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//===--- SimpleFormatContext.h ----------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
/// \file
///
/// Defines a utility class for use of clang-format in libclang
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_LIB_INDEX_SIMPLEFORMATCONTEXT_H
#define LLVM_CLANG_LIB_INDEX_SIMPLEFORMATCONTEXT_H
#include "clang/Basic/Diagnostic.h"
#include "clang/Basic/DiagnosticOptions.h"
#include "clang/Basic/FileManager.h"
#include "clang/Basic/LangOptions.h"
#include "clang/Basic/SourceManager.h"
#include "clang/Rewrite/Core/Rewriter.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/raw_ostream.h"
namespace clang {
namespace index {
/// A small class to be used by libclang clients to format
/// a declaration string in memory. This object is instantiated once
/// and used each time a formatting is needed.
class SimpleFormatContext {
public:
SimpleFormatContext(LangOptions Options)
: DiagOpts(new DiagnosticOptions()),
Diagnostics(new DiagnosticsEngine(new DiagnosticIDs, DiagOpts.get())),
InMemoryFileSystem(new llvm::vfs::InMemoryFileSystem),
Files(FileSystemOptions(), InMemoryFileSystem),
Sources(*Diagnostics, Files), Rewrite(Sources, Options) {
Diagnostics->setClient(new IgnoringDiagConsumer, true);
}
FileID createInMemoryFile(StringRef Name, StringRef Content) {
InMemoryFileSystem->addFile(Name, 0,
llvm::MemoryBuffer::getMemBuffer(Content));
const FileEntry *Entry = Files.getFile(Name);
assert(Entry != nullptr);
return Sources.createFileID(Entry, SourceLocation(), SrcMgr::C_User);
}
std::string getRewrittenText(FileID ID) {
std::string Result;
llvm::raw_string_ostream OS(Result);
Rewrite.getEditBuffer(ID).write(OS);
OS.flush();
return Result;
}
IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts;
IntrusiveRefCntPtr<DiagnosticsEngine> Diagnostics;
IntrusiveRefCntPtr<llvm::vfs::InMemoryFileSystem> InMemoryFileSystem;
FileManager Files;
SourceManager Sources;
Rewriter Rewrite;
};
} // end namespace index
} // end namespace clang
#endif
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