mirror of
https://github.com/carbon-language/carbon-lang.git
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Richard Smith
7a67715ac5
This allows us to combine multiple Errors together without repeating the prefix information. Also fixes several cases where two "COMPILATION ERROR" prefixes would be prepended to the same message when errors with prefixes and locations were produced by the lexer and parser.
67 lines
2.1 KiB
C++
67 lines
2.1 KiB
C++
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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// Exceptions. See /LICENSE for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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#ifndef CARBON_EXPLORER_SYNTAX_PARSE_AND_LEX_CONTEXT_H_
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#define CARBON_EXPLORER_SYNTAX_PARSE_AND_LEX_CONTEXT_H_
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#include <variant>
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#include "explorer/ast/ast.h"
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#include "explorer/syntax/parser.h" // from parser.ypp
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namespace Carbon {
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// The state and functionality that is threaded "globally" through the
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// lexing/parsing process.
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class ParseAndLexContext {
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public:
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// Creates an instance analyzing the given input file.
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ParseAndLexContext(Nonnull<const std::string*> input_file_name,
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bool parser_debug)
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: input_file_name_(input_file_name), parser_debug_(parser_debug) {}
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// Formats ands records a lexing oor parsing error. Returns an error token as
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// a convenience.
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auto RecordSyntaxError(Error error) -> Parser::symbol_type;
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auto RecordSyntaxError(const std::string& message) -> Parser::symbol_type;
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auto source_loc() const -> SourceLocation {
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return SourceLocation(input_file_name_,
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static_cast<int>(current_token_position.begin.line));
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}
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auto parser_debug() const -> bool { return parser_debug_; }
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// The source range of the token being (or just) lex'd.
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location current_token_position;
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auto take_errors() -> std::vector<Error> {
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std::vector<Error> errors = std::move(errors_);
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errors_.clear();
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return errors;
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}
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private:
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// A path to the file processed, relative to the current working directory
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// when *this is called.
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Nonnull<const std::string*> input_file_name_;
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bool parser_debug_;
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std::vector<Error> errors_;
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};
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} // namespace Carbon
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// Gives flex the yylex prototype we want.
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#define YY_DECL \
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auto yylex(Carbon::Nonnull<Carbon::Arena*> arena, yyscan_t yyscanner, \
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Carbon::ParseAndLexContext& context) \
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->Carbon::Parser::symbol_type
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// Declares yylex for the parser's sake.
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YY_DECL;
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#endif // CARBON_EXPLORER_SYNTAX_PARSE_AND_LEX_CONTEXT_H_
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