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Dave Abrahams
120e0145ce
We're now one step away from eliminating bare pointers in semantic actions. There are plenty of other cleanups and modernizations that can be made in the parser, but the elimination of bare pointers is the one that has the highest impact for the codebase.
45 lines
1.4 KiB
C++
45 lines
1.4 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& inputFile) : inputFileName(inputFile) {}
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// Writes a syntax error diagnostic, containing message, for the input file at
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// the given line, to standard error.
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auto PrintDiagnostic(const std::string& message, int lineNumber) -> void;
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// The source range of the token being (or just) lex'd.
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yy::location currentTokenPosition;
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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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const std::string inputFileName;
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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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yy::parser::symbol_type yylex(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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