@Override
public Verification verifySelf() {
Verification result = Valid.create();
try {
Expression var = variableExpression();
if (var == null) {
result =
result.and(
new BasicProblem(this, "The assignment has no variable at the left-hand side"));
}
Expression value = getValue();
if (value == null) {
result =
result.and(
new BasicProblem(
this, "The assignment has no valid expression at the right-hand side"));
}
Type varType = var.getType();
Type exprType = value.getType();
if (!exprType.subtypeOf(varType)) {
result = result.and(new InvalidType(this, varType, exprType));
}
} catch (LookupException e) {
result =
result.and(
new BasicProblem(
this,
"The type of the expression is not assignable to the type of the variable."));
}
return result;
}
public InvalidType(Element element, Type varType, Type exprType) {
super(
element,
"The type of the left-hand side ("
+ exprType.getFullyQualifiedName()
+ ") is not assignable to a variable of type "
+ varType.getFullyQualifiedName());
}