1 //===-- Support/hash_map - "Portable" wrapper around hash_map ---*- C++ -*-===//
3 // This file provides a wrapper around the mysterious <hash_map> header file
4 // that seems to move around between GCC releases into and out of namespaces at
5 // will. #including this header will cause hash_map to be available in the
8 //===----------------------------------------------------------------------===//
10 #ifndef SUPPORT_HASH_MAP
11 #define SUPPORT_HASH_MAP
13 // Compiler Support Matrix
15 // Version Namespace Header File
17 // 3.0.4 std ext/hash_map
18 // 3.1 __gnu_cxx ext/hash_map
21 #include "Config/config.h"
23 #ifdef HAVE_GNU_EXT_HASH_MAP
24 // This is for GCC-3.1+ which puts hash in ext/hash_map
25 #include <ext/hash_map>
26 #define HASH_NAMESPACE __gnu_cxx
30 // This is for GCC-3.0.x which puts hashmap in the `ext' directory.
31 #ifdef HAVE_STD_EXT_HASH_MAP
32 #include <ext/hash_map>
33 #define HASH_NAMESPACE std
36 // This handles older, pre-3.0 GCC which do not have the extentions in the `ext'
37 // directory, and ignore the `std' namespace.
39 #define HASH_NAMESPACE std
44 using HASH_NAMESPACE::hash_map;
45 using HASH_NAMESPACE::hash_multimap;
46 using HASH_NAMESPACE::hash;
48 // Include vector because ext/hash_map includes stl_vector.h and leaves
49 // out specializations like stl_bvector.h, causing link conflicts.
52 #include <Support/HashExtras.h>