internal override void GetCandidateExtensionMethods(
ArrayBuilder <MethodSymbol> methods,
string name,
int arity,
LookupOptions options,
Binder originalBinder)
{
Debug.Assert(methods.Count == 0);
bool callerIsSemanticModel = originalBinder.IsSemanticModelBinder;
// We need to avoid collecting multiple candidates for an extension method imported both through a namespace and a static class
// We will look for duplicates only if both of the following flags are set to true
bool seenNamespaceWithExtensionMethods = false;
bool seenStaticClassWithExtensionMethods = false;
foreach (var nsOrType in this.GetUsings(basesBeingResolved: null))
{
switch (nsOrType.NamespaceOrType.Kind)
{
case SymbolKind.Namespace:
{
var count = methods.Count;
((NamespaceSymbol)nsOrType.NamespaceOrType).GetExtensionMethods(methods, name, arity, options);
// If we found any extension methods, then consider this using as used.
if (methods.Count != count)
{
MarkImportDirective(nsOrType.UsingDirectiveReference, callerIsSemanticModel);
seenNamespaceWithExtensionMethods = true;
}
break;
}
case SymbolKind.NamedType:
{
var count = methods.Count;
((NamedTypeSymbol)nsOrType.NamespaceOrType).GetExtensionMethods(methods, name, arity, options);
// If we found any extension methods, then consider this using as used.
if (methods.Count != count)
{
MarkImportDirective(nsOrType.UsingDirectiveReference, callerIsSemanticModel);
seenStaticClassWithExtensionMethods = true;
}
break;
}
}
}
if (seenNamespaceWithExtensionMethods && seenStaticClassWithExtensionMethods)
{
methods.RemoveDuplicates();
}
}
public void RemoveDuplicates1()
{
var builder = new ArrayBuilder<int> { 1, 2, 3, 2, 4, 5, 1 };
builder.RemoveDuplicates();
AssertEx.Equal(new[] { 1, 2, 3, 4, 5 }, builder);
builder = new ArrayBuilder<int> { 1 };
builder.RemoveDuplicates();
AssertEx.Equal(new[] { 1 }, builder);
builder = new ArrayBuilder<int>();
builder.RemoveDuplicates();
AssertEx.Equal(new int[0], builder);
}
public void RemoveDuplicates1()
{
var builder = new ArrayBuilder <int> {
1, 2, 3, 2, 4, 5, 1
};
builder.RemoveDuplicates();
AssertEx.Equal(new[] { 1, 2, 3, 4, 5 }, builder);
builder = new ArrayBuilder <int> {
1
};
builder.RemoveDuplicates();
AssertEx.Equal(new[] { 1 }, builder);
builder = new ArrayBuilder <int>();
builder.RemoveDuplicates();
AssertEx.Equal(new int[0], builder);
}
internal void LookupExtensionMethodsInUsings(
ArrayBuilder<MethodSymbol> methods,
string name,
int arity,
LookupOptions options,
bool callerIsSemanticModel)
{
Debug.Assert(methods.Count == 0);
// We need to avoid collecting multiple candidates for an extension method imported both through a namespace and a static class
// We will look for duplicates only if both of the following flags are set to true
bool seenNamespaceWithExtensionMethods = false;
bool seenStaticClassWithExtensionMethods = false;
foreach (var nsOrType in this.Usings)
{
switch (nsOrType.NamespaceOrType.Kind)
{
case SymbolKind.Namespace:
{
var count = methods.Count;
((NamespaceSymbol)nsOrType.NamespaceOrType).GetExtensionMethods(methods, name, arity, options);
// If we found any extension methods, then consider this using as used.
if (methods.Count != count)
{
MarkImportDirective(nsOrType.UsingDirective, callerIsSemanticModel);
seenNamespaceWithExtensionMethods = true;
}
break;
}
case SymbolKind.NamedType:
{
var count = methods.Count;
((NamedTypeSymbol)nsOrType.NamespaceOrType).GetExtensionMethods(methods, name, arity, options);
// If we found any extension methods, then consider this using as used.
if (methods.Count != count)
{
MarkImportDirective(nsOrType.UsingDirective, callerIsSemanticModel);
seenStaticClassWithExtensionMethods = true;
}
break;
}
}
}
if (seenNamespaceWithExtensionMethods && seenStaticClassWithExtensionMethods)
{
methods.RemoveDuplicates();
}
}
