Class TOML_ABSTRACT_INTERFACE

src/toml.hpp:12310–12310

	static_assert(std::is_standard_layout_v<utf8_codepoint>);

	struct TOML_ABSTRACT_INTERFACE utf8_reader_interface
	{
		TOML_NODISCARD
		virtual const source_path_ptr& source_path() const noexcept = 0;