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Implement wxVector::reverse_iterator::operator-()

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Make wxVector reverse iterators (and const versions of them) more
compatible with the std::vector ones.
This commit is contained in:
Vadim Zeitlin
2017-11-18 16:32:31 +01:00
parent 5669e8dbe9
commit 25a7c70631
2 changed files with 24 additions and 0 deletions
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20
tests/vectors/vectors.cpp
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@@ -331,3 +331,23 @@ TEST_CASE("wxVector::operator==", "[vector][compare]")
v2.push_back("baz");
CHECK( v1 != v2 );
}
TEST_CASE("wxVector::reverse_iterator", "[vector][reverse_iterator]")
{
wxVector<int> v;
for ( int i = 0; i < 10; ++i )
v.push_back(i + 1);
const wxVector<int>::reverse_iterator rb = v.rbegin();
const wxVector<int>::reverse_iterator re = v.rend();
CHECK( re - rb == 10 );
wxVector<int>::reverse_iterator ri = rb;
++ri;
CHECK( ri - rb == 1 );
CHECK( re - ri == 9 );
ri = rb + 2;
CHECK( ri - rb == 2 );
CHECK( re - ri == 8 );
}