forked from carbon-language/carbon-lang
-
Notifications
You must be signed in to change notification settings - Fork 0
/
parse_and_lex_context.h
66 lines (49 loc) · 2.14 KB
/
parse_and_lex_context.h
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
// Exceptions. See /LICENSE for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
#ifndef CARBON_EXPLORER_SYNTAX_PARSE_AND_LEX_CONTEXT_H_
#define CARBON_EXPLORER_SYNTAX_PARSE_AND_LEX_CONTEXT_H_
#include <variant>
#include "explorer/ast/ast.h"
#include "explorer/syntax/parser.h" // from parser.ypp
namespace Carbon {
// The state and functionality that is threaded "globally" through the
// lexing/parsing process.
class ParseAndLexContext {
public:
// Creates an instance analyzing the given input file.
ParseAndLexContext(Nonnull<const std::string*> input_file_name,
bool parser_debug)
: input_file_name_(input_file_name), parser_debug_(parser_debug) {}
// Formats ands records a lexing oor parsing error. Returns an error token as
// a convenience.
auto RecordSyntaxError(Error error) -> Parser::symbol_type;
auto RecordSyntaxError(const std::string& message) -> Parser::symbol_type;
auto source_loc() const -> SourceLocation {
return SourceLocation(input_file_name_,
static_cast<int>(current_token_position.begin.line));
}
auto parser_debug() const -> bool { return parser_debug_; }
// The source range of the token being (or just) lex'd.
location current_token_position;
auto take_errors() -> std::vector<Error> {
std::vector<Error> errors = std::move(errors_);
errors_.clear();
return errors;
}
private:
// A path to the file processed, relative to the current working directory
// when *this is called.
Nonnull<const std::string*> input_file_name_;
bool parser_debug_;
std::vector<Error> errors_;
};
} // namespace Carbon
// Gives flex the yylex prototype we want.
#define YY_DECL \
auto yylex(Carbon::Nonnull<Carbon::Arena*> /*arena*/, yyscan_t yyscanner, \
Carbon::ParseAndLexContext& context) \
->Carbon::Parser::symbol_type
// Declares yylex for the parser's sake.
YY_DECL;
#endif // CARBON_EXPLORER_SYNTAX_PARSE_AND_LEX_CONTEXT_H_