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https://github.com/carbon-language/carbon-lang.git
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Dave AbrahamsandGeoff Romer
07a37933c6
Slowly bringing this into line with Bison's C++ example parser so we can use strong semantic values for symbols rather than leaking pointers. First step is to thread a `ParseAndLexContext` object through the whole syntactic analysis state, like the example has. In the example, it's called `driver`. Co-authored-by: Geoff Romer <gromer@google.com>
41 lines
1.3 KiB
C++
41 lines
1.3 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 char* message, int lineNumber) -> void;
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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 int 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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