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//===--- GlobalSelector.h - Cross-translation-unit "token" for selectors --===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// GlobalSelector is a ASTContext-independent way to refer to selectors.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_INDEX_GLOBALSELECTOR_H
#define LLVM_CLANG_INDEX_GLOBALSELECTOR_H
#include "llvm/ADT/DenseMap.h"
#include <string>
namespace clang {
class ASTContext;
class Selector;
namespace idx {
class Program;
/// \brief A ASTContext-independent way to refer to selectors.
class GlobalSelector {
void *Val;
explicit GlobalSelector(void *val) : Val(val) { }
public:
GlobalSelector() : Val(0) { }
/// \brief Get the ASTContext-specific selector.
Selector getSelector(ASTContext &AST) const;
bool isValid() const { return Val != 0; }
bool isInvalid() const { return !isValid(); }
/// \brief Get a printable name for debugging purpose.
std::string getPrintableName() const;
/// \brief Get a GlobalSelector for the ASTContext-specific selector.
static GlobalSelector get(Selector Sel, Program &Prog);
void *getAsOpaquePtr() const { return Val; }
static GlobalSelector getFromOpaquePtr(void *Ptr) {
return GlobalSelector(Ptr);
}
friend bool operator==(const GlobalSelector &LHS, const GlobalSelector &RHS) {
return LHS.getAsOpaquePtr() == RHS.getAsOpaquePtr();
}
// For use in a std::map.
friend bool operator< (const GlobalSelector &LHS, const GlobalSelector &RHS) {
return LHS.getAsOpaquePtr() < RHS.getAsOpaquePtr();
}
// For use in DenseMap/DenseSet.
static GlobalSelector getEmptyMarker() { return GlobalSelector((void*)-1); }
static GlobalSelector getTombstoneMarker() {
return GlobalSelector((void*)-2);
}
};
} // namespace idx
} // namespace clang
namespace llvm {
/// Define DenseMapInfo so that GlobalSelectors can be used as keys in DenseMap
/// and DenseSets.
template<>
struct DenseMapInfo<clang::idx::GlobalSelector> {
static inline clang::idx::GlobalSelector getEmptyKey() {
return clang::idx::GlobalSelector::getEmptyMarker();
}
static inline clang::idx::GlobalSelector getTombstoneKey() {
return clang::idx::GlobalSelector::getTombstoneMarker();
}
static unsigned getHashValue(clang::idx::GlobalSelector);
static inline bool
isEqual(clang::idx::GlobalSelector LHS, clang::idx::GlobalSelector RHS) {
return LHS == RHS;
}
};
template <>
struct isPodLike<clang::idx::GlobalSelector> { static const bool value = true;};
} // end namespace llvm
#endif
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