1 //===-- Support/hash_map - "Portable" wrapper around hash_map ---*- C++ -*-===//
4 // This file provides a wrapper around the mysterious <hash_map> header file
5 // that seems to move around between GCC releases into and out of namespaces at
6 // will. #including this header will cause hash_map to be available in the
9 //===----------------------------------------------------------------------===//
11 #ifndef SUPPORT_HASH_MAP
12 #define SUPPORT_HASH_MAP
14 // Compiler Support Matrix
16 // Version Namespace Header File
18 // 3.0.4 std ext/hash_map
19 // 3.1 __gnu_cxx ext/hash_map
22 #include "Config/config.h"
24 #ifdef HAVE_GNU_EXT_HASH_MAP
25 // This is for GCC-3.1+ which puts hash in ext/hash_map
26 #include <ext/hash_map>
27 #define HASH_NAMESPACE __gnu_cxx
31 // This is for GCC-3.0.x which puts hashmap in the `ext' directory.
32 #ifdef HAVE_STD_EXT_HASH_MAP
33 #include <ext/hash_map>
34 #define HASH_NAMESPACE std
37 // This handles older, pre-3.0 GCC which do not have the extentions in the `ext'
38 // directory, and ignore the `std' namespace.
40 #define HASH_NAMESPACE std
45 using HASH_NAMESPACE::hash_map;
46 using HASH_NAMESPACE::hash_multimap;
47 using HASH_NAMESPACE::hash;
49 // Include vector because ext/hash_map includes stl_vector.h and leaves
50 // out specializations like stl_bvector.h, causing link conflicts.
53 #include <Support/HashExtras.h>