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//===-- Support/hash_set - "Portable" wrapper around hash_set ---*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by the LLVM research group and is distributed under
// the University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// vim:ft=cpp
//
// This file provides a wrapper around the mysterious <hash_set> header file
// that seems to move around between GCC releases into and out of namespaces at
// will. #including this header will cause hash_set to be available in the
// global namespace.
//
//===----------------------------------------------------------------------===//
#ifndef SUPPORT_HASH_SET
#define SUPPORT_HASH_SET
// Compiler Support Matrix
//
// Version Namespace Header File
// 2.95.x :: hash_set
// 3.0.4 std ext/hash_set
// 3.1 __gnu_cxx ext/hash_set
//
// GCC versions 3.1 and later put hash_set in <ext/hash_set> and in
// the __gnu_cxx namespace.
#if @HAVE_GNU_EXT_HASH_SET@
# include <ext/hash_set>
# ifndef HASH_NAMESPACE
# define HASH_NAMESPACE __gnu_cxx
# endif
// GCC 3.0.x puts hash_set in <ext/hash_set> and in the std namespace.
#elif @HAVE_STD_EXT_HASH_SET@
# include <ext/hash_set>
# ifndef HASH_NAMESPACE
# define HASH_NAMESPACE std
# endif
// Older compilers such as GCC before version 3.0 do not keep
// extensions in the `ext' directory, and ignore the `std' namespace.
#elif @HAVE_GLOBAL_HASH_SET@
# include <hash_set>
# ifndef HASH_NAMESPACE
# define HASH_NAMESPACE std
# endif
// Give a warning if we couldn't find it, instead of (or in addition to)
// randomly doing something dumb.
#else
# warning "Autoconfiguration failed to find the hash_set header file."
#endif
using HASH_NAMESPACE::hash_set;
using HASH_NAMESPACE::hash;
// Include vector because ext/hash_set includes stl_vector.h and leaves
// out specializations like stl_bvector.h, causing link conflicts.
#include <vector>
#include <Support/HashExtras.h>
#endif
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