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Make iterator access functions on span constexpr (#612)

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As per feedback on span received during the C++ standardization discussions.
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Neil MacIntosh 2018-02-10 21:11:08 -08:00 committed by GitHub
parent 87e22faa7e
commit c23d17a61a
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1 changed files with 8 additions and 8 deletions
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16
include/gsl/span
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@ -482,17 +482,17 @@ public:
constexpr pointer data() const GSL_NOEXCEPT { return storage_.data(); }
// [span.iter], span iterator support
iterator begin() const GSL_NOEXCEPT { return {this, 0}; }
iterator end() const GSL_NOEXCEPT { return {this, length()}; }
constexpr iterator begin() const GSL_NOEXCEPT { return {this, 0}; }
constexpr iterator end() const GSL_NOEXCEPT { return {this, length()}; }
const_iterator cbegin() const GSL_NOEXCEPT { return {this, 0}; }
const_iterator cend() const GSL_NOEXCEPT { return {this, length()}; }
constexpr const_iterator cbegin() const GSL_NOEXCEPT { return {this, 0}; }
constexpr const_iterator cend() const GSL_NOEXCEPT { return {this, length()}; }
reverse_iterator rbegin() const GSL_NOEXCEPT { return reverse_iterator{end()}; }
reverse_iterator rend() const GSL_NOEXCEPT { return reverse_iterator{begin()}; }
constexpr reverse_iterator rbegin() const GSL_NOEXCEPT { return reverse_iterator{end()}; }
constexpr reverse_iterator rend() const GSL_NOEXCEPT { return reverse_iterator{begin()}; }
const_reverse_iterator crbegin() const GSL_NOEXCEPT { return const_reverse_iterator{cend()}; }
const_reverse_iterator crend() const GSL_NOEXCEPT { return const_reverse_iterator{cbegin()}; }
constexpr const_reverse_iterator crbegin() const GSL_NOEXCEPT { return const_reverse_iterator{cend()}; }
constexpr const_reverse_iterator crend() const GSL_NOEXCEPT { return const_reverse_iterator{cbegin()}; }
private:
// this implementation detail class lets us take advantage of the