[llvm-commits] CVS: llvm/include/Support/iterator.in

[Brian Gaeke]

Changes in directory llvm/include/Support:

iterator.in added (r1.1)

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Log message:

Renamed from include/Support/iterator. Doxygenify comments; add autoconf substitution tags.

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Diffs of the changes:  (+66 -0)

Index: llvm/include/Support/iterator.in
diff -c /dev/null llvm/include/Support/iterator.in:1.1
*** /dev/null	Mon Feb 23 12:16:20 2004
--- llvm/include/Support/iterator.in	Mon Feb 23 12:16:10 2004
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*** 0 ****
--- 1,66 ----
+ //===-- Support/iterator - "Portable" wrapper around <iterator> -*- C++ -*-===//
+ // 
+ //                     The LLVM Compiler Infrastructure
+ //
+ // This file was developed by the LLVM research group and 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 SUPPORT_ITERATOR
+ #define SUPPORT_ITERATOR
+ 
+ #include <iterator>
+ 
+ #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