mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-09-24 20:30:14 +01:00
Jon Ross-Perkins
acbe6530c3
What this really does is avoids shadowing names, so that we can comfortable have things like `Check::DiagnosticEmitter` or `Check::DiagnosticLoc` without shadowing being a concern. Note, down this path I'm also thinking about: - Renaming misc DiagnosticConsumer/DiagnosticEmitter classes, possibly just to DiagnosticConsumer/DiagnosticEmitter (so `Check::DiagnosticEmitter` instead of `SemIRLocDiagnosticEmitter`). - Dropping `Diagnostic` from `Emitter::DiagnosticBuilder`. - But not for `Check::DiagnosticBuilder`, because `Check::Builder` would be ambiguous. - Renaming diagnostics/diagnostic_* to drop "diagnostic". [Discussion about SemIRLoc -> DiagnosticLoc](https://discord.com/channels/655572317891461132/655578254970716160/1353771570463768698) reminded me of this (in particular the older [Check::DiagnosticBuilder discussion](https://discord.com/channels/655572317891461132/655578254970716160/1344363562608627763)), but I'd only do that rename if there's matching consensus about a path forward where we keep SemIRLoc, and in a way that it's only ever used for diagnostics (the divergence from which is at the root of current LocId discussion). I'm trying to keep that separate from a namespace addition for clarity.
76 lines
2.9 KiB
C++
76 lines
2.9 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 "toolchain/language_server/language_server.h"
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#include "clang-tools-extra/clangd/LSPBinder.h"
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#include "clang-tools-extra/clangd/Transport.h"
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#include "clang-tools-extra/clangd/support/Logger.h"
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#include "common/raw_string_ostream.h"
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#include "toolchain/diagnostics/diagnostic_emitter.h"
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#include "toolchain/language_server/context.h"
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#include "toolchain/language_server/incoming_messages.h"
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#include "toolchain/language_server/outgoing_messages.h"
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namespace Carbon::LanguageServer {
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// An adapter for clangd's logging that sends most messages to `error_stream`.
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// Verbose logging is only printed if `vlog_stream` is provided, and will be
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// sent there.
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class Logger : public clang::clangd::Logger {
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public:
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explicit Logger(llvm::raw_ostream* error_stream,
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llvm::raw_ostream* vlog_stream)
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: error_logger_(*error_stream, clang::clangd::Logger::Info),
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vlog_logger_(vlog_stream
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? std::make_unique<clang::clangd::StreamLogger>(
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*vlog_stream, clang::clangd::Logger::Verbose)
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: nullptr) {}
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auto log(Level level, const char* format,
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const llvm::formatv_object_base& message) -> void override {
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if (level != clang::clangd::Logger::Verbose) {
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error_logger_.log(level, format, message);
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} else if (vlog_logger_) {
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vlog_logger_->log(level, format, message);
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}
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}
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private:
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clang::clangd::StreamLogger error_logger_;
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std::unique_ptr<clang::clangd::StreamLogger> vlog_logger_;
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};
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auto Run(FILE* input_stream, llvm::raw_ostream& output_stream,
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llvm::raw_ostream& error_stream, llvm::raw_ostream* vlog_stream,
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Diagnostics::Consumer& consumer) -> bool {
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// The language server internally uses diagnostics for logging issues, but the
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// clangd parts have their own logging system. We intercept that here.
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Logger logger(&error_stream, vlog_stream);
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clang::clangd::LoggingSession logging_session(logger);
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// Set up the connection.
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std::unique_ptr<clang::clangd::Transport> transport(
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clang::clangd::newJSONTransport(input_stream, output_stream,
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/*InMirror=*/nullptr,
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/*Pretty=*/true));
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OutgoingMessages outgoing(transport.get());
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Context context(vlog_stream, &consumer, &outgoing);
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IncomingMessages incoming(transport.get(), &context);
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// Run the server loop.
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llvm::Error err = transport->loop(incoming);
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if (err) {
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RawStringOstream out;
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out << err;
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CARBON_DIAGNOSTIC(LanguageServerTransportError, Error, "{0}", std::string);
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Diagnostics::NoLocEmitter emitter(&consumer);
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emitter.Emit(LanguageServerTransportError, out.TakeStr());
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return false;
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}
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return true;
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}
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} // namespace Carbon::LanguageServer
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