private boolean isLiteral(String fullDatatype) {
		Matcher m = LITERAL_NUMBER_PATTERN.matcher(fullDatatype);
		return m.matches();
	}
This method converts each parameter string into
actual DemangledDataType objects.
Ghidra/Features/GnuDemangler/src/main/java/ghidra/app/util/demangler/gnu/GnuDemanglerParser.java