params_encoded_ref::count

(Inherited from params_encoded_base)

Return the number of matching keys.

Synopsis

std::size_t
count(
    pct_string_view key,
    ignore_case_param ic = {}) const;

This function examines the parameters in the container to find the number of matches for the specified key, which may contain percent escapes. The comparison is performed as if all escaped characters were decoded first.

Example

assert( url_view( "?first=John&last=Doe" ).encoded_params().count( "first" ) == 1 );

Complexity

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

Exception Safety

Exceptions thrown on invalid input.

Exceptions

Type	Thrown On
`system_error`	`key` contains an invalid percent-encoding.

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.