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CSequence: frontOrDefault and backOrDefault taking the default value as an argument

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This commit is contained in:
Mathew Sutcliffe
2014-07-13 20:27:05 +01:00
parent e23e418797
commit bcac93f593
1 changed files with 12 additions and 2 deletions
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14
src/blackmisc/sequence.h
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@@ -153,6 +153,11 @@ namespace BlackMisc
*/
const_reference frontOrDefault() const { static const value_type def; return empty() ? def : front(); }
/*!
* \brief Access the first element, or a default-initialized value if the sequence is empty.
*/
value_type frontOrDefault(value_type def) const { return empty() ? def : front(); }
/*!
* \brief Access the last element.
* \pre The sequence must not be empty.
@@ -166,10 +171,15 @@ namespace BlackMisc
const_reference back() const { Q_ASSERT(!empty()); return pimpl()->back(); }
/*!
* \brief Access the last element, or a default-initialized value if the sequence is empty.
*/
* \brief Access the last element, or a default value if the sequence is empty.
*/
const_reference backOrDefault() const { static const value_type def; return empty() ? def : back(); }
/*!
* \brief Access the last element, or a default value if the sequence is empty.
*/
value_type backOrDefault(value_type def) const { return empty() ? def : back(); }
/*!
* \brief Returns number of elements in the sequence.
*/