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//===--- SyncAPI.cpp - Sync version of ClangdServer's API --------*- C++-*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "SyncAPI.h"
namespace clang {
namespace clangd {
void runAddDocument(ClangdServer &Server, PathRef File, StringRef Contents,
WantDiagnostics WantDiags) {
Server.addDocument(File, Contents, WantDiags);
if (!Server.blockUntilIdleForTest())
llvm_unreachable("not idle after addDocument");
}
namespace {
/// A helper that waits for async callbacks to fire and exposes their result in
/// the output variable. Intended to be used in the following way:
/// T Result;
/// someAsyncFunc(Param1, Param2, /*Callback=*/capture(Result));
template <typename T> struct CaptureProxy {
CaptureProxy(llvm::Optional<T> &Target) : Target(&Target) {
assert(!Target.hasValue());
}
CaptureProxy(const CaptureProxy &) = delete;
CaptureProxy &operator=(const CaptureProxy &) = delete;
// We need move ctor to return a value from the 'capture' helper.
CaptureProxy(CaptureProxy &&Other) : Target(Other.Target) {
Other.Target = nullptr;
}
CaptureProxy &operator=(CaptureProxy &&) = delete;
operator llvm::unique_function<void(T)>() && {
assert(!Future.valid() && "conversion to callback called multiple times");
Future = Promise.get_future();
return Bind(
[](std::promise<std::shared_ptr<T>> Promise, T Value) {
Promise.set_value(std::make_shared<T>(std::move(Value)));
},
std::move(Promise));
}
~CaptureProxy() {
if (!Target)
return;
assert(Future.valid() && "conversion to callback was not called");
assert(!Target->hasValue());
Target->emplace(std::move(*Future.get()));
}
private:
llvm::Optional<T> *Target;
// Using shared_ptr to workaround compilation errors with MSVC.
// MSVC only allows default-construcitble and copyable objects as future<>
// arguments.
std::promise<std::shared_ptr<T>> Promise;
std::future<std::shared_ptr<T>> Future;
};
template <typename T> CaptureProxy<T> capture(llvm::Optional<T> &Target) {
return CaptureProxy<T>(Target);
}
} // namespace
llvm::Expected<CodeCompleteResult>
runCodeComplete(ClangdServer &Server, PathRef File, Position Pos,
clangd::CodeCompleteOptions Opts) {
llvm::Optional<llvm::Expected<CodeCompleteResult>> Result;
Server.codeComplete(File, Pos, Opts, capture(Result));
return std::move(*Result);
}
llvm::Expected<SignatureHelp> runSignatureHelp(ClangdServer &Server,
PathRef File, Position Pos) {
llvm::Optional<llvm::Expected<SignatureHelp>> Result;
Server.signatureHelp(File, Pos, capture(Result));
return std::move(*Result);
}
llvm::Expected<std::vector<Location>>
runFindDefinitions(ClangdServer &Server, PathRef File, Position Pos) {
llvm::Optional<llvm::Expected<std::vector<Location>>> Result;
Server.findDefinitions(File, Pos, capture(Result));
return std::move(*Result);
}
llvm::Expected<std::vector<DocumentHighlight>>
runFindDocumentHighlights(ClangdServer &Server, PathRef File, Position Pos) {
llvm::Optional<llvm::Expected<std::vector<DocumentHighlight>>> Result;
Server.findDocumentHighlights(File, Pos, capture(Result));
return std::move(*Result);
}
llvm::Expected<std::vector<tooling::Replacement>>
runRename(ClangdServer &Server, PathRef File, Position Pos, StringRef NewName) {
llvm::Optional<llvm::Expected<std::vector<tooling::Replacement>>> Result;
Server.rename(File, Pos, NewName, capture(Result));
return std::move(*Result);
}
std::string runDumpAST(ClangdServer &Server, PathRef File) {
llvm::Optional<std::string> Result;
Server.dumpAST(File, capture(Result));
return std::move(*Result);
}
llvm::Expected<std::vector<SymbolInformation>>
runWorkspaceSymbols(ClangdServer &Server, StringRef Query, int Limit) {
llvm::Optional<llvm::Expected<std::vector<SymbolInformation>>> Result;
Server.workspaceSymbols(Query, Limit, capture(Result));
return std::move(*Result);
}
llvm::Expected<std::vector<SymbolInformation>>
runDocumentSymbols(ClangdServer &Server, PathRef File) {
llvm::Optional<llvm::Expected<std::vector<SymbolInformation>>> Result;
Server.documentSymbols(File, capture(Result));
return std::move(*Result);
}
} // namespace clangd
} // namespace clang
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