Amebis/wxWidgets
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Fix off-by-one bug in wxVector::reverse_iterator::base()

Browse Source 
This is embarrassing, but the iterator returned by this method seems to
have always been wrong, ever since it was added back in 946954d3bf
(Added reverse iterator to wxVector<T>, 2008-09-16). Moreover, it was
also broken in its const_reverse_iterator counterpart where it was
copy-and-pasted in f7ef20685f (Add wxVector<>::const_reverse_iterator,
2013-05-08).

Finally fix this to return the correct value and add at least a simple
unit test check that this method behaves as expected.
This commit is contained in:
Vadim Zeitlin
2020-07-11 19:00:38 +02:00
parent 885ef5819e
commit 5495389db5
2 changed files with 6 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
include/wx/vector.h
View File

@@ -198,7 +198,7 @@ public:
reference operator*() const { return *m_ptr; }
pointer operator->() const { return m_ptr; }
iterator base() const { return m_ptr; }
iterator base() const { return m_ptr + 1; }
reverse_iterator& operator++()
{ --m_ptr; return *this; }
@@ -261,7 +261,7 @@ public:
const_reference operator*() const { return *m_ptr; }
const_pointer operator->() const { return m_ptr; }
const_iterator base() const { return m_ptr; }
const_iterator base() const { return m_ptr + 1; }
const_reverse_iterator& operator++()
{ --m_ptr; return *this; }

4
tests/vectors/vectors.cpp
View File

@@ -334,6 +334,10 @@ TEST_CASE("wxVector::reverse_iterator", "[vector][reverse_iterator]")
CHECK( ri < re );
CHECK( ri <= re );
CHECK( rb.base() == v.end() );
CHECK( re.base() == v.begin() );
CHECK( *ri.base() == 9 );
#if wxUSE_STD_CONTAINERS_COMPATIBLY
std::vector<int> stdvec(rb, re);
REQUIRE( stdvec.size() == 10 );