Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Return true
if the key is found.
bool
contains(
string_view key) const noexcept;
This function returns true
if a key with the specified string is found.
return this->find(key) != this->end();
Constant on average, worst case linear in size().
No-throw guarantee.
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Name |
Description |
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The key of the element to find. |