Bug 82940 [quick fix] Missing sensible conversion suggestion
For this code > % cat Test.java import java.util.Collections; import java.util.List; public class Test { interface Wrapper { int doit(); } private static final List<Wrapper> STD_WRAPPERS = Collections.singletonList ((Wrapper)new Wrapper() { public int doit() { return 0; } }); private static final List<Wrapper> STD_WRAPPERS2 = Collections.singletonList (new Wrapper() { public int doit() { return 0; } }); } The value passed Collections.singletonList is actually of the right type so a sensible conversion would be to put in the cast (see the difference between the 2 statics). The current quick fixes offered assume the type being assigned to is wrong (when infact it is right). A useful quick fix would be to cast the parameter to the right type to give the left type (this would help with any 1 arg method of the form X<T> method(T)
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/correction/ASTResolving.java
private static boolean isVariableDefinedInContext(IBinding binding, ITypeBinding typeVariable) {
		if (binding.getKind() == IBinding.VARIABLE) {
			IVariableBinding var= (IVariableBinding) binding;
			binding= var.getDeclaringMethod();
			if (binding == null) {
				binding= var.getDeclaringClass();
			}
		}
		if (binding instanceof IMethodBinding) {
			if (binding == typeVariable.getDeclaringMethod()) {
				return true;
			}
			binding= ((IMethodBinding) binding).getDeclaringClass();
		}
		while (binding instanceof ITypeBinding) {
			if (binding == typeVariable.getDeclaringClass()) {
				return true;
			}
			if (Modifier.isStatic(binding.getModifiers())) {
				break;
			}
			binding= ((ITypeBinding) binding).getDeclaringClass();
		}
		return false;
	}
	public static boolean isUseableTypeInContext(ITypeBinding[] binding, IBinding context, boolean noWildcards) {
		for (int i= 0; i < binding.length; i++) {
			if (!isUseableTypeInContext(binding[i], context, noWildcards)) {
				return false;
			}