public static IType GuessType(RefactoringContext context, AstNode expr)
{
if (expr is SimpleType && expr.Role == Roles.TypeArgument) {
if (expr.Parent is MemberReferenceExpression || expr.Parent is IdentifierExpression) {
var rr = context.Resolve (expr.Parent);
var argumentNumber = expr.Parent.GetChildrenByRole (Roles.TypeArgument).TakeWhile (c => c != expr).Count ();
var mgrr = rr as MethodGroupResolveResult;
if (mgrr != null && mgrr.Methods.Any () && mgrr.Methods.First ().TypeArguments.Count > argumentNumber)
return mgrr.Methods.First ().TypeParameters[argumentNumber];
} else if (expr.Parent is MemberType || expr.Parent is SimpleType) {
var rr = context.Resolve (expr.Parent);
var argumentNumber = expr.Parent.GetChildrenByRole (Roles.TypeArgument).TakeWhile (c => c != expr).Count ();
var mgrr = rr as TypeResolveResult;
if (mgrr != null && mgrr.Type.TypeParameterCount > argumentNumber) {
return mgrr.Type.GetDefinition ().TypeParameters[argumentNumber];
}
}
}
var type = GetValidTypes(context.Resolver, expr).ToArray();
var typeInference = new TypeInference(context.Compilation);
typeInference.Algorithm = TypeInferenceAlgorithm.Improved;
var inferedType = typeInference.FindTypeInBounds(type, emptyTypes);
return inferedType;
}
IEnumerable<ICompletionData> CreateTypeCompletionData(IType hintType)
{
var wrapper = new CompletionDataWrapper(this);
var state = GetState();
Func<IType, IType> pred = null;
Action<ICompletionData, IType> typeCallback = null;
var inferredTypesCategory = new Category("Inferred Types", null);
var derivedTypesCategory = new Category("Derived Types", null);
if (hintType != null) {
if (hintType.Kind != TypeKind.Unknown) {
var lookup = new MemberLookup(
ctx.CurrentTypeDefinition,
Compilation.MainAssembly
);
typeCallback = (data, t) => {
//check if type is in inheritance tree.
if (hintType.GetDefinition() != null &&
t.GetDefinition() != null &&
t.GetDefinition().IsDerivedFrom(hintType.GetDefinition())) {
data.CompletionCategory = derivedTypesCategory;
}
};
pred = t => {
if (t.Kind == TypeKind.Interface && hintType.Kind != TypeKind.Array) {
return null;
}
// check for valid constructors
if (t.GetConstructors().Count() > 0) {
bool isProtectedAllowed = currentType != null ?
currentType.Resolve(ctx).GetDefinition().IsDerivedFrom(t.GetDefinition()) : false;
if (!t.GetConstructors().Any(m => lookup.IsAccessible(m, isProtectedAllowed))) {
return null;
}
}
// check derived types
var typeDef = t.GetDefinition();
var hintDef = hintType.GetDefinition();
if (typeDef != null && hintDef != null && typeDef.IsDerivedFrom(hintDef)) {
var newType = wrapper.AddType(t, true);
if (newType != null) {
newType.CompletionCategory = inferredTypesCategory;
}
}
// check type inference
var typeInference = new TypeInference(Compilation);
typeInference.Algorithm = TypeInferenceAlgorithm.ImprovedReturnAllResults;
var inferedType = typeInference.FindTypeInBounds (new [] { t }, new [] { hintType });
if (inferedType != SpecialType.UnknownType) {
var newType = wrapper.AddType(inferedType, true);
if (newType != null) {
newType.CompletionCategory = inferredTypesCategory;
}
return null;
}
return t;
};
if (!(hintType.Kind == TypeKind.Interface && hintType.Kind != TypeKind.Array)) {
var hint = wrapper.AddType(hintType, true);
DefaultCompletionString = hint.DisplayText;
if (hint != null) {
hint.CompletionCategory = derivedTypesCategory;
}
}
if (hintType is ParameterizedType && hintType.TypeParameterCount == 1 && hintType.FullName == "System.Collections.Generic.IEnumerable") {
var arg = ((ParameterizedType)hintType).TypeArguments.FirstOrDefault();
if (arg.Kind != TypeKind.TypeParameter) {
var array = new ArrayType (ctx.Compilation, arg, 1);
wrapper.AddType(array, true);
}
}
} else {
var hint = wrapper.AddType(hintType, true);
if (hint != null) {
DefaultCompletionString = hint.DisplayText;
hint.CompletionCategory = derivedTypesCategory;
}
}
}
AddTypesAndNamespaces(wrapper, state, null, pred, m => false, typeCallback);
if (hintType == null || hintType == SpecialType.UnknownType) {
AddKeywords(wrapper, primitiveTypesKeywords.Where(k => k != "void"));
}
CloseOnSquareBrackets = true;
AutoCompleteEmptyMatch = true;
AutoCompleteEmptyMatchOnCurlyBracket = false;
return wrapper.Result;
}
public static AstType GuessAstType(RefactoringContext context, AstNode expr)
{
var type = GetValidTypes(context.Resolver, expr).ToArray();
var typeInference = new TypeInference(context.Compilation);
typeInference.Algorithm = TypeInferenceAlgorithm.Improved;
var inferedType = typeInference.FindTypeInBounds(type, emptyTypes);
if (inferedType.Kind == TypeKind.Unknown)
return new PrimitiveType("object");
return context.CreateShortType(inferedType);
}