/** Type check the expression. */
public Node typeCheck(TypeChecker tc) throws SemanticException {
TypeSystem ts = tc.typeSystem();
if (!ts.isCastValid(expr.type(), castType.type())) {
throw new SemanticException(
"Cannot cast the expression of type \""
+ expr.type()
+ "\" to type \""
+ castType.type()
+ "\".",
position());
}
return type(castType.type());
}
public List throwTypes(TypeSystem ts) {
if (expr.type().isReference()) {
return Collections.singletonList(ts.ClassCastException());
}
return Collections.EMPTY_LIST;
}
public Node typeCheck(TypeChecker tc) throws SemanticException {
ETValueHolder vh = (ETValueHolder) ((csTypeSystem_c) tc.typeSystem()).getValueHolder();
if (!vh.isDynamicValue(((CSObjectType) obj.type()).getAliasName(), ETTYPE.MODE))
throw new SemanticException("Using argument must be dynamic", obj.position());
return this;
}
public Node typeCheck(TypeChecker tc) throws SemanticException {
JL5Call_c n = null;
JL5TypeSystem ts = (JL5TypeSystem) tc.typeSystem();
JL5Context c = (JL5Context) tc.context();
ReferenceType targetType = null;
List<Type> explicitTypeArgs = null;
List<Type> paramTypes = new ArrayList<Type>();
if (typeArguments != null && !typeArguments.isEmpty()) {
explicitTypeArgs = new ArrayList<Type>();
if (target() == null) {
// should not actually happen. grammar doesn't allow it
throw new SemanticException(
"Explicit target required when using explicit type arguments", position());
}
for (Iterator it = typeArguments().iterator(); it.hasNext(); ) {
explicitTypeArgs.add(((TypeNode) it.next()).type());
}
}
for (Iterator i = this.arguments().iterator(); i.hasNext(); ) {
Expr e = (Expr) i.next();
paramTypes.add(e.type());
}
JL5MethodInstance mi;
// JLS 15.12.1
if (target == null) {
return typeCheckNullTarget(tc, paramTypes, explicitTypeArgs);
} else {
targetType = this.findTargetType();
mi = ts.findJL5Method(targetType, name, paramTypes, explicitTypeArgs, c);
}
boolean staticContext = (this.target instanceof TypeNode);
if (staticContext && !mi.flags().isStatic()) {
throw new SemanticException(
"Cannot call non-static method "
+ this.name
+ " of "
+ targetType
+ " in static "
+ "context.",
this.position());
}
if (this.target instanceof Special
&& ((Special) this.target).kind() == Special.SUPER
&& mi.flags().isAbstract()) {
throw new SemanticException(
"Cannot call an abstract method " + "of the super class", this.position());
}
n = (JL5Call_c) this.methodInstance(mi).type(mi.returnType());
// n.checkConsistency(c);
return n;
}
/** Flatten complex expressions within the AST */
public Node leave(Node old, Node n, NodeVisitor v) {
if (n == noFlatten) {
noFlatten = null;
return n;
}
if (n instanceof Block) {
List l = (List) stack.removeFirst();
return ((Block) n).statements(l);
} else if (n instanceof Stmt && !(n instanceof LocalDecl)) {
List l = (List) stack.getFirst();
l.add(n);
return n;
} else if (n instanceof Expr
&& !(n instanceof Lit)
&& !(n instanceof Special)
&& !(n instanceof Local)) {
Expr e = (Expr) n;
if (e instanceof Assign) {
return n;
}
// create a local temp, initialized to the value of the complex
// expression
String name = newID();
LocalDecl def =
nf.LocalDecl(
e.position(), Flags.FINAL, nf.CanonicalTypeNode(e.position(), e.type()), name, e);
def = def.localInstance(ts.localInstance(e.position(), Flags.FINAL, e.type(), name));
List l = (List) stack.getFirst();
l.add(def);
// return the local temp instead of the complex expression
Local use = nf.Local(e.position(), name);
use = (Local) use.type(e.type());
use = use.localInstance(ts.localInstance(e.position(), Flags.FINAL, e.type(), name));
return use;
}
return n;
}
public Type childExpectedType(Expr child, AscriptionVisitor av) {
TypeSystem ts = av.typeSystem();
if (child == cond) {
return ts.Boolean();
}
return child.type();
}
public ConstructorCall mangledCall(ConstructorCall cc, AJNodeFactory nf, AJTypeSystem ts) {
if (flags().isPrivate() || flags.isPackage()) {
Expr nl = nf.NullLit(cc.position());
nl = nl.type(mangleType);
List args = new LinkedList(cc.arguments());
args.add(nl);
ConstructorCall nc = (ConstructorCall) cc.arguments(args);
return nc.constructorInstance(mangled());
} else return cc;
}
public Type childExpectedType(Expr child, AscriptionVisitor av) {
TypeSystem ts = av.typeSystem();
if (child == expr) {
if (castType.type().isReference()) {
return ts.Object();
} else if (castType.type().isNumeric()) {
return ts.Double();
} else if (castType.type().isBoolean()) {
return ts.Boolean();
}
}
return child.type();
}
/** Type check the statement. */
public Node typeCheck(TypeChecker tc) throws SemanticException {
TypeSystem ts = tc.typeSystem();
// Check that all initializers have the same type.
// This should be enforced by the parser, but check again here,
// just to be sure.
Type t = null;
for (Iterator i = inits.iterator(); i.hasNext(); ) {
ForInit s = (ForInit) i.next();
if (s instanceof LocalDecl) {
LocalDecl d = (LocalDecl) s;
Type dt = d.type().type();
if (t == null) {
t = dt;
} else if (!t.equals(dt)) {
throw new InternalCompilerError(
"Local variable "
+ "declarations in a for loop initializer must all "
+ "be the same type, in this case "
+ t
+ ", not "
+ dt
+ ".",
d.position());
}
}
}
if (cond != null && !ts.isImplicitCastValid(cond.type(), ts.Boolean())) {
throw new SemanticException(
"The condition of a for statement must have boolean type.", cond.position());
}
return this;
}
/** Type check the expression. */
public Node typeCheck(ContextVisitor tc) {
return type(result == null ? tc.typeSystem().Void() : result.type());
}
private Node translateExtForArray(ExtendedFor n, List<String> labels) throws SemanticException {
Position pos = Position.compilerGenerated();
Type iteratedType = n.decl().type().type();
// translate "L1,...,Ln: for (C x: e) b" to
// "{ C[] arr = e; int iter = 0; L1,...,Ln: while (iter < arr.length) { C x = arr[iter]; b ;
// iter = iter + 1; }"
List<Stmt> stmts = new ArrayList<Stmt>();
// add the declaration of arr: "C[] arr = e"
Id arrID = freshName("arr");
LocalInstance arrLI = ts.localInstance(pos, Flags.NONE, n.expr().type(), arrID.id());
{
LocalDecl ld =
nodeFactory()
.LocalDecl(
pos, Flags.NONE, nodeFactory().CanonicalTypeNode(pos, arrLI.type()), arrID);
ld = ld.localInstance(arrLI);
ld = ld.init(n.expr());
stmts.add(ld);
}
// add the declaration of iterator: "int iter = 0"
Id iterID = freshName("iter");
LocalInstance iterLI = ts.localInstance(pos, Flags.NONE, ts.Int(), iterID.id());
{
LocalDecl ld =
nodeFactory()
.LocalDecl(
pos, Flags.NONE, nodeFactory().CanonicalTypeNode(pos, iterLI.type()), iterID);
ld = ld.localInstance(iterLI);
ld = ld.init(nodeFactory().IntLit(pos, IntLit.INT, 0).type(ts.Int()));
stmts.add(ld);
}
// build the conditional "iter < arr.length"
Expr cond;
{
Local iterLocal =
(Local) nodeFactory().Local(pos, iterID).localInstance(iterLI).type(ts.Int());
Local arrLocal =
(Local) nodeFactory().Local(pos, arrID).localInstance(arrLI).type(arrLI.type());
Id id = nodeFactory().Id(pos, "length");
Field field = (Field) nodeFactory().Field(pos, arrLocal, id).type(ts.Int());
field = field.fieldInstance(ts.findField(arrLI.type().toReference(), "length"));
cond = nodeFactory().Binary(pos, iterLocal, Binary.LT, field).type(ts.Boolean());
}
// build the initlizer for the local decl: arr[iter]
Expr init;
{
Local iterLocal =
(Local) nodeFactory().Local(pos, iterID).localInstance(iterLI).type(ts.Int());
Local arrLocal =
(Local) nodeFactory().Local(pos, arrID).localInstance(arrLI).type(arrLI.type());
init = nodeFactory().ArrayAccess(pos, arrLocal, iterLocal);
init = init.type(iteratedType);
}
// build the increment for iter (iter = iter + 1;)
Stmt inc;
{
Local iterLocal =
(Local) nodeFactory().Local(pos, iterID).localInstance(iterLI).type(ts.Int());
Expr incExpr =
nodeFactory()
.Binary(
pos,
iterLocal.type(ts.Int()),
Binary.ADD,
nodeFactory().IntLit(pos, IntLit.INT, 1).type(ts.Int()))
.type(ts.Int());
Assign incStore =
(Assign) nodeFactory().Assign(pos, iterLocal, Assign.ASSIGN, incExpr).type(ts.Int());
inc = nodeFactory().Eval(pos, incStore);
}
// build the while loop
{
// Create a new loop body from the old body followed by the increment
Block loopBody = nodeFactory().Block(pos, n.decl().init(init), n.body(), inc);
While loop = nodeFactory().While(pos, cond, loopBody);
stmts.add(labelStmt(loop, labels));
}
return nodeFactory().Block(pos, stmts);
}
private Node unbox(Expr expr) {
Position pos = Position.compilerGenerated(null);
return xnf.X10Cast(
pos, xnf.CanonicalTypeNode(pos, expr.type()), expr, Converter.ConversionType.UNBOXING)
.type(expr.type());
}