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//===--- ClangSourceBufferImporter.h - Map Clang buffers over ---*- C++ -*-===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2019 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
#ifndef SWIFT_CLANGIMPORTER_CLANGSOURCEBUFFERIMPORTER_H
#define SWIFT_CLANGIMPORTER_CLANGSOURCEBUFFERIMPORTER_H
#include "swift/Basic/LLVM.h"
#include "swift/Basic/SourceLoc.h"
#include "clang/Basic/SourceLocation.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/IntrusiveRefCntPtr.h"
#include "llvm/ADT/SmallVector.h"
namespace llvm {
class MemoryBuffer;
}
namespace clang {
class SourceManager;
}
namespace swift {
class SourceManager;
namespace importer {
/// A helper class used to keep alive the Clang source managers where
/// diagnostics have been reported.
///
/// This is a bit of a hack, but LLVM's source manager (and by extension
/// Swift's) does not support buffers going away, so if we want to report
/// diagnostics in them we have to do it this way.
class ClangSourceBufferImporter {
// This is not using SmallPtrSet or similar because we need the
// IntrusiveRefCntPtr to stay a ref-counting pointer.
SmallVector<llvm::IntrusiveRefCntPtr<const clang::SourceManager>, 4>
sourceManagersWithDiagnostics;
llvm::DenseMap<const char *, unsigned> mirroredBuffers;
SourceManager &swiftSourceManager;
public:
explicit ClangSourceBufferImporter(SourceManager &sourceMgr)
: swiftSourceManager(sourceMgr) {}
/// Returns a Swift source location that points into a Clang buffer.
///
/// This will keep the Clang buffer alive as long as this object.
SourceLoc resolveSourceLocation(const clang::SourceManager &clangSrcMgr,
clang::SourceLocation clangLoc);
};
} // end namespace importer
} // end namespace swift
#endif
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