Function parseName

reflectx/reflect.go:282–320

parseName parses the tag and the target name for the given field using the tagName (eg 'json' for `json:"foo"` tags), mapFunc for mapping the field's name to a target name, and tagMapFunc for mapping the tag to a target name.

(field reflect.StructField, tagName string, mapFunc, tagMapFunc mapf)

// field's name to a target name, and tagMapFunc for mapping the tag to
// a target name.
func parseName(field reflect.StructField, tagName string, mapFunc, tagMapFunc mapf) (tag, fieldName string) {
	// first, set the fieldName to the field's name
	fieldName = field.Name
	// if a mapFunc is set, use that to override the fieldName
	if mapFunc != nil {
		fieldName = mapFunc(fieldName)
	}

	// if there's no tag to look for, return the field name
	if tagName == "" {
		return "", fieldName
	}

	// if this tag is not set using the normal convention in the tag,
	// then return the fieldname..  this check is done because according
	// to the reflect documentation:
	//    If the tag does not have the conventional format,
	//    the value returned by Get is unspecified.
	// which doesn't sound great.
	if !strings.Contains(string(field.Tag), tagName+":") {
		return "", fieldName
	}

	// at this point we're fairly sure that we have a tag, so lets pull it out
	tag = field.Tag.Get(tagName)

	// if we have a mapper function, call it on the whole tag
	// XXX: this is a change from the old version, which pulled out the name
	// before the tagMapFunc could be run, but I think this is the right way
	if tagMapFunc != nil {
		tag = tagMapFunc(tag)
	}

	// finally, split the options from the name
	parts := strings.Split(tag, ",")
	fieldName = parts[0]

	return tag, fieldName
}

// parseOptions parses options out of a tag string, skipping the name
func parseOptions(tag string) map[string]string {