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https://github.com/carbon-language/carbon-lang.git
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Jon Meow
90f04700e2
With this, only main.cpp instantiates an arena. Maybe we'll want to split that up more later (e.g., so that the runtime interpreter uses its own arena), but given the intent to have type-checking update the AST, I thought this was a reasonable approach for now in order to avoid ownership complexities. Fixes #769
45 lines
1.5 KiB
C++
45 lines
1.5 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/common/tracing_flag.h"
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#include "executable_semantics/interpreter/exec_program.h"
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#include "executable_semantics/syntax/parse.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/InitLLVM.h"
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int main(int argc, char* argv[]) {
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llvm::InitLLVM(argc, argv);
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// Printing to stderr should flush stdout. This is most noticeable when stderr
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// is piped to stdout.
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llvm::errs().tie(&llvm::outs());
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using llvm::cl::desc;
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using llvm::cl::opt;
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opt<bool> trace_option("trace", desc("Enable tracing"));
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opt<std::string> input_file_name(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 (trace_option) {
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Carbon::tracing_output = true;
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}
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Carbon::Arena arena;
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std::variant<Carbon::AST, Carbon::SyntaxErrorCode> ast_or_error =
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Carbon::Parse(PtrTo(arena), input_file_name);
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if (auto* error = std::get_if<Carbon::SyntaxErrorCode>(&ast_or_error)) {
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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(PtrTo(arena), std::get<Carbon::AST>(ast_or_error));
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}
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