params_encoded_ref::set (1 of 2 overloads)

Set a value.

iterator
set(
    iterator pos,
    pct_string_view value);

This function replaces the value of an element at the specified position.

All iterators that are equal to pos or come after are invalidated.

The string passed in must not come from the element being replaced, or else the behavior is undefined.

url u( "?id=42&id=69" );

u.encoded_params().set( u.encoded_params().begin(), "none" );

assert( u.encoded_query() == "id=none&id=69" );

Linear in this->url().encoded_query().size().

Strong guarantee. Calls to allocate may throw. Exceptions thrown on invalid input.

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

An iterator to the element.

Name	Description
`pos`	An iterator to the element.
`value`	The value to assign. The empty string still counts as a value. That is, `has_value` for the element is true.