1 //===-- Support/hash_set - "Portable" wrapper around hash_set ---*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by the LLVM research group and is distributed under
6 // the University of Illinois Open Source License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
11 // This file provides a wrapper around the mysterious <hash_set> header file
12 // that seems to move around between GCC releases into and out of namespaces at
13 // will. #including this header will cause hash_set to be available in the
16 //===----------------------------------------------------------------------===//
18 #ifndef SUPPORT_HASH_SET
19 #define SUPPORT_HASH_SET
21 // Compiler Support Matrix
23 // Version Namespace Header File
25 // 3.0.4 std ext/hash_set
26 // 3.1 __gnu_cxx ext/hash_set
29 #include "Config/config.h"
31 #ifdef HAVE_GNU_EXT_HASH_SET
33 // This is for GCC-3.1+ which puts hashset in ext/hash_set
34 #include <ext/hash_set>
35 #define HASH_NAMESPACE __gnu_cxx
39 // This is for GCC-3.0.x which puts hashmap in the `ext' directory.
40 #ifdef HAVE_STD_EXT_HASH_SET
41 #include <ext/hash_set>
42 #define HASH_NAMESPACE std
45 // This handles older, pre-3.0 GCC which do not have the extentions in the `ext'
46 // directory, and ignore the `std' namespace.
48 #define HASH_NAMESPACE std
53 using HASH_NAMESPACE::hash_set;
54 using HASH_NAMESPACE::hash;
56 // Include vector because ext/hash_set includes stl_vector.h and leaves
57 // out specializations like stl_bvector.h, causing link conflicts.
60 #include <Support/HashExtras.h>