@Override
public Boolean visit(Neg ast) {
boolean checkArg = ast.getArg().accept(this);
if (!checkArg) return false;
Type argType = ast.getArg().typeOf(env);
if (!argType.isCompatibleToNumeric()) {
addToErrorList(
ast,
"the unary operator - can not be applied to instances of type " + argType.getClass());
return false;
}
return true;
}
// Unary Expressions
@Override
public Boolean visit(Neg exp) {
Expr unExpr = exp.getExpr();
if (!(unExpr.typeOf(environment) == new IntType())) {
errorMsgs.add(String.format("Neg expression is not numeric: %s", exp));
return false;
}
return unExpr.accept(this);
}