mirror of
https://github.com/carbon-language/carbon-lang.git
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Dave Abrahams
2f83c4be48
This change caused the syntax error in undef2.6c ("fun" instead of "fn") to be
detected as one would expect, thus the changed golden file.
56 lines
1.6 KiB
C++
56 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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#include <cstdio>
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#include <cstring>
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#include <iostream>
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#include "executable_semantics/syntax/parser.h"
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#include "executable_semantics/syntax/syntax_helpers.h"
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#include "executable_semantics/tracing_flag.h"
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#include "llvm/Support/CommandLine.h"
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extern FILE* yyin;
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int main(int argc, char* argv[]) {
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// yydebug = 1;
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using llvm::cl::desc;
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using llvm::cl::opt;
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opt<bool> quiet_option("quiet", desc("Disable tracing"));
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opt<std::string> input_filename(llvm::cl::Positional, desc("<input file>"));
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llvm::cl::ParseCommandLineOptions(argc, argv);
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if (input_filename.getNumOccurrences() > 0) {
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Carbon::input_filename = input_filename.c_str();
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yyin = fopen(input_filename.c_str(), "r");
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if (yyin == nullptr) {
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std::cerr << "Error opening '" << input_filename
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<< "': " << strerror(errno) << std::endl;
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return 1;
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}
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}
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if (quiet_option) {
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Carbon::tracing_output = false;
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}
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// No AST yet
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std::optional<Carbon::AST> parsedInput = std::nullopt;
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// Parse and handle syntax errors
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auto syntaxErrorCode = yyparse(parsedInput);
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if (syntaxErrorCode != 0) {
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return syntaxErrorCode;
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}
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if (parsedInput == std::nullopt) {
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std::cerr << "Internal error: parser validated syntax yet didn't produce "
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"an AST.\n";
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return 1;
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}
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// Typecheck and run the parsed program.
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Carbon::ExecProgram(*parsedInput);
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}
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