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Fix GitHub #83: ("Iterator zero incrementing leads to assert on empty vector")

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Ion Gaztañaga
2018-11-10 23:12:46 +01:00
parent 3afe49245f
commit 10a618afe8
2 changed files with 6 additions and 5 deletions
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1
doc/container.qbk
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@@ -1253,6 +1253,7 @@ use [*Boost.Container]? There are several reasons for that:
* Fixed bugs:
* [@https://github.com/boostorg/container/issues/82 GitHub #82: ['"Function definition in header file"]].
* [@https://github.com/boostorg/container/issues/83 GitHub #83: ['"Iterator zero incrementing leads to assert on empty vector"]].
* [@https://github.com/boostorg/container/pull/86 GitHub #86: ['"Add missing warning re-enabling include"]].
[endsect]

10
include/boost/container/vector.hpp
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@@ -145,19 +145,19 @@ class vec_iterator
//Arithmetic
BOOST_CONTAINER_FORCEINLINE vec_iterator& operator+=(difference_type off) BOOST_NOEXCEPT_OR_NOTHROW
{ BOOST_ASSERT(!!m_ptr); m_ptr += off; return *this; }
{ BOOST_ASSERT(m_ptr || !off); m_ptr += off; return *this; }
BOOST_CONTAINER_FORCEINLINE vec_iterator& operator-=(difference_type off) BOOST_NOEXCEPT_OR_NOTHROW
{ BOOST_ASSERT(!!m_ptr); m_ptr -= off; return *this; }
{ BOOST_ASSERT(m_ptr || !off); m_ptr -= off; return *this; }
BOOST_CONTAINER_FORCEINLINE friend vec_iterator operator+(const vec_iterator &x, difference_type off) BOOST_NOEXCEPT_OR_NOTHROW
{ BOOST_ASSERT(!!x.m_ptr); return vec_iterator(x.m_ptr+off); }
{ BOOST_ASSERT(x.m_ptr || !off); return vec_iterator(x.m_ptr+off); }
BOOST_CONTAINER_FORCEINLINE friend vec_iterator operator+(difference_type off, vec_iterator right) BOOST_NOEXCEPT_OR_NOTHROW
{ BOOST_ASSERT(!!right.m_ptr); right.m_ptr += off; return right; }
{ BOOST_ASSERT(right.m_ptr || !off); right.m_ptr += off; return right; }
BOOST_CONTAINER_FORCEINLINE friend vec_iterator operator-(vec_iterator left, difference_type off) BOOST_NOEXCEPT_OR_NOTHROW
{ BOOST_ASSERT(!!left.m_ptr); left.m_ptr -= off; return left; }
{ BOOST_ASSERT(left.m_ptr || !off); left.m_ptr -= off; return left; }
BOOST_CONTAINER_FORCEINLINE friend difference_type operator-(const vec_iterator &left, const vec_iterator& right) BOOST_NOEXCEPT_OR_NOTHROW
{ return left.m_ptr - right.m_ptr; }