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
}
		return true;
	}
	public static boolean isUseableTypeInContext(ITypeBinding type, IBinding context, boolean noWildcards) {
		if (type.isArray()) {
			type= type.getElementType();
		}
		if (type.isRawType() || type.isPrimitive()) {
			return true;
		}
		if (type.isTypeVariable()) {
			return isVariableDefinedInContext(context, type);
		}
		if (type.isGenericType()) {
			ITypeBinding[] typeParameters= type.getTypeParameters();
			for (int i= 0; i < typeParameters.length; i++) {
				if (!isUseableTypeInContext(typeParameters[i], context, noWildcards)) {
					return false;
				}
			}
			return true;
		}
		if (type.isParameterizedType()) {
			ITypeBinding[] typeArguments= type.getTypeArguments();
			for (int i= 0; i < typeArguments.length; i++) {
				if (!isUseableTypeInContext(typeArguments[i], context, noWildcards)) {
					return false;
				}
			}
			return true;