/**
* Classify an expression according to its numeric type. kind==0: not a number. kind==1: a
* non-real number kind==2: real number kind==3: floating-point kind==4: exact integer
*/
public static int classify(Type type) {
int kind = 0;
if (type instanceof PrimType) {
char sig = type.getSignature().charAt(0);
if (sig == 'V' || sig == 'Z' || sig == 'C') return 0;
else if (sig == 'D' || sig == 'F') return 3;
else return 4;
} else if (type.isSubtype(Arithmetic.typeIntNum)) return 4;
else if (type.isSubtype(Arithmetic.typeDFloNum)) return 3;
else if (type.isSubtype(Arithmetic.typeRealNum)) return 2;
else if (type.isSubtype(Arithmetic.typeNumeric)) return 1;
else return 0;
}
