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Jon Meow
8fccecadeb
- Switch code to llvm::raw_ostream as part of standardizing output forms.
- Preferring llvm::raw_ostream over std::ostream because other tooling code should be expected to rely on llvm more closely, and an overall preference towards library consistency.
- There are a couple spots in syntax/ that still use std streams, but I'd prefer to take a separate PR to see how best to address those.
- std::boolalpha doesn't work with llvm, so I've implemented equivalent in a couple places (not enough that it felt like worth making a helper function).
- Implement Print(ostream) as consistently as we can, as an instance member.
- This facilitates the use of the common/ostream.h template to provide operators.
- Preferring this approach so that Print is easily accessible via gdb, per suggestion on #executable-semantics.
- Switch code currently calling `type->Print(ostream)` to instead do `ostream << *type`.
- Remove the unused `PrintTypeEnv`, nothing used it and the declaration didn't match the definition.
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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#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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// 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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std::variant<Carbon::AST, Carbon::SyntaxErrorCode> ast_or_error =
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Carbon::parse(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(&std::get<Carbon::AST>(ast_or_error));
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}
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