
uint32_t value;
|
||
|
||
if (raw_length > 0)
|
||
{
|
||
if (pstate->lexptr[0] == '"' && ends_raw_string (pstate->lexptr,
|
||
raw_length - 1))
|
||
{
|
||
/* Exit with lexptr pointing after the final "#". */
|
||
pstate->lexptr += raw_length;
|
||
break;
|
||
}
|
||
else if (pstate->lexptr[0] == '\0')
|
||
error (_("Unexpected EOF in string"));
|
||
|
||
value = pstate->lexptr[0] & 0xff;
|
||
if (is_byte && value > 127)
|
||
error (_("Non-ASCII value in raw byte string"));
|
||
obstack_1grow (&obstack, value);
|
||
|
||
++pstate->lexptr;
|
||
}
|
||
else if (pstate->lexptr[0] == '"')
|
||
{
|
||
/* Make sure to skip the quote. */
|
||
++pstate->lexptr;
|
||
break;
|
||
}
|
||
else if (pstate->lexptr[0] == '\\')
|
||
{
|
||
value = lex_escape (is_byte);
|
||
|
||
if (is_byte)
|
||
obstack_1grow (&obstack, value);
|
||
else
|
||
convert_between_encodings ("UTF-32", "UTF-8", (gdb_byte *) &value,
|
||
sizeof (value), sizeof (value),
|
||
&obstack, translit_none);
|
||
}
|
||
else if (pstate->lexptr[0] == '\0')
|
||
error (_("Unexpected EOF in string"));
|
||
else
|
||
{
|
||
value = pstate->lexptr[0] & 0xff;
|
||
if (is_byte && value > 127)
|
||
error (_("Non-ASCII value in byte string"));
|
||
obstack_1grow (&obstack, value);
|
||
++pstate->lexptr;
|
||
}
|
||
}
|
||
|
||
lvalp->sval.length = obstack_object_size (&obstack);
|
||
lvalp->sval.ptr = (const char *) obstack_finish (&obstack);
|
||
return is_byte ? BYTESTRING : STRING;
|
||
}
|
||
|
||
/* Return true if STRING starts with whitespace followed by a digit. */
|
||
|
||
static bool
|
||
space_then_number (const char *string)
|
||
{
|
||
const char *p = string;
|
||
|
||
while (p[0] == ' ' || p[0] == '\t')
|
||
++p;
|
||
if (p == string)
|
||
return false;
|
||
|
||
return *p >= '0' && *p <= '9';
|
||
}
|
||
|
||
/* Return true if C can start an identifier. */
|
||
|
||
static bool
|
||
rust_identifier_start_p (char c)
|
||
{
|
||
return ((c >= 'a' && c <= 'z')
|
||
|| (c >= 'A' && c <= 'Z')
|
||
|| c == '_'
|
||
|| c == '$');
|
||
}
|
||
|
||
/* Lex an identifier. */
|
||
|
||
int
|
||
rust_parser::lex_identifier (YYSTYPE *lvalp)
|
||
{
|
||
const char *start = pstate->lexptr;
|
||
unsigned int length;
|
||
const struct token_info *token;
|
||
int i;
|
||
int is_gdb_var = pstate->lexptr[0] == '$';
|
||
|
||
gdb_assert (rust_identifier_start_p (pstate->lexptr[0]));
|
||
|
||
++pstate->lexptr;
|
||
|
||
/* For the time being this doesn't handle Unicode rules. Non-ASCII
|
||
identifiers are gated anyway. */
|
||
while ((pstate->lexptr[0] >= 'a' && pstate->lexptr[0] <= 'z')
|
||
|| (pstate->lexptr[0] >= 'A' && pstate->lexptr[0] <= 'Z')
|
||
|| pstate->lexptr[0] == '_'
|
||
|| (is_gdb_var && pstate->lexptr[0] == '$')
|
||
|| (pstate->lexptr[0] >= '0' && pstate->lexptr[0] <= '9'))
|
||
++pstate->lexptr;
|
||
|
||
|
||
length = pstate->lexptr - start;
|
||
token = NULL;
|
||
for (i = 0; i < ARRAY_SIZE (identifier_tokens); ++i)
|
||
{
|
||
if (length == strlen (identifier_tokens[i].name)
|
||
&& strncmp (identifier_tokens[i].name, start, length) == 0)
|
||
{
|
||
token = &identifier_tokens[i];
|
||
break;
|
||
}
|
||
}
|
||
|
||
if (token != NULL)
|
||
{
|
||
if (token->value == 0)
|
||
{
|
||
/* Leave the terminating token alone. */
|
||
pstate->lexptr = start;
|
||
return 0;
|
||
}
|
||
}
|
||
else if (token == NULL
|
||
&& (strncmp (start, "thread", length) == 0
|
||
|| strncmp (start, "task", length) == 0)
|
||
&& space_then_number (pstate->lexptr))
|
||
{
|
||
/* "task" or "thread" followed by a number terminates the
|
||
parse, per gdb rules. */
|
||
pstate->lexptr = start;
|
||
return 0;
|
||
}
|
||
|
||
if (token == NULL || (pstate->parse_completion && pstate->lexptr[0] == '\0'))
|
||
lvalp->sval = make_stoken (copy_name (start, length));
|
||
|
||
if (pstate->parse_completion && pstate->lexptr[0] == '\0')
|
||
{
|
||
/* Prevent rustyylex from returning two COMPLETE tokens. */
|
||
pstate->prev_lexptr = pstate->lexptr;
|
||
return COMPLETE;
|
||
}
|
||
|
||
if (token != NULL)
|
||
return token->value;
|
||
if (is_gdb_var)
|
||
return GDBVAR;
|
||
return IDENT;
|
||
}
|
||
|
||
/* Lex an operator. */
|
||
|
||
int
|
||
rust_parser::lex_operator (YYSTYPE *lvalp)
|
||
{
|
||
const struct token_info *token = NULL;
|
||
int i;
|
||
|
||
for (i = 0; i < ARRAY_SIZE (operator_tokens); ++i)
|
||
{
|
||
if (strncmp (operator_tokens[i].name, pstate->lexptr,
|
||
strlen (operator_tokens[i].name)) == 0)
|
||
{
|
||
pstate->lexptr += strlen (operator_tokens[i].name);
|
||
token = &operator_tokens[i];
|
||
break;
|
||
}
|
||
}
|
||
|
||
if (token != NULL)
|
||
{
|
||
lvalp->opcode = token->opcode;
|
||
return token->value;
|
||
}
|
||
|
||
return *pstate->lexptr++;
|
||
}
|
||
|
||
/* Lex a number. */
|
||
|
||
int
|
||
rust_parser::lex_number (YYSTYPE *lvalp)
|
||
{
|
||
regmatch_t subexps[NUM_SUBEXPRESSIONS];
|
||
int match;
|
||
int is_integer = 0;
|
||
int could_be_decimal = 1;
|
||
int implicit_i32 = 0;
|
||
const char *type_name = NULL;
|
||
struct type *type;
|
||
int end_index;
|
||
int type_index = -1;
|
||
int i;
|
||
|
||
match = regexec (&number_regex, pstate->lexptr, ARRAY_SIZE (subexps),
|
||
subexps, 0);
|
||
/* Failure means the regexp is broken. */
|
||
gdb_assert (match == 0);
|
||
|
||
if (subexps[INT_TEXT].rm_so != -1)
|
||
{
|
||
/* Integer part matched. */
|
||
is_integer = 1;
|
||
end_index = subexps[INT_TEXT].rm_eo;
|
||
if (subexps[INT_TYPE].rm_so == -1)
|
||
{
|
||
type_name = "i32";
|
||
implicit_i32 = 1;
|
||
}
|
||
else
|
||
{
|
||
type_index = INT_TYPE;
|
||
could_be_decimal = 0;
|
||
}
|
||
}
|
||
else if (subexps[FLOAT_TYPE1].rm_so != -1)
|
||
{
|
||
/* Found floating point type suffix. */
|
||
end_index = subexps[FLOAT_TYPE1].rm_so;
|
||
type_index = FLOAT_TYPE1;
|
||
}
|
||
else if (subexps[FLOAT_TYPE2].rm_so != -1)
|
||
{
|
||
/* Found floating point type suffix. */
|
||
end_index = subexps[FLOAT_TYPE2].rm_so;
|
||
type_index = FLOAT_TYPE2;
|
||
}
|
||
else
|
||
{
|
||
/* Any other floating point match. */
|
||
end_index = subexps[0].rm_eo;
|
||
type_name = "f64";
|
||
}
|
||
|
||
/* We need a special case if the final character is ".". In this
|
||
case we might need to parse an integer. For example, "23.f()" is
|
||
a request for a trait method call, not a syntax error involving
|
||
the floating point number "23.". */
|
||
gdb_assert (subexps[0].rm_eo > 0);
|
||
if (pstate->lexptr[subexps[0].rm_eo - 1] == '.')
|
||
{
|
||
const char *next = skip_spaces (&pstate->lexptr[subexps[0].rm_eo]);
|
||
|
||
if (rust_identifier_start_p (*next) || *next == '.')
|
||
{
|
||
--subexps[0].rm_eo;
|
||
is_integer = 1;
|
||
end_index = subexps[0].rm_eo;
|
||
type_name = "i32";
|
||
could_be_decimal = 1;
|
||
implicit_i32 = 1;
|
||
}
|
||
}
|
||
|
||
/* Compute the type name if we haven't already. */
|
||
std::string type_name_holder;
|
||
if (type_name == NULL)
|
||
{
|
||
gdb_assert (type_index != -1);
|
||
type_name_holder = std::string ((pstate->lexptr
|
||
+ subexps[type_index].rm_so),
|
||
(subexps[type_index].rm_eo
|
||
- subexps[type_index].rm_so));
|
||
type_name = type_name_holder.c_str ();
|
||
}
|
||
|
||
/* Look up the type. */
|
||
type = get_type (type_name);
|
||
|
||
/* Copy the text of the number and remove the "_"s. */
|
||
std::string number;
|
||
for (i = 0; i < end_index && pstate->lexptr[i]; ++i)
|
||
{
|
||
if (pstate->lexptr[i] == '_')
|
||
could_be_decimal = 0;
|
||
else
|
||
number.push_back (pstate->lexptr[i]);
|
||
}
|
||
|
||
/* Advance past the match. */
|
||
pstate->lexptr += subexps[0].rm_eo;
|
||
|
||
/* Parse the number. */
|
||
if (is_integer)
|
||
{
|
||
uint64_t value;
|
||
int radix = 10;
|
||
int offset = 0;
|
||
|
||
if (number[0] == '0')
|
||
{
|
||
if (number[1] == 'x')
|
||
radix = 16;
|
||
else if (number[1] == 'o')
|
||
radix = 8;
|
||
else if (number[1] == 'b')
|
||
radix = 2;
|
||
if (radix != 10)
|
||
{
|
||
offset = 2;
|
||
could_be_decimal = 0;
|
||
}
|
||
}
|
||
|
||
value = strtoulst (number.c_str () + offset, NULL, radix);
|
||
if (implicit_i32 && value >= ((uint64_t) 1) << 31)
|
||
type = get_type ("i64");
|
||
|
||
lvalp->typed_val_int.val = value;
|
||
lvalp->typed_val_int.type = type;
|
||
}
|
||
else
|
||
{
|
||
lvalp->typed_val_float.type = type;
|
||
bool parsed = parse_float (number.c_str (), number.length (),
|
||
lvalp->typed_val_float.type,
|
||
lvalp->typed_val_float.val);
|
||
gdb_assert (parsed);
|
||
}
|
||
|
||
return is_integer ? (could_be_decimal ? DECIMAL_INTEGER : INTEGER) : FLOAT;
|
||
}
|
||
|
||
/* The lexer. */
|
||
|
||
static int
|
||
rustyylex (YYSTYPE *lvalp, rust_parser *parser)
|
||
{
|
||
struct parser_state *pstate = parser->pstate;
|
||
|
||
/* Skip all leading whitespace. */
|
||
while (pstate->lexptr[0] == ' '
|
||
|| pstate->lexptr[0] == '\t'
|
||
|| pstate->lexptr[0] == '\r'
|
||
|| pstate->lexptr[0] == '\n')
|
||
++pstate->lexptr;
|
||
|
||
/* If we hit EOF and we're completing, then return COMPLETE -- maybe
|
||
we're completing an empty string at the end of a field_expr.
|
||
But, we don't want to return two COMPLETE tokens in a row. */
|
||
if (pstate->lexptr[0] == '\0' && pstate->lexptr == pstate->prev_lexptr)
|
||
return 0;
|
||
pstate->prev_lexptr = pstate->lexptr;
|
||
if (pstate->lexptr[0] == '\0')
|
||
{
|
||
if (pstate->parse_completion)
|
||
{
|
||
lvalp->sval = make_stoken ("");
|
||
return COMPLETE;
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
if (pstate->lexptr[0] >= '0' && pstate->lexptr[0] <= '9')
|
||
return parser->lex_number (lvalp);
|
||
else if (pstate->lexptr[0] == 'b' && pstate->lexptr[1] == '\'')
|
||
return parser->lex_character (lvalp);
|
||
else if (pstate->lexptr[0] == 'b' && pstate->lexptr[1] == '"')
|
||
return parser->lex_string (lvalp);
|
||
else if (pstate->lexptr[0] == 'b' && starts_raw_string (pstate->lexptr + 1))
|
||
return parser->lex_string (lvalp);
|
||
else if (starts_raw_string (pstate->lexptr))
|
||
return parser->lex_string (lvalp);
|
||
else if (rust_identifier_start_p (pstate->lexptr[0]))
|
||
return parser->lex_identifier (lvalp);
|
||
else if (pstate->lexptr[0] == '"')
|
||
return parser->lex_string (lvalp);
|
||
else if (pstate->lexptr[0] == '\'')
|
||
return parser->lex_character (lvalp);
|
||
else if (pstate->lexptr[0] == '}' || pstate->lexptr[0] == ']')
|
||
{
|
||
/* Falls through to lex_operator. */
|
||
--parser->paren_depth;
|
||
}
|
||
else if (pstate->lexptr[0] == '(' || pstate->lexptr[0] == '{')
|
||
{
|
||
/* Falls through to lex_operator. */
|
||
++parser->paren_depth;
|
||
}
|
||
else if (pstate->lexptr[0] == ',' && pstate->comma_terminates
|
||
&& parser->paren_depth == 0)
|
||
return 0;
|
||
|
||
return parser->lex_operator (lvalp);
|
||
}
|
||
|
||
/* Push back a single character to be re-lexed. */
|
||
|
||
void
|
||
rust_parser::push_back (char c)
|
||
{
|
||
/* Can't be called before any lexing. */
|
||
gdb_assert (pstate->prev_lexptr != NULL);
|
||
|
||
--pstate->lexptr;
|
||
gdb_assert (*pstate->lexptr == c);
|
||
}
|
||
|
||
|
||
|
||
/* Make an arbitrary operation and fill in the fields. */
|
||
|
||
const struct rust_op *
|
||
rust_parser::ast_operation (enum exp_opcode opcode, const struct rust_op *left,
|
||
const struct rust_op *right)
|
||
{
|
||
struct rust_op *result = OBSTACK_ZALLOC (&obstack, struct rust_op);
|
||
|
||
result->opcode = opcode;
|
||
result->left.op = left;
|
||
result->right.op = right;
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Make a compound assignment operation. */
|
||
|
||
const struct rust_op *
|
||
rust_parser::ast_compound_assignment (enum exp_opcode opcode,
|
||
const struct rust_op *left,
|
||
const struct rust_op *right)
|
||
{
|
||
struct rust_op *result = OBSTACK_ZALLOC (&obstack, struct rust_op);
|
||
|
||
result->opcode = opcode;
|
||
result->compound_assignment = 1;
|
||
result->left.op = left;
|
||
result->right.op = right;
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Make a typed integer literal operation. */
|
||
|
||
const struct rust_op *
|
||
rust_parser::ast_literal (struct typed_val_int val)
|
||
{
|
||
struct rust_op *result = OBSTACK_ZALLOC (&obstack, struct rust_op);
|
||
|
||
result->opcode = OP_LONG;
|
||
result->left.typed_val_int = val;
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Make a typed floating point literal operation. */
|
||
|
||
const struct rust_op *
|
||
rust_parser::ast_dliteral (struct typed_val_float val)
|
||
{
|
||
struct rust_op *result = OBSTACK_ZALLOC (&obstack, struct rust_op);
|
||
|
||
result->opcode = OP_FLOAT;
|
||
result->left.typed_val_float = val;
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Make a unary operation. */
|
||
|
||
const struct rust_op *
|
||
rust_parser::ast_unary (enum exp_opcode opcode, const struct rust_op *expr)
|
||
{
|
||
return ast_operation (opcode, expr, NULL);
|
||
}
|
||
|
||
/* Make a cast operation. */
|
||
|
||
const struct rust_op *
|
||
rust_parser::ast_cast (const struct rust_op *expr, const struct rust_op *type)
|
||
{
|
||
struct rust_op *result = OBSTACK_ZALLOC (&obstack, struct rust_op);
|
||
|
||
result->opcode = UNOP_CAST;
|
||
result->left.op = expr;
|
||
result->right.op = type;
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Make a call-like operation. This is nominally a function call, but
|
||
when lowering we may discover that it actually represents the
|
||
creation of a tuple struct. */
|
||
|
||
const struct rust_op *
|
||
rust_parser::ast_call_ish (enum exp_opcode opcode, const struct rust_op *expr,
|
||
rust_op_vector *params)
|
||
{
|
||
struct rust_op *result = OBSTACK_ZALLOC (&obstack, struct rust_op);
|
||
|
||
result->opcode = opcode;
|
||
result->left.op = expr;
|
||
result->right.params = params;
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Make a structure creation operation. */
|
||
|
||
const struct rust_op *
|
||
rust_parser::ast_struct (const struct rust_op *name, rust_set_vector *fields)
|
||
{
|
||
struct rust_op *result = OBSTACK_ZALLOC (&obstack, struct rust_op);
|
||
|
||
result->opcode = OP_AGGREGATE;
|
||
result->left.op = name;
|
||
result->right.field_inits = fields;
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Make an identifier path. */
|
||
|
||
const struct rust_op *
|
||
rust_parser::ast_path (struct stoken path, rust_op_vector *params)
|
||
{
|
||
struct rust_op *result = OBSTACK_ZALLOC (&obstack, struct rust_op);
|
||
|
||
result->opcode = OP_VAR_VALUE;
|
||
result->left.sval = path;
|
||
result->right.params = params;
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Make a string constant operation. */
|
||
|
||
const struct rust_op *
|
||
rust_parser::ast_string (struct stoken str)
|
||
{
|
||
struct rust_op *result = OBSTACK_ZALLOC (&obstack, struct rust_op);
|
||
|
||
result->opcode = OP_STRING;
|
||
result->left.sval = str;
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Make a field expression. */
|
||
|
||
const struct rust_op *
|
||
rust_parser::ast_structop (const struct rust_op *left, const char *name,
|
||
int completing)
|
||
{
|
||
struct rust_op *result = OBSTACK_ZALLOC (&obstack, struct rust_op);
|
||
|
||
result->opcode = STRUCTOP_STRUCT;
|
||
result->completing = completing;
|
||
result->left.op = left;
|
||
result->right.sval = make_stoken (name);
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Make an anonymous struct operation, like 'x.0'. */
|
||
|
||
const struct rust_op *
|
||
rust_parser::ast_structop_anonymous (const struct rust_op *left,
|
||
struct typed_val_int number)
|
||
{
|
||
struct rust_op *result = OBSTACK_ZALLOC (&obstack, struct rust_op);
|
||
|
||
result->opcode = STRUCTOP_ANONYMOUS;
|
||
result->left.op = left;
|
||
result->right.typed_val_int = number;
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Make a range operation. */
|
||
|
||
const struct rust_op *
|
||
rust_parser::ast_range (const struct rust_op *lhs, const struct rust_op *rhs,
|
||
bool inclusive)
|
||
{
|
||
struct rust_op *result = OBSTACK_ZALLOC (&obstack, struct rust_op);
|
||
|
||
result->opcode = OP_RANGE;
|
||
result->inclusive = inclusive;
|
||
result->left.op = lhs;
|
||
result->right.op = rhs;
|
||
|
||
return result;
|
||
}
|
||
|
||
/* A helper function to make a type-related AST node. */
|
||
|
||
struct rust_op *
|
||
rust_parser::ast_basic_type (enum type_code typecode)
|
||
{
|
||
struct rust_op *result = OBSTACK_ZALLOC (&obstack, struct rust_op);
|
||
|
||
result->opcode = OP_TYPE;
|
||
result->typecode = typecode;
|
||
return result;
|
||
}
|
||
|
||
/* Create an AST node describing an array type. */
|
||
|
||
const struct rust_op *
|
||
rust_parser::ast_array_type (const struct rust_op *lhs,
|
||
struct typed_val_int val)
|
||
{
|
||
struct rust_op *result = ast_basic_type (TYPE_CODE_ARRAY);
|
||
|
||
result->left.op = lhs;
|
||
result->right.typed_val_int = val;
|
||
return result;
|
||
}
|
||
|
||
/* Create an AST node describing a reference type. */
|
||
|
||
const struct rust_op *
|
||
rust_parser::ast_slice_type (const struct rust_op *type)
|
||
{
|
||
/* Use TYPE_CODE_COMPLEX just because it is handy. */
|
||
struct rust_op *result = ast_basic_type (TYPE_CODE_COMPLEX);
|
||
|
||
result->left.op = type;
|
||
return result;
|
||
}
|
||
|
||
/* Create an AST node describing a reference type. */
|
||
|
||
const struct rust_op *
|
||
rust_parser::ast_reference_type (const struct rust_op *type)
|
||
{
|
||
struct rust_op *result = ast_basic_type (TYPE_CODE_REF);
|
||
|
||
result->left.op = type;
|
||
return result;
|
||
}
|
||
|
||
/* Create an AST node describing a pointer type. */
|
||
|
||
const struct rust_op *
|
||
rust_parser::ast_pointer_type (const struct rust_op *type, int is_mut)
|
||
{
|
||
struct rust_op *result = ast_basic_type (TYPE_CODE_PTR);
|
||
|
||
result->left.op = type;
|
||
/* For the time being we ignore is_mut. */
|
||
return result;
|
||
}
|
||
|
||
/* Create an AST node describing a function type. */
|
||
|
||
const struct rust_op *
|
||
rust_parser::ast_function_type (const struct rust_op *rtype,
|
||
rust_op_vector *params)
|
||
{
|
||
struct rust_op *result = ast_basic_type (TYPE_CODE_FUNC);
|
||
|
||
result->left.op = rtype;
|
||
result->right.params = params;
|
||
return result;
|
||
}
|
||
|
||
/* Create an AST node describing a tuple type. */
|
||
|
||
const struct rust_op *
|
||
rust_parser::ast_tuple_type (rust_op_vector *params)
|
||
{
|
||
struct rust_op *result = ast_basic_type (TYPE_CODE_STRUCT);
|
||
|
||
result->left.params = params;
|
||
return result;
|
||
}
|
||
|
||
/* A helper to appropriately munge NAME and BLOCK depending on the
|
||
presence of a leading "::". */
|
||
|
||
static void
|
||
munge_name_and_block (const char **name, const struct block **block)
|
||
{
|
||
/* If it is a global reference, skip the current block in favor of
|
||
the static block. */
|
||
if (strncmp (*name, "::", 2) == 0)
|
||
{
|
||
*name += 2;
|
||
*block = block_static_block (*block);
|
||
}
|
||
}
|
||
|
||
/* Like lookup_symbol, but handles Rust namespace conventions, and
|
||
doesn't require field_of_this_result. */
|
||
|
||
struct block_symbol
|
||
rust_parser::lookup_symbol (const char *name, const struct block *block,
|
||
const domain_enum domain)
|
||
{
|
||
struct block_symbol result;
|
||
|
||
munge_name_and_block (&name, &block);
|
||
|
||
result = ::lookup_symbol (name, block, domain, NULL);
|
||
if (result.symbol != NULL)
|
||
update_innermost_block (result);
|
||
return result;
|
||
}
|
||
|
||
/* Look up a type, following Rust namespace conventions. */
|
||
|
||
struct type *
|
||
rust_parser::rust_lookup_type (const char *name, const struct block *block)
|
||
{
|
||
struct block_symbol result;
|
||
struct type *type;
|
||
|
||
munge_name_and_block (&name, &block);
|
||
|
||
result = ::lookup_symbol (name, block, STRUCT_DOMAIN, NULL);
|
||
if (result.symbol != NULL)
|
||
{
|
||
update_innermost_block (result);
|
||
return SYMBOL_TYPE (result.symbol);
|
||
}
|
||
|
||
type = lookup_typename (language (), name, NULL, 1);
|
||
if (type != NULL)
|
||
return type;
|
||
|
||
/* Last chance, try a built-in type. */
|
||
return language_lookup_primitive_type (language (), arch (), name);
|
||
}
|
||
|
||
/* Convert a vector of rust_ops representing types to a vector of
|
||
types. */
|
||
|
||
std::vector<struct type *>
|
||
rust_parser::convert_params_to_types (rust_op_vector *params)
|
||
{
|
||
std::vector<struct type *> result;
|
||
|
||
if (params != nullptr)
|
||
{
|
||
for (const rust_op *op : *params)
|
||
result.push_back (convert_ast_to_type (op));
|
||
}
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Convert a rust_op representing a type to a struct type *. */
|
||
|
||
struct type *
|
||
rust_parser::convert_ast_to_type (const struct rust_op *operation)
|
||
{
|
||
struct type *type, *result = NULL;
|
||
|
||
if (operation->opcode == OP_VAR_VALUE)
|
||
{
|
||
const char *varname = convert_name (operation);
|
||
|
||
result = rust_lookup_type (varname, pstate->expression_context_block);
|
||
if (result == NULL)
|
||
error (_("No typed name '%s' in current context"), varname);
|
||
return result;
|
||
}
|
||
|
||
gdb_assert (operation->opcode == OP_TYPE);
|
||
|
||
switch (operation->typecode)
|
||
{
|
||
case TYPE_CODE_ARRAY:
|
||
type = convert_ast_to_type (operation->left.op);
|
||
if (operation->right.typed_val_int.val < 0)
|
||
error (_("Negative array length"));
|
||
result = lookup_array_range_type (type, 0,
|
||
operation->right.typed_val_int.val - 1);
|
||
break;
|
||
|
||
case TYPE_CODE_COMPLEX:
|
||
{
|
||
struct type *usize = get_type ("usize");
|
||
|
||
type = convert_ast_to_type (operation->left.op);
|
||
result = rust_slice_type ("&[*gdb*]", type, usize);
|
||
}
|
||
break;
|
||
|
||
case TYPE_CODE_REF:
|
||
case TYPE_CODE_PTR:
|
||
/* For now we treat &x and *x identically. */
|
||
type = convert_ast_to_type (operation->left.op);
|
||
result = lookup_pointer_type (type);
|
||
break;
|
||
|
||
case TYPE_CODE_FUNC:
|
||
{
|
||
std::vector<struct type *> args
|
||
(convert_params_to_types (operation->right.params));
|
||
struct type **argtypes = NULL;
|
||
|
||
type = convert_ast_to_type (operation->left.op);
|
||
if (!args.empty ())
|
||
argtypes = args.data ();
|
||
|
||
result
|
||
= lookup_function_type_with_arguments (type, args.size (),
|
||
argtypes);
|
||
result = lookup_pointer_type (result);
|
||
}
|
||
break;
|
||
|
||
case TYPE_CODE_STRUCT:
|
||
{
|
||
std::vector<struct type *> args
|
||
(convert_params_to_types (operation->left.params));
|
||
int i;
|
||
const char *name;
|
||
|
||
obstack_1grow (&obstack, '(');
|
||
for (i = 0; i < args.size (); ++i)
|
||
{
|
||
std::string type_name = type_to_string (args[i]);
|
||
|
||
if (i > 0)
|
||
obstack_1grow (&obstack, ',');
|
||
obstack_grow_str (&obstack, type_name.c_str ());
|
||
}
|
||
|
||
obstack_grow_str0 (&obstack, ")");
|
||
name = (const char *) obstack_finish (&obstack);
|
||
|
||
/* We don't allow creating new tuple types (yet), but we do
|
||
allow looking up existing tuple types. */
|
||
result = rust_lookup_type (name, pstate->expression_context_block);
|
||
if (result == NULL)
|
||
error (_("could not find tuple type '%s'"), name);
|
||
}
|
||
break;
|
||
|
||
default:
|
||
gdb_assert_not_reached ("unhandled opcode in convert_ast_to_type");
|
||
}
|
||
|
||
gdb_assert (result != NULL);
|
||
return result;
|
||
}
|
||
|
||
/* A helper function to turn a rust_op representing a name into a full
|
||
name. This applies generic arguments as needed. The returned name
|
||
is allocated on the work obstack. */
|
||
|
||
const char *
|
||
rust_parser::convert_name (const struct rust_op *operation)
|
||
{
|
||
int i;
|
||
|
||
gdb_assert (operation->opcode == OP_VAR_VALUE);
|
||
|
||
if (operation->right.params == NULL)
|
||
return operation->left.sval.ptr;
|
||
|
||
std::vector<struct type *> types
|
||
(convert_params_to_types (operation->right.params));
|
||
|
||
obstack_grow_str (&obstack, operation->left.sval.ptr);
|
||
obstack_1grow (&obstack, '<');
|
||
for (i = 0; i < types.size (); ++i)
|
||
{
|
||
std::string type_name = type_to_string (types[i]);
|
||
|
||
if (i > 0)
|
||
obstack_1grow (&obstack, ',');
|
||
|
||
obstack_grow_str (&obstack, type_name.c_str ());
|
||
}
|
||
obstack_grow_str0 (&obstack, ">");
|
||
|
||
return (const char *) obstack_finish (&obstack);
|
||
}
|
||
|
||
/* A helper function that converts a vec of rust_ops to a gdb
|
||
expression. */
|
||
|
||
void
|
||
rust_parser::convert_params_to_expression (rust_op_vector *params,
|
||
const struct rust_op *top)
|
||
{
|
||
for (const rust_op *elem : *params)
|
||
convert_ast_to_expression (elem, top);
|
||
}
|
||
|
||
/* Lower a rust_op to a gdb expression. STATE is the parser state.
|
||
OPERATION is the operation to lower. TOP is a pointer to the
|
||
top-most operation; it is used to handle the special case where the
|
||
top-most expression is an identifier and can be optionally lowered
|
||
to OP_TYPE. WANT_TYPE is a flag indicating that, if the expression
|
||
is the name of a type, then emit an OP_TYPE for it (rather than
|
||
erroring). If WANT_TYPE is set, then the similar TOP handling is
|
||
not done. */
|
||
|
||
void
|
||
rust_parser::convert_ast_to_expression (const struct rust_op *operation,
|
||
const struct rust_op *top,
|
||
bool want_type)
|
||
{
|
||
switch (operation->opcode)
|
||
{
|
||
case OP_LONG:
|
||
write_exp_elt_opcode (pstate, OP_LONG);
|
||
write_exp_elt_type (pstate, operation->left.typed_val_int.type);
|
||
write_exp_elt_longcst (pstate, operation->left.typed_val_int.val);
|
||
write_exp_elt_opcode (pstate, OP_LONG);
|
||
break;
|
||
|
||
case OP_FLOAT:
|
||
write_exp_elt_opcode (pstate, OP_FLOAT);
|
||
write_exp_elt_type (pstate, operation->left.typed_val_float.type);
|
||
write_exp_elt_floatcst (pstate, operation->left.typed_val_float.val);
|
||
write_exp_elt_opcode (pstate, OP_FLOAT);
|
||
break;
|
||
|
||
case STRUCTOP_STRUCT:
|
||
{
|
||
convert_ast_to_expression (operation->left.op, top);
|
||
|
||
if (operation->completing)
|
||
pstate->mark_struct_expression ();
|
||
write_exp_elt_opcode (pstate, STRUCTOP_STRUCT);
|
||
write_exp_string (pstate, operation->right.sval);
|
||
write_exp_elt_opcode (pstate, STRUCTOP_STRUCT);
|
||
}
|
||
break;
|
||
|
||
case STRUCTOP_ANONYMOUS:
|
||
{
|
||
convert_ast_to_expression (operation->left.op, top);
|
||
|
||
write_exp_elt_opcode (pstate, STRUCTOP_ANONYMOUS);
|
||
write_exp_elt_longcst (pstate, operation->right.typed_val_int.val);
|
||
write_exp_elt_opcode (pstate, STRUCTOP_ANONYMOUS);
|
||
}
|
||
break;
|
||
|
||
case UNOP_SIZEOF:
|
||
convert_ast_to_expression (operation->left.op, top, true);
|
||
write_exp_elt_opcode (pstate, UNOP_SIZEOF);
|
||
break;
|
||
|
||
case UNOP_PLUS:
|
||
case UNOP_NEG:
|
||
case UNOP_COMPLEMENT:
|
||
case UNOP_IND:
|
||
case UNOP_ADDR:
|
||
convert_ast_to_expression (operation->left.op, top);
|
||
write_exp_elt_opcode (pstate, operation->opcode);
|
||
break;
|
||
|
||
case BINOP_SUBSCRIPT:
|
||
case BINOP_MUL:
|
||
case BINOP_REPEAT:
|
||
case BINOP_DIV:
|
||
case BINOP_REM:
|
||
case BINOP_LESS:
|
||
case BINOP_GTR:
|
||
case BINOP_BITWISE_AND:
|
||
case BINOP_BITWISE_IOR:
|
||
case BINOP_BITWISE_XOR:
|
||
case BINOP_ADD:
|
||
case BINOP_SUB:
|
||
case BINOP_LOGICAL_OR:
|
||
case BINOP_LOGICAL_AND:
|
||
case BINOP_EQUAL:
|
||
case BINOP_NOTEQUAL:
|
||
case BINOP_LEQ:
|
||
case BINOP_GEQ:
|
||
case BINOP_LSH:
|
||
case BINOP_RSH:
|
||
case BINOP_ASSIGN:
|
||
case OP_RUST_ARRAY:
|
||
convert_ast_to_expression (operation->left.op, top);
|
||
convert_ast_to_expression (operation->right.op, top);
|
||
if (operation->compound_assignment)
|
||
{
|
||
write_exp_elt_opcode (pstate, BINOP_ASSIGN_MODIFY);
|
||
write_exp_elt_opcode (pstate, operation->opcode);
|
||
write_exp_elt_opcode (pstate, BINOP_ASSIGN_MODIFY);
|
||
}
|
||
else
|
||
write_exp_elt_opcode (pstate, operation->opcode);
|
||
|
||
if (operation->compound_assignment
|
||
|| operation->opcode == BINOP_ASSIGN)
|
||
{
|
||
struct type *type;
|
||
|
||
type = language_lookup_primitive_type (pstate->language (),
|
||
pstate->gdbarch (),
|
||
"()");
|
||
|
||
write_exp_elt_opcode (pstate, OP_LONG);
|
||
write_exp_elt_type (pstate, type);
|
||
write_exp_elt_longcst (pstate, 0);
|
||
write_exp_elt_opcode (pstate, OP_LONG);
|
||
|
||
write_exp_elt_opcode (pstate, BINOP_COMMA);
|
||
}
|
||
break;
|
||
|
||
case UNOP_CAST:
|
||
{
|
||
struct type *type = convert_ast_to_type (operation->right.op);
|
||
|
||
convert_ast_to_expression (operation->left.op, top);
|
||
write_exp_elt_opcode (pstate, UNOP_CAST);
|
||
write_exp_elt_type (pstate, type);
|
||
write_exp_elt_opcode (pstate, UNOP_CAST);
|
||
}
|
||
break;
|
||
|
||
case OP_FUNCALL:
|
||
{
|
||
if (operation->left.op->opcode == OP_VAR_VALUE)
|
||
{
|
||
struct type *type;
|
||
const char *varname = convert_name (operation->left.op);
|
||
|
||
type = rust_lookup_type (varname,
|
||
pstate->expression_context_block);
|
||
if (type != NULL)
|
||
{
|
||
/* This is actually a tuple struct expression, not a
|
||
call expression. */
|
||
rust_op_vector *params = operation->right.params;
|
||
|
||
if (type->code () != TYPE_CODE_NAMESPACE)
|
||
{
|
||
if (!rust_tuple_struct_type_p (type))
|
||
error (_("Type %s is not a tuple struct"), varname);
|
||
|
||
for (int i = 0; i < params->size (); ++i)
|
||
{
|
||
char *cell = get_print_cell ();
|
||
|
||
xsnprintf (cell, PRINT_CELL_SIZE, "__%d", i);
|
||
write_exp_elt_opcode (pstate, OP_NAME);
|
||
write_exp_string (pstate, make_stoken (cell));
|
||
write_exp_elt_opcode (pstate, OP_NAME);
|
||
|
||
convert_ast_to_expression ((*params)[i], top);
|
||
}
|
||
|
||
write_exp_elt_opcode (pstate, OP_AGGREGATE);
|
||
write_exp_elt_type (pstate, type);
|
||
write_exp_elt_longcst (pstate, 2 * params->size ());
|
||
write_exp_elt_opcode (pstate, OP_AGGREGATE);
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
convert_ast_to_expression (operation->left.op, top);
|
||
convert_params_to_expression (operation->right.params, top);
|
||
write_exp_elt_opcode (pstate, OP_FUNCALL);
|
||
write_exp_elt_longcst (pstate, operation->right.params->size ());
|
||
write_exp_elt_longcst (pstate, OP_FUNCALL);
|
||
}
|
||
break;
|
||
|
||
case OP_ARRAY:
|
||
gdb_assert (operation->left.op == NULL);
|
||
convert_params_to_expression (operation->right.params, top);
|
||
write_exp_elt_opcode (pstate, OP_ARRAY);
|
||
write_exp_elt_longcst (pstate, 0);
|
||
write_exp_elt_longcst (pstate, operation->right.params->size () - 1);
|
||
write_exp_elt_longcst (pstate, OP_ARRAY);
|
||
break;
|
||
|
||
case OP_VAR_VALUE:
|
||
{
|
||
struct block_symbol sym;
|
||
const char *varname;
|
||
|
||
if (operation->left.sval.ptr[0] == '$')
|
||
{
|
||
write_dollar_variable (pstate, operation->left.sval);
|
||
break;
|
||
}
|
||
|
||
varname = convert_name (operation);
|
||
sym = lookup_symbol (varname, pstate->expression_context_block,
|
||
VAR_DOMAIN);
|
||
if (sym.symbol != NULL && SYMBOL_CLASS (sym.symbol) != LOC_TYPEDEF)
|
||
{
|
||
write_exp_elt_opcode (pstate, OP_VAR_VALUE);
|
||
write_exp_elt_block (pstate, sym.block);
|
||
write_exp_elt_sym (pstate, sym.symbol);
|
||
write_exp_elt_opcode (pstate, OP_VAR_VALUE);
|
||
}
|
||
else
|
||
{
|
||
struct type *type = NULL;
|
||
|
||
if (sym.symbol != NULL)
|
||
{
|
||
gdb_assert (SYMBOL_CLASS (sym.symbol) == LOC_TYPEDEF);
|
||
type = SYMBOL_TYPE (sym.symbol);
|
||
}
|
||
if (type == NULL)
|
||
type = rust_lookup_type (varname,
|
||
pstate->expression_context_block);
|
||
if (type == NULL)
|
||
error (_("No symbol '%s' in current context"), varname);
|
||
|
||
if (!want_type
|
||
&& type->code () == TYPE_CODE_STRUCT
|
||
&& type->num_fields () == 0)
|
||
{
|
||
/* A unit-like struct. */
|
||
write_exp_elt_opcode (pstate, OP_AGGREGATE);
|
||
write_exp_elt_type (pstate, type);
|
||
write_exp_elt_longcst (pstate, 0);
|
||
write_exp_elt_opcode (pstate, OP_AGGREGATE);
|
||
}
|
||
else if (want_type || operation == top)
|
||
{
|
||
write_exp_elt_opcode (pstate, OP_TYPE);
|
||
write_exp_elt_type (pstate, type);
|
||
write_exp_elt_opcode (pstate, OP_TYPE);
|
||
}
|
||
else
|
||
error (_("Found type '%s', which can't be "
|
||
"evaluated in this context"),
|
||
varname);
|
||
}
|
||
}
|
||
break;
|
||
|
||
case OP_AGGREGATE:
|
||
{
|
||
int length;
|
||
rust_set_vector *fields = operation->right.field_inits;
|
||
struct type *type;
|
||
const char *name;
|
||
|
||
length = 0;
|
||
for (const set_field &init : *fields)
|
||
{
|
||
if (init.name.ptr != NULL)
|
||
{
|
||
write_exp_elt_opcode (pstate, OP_NAME);
|
||
write_exp_string (pstate, init.name);
|
||
write_exp_elt_opcode (pstate, OP_NAME);
|
||
++length;
|
||
}
|
||
|
||
convert_ast_to_expression (init.init, top);
|
||
++length;
|
||
|
||
if (init.name.ptr == NULL)
|
||
{
|
||
/* This is handled differently from Ada in our
|
||
evaluator. */
|
||
write_exp_elt_opcode (pstate, OP_OTHERS);
|
||
}
|
||
}
|
||
|
||
name = convert_name (operation->left.op);
|
||
type = rust_lookup_type (name, pstate->expression_context_block);
|
||
if (type == NULL)
|
||
error (_("Could not find type '%s'"), operation->left.sval.ptr);
|
||
|
||
if (type->code () != TYPE_CODE_STRUCT
|
||
|| rust_tuple_type_p (type)
|
||
|| rust_tuple_struct_type_p (type))
|
||
error (_("Struct expression applied to non-struct type"));
|
||
|
||
write_exp_elt_opcode (pstate, OP_AGGREGATE);
|
||
write_exp_elt_type (pstate, type);
|
||
write_exp_elt_longcst (pstate, length);
|
||
write_exp_elt_opcode (pstate, OP_AGGREGATE);
|
||
}
|
||
break;
|
||
|
||
case OP_STRING:
|
||
{
|
||
write_exp_elt_opcode (pstate, OP_STRING);
|
||
write_exp_string (pstate, operation->left.sval);
|
||
write_exp_elt_opcode (pstate, OP_STRING);
|
||
}
|
||
break;
|
||
|
||
case OP_RANGE:
|
||
{
|
||
enum range_type kind = BOTH_BOUND_DEFAULT;
|
||
|
||
if (operation->left.op != NULL)
|
||
{
|
||
convert_ast_to_expression (operation->left.op, top);
|
||
kind = HIGH_BOUND_DEFAULT;
|
||
}
|
||
if (operation->right.op != NULL)
|
||
{
|
||
convert_ast_to_expression (operation->right.op, top);
|
||
if (kind == BOTH_BOUND_DEFAULT)
|
||
kind = (operation->inclusive
|
||
? LOW_BOUND_DEFAULT : LOW_BOUND_DEFAULT_EXCLUSIVE);
|
||
else
|
||
{
|
||
gdb_assert (kind == HIGH_BOUND_DEFAULT);
|
||
kind = (operation->inclusive
|
||
? NONE_BOUND_DEFAULT : NONE_BOUND_DEFAULT_EXCLUSIVE);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/* Nothing should make an inclusive range without an upper
|
||
bound. */
|
||
gdb_assert (!operation->inclusive);
|
||
}
|
||
|
||
write_exp_elt_opcode (pstate, OP_RANGE);
|
||
write_exp_elt_longcst (pstate, kind);
|
||
write_exp_elt_opcode (pstate, OP_RANGE);
|
||
}
|
||
break;
|
||
|
||
default:
|
||
gdb_assert_not_reached ("unhandled opcode in convert_ast_to_expression");
|
||
}
|
||
}
|
||
|
||
|
||
|
||
/* The parser as exposed to gdb. */
|
||
|
||
int
|
||
rust_parse (struct parser_state *state)
|
||
{
|
||
int result;
|
||
|
||
/* This sets various globals and also clears them on
|
||
destruction. */
|
||
rust_parser parser (state);
|
||
|
||
result = rustyyparse (&parser);
|
||
|
||
if (!result || (state->parse_completion && parser.rust_ast != NULL))
|
||
parser.convert_ast_to_expression (parser.rust_ast, parser.rust_ast);
|
||
|
||
return result;
|
||
}
|
||
|
||
/* The parser error handler. */
|
||
|
||
static void
|
||
rustyyerror (rust_parser *parser, const char *msg)
|
||
{
|
||
const char *where = (parser->pstate->prev_lexptr
|
||
? parser->pstate->prev_lexptr
|
||
: parser->pstate->lexptr);
|
||
error (_("%s in expression, near `%s'."), msg, where);
|
||
}
|
||
|
||
|
||
|
||
#if GDB_SELF_TEST
|
||
|
||
/* Initialize the lexer for testing. */
|
||
|
||
static void
|
||
rust_lex_test_init (rust_parser *parser, const char *input)
|
||
{
|
||
parser->pstate->prev_lexptr = NULL;
|
||
parser->pstate->lexptr = input;
|
||
parser->paren_depth = 0;
|
||
}
|
||
|
||
/* A test helper that lexes a string, expecting a single token. It
|
||
returns the lexer data for this token. */
|
||
|
||
static RUSTSTYPE
|
||
rust_lex_test_one (rust_parser *parser, const char *input, int expected)
|
||
{
|
||
int token;
|
||
RUSTSTYPE result;
|
||
|
||
rust_lex_test_init (parser, input);
|
||
|
||
token = rustyylex (&result, parser);
|
||
SELF_CHECK (token == expected);
|
||
|
||
if (token)
|
||
{
|
||
RUSTSTYPE ignore;
|
||
token = rustyylex (&ignore, parser);
|
||
SELF_CHECK (token == 0);
|
||
}
|
||
|
||
return result;
|
||
}
|
||
|
||
/* Test that INPUT lexes as the integer VALUE. */
|
||
|
||
static void
|
||
rust_lex_int_test (rust_parser *parser, const char *input,
|
||
LONGEST value, int kind)
|
||
{
|
||
RUSTSTYPE result = rust_lex_test_one (parser, input, kind);
|
||
SELF_CHECK (result.typed_val_int.val == value);
|
||
}
|
||
|
||
/* Test that INPUT throws an exception with text ERR. */
|
||
|
||
static void
|
||
rust_lex_exception_test (rust_parser *parser, const char *input,
|
||
const char *err)
|
||
{
|
||
try
|
||
{
|
||
/* The "kind" doesn't matter. */
|
||
rust_lex_test_one (parser, input, DECIMAL_INTEGER);
|
||
SELF_CHECK (0);
|
||
}
|
||
catch (const gdb_exception_error &except)
|
||
{
|
||
SELF_CHECK (strcmp (except.what (), err) == 0);
|
||
}
|
||
}
|
||
|
||
/* Test that INPUT lexes as the identifier, string, or byte-string
|
||
VALUE. KIND holds the expected token kind. */
|
||
|
||
static void
|
||
rust_lex_stringish_test (rust_parser *parser, const char *input,
|
||
const char *value, int kind)
|
||
{
|
||
RUSTSTYPE result = rust_lex_test_one (parser, input, kind);
|
||
SELF_CHECK (result.sval.length == strlen (value));
|
||
SELF_CHECK (strncmp (result.sval.ptr, value, result.sval.length) == 0);
|
||
}
|
||
|
||
/* Helper to test that a string parses as a given token sequence. */
|
||
|
||
static void
|
||
rust_lex_test_sequence (rust_parser *parser, const char *input, int len,
|
||
const int expected[])
|
||
{
|
||
int i;
|
||
|
||
parser->pstate->lexptr = input;
|
||
parser->paren_depth = 0;
|
||
|
||
for (i = 0; i < len; ++i)
|
||
{
|
||
RUSTSTYPE ignore;
|
||
int token = rustyylex (&ignore, parser);
|
||
|
||
SELF_CHECK (token == expected[i]);
|
||
}
|
||
}
|
||
|
||
/* Tests for an integer-parsing corner case. */
|
||
|
||
static void
|
||
rust_lex_test_trailing_dot (rust_parser *parser)
|
||
{
|
||
const int expected1[] = { DECIMAL_INTEGER, '.', IDENT, '(', ')', 0 };
|
||
const int expected2[] = { INTEGER, '.', IDENT, '(', ')', 0 };
|
||
const int expected3[] = { FLOAT, EQEQ, '(', ')', 0 };
|
||
const int expected4[] = { DECIMAL_INTEGER, DOTDOT, DECIMAL_INTEGER, 0 };
|
||
|
||
rust_lex_test_sequence (parser, "23.g()", ARRAY_SIZE (expected1), expected1);
|
||
rust_lex_test_sequence (parser, "23_0.g()", ARRAY_SIZE (expected2),
|
||
expected2);
|
||
rust_lex_test_sequence (parser, "23.==()", ARRAY_SIZE (expected3),
|
||
expected3);
|
||
rust_lex_test_sequence (parser, "23..25", ARRAY_SIZE (expected4), expected4);
|
||
}
|
||
|
||
/* Tests of completion. */
|
||
|
||
static void
|
||
rust_lex_test_completion (rust_parser *parser)
|
||
{
|
||
const int expected[] = { IDENT, '.', COMPLETE, 0 };
|
||
|
||
parser->pstate->parse_completion = 1;
|
||
|
||
rust_lex_test_sequence (parser, "something.wha", ARRAY_SIZE (expected),
|
||
expected);
|
||
rust_lex_test_sequence (parser, "something.", ARRAY_SIZE (expected),
|
||
expected);
|
||
|
||
parser->pstate->parse_completion = 0;
|
||
}
|
||
|
||
/* Test pushback. */
|
||
|
||
static void
|
||
rust_lex_test_push_back (rust_parser *parser)
|
||
{
|
||
int token;
|
||
RUSTSTYPE lval;
|
||
|
||
rust_lex_test_init (parser, ">>=");
|
||
|
||
token = rustyylex (&lval, parser);
|
||
SELF_CHECK (token == COMPOUND_ASSIGN);
|
||
SELF_CHECK (lval.opcode == BINOP_RSH);
|
||
|
||
parser->push_back ('=');
|
||
|
||
token = rustyylex (&lval, parser);
|
||
SELF_CHECK (token == '=');
|
||
|
||
token = rustyylex (&lval, parser);
|
||
SELF_CHECK (token == 0);
|
||
}
|
||
|
||
/* Unit test the lexer. */
|
||
|
||
static void
|
||
rust_lex_tests (void)
|
||
{
|
||
int i;
|
||
|
||
/* Set up dummy "parser", so that rust_type works. */
|
||
struct parser_state ps (language_def (language_rust), target_gdbarch (),
|
||
nullptr, 0, 0, nullptr, 0, nullptr);
|
||
rust_parser parser (&ps);
|
||
|
||
rust_lex_test_one (&parser, "", 0);
|
||
rust_lex_test_one (&parser, " \t \n \r ", 0);
|
||
rust_lex_test_one (&parser, "thread 23", 0);
|
||
rust_lex_test_one (&parser, "task 23", 0);
|
||
rust_lex_test_one (&parser, "th 104", 0);
|
||
rust_lex_test_one (&parser, "ta 97", 0);
|
||
|
||
rust_lex_int_test (&parser, "'z'", 'z', INTEGER);
|
||
rust_lex_int_test (&parser, "'\\xff'", 0xff, INTEGER);
|
||
rust_lex_int_test (&parser, "'\\u{1016f}'", 0x1016f, INTEGER);
|
||
rust_lex_int_test (&parser, "b'z'", 'z', INTEGER);
|
||
rust_lex_int_test (&parser, "b'\\xfe'", 0xfe, INTEGER);
|
||
rust_lex_int_test (&parser, "b'\\xFE'", 0xfe, INTEGER);
|
||
rust_lex_int_test (&parser, "b'\\xfE'", 0xfe, INTEGER);
|
||
|
||
/* Test all escapes in both modes. */
|
||
rust_lex_int_test (&parser, "'\\n'", '\n', INTEGER);
|
||
rust_lex_int_test (&parser, "'\\r'", '\r', INTEGER);
|
||
rust_lex_int_test (&parser, "'\\t'", '\t', INTEGER);
|
||
rust_lex_int_test (&parser, "'\\\\'", '\\', INTEGER);
|
||
rust_lex_int_test (&parser, "'\\0'", '\0', INTEGER);
|
||
rust_lex_int_test (&parser, "'\\''", '\'', INTEGER);
|
||
rust_lex_int_test (&parser, "'\\\"'", '"', INTEGER);
|
||
|
||
rust_lex_int_test (&parser, "b'\\n'", '\n', INTEGER);
|
||
rust_lex_int_test (&parser, "b'\\r'", '\r', INTEGER);
|
||
rust_lex_int_test (&parser, "b'\\t'", '\t', INTEGER);
|
||
rust_lex_int_test (&parser, "b'\\\\'", '\\', INTEGER);
|
||
rust_lex_int_test (&parser, "b'\\0'", '\0', INTEGER);
|
||
rust_lex_int_test (&parser, "b'\\''", '\'', INTEGER);
|
||
rust_lex_int_test (&parser, "b'\\\"'", '"', INTEGER);
|
||
|
||
rust_lex_exception_test (&parser, "'z", "Unterminated character literal");
|
||
rust_lex_exception_test (&parser, "b'\\x0'", "Not enough hex digits seen");
|
||
rust_lex_exception_test (&parser, "b'\\u{0}'",
|
||
"Unicode escape in byte literal");
|
||
rust_lex_exception_test (&parser, "'\\x0'", "Not enough hex digits seen");
|
||
rust_lex_exception_test (&parser, "'\\u0'", "Missing '{' in Unicode escape");
|
||
rust_lex_exception_test (&parser, "'\\u{0", "Missing '}' in Unicode escape");
|
||
rust_lex_exception_test (&parser, "'\\u{0000007}", "Overlong hex escape");
|
||
rust_lex_exception_test (&parser, "'\\u{}", "Not enough hex digits seen");
|
||
rust_lex_exception_test (&parser, "'\\Q'", "Invalid escape \\Q in literal");
|
||
rust_lex_exception_test (&parser, "b'\\Q'", "Invalid escape \\Q in literal");
|
||
|
||
rust_lex_int_test (&parser, "23", 23, DECIMAL_INTEGER);
|
||
rust_lex_int_test (&parser, "2_344__29", 234429, INTEGER);
|
||
rust_lex_int_test (&parser, "0x1f", 0x1f, INTEGER);
|
||
rust_lex_int_test (&parser, "23usize", 23, INTEGER);
|
||
rust_lex_int_test (&parser, "23i32", 23, INTEGER);
|
||
rust_lex_int_test (&parser, "0x1_f", 0x1f, INTEGER);
|
||
rust_lex_int_test (&parser, "0b1_101011__", 0x6b, INTEGER);
|
||
rust_lex_int_test (&parser, "0o001177i64", 639, INTEGER);
|
||
rust_lex_int_test (&parser, "0x123456789u64", 0x123456789ull, INTEGER);
|
||
|
||
rust_lex_test_trailing_dot (&parser);
|
||
|
||
rust_lex_test_one (&parser, "23.", FLOAT);
|
||
rust_lex_test_one (&parser, "23.99f32", FLOAT);
|
||
rust_lex_test_one (&parser, "23e7", FLOAT);
|
||
rust_lex_test_one (&parser, "23E-7", FLOAT);
|
||
rust_lex_test_one (&parser, "23e+7", FLOAT);
|
||
rust_lex_test_one (&parser, "23.99e+7f64", FLOAT);
|
||
rust_lex_test_one (&parser, "23.82f32", FLOAT);
|
||
|
||
rust_lex_stringish_test (&parser, "hibob", "hibob", IDENT);
|
||
rust_lex_stringish_test (&parser, "hibob__93", "hibob__93", IDENT);
|
||
rust_lex_stringish_test (&parser, "thread", "thread", IDENT);
|
||
|
||
rust_lex_stringish_test (&parser, "\"string\"", "string", STRING);
|
||
rust_lex_stringish_test (&parser, "\"str\\ting\"", "str\ting", STRING);
|
||
rust_lex_stringish_test (&parser, "\"str\\\"ing\"", "str\"ing", STRING);
|
||
rust_lex_stringish_test (&parser, "r\"str\\ing\"", "str\\ing", STRING);
|
||
rust_lex_stringish_test (&parser, "r#\"str\\ting\"#", "str\\ting", STRING);
|
||
rust_lex_stringish_test (&parser, "r###\"str\\\"ing\"###", "str\\\"ing",
|
||
STRING);
|
||
|
||
rust_lex_stringish_test (&parser, "b\"string\"", "string", BYTESTRING);
|
||
rust_lex_stringish_test (&parser, "b\"\x73tring\"", "string", BYTESTRING);
|
||
rust_lex_stringish_test (&parser, "b\"str\\\"ing\"", "str\"ing", BYTESTRING);
|
||
rust_lex_stringish_test (&parser, "br####\"\\x73tring\"####", "\\x73tring",
|
||
BYTESTRING);
|
||
|
||
for (i = 0; i < ARRAY_SIZE (identifier_tokens); ++i)
|
||
rust_lex_test_one (&parser, identifier_tokens[i].name,
|
||
identifier_tokens[i].value);
|
||
|
||
for (i = 0; i < ARRAY_SIZE (operator_tokens); ++i)
|
||
rust_lex_test_one (&parser, operator_tokens[i].name,
|
||
operator_tokens[i].value);
|
||
|
||
rust_lex_test_completion (&parser);
|
||
rust_lex_test_push_back (&parser);
|
||
}
|
||
|
||
#endif /* GDB_SELF_TEST */
|
||
|
||
void _initialize_rust_exp ();
|
||
void
|
||
_initialize_rust_exp ()
|
||
{
|
||
int code = regcomp (&number_regex, number_regex_text, REG_EXTENDED);
|
||
/* If the regular expression was incorrect, it was a programming
|
||
error. */
|
||
gdb_assert (code == 0);
|
||
|
||
#if GDB_SELF_TEST
|
||
selftests::register_test ("rust-lex", rust_lex_tests);
|
||
#endif
|
||
}
|