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/UnresolvedElementsSubProcessor.java
} else if (Bindings.findFieldInHierarchy(castType, accessSelector.getIdentifier()) == null) {
			return false;
		}
		ITypeBinding bindingToCast= accessExpression.resolveTypeBinding();
		if (bindingToCast != null && !TypeRules.canCast(castType, bindingToCast)) {
			return false;
		}
		IMethodBinding res= Bindings.findMethodInHierarchy(castType, accessSelector.getIdentifier(), paramTypes);
		if (res != null) {
			AST ast= expression.getAST();
			ASTRewrite rewrite= ASTRewrite.create(ast);
			CastExpression newCast= ast.newCastExpression();
			newCast.setType((Type) ASTNode.copySubtree(ast, expression.getType()));
			newCast.setExpression((Expression) rewrite.createCopyTarget(accessExpression));
			ParenthesizedExpression parents= ast.newParenthesizedExpression();
			parents.setExpression(newCast);
			ASTNode node= rewrite.createCopyTarget(expression.getExpression());
			rewrite.replace(expression, node, null);
			rewrite.replace(accessExpression, parents, null);
			String label= CorrectionMessages.UnresolvedElementsSubProcessor_missingcastbrackets_description;
			Image image= JavaPluginImages.get(JavaPluginImages.IMG_CORRECTION_CAST);
			ASTRewriteCorrectionProposal proposal= new ASTRewriteCorrectionProposal(label, cu, rewrite, 8, image);
			proposals.add(proposal);
			return true;
		}
		return false;
	}
	private static void addParameterMissmatchProposals(IInvocationContext context, IProblemLocation problem, List similarElements, ASTNode invocationNode, List arguments, Collection proposals) throws CoreException {
		int nSimilarElements= similarElements.size();
		ITypeBinding[] argTypes= getArgumentTypes(arguments);