ITraitVisitor declareVariable(
VariableNode varNode,
DefinitionBase varDef,
boolean is_static,
boolean is_const,
Object initializer) {
final ICompilerProject project = this.classScope.getProject();
Name var_name = varDef.getMName(project);
TypeDefinitionBase typeDef = varDef.resolveType(project);
Name var_type = typeDef != null ? typeDef.getMName(project) : null;
int trait_kind = is_const ? TRAIT_Const : TRAIT_Var;
LexicalScope ls = is_static ? this.classStaticScope : this.classScope;
ls.declareVariableName(var_name);
ITraitVisitor tv =
ls.traitsVisitor.visitSlotTrait(
trait_kind, var_name, ITraitsVisitor.RUNTIME_SLOT, var_type, initializer);
if (!is_static)
if (varDef.getNamespaceReference()
instanceof NamespaceDefinition.IProtectedNamespaceDefinition)
this.iinfo.flags |= ABCConstants.CLASS_FLAG_protected;
SemanticUtils.checkScopedToDefaultNamespaceProblem(
this.classScope, varNode, varDef, this.className.getBaseName());
return tv;
}
public BURMPatternMatchFailureProblem(IASNode site) {
super(site, "");
node = SemanticUtils.getDiagnosticString(site);
}
/**
* This method performs the semantic analysis of a function declared in a class.
*
* @param node the FunctionNode to semantically analyze
*/
void functionSemanticChecks(FunctionNode node) {
verifyFunctionModifiers(node);
FunctionDefinition func = node.getDefinition();
Collection<ICompilerProblem> problems = classScope.getProblems();
// code model has some peculiar ideas about what makes a function a constructor or not
boolean looks_like_ctor = func.isConstructor();
looks_like_ctor |=
func.getBaseName() != null
&& this.className != null
&& func.getBaseName().equals(this.className.getBaseName());
if (!looks_like_ctor && (func.getBaseName() != null)) {
SemanticUtils.checkScopedToDefaultNamespaceProblem(
classScope, node, func, this.classDefinition.getQualifiedName());
}
if (looks_like_ctor) {
// If a constructor has a namespace as part of it's declaration, it must be declared public.
// It is ok to omit the namespace
// We must check the AST, as CM treats all ctors as public no matter what the user typed in
// so the FunctionDefinition will always be in the public namespace
if (node.getActualNamespaceNode() != null
&& node.getActualNamespaceNode().getName() != IASKeywordConstants.PUBLIC)
problems.add(new ConstructorMustBePublicProblem(node.getActualNamespaceNode()));
// A constructor cannot be static
if (func.isStatic()) problems.add(new ConstructorIsStaticProblem(node));
// A constructor cannot declare a return type, other than void.
IExpressionNode returnTypeExpression = node.getReturnTypeNode();
if (returnTypeExpression != null) {
// We cannot check whether node.resolveReturnType() returns the definition
// for the void type, because the return type of a constructor is considered
// to be the class of the object being constructed, rather than void.
// So instead we simply check whether the type annotation was void.
boolean returnTypeIsVoid = false;
if (returnTypeExpression instanceof ILanguageIdentifierNode) {
LanguageIdentifierKind kind = ((ILanguageIdentifierNode) returnTypeExpression).getKind();
if (kind == LanguageIdentifierKind.VOID) returnTypeIsVoid = true;
}
if (!returnTypeIsVoid) {
ICompilerProblem problem =
new ConstructorCannotHaveReturnTypeProblem(returnTypeExpression);
problems.add(problem);
}
}
// Is it a getter or setter that appears to be the constructor?
if (func instanceof IAccessorDefinition)
problems.add(new ConstructorIsGetterSetterProblem(node.getNameExpressionNode()));
} else if (!func.isStatic()) {
// We have to find the (potentially) overriden function whether we are an override or
// not/
FunctionDefinition override = func.resolveOverriddenFunction(classScope.getProject());
if (func.isOverride()) {
if (override == null) {
// Didn't find the function we are supposed to be overriding
problems.add(new OverrideNotFoundProblem(node.getNameExpressionNode()));
} else {
if (!func.hasCompatibleSignature(override, classScope.getProject())) {
// Signatures didn't match
problems.add(new IncompatibleOverrideProblem(node.getNameExpressionNode()));
}
if (override.isFinal()) {
// overriding final
problems.add(new OverrideFinalProblem(node.getNameExpressionNode()));
}
}
} else if (override != null) {
// found overriden function, but function not marked as override
problems.add(new FunctionNotMarkedOverrideProblem(node.getNameExpressionNode()));
}
}
}
/** Declare a variable. */
@Override
void declareVariable(VariableNode var) {
verifyVariableModifiers(var);
VariableDefinition varDef = (VariableDefinition) var.getDefinition();
boolean is_static = var.hasModifier(ASModifier.STATIC);
boolean is_const = SemanticUtils.isConst(var, classScope.getProject());
final ICompilerProject project = this.classScope.getProject();
ICodeGenerator codeGenerator = classScope.getGenerator();
IExpressionNode assignedValueNode = var.getAssignedValueNode();
IConstantValue constantValue = codeGenerator.generateConstantValue(assignedValueNode, project);
// initializer is null if no constant value
// can be generated, and null is the correct value for "no value."
Object initializer = constantValue != null ? constantValue.getValue() : null;
// Reducing the constant value may have produced problems in the
// LexicalScope used for constant reduction. Transfer them over
// to the LexicalScope for this class.
Collection<ICompilerProblem> problems =
constantValue != null ? constantValue.getProblems() : null;
if (problems != null) classScope.addProblems(problems);
final MethodBodySemanticChecker checker =
MethodBodySemanticCheckerFactory.getChecker(this.classScope); // CO-5148
DefinitionBase varType = (DefinitionBase) varDef.resolveType(project);
Object transformed_initializer = null;
if ((initializer != null) && (varType != null)) {
transformed_initializer =
checker
.checkInitialValue(
var,
new Binding(null, varType.getMName(this.classScope.getProject()), varType),
new PooledValue(initializer))
.getValue();
} else {
transformed_initializer = initializer;
}
ITraitVisitor tv = declareVariable(var, varDef, is_static, is_const, transformed_initializer);
if (is_static) this.classStaticScope.processMetadata(tv, getAllMetaTags(varDef));
else this.classScope.processMetadata(tv, getAllMetaTags(varDef));
tv.visitEnd();
// Generate variable initializers and append them to the
// proper initialization list.
if (transformed_initializer == null && var.getAssignedValueNode() != null) {
// Emit initialization instructions for non-static vars. Static var
// instructions will be emitted during finishClassDefinition()
if (is_static) staticVariableInitializers.add(var);
else generateInstructions(var, false);
} else {
checker.checkClassField(var, is_static);
// Massive kludge -- grovel over chained variable decls and add them one by one
for (int i = 0; i < var.getChildCount(); i++) {
IASNode candidate = var.getChild(i);
if (candidate instanceof VariableNode) {
declareVariable((VariableNode) candidate);
}
}
}
}
/**
* Constructor. Initializes the ClassDirectiveProcessor and its associated AET data structures.
*
* @param node - the AST that starts the class' definition in source; used for diagnostics.
* @param class_definition - the class' definition
* @param enclosing_scope - the immediately enclosing lexical scope.
* @param emitter - the active ABC emitter.
*/
ClassDirectiveProcessor(
ICommonClassNode node,
ClassDefinition class_definition,
LexicalScope enclosing_scope,
IABCVisitor emitter) {
super(enclosing_scope.getProblems());
this.emitter = emitter;
this.definitionSource = node;
assert (this.definitionSource != null) : "Class definition AST must be provided.";
this.classScope = enclosing_scope.pushFrame();
this.classStaticScope = enclosing_scope.pushFrame();
if (node.getNodeID() == ASTNodeID.ClassID) {
classScope.setInitialControlFlowRegionNode(((ClassNode) node).getScopedNode());
classStaticScope.setInitialControlFlowRegionNode(((ClassNode) node).getScopedNode());
}
ICompilerProject project = classScope.getProject();
// Set the class Name.
this.classDefinition = class_definition;
this.className = classDefinition.getMName(project);
iinfo.name = className;
// Check for a duplicate class name.
switch (SemanticUtils.getMultiDefinitionType(this.classDefinition, project)) {
case AMBIGUOUS:
classScope.addProblem(
new DuplicateClassDefinitionProblem(node, class_definition.getBaseName()));
break;
case NONE:
break;
default:
assert false; // I don't think classes can have other type of multiple definitions
}
if (node instanceof BaseDefinitionNode) // test doesn't work for MXML, which is OK.
{
BaseDefinitionNode n = (BaseDefinitionNode) node;
SemanticUtils.checkScopedToDefaultNamespaceProblem(classScope, n, classDefinition, null);
}
// Resolve the super class, checking that it exists,
// that it is a class rather than an interface,
// that it isn't final, and that it isn't the same as this class.
ClassDefinition superclassDefinition =
SemanticUtils.resolveBaseClass(node, class_definition, project, classScope.getProblems());
// Check that the superclass isn't a forward reference, but only need to do this if both
// definitions come from the same containing source. getContainingFilePath() returns the file
// from the ASFileScope, so no need to worry about included files.
if (!classDefinition.isGeneratedEmbedClass()
&& classDefinition
.getContainingFilePath()
.equals(superclassDefinition.getContainingFilePath())) {
// If the absolute offset in the class is less than the
// offset of the super class, it must be a forward reference in the file
int classOffset = classDefinition.getAbsoluteStart();
int superClassOffset = superclassDefinition.getAbsoluteEnd();
if (classOffset < superClassOffset)
classScope.addProblem(
new ForwardReferenceToBaseClassProblem(node, superclassDefinition.getQualifiedName()));
}
// Set the superclass Name.
this.superclassName = superclassDefinition.getMName(project);
iinfo.superName = superclassName;
// Resolve the interfaces.
IInterfaceDefinition[] interfaces =
classDefinition.resolveImplementedInterfaces(project, classScope.getProblems());
// Set the interface Names.
int n_interfaces = interfaces.length;
ArrayList<Name> interface_names = new ArrayList<Name>(n_interfaces);
for (int i = 0; i < n_interfaces; i++) {
InterfaceDefinition idef = (InterfaceDefinition) interfaces[i];
if (idef != null) {
Name interfaceName = ((InterfaceDefinition) interfaces[i]).getMName(project);
interface_names.add(interfaceName);
}
}
iinfo.interfaceNames = interface_names.toArray(new Name[interface_names.size()]);
// Set the flags corresponding to 'final' and 'dynamic'.
if (classDefinition.isFinal()) iinfo.flags |= ABCConstants.CLASS_FLAG_final;
if (!classDefinition.isDynamic()) iinfo.flags |= ABCConstants.CLASS_FLAG_sealed;
iinfo.protectedNs =
((NamespaceDefinition) classDefinition.getProtectedNamespaceReference()).getAETNamespace();
this.cv = emitter.visitClass(iinfo, cinfo);
cv.visit();
this.itraits = cv.visitInstanceTraits();
this.ctraits = cv.visitClassTraits();
this.classScope.traitsVisitor = this.itraits;
this.classStaticScope.traitsVisitor = this.ctraits;
// Build an array of the names of all the ancestor classes.
ArrayList<Name> ancestorClassNames = new ArrayList<Name>();
// Walk the superclass chain, starting with this class
// and (unless there are problems) ending with Object.
// This will accomplish three things:
// - find loops;
// - build the array of names of ancestor classes;
// - set the needsProtected flag if this class or any of its ancestor classes needs it.
boolean needsProtected = false;
// Remember the most recently examined class in case there's a cycle in the superclass
// chain, in which case we'll need it to issue a diagnostic.
ClassDefinition c = null;
IClassDefinition.IClassIterator classIterator = classDefinition.classIterator(project, true);
while (classIterator.hasNext()) {
c = (ClassDefinition) classIterator.next();
needsProtected |= c.getOwnNeedsProtected();
if (c != classDefinition) ancestorClassNames.add(c.getMName(project));
}
// Report a loop in the superclass chain, such as A extends B and B extends A.
// Note: A extends A was found previously by SemanticUtils.resolveBaseClass().
if (classIterator.foundLoop())
classScope.addProblem(new CircularTypeReferenceProblem(c, c.getQualifiedName()));
// In the case of class A extends A, ancestorClassNames will be empty at this point.
// Change it to be Object to prevent "Warning: Stack underflow" in the script init code below.
if (ancestorClassNames.isEmpty()) {
ClassDefinition objectDefinition =
(ClassDefinition) project.getBuiltinType(IASLanguageConstants.BuiltinType.OBJECT);
ancestorClassNames.add(objectDefinition.getMName(project));
}
// If this class or any of its ancestor classes needs the protected flag set, set it.
if (needsProtected) iinfo.flags |= ABCConstants.CLASS_FLAG_protected;
// Add the class initialization logic to the script init.
// For class B extends A, where class A extends Object, this looks like
// getscopeobject
// findpropstrict Object
// getproperty Object
// pushscope
// findpropstrict A
// getproperty A
// dup
// pushscope
// newclass
// popscope
// popscope
// initproperty B
InstructionList initInstructions = this.classScope.getInitInstructions();
initInstructions.addInstruction(OP_getscopeobject, 0);
// Push ancestor classes onto the scope stack.
for (int i = ancestorClassNames.size() - 1; i >= 0; i--) {
Name ancestorClassName = ancestorClassNames.get(i);
initInstructions.addInstruction(OP_getlex, ancestorClassName);
// The newclass instruction below also needs the superclass on the stack, so dup it
if (i == 0) initInstructions.addInstruction(OP_dup);
initInstructions.addInstruction(OP_pushscope);
}
initInstructions.addInstruction(OP_newclass, cinfo);
for (int i = 0; i < ancestorClassNames.size(); i++)
initInstructions.addInstruction(OP_popscope);
initInstructions.addInstruction(OP_initproperty, className);
implementedInterfaceSemanticChecks(class_definition);
processResourceBundles(class_definition, project, classScope.getProblems());
}
