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