Files
carbon-lang/toolchain/language_server/language_server.cpp
T
Jon Ross-PerkinsandGeoff Romer 4c4c4a4d2c Add RawStringOstream for slightly simpler streaming to strings (#4817)
This adds a RawStringOstream. Versus TestRawOstream, which is
consolidated over to RawStringOstream, it uses a string for storage
instead of a vector, mainly to support move-to-string semantics. Versus
llvm::raw_string_ostream, it owns the string and supports pwrite (which
is needed for driver and its fd_ostream compatibility requirement).

This converts most uses of llvm::raw_string_ostream, leaving behind a
few in InstNamer that explicitly cannot own the string, such as:

```
     llvm::raw_string_ostream(name)
          << "_" << tree.tokens().GetColumnNumber(token);
```

I have this as its own library so that it can use CHECK.

Yes this doesn't save much code, but it's code we repeatedly write.

---------

Co-authored-by: Geoff Romer <gromer@google.com>
2025-01-18 01:11:44 +00:00

39 lines
1.3 KiB
C++

// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
// Exceptions. See /LICENSE for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
#include "toolchain/language_server/language_server.h"
#include "clang-tools-extra/clangd/LSPBinder.h"
#include "clang-tools-extra/clangd/Transport.h"
#include "common/raw_string_ostream.h"
#include "toolchain/language_server/context.h"
#include "toolchain/language_server/incoming_messages.h"
#include "toolchain/language_server/outgoing_messages.h"
namespace Carbon::LanguageServer {
auto Run(std::FILE* input_stream, llvm::raw_ostream& output_stream)
-> ErrorOr<Success> {
// Set up the connection.
std::unique_ptr<clang::clangd::Transport> transport(
clang::clangd::newJSONTransport(input_stream, output_stream,
/*InMirror=*/nullptr,
/*Pretty=*/true));
Context context;
IncomingMessages incoming(transport.get(), &context);
OutgoingMessages outgoing(transport.get());
// Run the server loop.
llvm::Error err = transport->loop(incoming);
if (err) {
RawStringOstream out;
out << err;
return Error(out.TakeStr());
} else {
return Success();
}
}
} // namespace Carbon::LanguageServer