mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-11-13 06:06:27 +00:00
3a54b3dc87
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@62000 91177308-0d34-0410-b5e6-96231b3b80d8
77 lines
2.4 KiB
C++
77 lines
2.4 KiB
C++
//==-- llvm/ADT/iterator.h - Portable wrapper around <iterator> --*- C++ -*-==//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file provides a wrapper around the mysterious <iterator> header file.
|
|
// In GCC 2.95.3, the file defines a bidirectional_iterator class (and other
|
|
// friends), instead of the standard iterator class. In GCC 3.1, the
|
|
// bidirectional_iterator class got moved out and the new, standards compliant,
|
|
// iterator<> class was added. Because there is nothing that we can do to get
|
|
// correct behavior on both compilers, we have this header with #ifdef's. Gross
|
|
// huh?
|
|
//
|
|
// By #includ'ing this file, you get the contents of <iterator> plus the
|
|
// following classes in the global namespace:
|
|
//
|
|
// 1. bidirectional_iterator
|
|
// 2. forward_iterator
|
|
//
|
|
// The #if directives' expressions are filled in by Autoconf.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_ADT_ITERATOR_H
|
|
#define LLVM_ADT_ITERATOR_H
|
|
|
|
#include <iterator>
|
|
|
|
#undef HAVE_BI_ITERATOR
|
|
#undef HAVE_STD_ITERATOR
|
|
#undef HAVE_FWD_ITERATOR
|
|
|
|
#ifdef _MSC_VER
|
|
# define HAVE_BI_ITERATOR 0
|
|
# define HAVE_STD_ITERATOR 1
|
|
# define HAVE_FWD_ITERATOR 0
|
|
#endif
|
|
|
|
#if !HAVE_BI_ITERATOR
|
|
# if HAVE_STD_ITERATOR
|
|
/// If the bidirectional iterator is not defined, we attempt to define it in
|
|
/// terms of the C++ standard iterator. Otherwise, we import it with a "using"
|
|
/// statement.
|
|
///
|
|
template<class Ty, class PtrDiffTy>
|
|
struct bidirectional_iterator
|
|
: public std::iterator<std::bidirectional_iterator_tag, Ty, PtrDiffTy> {
|
|
};
|
|
# else
|
|
# error "Need to have standard iterator to define bidirectional iterator!"
|
|
# endif
|
|
#else
|
|
using std::bidirectional_iterator;
|
|
#endif
|
|
|
|
#if !HAVE_FWD_ITERATOR
|
|
# if HAVE_STD_ITERATOR
|
|
/// If the forward iterator is not defined, attempt to define it in terms of
|
|
/// the C++ standard iterator. Otherwise, we import it with a "using" statement.
|
|
///
|
|
template<class Ty, class PtrDiffTy>
|
|
struct forward_iterator
|
|
: public std::iterator<std::forward_iterator_tag, Ty, PtrDiffTy> {
|
|
};
|
|
# else
|
|
# error "Need to have standard iterator to define forward iterator!"
|
|
# endif
|
|
#else
|
|
using std::forward_iterator;
|
|
#endif
|
|
|
|
#endif // LLVM_ADT_ITERATOR_H
|