public static CanInstantiate CanInstantiateType([NotNull] ITypeElement typeElement,
[NotNull] ITreeNode expression)
{
if (typeElement is IStruct || typeElement is IEnum || typeElement is IClass)
{
// filter out abstract classes
var classType = typeElement as IClass;
if (classType != null && classType.IsAbstract)
return CanInstantiate.No;
// check type has any constructor accessible
var accessContext = new ElementAccessContext(expression);
var canInstantiate = CanInstantiate.No;
foreach (var constructor in typeElement.Constructors)
{
if (constructor.IsStatic) continue;
if (AccessUtil.IsSymbolAccessible(constructor, accessContext))
{
var parametersCount = constructor.Parameters.Count;
canInstantiate |= (parametersCount == 0)
? CanInstantiate.DefaultConstructor
: CanInstantiate.ConstructorWithParameters;
}
}
return canInstantiate;
}
return CanInstantiate.No;
}
public static TypeInstantiability IsInstantiable(
[NotNull] ITypeElement typeElement, [NotNull] ITreeNode expression)
{
if (typeElement is IStruct || typeElement is IEnum || typeElement is IClass)
{
// filter out abstract classes
var classType = typeElement as IClass;
if (classType != null && classType.IsAbstract)
return TypeInstantiability.NotInstantiable;
// check type has any constructor accessable
var accessContext = new ElementAccessContext(expression);
var instantiability = TypeInstantiability.NotInstantiable;
foreach (var constructor in typeElement.Constructors)
{
if (constructor.IsStatic) continue;
if (AccessUtil.IsSymbolAccessible(constructor, accessContext))
{
var parametersCount = constructor.Parameters.Count;
instantiability |= (parametersCount == 0)
? TypeInstantiability.DefaultCtor
: TypeInstantiability.CtorWithParameters;
}
}
return instantiability;
}
return TypeInstantiability.NotInstantiable;
}
public static CanInstantiate CanInstantiateType([NotNull] ITypeElement typeElement, [NotNull] ITreeNode expression)
{
if (typeElement is IStruct || typeElement is IEnum || typeElement is IClass)
{
// filter out abstract classes
var classType = typeElement as IClass;
if (classType != null && classType.IsAbstract)
{
return(CanInstantiate.No);
}
// check type has any constructor accessible
var accessContext = new ElementAccessContext(expression);
var canInstantiate = CanInstantiate.No;
foreach (var constructor in typeElement.Constructors)
{
if (constructor.IsStatic)
{
continue;
}
if (AccessUtil.IsSymbolAccessible(constructor, accessContext))
{
var parametersCount = constructor.Parameters.Count;
canInstantiate |= (parametersCount == 0)
? CanInstantiate.DefaultConstructor
: CanInstantiate.ConstructorWithParameters;
}
}
return(canInstantiate);
}
return(CanInstantiate.No);
}
private static ElementAccessContext CreateContext <TSyntaxNodeType>(string testInput, int skip, AnalyzerLanguage language) where TSyntaxNodeType : SyntaxNode
{
var testCode = new SnippetCompiler(testInput, true, language);
var node = testCode.GetNodes <TSyntaxNodeType>().Skip(skip).First();
var context = new ElementAccessContext(testCode.CreateAnalysisContext(node));
return(context);
}
public void CreateItems(PostfixTemplateAcceptanceContext context, ICollection<ILookupItem> consumer)
{
var typeElement = context.ExpressionReferencedElement as ITypeElement;
if (typeElement is IStruct || typeElement is IEnum || typeElement is IClass)
{
// filter out abstract classes
var classType = typeElement as IClass;
if (classType != null && classType.IsAbstract) return;
// check type has any constructor accessable
var accessContext = new ElementAccessContext(context.Expression);
foreach (var constructor in typeElement.Constructors)
{
if (!constructor.IsStatic && AccessUtil.IsSymbolAccessible(constructor, accessContext))
{
consumer.Add(new PostfixLookupItem(context, "new", "new $EXPR$($CARET$)"));
break;
}
}
}
}
