constexpr bool is_string() const noexcept;
This function returns #!cpp true
if and only if the JSON value is a string.
#!cpp true
if type is a string, #!cpp false
otherwise.
No-throw guarantee: this member function never throws exceptions.
Constant.
??? example
The following code exemplifies `is_string()` for all JSON types. ```cpp --8<-- "examples/is_string.cpp" ``` Output: ```json --8<-- "examples/is_string.output" ```