Method parse_basic_string

src/toml.hpp:13454–13692

		TOML_NODISCARD
		TOML_NEVER_INLINE
		std::string_view parse_basic_string(bool multi_line)
		{
			return_if_error({});
			assert_not_eof();
			TOML_ASSERT_ASSUME(*cp == U'"');
			push_parse_scope("string"sv);

			// skip the '"'
			advance_and_return_if_error_or_eof({});

			// multi-line strings ignore a single line ending right at the beginning
			if (multi_line)
			{
				consume_line_break();
				return_if_error({});
				set_error_and_return_if_eof({});
			}

			auto& str = string_buffer;
			str.clear();
			bool escaped			 = false;
			bool skipping_whitespace = false;
			do
			{
				if (escaped)
				{
					escaped = false;

					// handle 'line ending slashes' in multi-line mode
					if (multi_line && is_whitespace(*cp))
					{
						consume_leading_whitespace();

						if TOML_UNLIKELY(!consume_line_break())
							set_error_and_return_default(
								"line-ending backslashes must be the last non-whitespace character on the line"sv);

						skipping_whitespace = true;
						return_if_error({});
						continue;
					}

					bool skip_escaped_codepoint = true;
					assert_not_eof();
					switch (const auto escaped_codepoint = *cp)
					{
						// 'regular' escape codes
						case U'b': str += '\b'; break;
						case U'f': str += '\f'; break;
						case U'n': str += '\n'; break;
						case U'r': str += '\r'; break;
						case U't': str += '\t'; break;
						case U'"': str += '"'; break;
						case U'\\': str += '\\'; break;

#if TOML_LANG_UNRELEASED // toml/pull/790 (\e shorthand for \x1B)
						case U'e': str += '\x1B'; break;
#else