Remove the value on an element
Synopsis
Declared in header <boost/url/params_ref.hpp>
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.params().unset( u.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. |