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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>
39 lines
1.2 KiB
C++
39 lines
1.2 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/parse.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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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> quietOption("quiet", desc("Disable tracing"));
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opt<std::string> inputFileName(llvm::cl::Positional, desc("<input file>"),
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llvm::cl::Required);
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llvm::cl::ParseCommandLineOptions(argc, argv);
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if (quietOption) {
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Carbon::tracing_output = false;
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}
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std::variant<Carbon::AST, Carbon::SyntaxErrorCode> astOrError =
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Carbon::parse(inputFileName);
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if (auto* error = std::get_if<Carbon::SyntaxErrorCode>(&astOrError)) {
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// Diagnostic already reported to std::cerr; this is just a return code.
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return *error;
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}
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// Typecheck and run the parsed program.
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Carbon::ExecProgram(std::get<Carbon::AST>(astOrError));
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}
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