Boost C++ Libraries

...one of the most highly regarded and expertly designed C++ library projects in the world. Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

This is the documentation for a snapshot of the master branch, built from commit 9fc5439165.
PrevUpHomeNext
params_view::contains

(Inherited from params_base)

Return true if a matching key exists.

Synopsis
bool
contains(
    string_view key,
    ignore_case_param ic = {}) const;
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.

Example
assert( url_view( "?first=John&last=Doe" ).params().contains( "first" ) );
Complexity

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

Exception Safety

Throws nothing.

Parameters

Name

Description

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 will be case-insensitive.


PrevUpHomeNext