boost::urls::params_ref::unset

Remove the value on an element

Synopsis

Declared in <include/boost/url/params_ref.hpp>

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.

url u( "?first=John&last=Doe" );

u.params().unset( u.params().begin() );

assert( u.encoded_query() == "first&last=Doe" );

Linear in `this‐>url().encoded_query().size()`.

Throws nothing.

Return Value

An iterator to the element.

Parameters

Name Description

pos

An iterator to the element&period;

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