BloombergLP::bslfmt::FormatterBase_IsStdBasicString<std::basic_string<t_CHAR, t_TRAITS, t_ALLOCATOR>>

template<
    class t_CHAR,
    class t_TRAITS,
    class t_ALLOCATOR>
struct FormatterBase_IsStdBasicString<std::basic_string<t_CHAR, t_TRAITS, t_ALLOCATOR>>;