/** Declare a function. TODO: static vs. instance. */
@Override
void declareFunction(FunctionNode func) {
func.parseFunctionBody(classScope.getProblems());
final FunctionDefinition funcDef = func.getDefinition();
final boolean is_constructor = func.isConstructor();
functionSemanticChecks(func);
// Save the constructor function until
// we've seen all the instance variables
// that might need initialization.
if (is_constructor) {
if (this.ctorFunction == null) this.ctorFunction = func;
else {
// If we already have a ctor, must be multiply defined. Ignore it and generate problem
String name = this.className.getBaseName();
classScope.addProblem(new MultipleContructorDefinitionsProblem(func, name));
}
} else {
LexicalScope ls = funcDef.isStatic() ? classStaticScope : classScope;
MethodInfo mi = classScope.getGenerator().generateFunction(func, ls, null);
if (mi != null) {
Name funcName = funcDef.getMName(classScope.getProject());
ITraitVisitor tv =
ls.traitsVisitor.visitMethodTrait(
functionTraitKind(func, TRAIT_Method), funcName, 0, mi);
if (funcName != null)
classScope
.getMethodBodySemanticChecker()
.checkFunctionForConflictingDefinitions(func, funcDef);
if (!funcDef.isStatic())
if (funcDef.getNamespaceReference()
instanceof NamespaceDefinition.IProtectedNamespaceDefinition)
this.iinfo.flags |= ABCConstants.CLASS_FLAG_protected;
ls.processMetadata(tv, getAllMetaTags(funcDef));
if (func.hasModifier(ASModifier.FINAL)) tv.visitAttribute(Trait.TRAIT_FINAL, Boolean.TRUE);
if (func.hasModifier(ASModifier.OVERRIDE))
tv.visitAttribute(Trait.TRAIT_OVERRIDE, Boolean.TRUE);
tv.visitEnd();
}
}
}
/**
* 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()));
}
}
}