func yaml_parser_scan_anchor()

in yaml/scannerc.go [1796:1848]

• 36 lines of code
• 17 McCabe index (conditional complexity)

func yaml_parser_scan_anchor(parser *yaml_parser_t, token *yaml_token_t, typ yaml_token_type_t) bool {
	var s []byte

	// Eat the indicator character.
	start_mark := parser.mark
	skip(parser)

	// Consume the value.
	if parser.unread < 1 && !yaml_parser_update_buffer(parser, 1) {
		return false
	}

	for is_alpha(parser.buffer, parser.buffer_pos) {
		s = read(parser, s)
		if parser.unread < 1 && !yaml_parser_update_buffer(parser, 1) {
			return false
		}
	}

	end_mark := parser.mark

	/*
	 * Check if length of the anchor is greater than 0 and it is followed by
	 * a whitespace character or one of the indicators:
	 *
	 *      '?', ':', ',', ']', '}', '%', '@', '`'.
	 */

	if len(s) == 0 ||
		!(is_blankz(parser.buffer, parser.buffer_pos) || parser.buffer[parser.buffer_pos] == '?' ||
			parser.buffer[parser.buffer_pos] == ':' || parser.buffer[parser.buffer_pos] == ',' ||
			parser.buffer[parser.buffer_pos] == ']' || parser.buffer[parser.buffer_pos] == '}' ||
			parser.buffer[parser.buffer_pos] == '%' || parser.buffer[parser.buffer_pos] == '@' ||
			parser.buffer[parser.buffer_pos] == '`') {
		context := "while scanning an alias"
		if typ == yaml_ANCHOR_TOKEN {
			context = "while scanning an anchor"
		}
		yaml_parser_set_scanner_error(parser, context, start_mark,
			"did not find expected alphabetic or numeric character")
		return false
	}

	// Create a token.
	*token = yaml_token_t{
		typ:        typ,
		start_mark: start_mark,
		end_mark:   end_mark,
		value:      s,
	}

	return true
}