Godeps/_workspace/src/gopkg.in/mgo.v2/bson/decode.go
func (d *decoder) readRegEx() RegEx {
	re := RegEx{}
	re.Pattern = d.readCStr()
	re.Options = d.readCStr()
	return re
}
func (d *decoder) readRegEx() RegEx {
	re := RegEx{}
	re.Pattern = d.readCStr()
	re.Options = d.readCStr()
	return re
}
// --------------------------------------------------------------------------
// Parsers of basic types.