Find a matching key

Synopsis

Declared in header <boost/url/params_base.hpp>

iterator
find_last(
    iterator before,
    core::string_view key,
    ignore_case_param ic = = {}) const noexcept;

Description

This function examines the parameters in the container to find a match for the specified key. The comparison is performed as if all escaped characters were decoded first.

The search starts prior to before and proceeds backwards until either the key is found or the beginning of the range is reached, in which case end() is returned.

Example

url_view u( "?First=John&Last=Doe" );

assert( u.params().find_last( "last" ) != u.params().find_last( "last", ignore_case ) );

Complexity

Linear in this->buffer().size().

Return Value

an iterator to the param

Parameters

Name Description

before

One past the position to begin the search from. This can be end().

key

The key to match. By default, a case-sensitive comparison is used.

ic

An optional parameter. If the value ignore_case is passed here, the comparison is case-insensitive.