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From c6755a399e8a31cbee5129dde5124f9c54a47ab6 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Nikola=20Forr=C3=B3?= <nforro@redhat.com>
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Date: Wed, 4 Apr 2018 14:58:03 +0200
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Subject: [PATCH] Do not call back() on an empty vector
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Calling std::vector::back() on an empty container is undefined.
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Avoid doing that, simply return pointer to the beginning in case
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the vector is empty.
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Signed-off-by: Nikola Forró <nforro@redhat.com>
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---
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common/vector.hpp | 6 +++---
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1 file changed, 3 insertions(+), 3 deletions(-)
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diff --git a/common/vector.hpp b/common/vector.hpp
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index 782e4b0..cb344bd 100644
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--- a/common/vector.hpp
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+++ b/common/vector.hpp
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@@ -36,13 +36,13 @@ namespace acommon
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}
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T * data() {return &*this->begin();}
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T * data(int pos) {return &*this->begin() + pos;}
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- T * data_end() {return &this->back()+1;}
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+ T * data_end() {return this->empty() ? &*this->begin() : &this->back()+1;}
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T * pbegin() {return &*this->begin();}
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- T * pend() {return &this->back()+1;}
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+ T * pend() {return this->empty() ? &*this->begin() : &this->back()+1;}
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const T * pbegin() const {return &*this->begin();}
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- const T * pend() const {return &this->back()+1;}
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+ const T * pend() const {return this->empty() ? &*this->begin() : &this->back()+1;}
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template <typename U>
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U * datap() {
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