object::if_contains

`object::if_contains`

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

value const*
if_contains(
    string_view key) const noexcept; (1)

value*
if_contains(
    string_view key) noexcept; (2)

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.

Name Description

Name	Description
`key`	The key of the element to find.

key

The key of the element to find.