std::erase, std::erase_if (std::basic_string)

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std::erase, std::erase_if (std::basic_string)

Defined in header <string>
template< class CharT, class Traits, class Alloc, class U >
void erase(std::basic_string<CharT,Traits,Alloc>& c, const U& value);
(1) (since C++20)
template< class CharT, class Traits, class Alloc, class Pred >
void erase_if(std::basic_string<CharT,Traits,Alloc>& c, Pred pred);
(2) (since C++20)

1) Erases all elements that compare equal to value from the container. Equivalent to c.erase(std::remove(c.begin(), c.end(), value), c.end());

2) Erases all elements that satisfy the predicate pred from the container. Equivalent to c.erase(std::remove_if(c.begin(), c.end(), pred), c.end());


c - container from which to erase
value - value to be removed
pred - unary predicate which returns ​true if the element should be erased.

The expression pred(v) must be convertible to bool for every argument v of type (possibly const) CharT, regardless of value category, and must not modify v. Thus, a parameter type of CharT&is not allowed, nor is CharT unless for CharT a move is equivalent to a copy (since C++11). ​




See also

removes elements satisfying specific criteria

(function template)

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