param_view::param_view (2 of 5 overloads)

Constructor.

Synopsis

param_view(
    string_view key,
    std::nullptr_t);

This constructs a parameter with a key and no value. No validation is performed on the strings. The new key will reference the same underlying character buffer. Ownership of the buffers is not transferred; the caller is responsible for ensuring that the assigned buffers remain valid until they are no longer referenced.

Example

param_view qp( "key" );

Postconditions

this->key.data() == key.data() && this->value == "" && this->has_value == false

Complexity

Constant.

Exception Safety

Throws nothing.

Parameters

Name	Description
`key`	The key to set.