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 a pointer to the value if the key is found, or null.
value const* if_contains( string_view key) const;
This function searches for a value with the given key, and returns a pointer to it if found. Otherwise it returns null.
if( auto p = obj.if_contains( "key" ) ) std::cout << *p;
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. |