SCValue* Fraction_eval(SCFraction* self) { SCFraction* frac = Fraction_copy(self); Fraction_simplify(frac); SCValue* ret; if (frac->denominator == 1) { ret = ValInt(frac->numerator); Fraction_free(frac); } else { ret = ValFrac(frac); } return ret; }
Value* Value_copy(const Value* val) { Value* ret; switch(val->type) { case VAL_INT: ret = ValInt(val->ival); break; case VAL_REAL: ret = ValReal(val->rval); break; case VAL_FRAC: ret = ValFrac(Fraction_copy(val->frac)); break; case VAL_EXPR: ret = ValExpr(BinOp_copy(val->expr)); break; case VAL_CALL: ret = ValCall(FuncCall_copy(val->call)); break; case VAL_UNARY: ret = ValUnary(UnOp_copy(val->term)); break; case VAL_VAR: ret = ValVar(val->name); break; case VAL_VEC: ret = ValVec(Vector_copy(val->vec)); break; case VAL_NEG: /* Shouldn't be reached, but so easy to code */ ret = ValNeg(); break; case VAL_ERR: ret = ValErr(Error_copy(val->err)); break; default: typeError("Unknown value type: %d.", val->type); ret = NULL; break; } return ret; }