public boolean isNumeric(String defName) {
		PPToken token = defs.get(defName);
		if (token == null) {
			return false;
		}
		return (token.kind == PreProcessorConstants.NUMERIC ||
			token.kind == PreProcessorConstants.FP_NUMERIC);
	}
Check if the token that defined this define was numeric

@param defName
@return
Ghidra/Features/Base/src/main/java/ghidra/app/util/cparser/CPP/DefineTable.java