Function yaml_parser_scan_directive

scannerc.go:1622–1717

Scan a YAML-DIRECTIVE or TAG-DIRECTIVE token. Scope: %YAML 1.1 # a comment \n ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ %TAG !yaml! tag:yaml.org,2002: \n ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

(parser *yaml_parser_t, token *yaml_token_t)

//      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
//
func yaml_parser_scan_directive(parser *yaml_parser_t, token *yaml_token_t) bool {
	// Eat '%'.
	start_mark := parser.mark
	skip(parser)

	// Scan the directive name.
	var name []byte
	if !yaml_parser_scan_directive_name(parser, start_mark, &name) {
		return false
	}

	// Is it a YAML directive?
	if bytes.Equal(name, []byte("YAML")) {
		// Scan the VERSION directive value.
		var major, minor int8
		if !yaml_parser_scan_version_directive_value(parser, start_mark, &major, &minor) {
			return false
		}
		end_mark := parser.mark

		// Create a VERSION-DIRECTIVE token.
		*token = yaml_token_t{
			typ:        yaml_VERSION_DIRECTIVE_TOKEN,
			start_mark: start_mark,
			end_mark:   end_mark,
			major:      major,
			minor:      minor,
		}

		// Is it a TAG directive?
	} else if bytes.Equal(name, []byte("TAG")) {
		// Scan the TAG directive value.
		var handle, prefix []byte
		if !yaml_parser_scan_tag_directive_value(parser, start_mark, &handle, &prefix) {
			return false
		}
		end_mark := parser.mark

		// Create a TAG-DIRECTIVE token.
		*token = yaml_token_t{
			typ:        yaml_TAG_DIRECTIVE_TOKEN,
			start_mark: start_mark,
			end_mark:   end_mark,
			value:      handle,
			prefix:     prefix,
		}

		// Unknown directive.
	} else {
		yaml_parser_set_scanner_error(parser, "while scanning a directive",
			start_mark, "found unknown directive name")
		return false
	}

	// Eat the rest of the line including any comments.
	if parser.unread < 1 && !yaml_parser_update_buffer(parser, 1) {
		return false
	}