Method parse_value

src/toml.hpp:14662–15147

		}

		TOML_NODISCARD
		node_ptr parse_value()
		{
			return_if_error({});
			assert_not_eof();
			TOML_ASSERT_ASSUME(!is_value_terminator(*cp));
			push_parse_scope("value"sv);

			const depth_counter_scope depth_counter{ nested_values };
			if TOML_UNLIKELY(nested_values > max_nested_values)
				set_error_and_return_default("exceeded maximum nested value depth of "sv,
											 max_nested_values,
											 " (TOML_MAX_NESTED_VALUES)"sv);

			// check if it begins with some control character
			// (note that this will also fail for whitespace but we're assuming we've
			// called consume_leading_whitespace() before calling parse_value())
			if TOML_UNLIKELY(is_control_character(*cp))
				set_error_and_return_default("unexpected control character"sv);

			// underscores at the beginning
			else if (*cp == U'_')
				set_error_and_return_default("values may not begin with underscores"sv);

			const auto begin_pos = cp->position;
			node_ptr val;

			do
			{
				TOML_ASSERT_ASSUME(!is_control_character(*cp));
				TOML_ASSERT_ASSUME(*cp != U'_');

				// detect the value type and parse accordingly,
				// starting with value types that can be detected
				// unambiguously from just one character.

				val = parse_value_known_prefixes();
				return_if_error({});
				if (val)
					break;

				// value types from here down require more than one character to unambiguously identify
				// so scan ahead and collect a set of value 'traits'.
				enum TOML_CLOSED_FLAGS_ENUM value_traits : int
				{
					has_nothing	 = 0,
					has_digits	 = 1,
					has_b		 = 1 << 1, // as second char only (0b)
					has_e		 = 1 << 2, // only float exponents
					has_o		 = 1 << 3, // as second char only (0o)
					has_p		 = 1 << 4, // only hexfloat exponents
					has_t		 = 1 << 5,
					has_x		 = 1 << 6, // as second or third char only (0x, -0x, +0x)
					has_z		 = 1 << 7,
					has_colon	 = 1 << 8,
					has_plus	 = 1 << 9,
					has_minus	 = 1 << 10,
					has_dot		 = 1 << 11,