pub fn concatHandler<T: StartMarker + Clone>(
    c: Configuration<T>,
    v: Variables<'_, T>,
    data: Option<TokenStream>,
    t: TokenStream,
) -> Result<(Variables<'_, T>, TokenStream), (Variables<'_, T>, TokenStream)>Expand description
Concatenate two or more values together into a string.
Syntax: %(concat <v1> <v2>...)
Calls to_string method on values that are not string literals.