Remove the value on an element

Synopsis

iterator
unset(iterator pos) noexcept;

Description

This function removes the value of an element at the specified position. After the call returns, has_value for the element is false.

All iterators that are equal to pos or come after are invalidated.

Example

url u( "?first=John&last=Doe" ); u.encoded_params().unset( u.encoded_params().begin() ); assert( u.encoded_query() == "first&last=Doe" );

Complexity

Linear in this->url().encoded_query().size().

Exception Safety

Throws nothing.

Return Value

An iterator to the element.

Parameters

Name	Description
pos	An iterator to the element.