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Implement comparisons between wxString::iterator and const_iterator.

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Only comparisons between const_iterator and iterator worked before (because of
implicit conversion from the latter to the former), implement the ones in the
other direction explicitly now.

Closes #12594.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@65857 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
This commit is contained in:
Vadim Zeitlin
2010-10-21 19:22:33 +00:00
parent 53cdd2c11d
commit bdb40fa63e
2 changed files with 56 additions and 0 deletions
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30
include/wx/string.h
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@@ -1004,6 +1004,16 @@ public:
iterator operator-(ptrdiff_t n) const
{ return iterator(str(), wxStringOperations::AddToIter(m_cur, -n)); }
// Normal iterators need to be comparable with the const_iterators so
// declare the comparison operators and implement them below after the
// full const_iterator declaration.
bool operator==(const const_iterator& i) const;
bool operator!=(const const_iterator& i) const;
bool operator<(const const_iterator& i) const;
bool operator>(const const_iterator& i) const;
bool operator<=(const const_iterator& i) const;
bool operator>=(const const_iterator& i) const;
private:
iterator(wxString *wxstr, underlying_iterator ptr)
: m_cur(ptr), m_node(wxstr, &m_cur) {}
@@ -1048,6 +1058,11 @@ public:
const_iterator operator-(ptrdiff_t n) const
{ return const_iterator(str(), wxStringOperations::AddToIter(m_cur, -n)); }
// Notice that comparison operators taking non-const iterator are not
// needed here because of the implicit conversion from non-const iterator
// to const ones ensure that the versions for const_iterator declared
// inside WX_STR_ITERATOR_IMPL can be used.
private:
// for internal wxString use only:
const_iterator(const wxString *wxstr, underlying_iterator ptr)
@@ -4046,6 +4061,21 @@ inline bool operator!=(const wxString& s, const wxUniCharRef& c) { return !s.IsS
inline bool operator!=(const wxString& s, char c) { return !s.IsSameAs(c); }
inline bool operator!=(const wxString& s, wchar_t c) { return !s.IsSameAs(c); }
// wxString iterators comparisons
inline bool wxString::iterator::operator==(const const_iterator& i) const
{ return i == *this; }
inline bool wxString::iterator::operator!=(const const_iterator& i) const
{ return i != *this; }
inline bool wxString::iterator::operator<(const const_iterator& i) const
{ return i > *this; }
inline bool wxString::iterator::operator>(const const_iterator& i) const
{ return i < *this; }
inline bool wxString::iterator::operator<=(const const_iterator& i) const
{ return i >= *this; }
inline bool wxString::iterator::operator>=(const const_iterator& i) const
{ return i <= *this; }
// comparison with C string in Unicode build
#if wxUSE_UNICODE