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https://github.com/carbon-language/carbon-lang.git
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Jon Meow
ed2d171703
Make the parser reentrant, working towards #769 and the ability to load other packages cleanly.
51 lines
1.6 KiB
C++
51 lines
1.6 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 EXECUTABLE_SEMANTICS_SYNTAX_DRIVER_H_
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#define EXECUTABLE_SEMANTICS_SYNTAX_DRIVER_H_
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#include <variant>
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#include "executable_semantics/ast/abstract_syntax_tree.h"
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#include "executable_semantics/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(const std::string& input_file)
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: input_file_name(global_arena->New<std::string>(input_file)) {}
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// Writes a syntax error diagnostic containing message to standard error.
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auto PrintDiagnostic(const std::string& message) -> void;
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auto SourceLoc() -> 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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// The source range of the token being (or just) lex'd.
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location current_token_position;
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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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Ptr<const std::string> input_file_name;
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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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Carbon::Parser::symbol_type yylex(yyscan_t yyscanner, \
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Carbon::ParseAndLexContext& context)
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// Declares yylex for the parser's sake.
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YY_DECL;
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#endif // EXECUTABLE_SYNTAX_DRIVER_H_
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