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

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object::if_contains (1 of 2 overloads)

Return a pointer to the value if the key is found, or null.

Synopsis
value const*
if_contains(
    string_view key) const;
Description

This function searches for a value with the given key, and returns a pointer to it if found. Otherwise it returns null.

Example
if ( auto p = obj.if_contains( "key" ) )
    std::cout << *p;
Complexity

Constant on average, worst case linear in size().

Exception Safety

No-throw guarantee.

Parameters

Name

Description

key

The key of the element to find.

See Also

find


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