/// <summary>
/// Return all of the type parameters in this type and enclosing types,
/// from outer-most to inner-most type.
/// </summary>
internal static ImmutableArray <TypeParameterSymbol> GetAllTypeParameters(this NamedTypeSymbol type)
{
// Avoid allocating a builder in the common case.
if ((object)type.ContainingType == null)
{
return(type.TypeParameters);
}
var builder = ArrayBuilder <TypeParameterSymbol> .GetInstance();
type.GetAllTypeParameters(builder);
return(builder.ToImmutableAndFree());
}
/// <summary>
/// Return the nearest type parameter with the given name in
/// this type or any enclosing type.
/// </summary>
internal static TypeParameterSymbol FindEnclosingTypeParameter(this NamedTypeSymbol type, string name)
{
var allTypeParameters = ArrayBuilder <TypeParameterSymbol> .GetInstance();
type.GetAllTypeParameters(allTypeParameters);
TypeParameterSymbol result = null;
foreach (TypeParameterSymbol tpEnclosing in allTypeParameters)
{
if (name == tpEnclosing.Name)
{
result = tpEnclosing;
break;
}
}
allTypeParameters.Free();
return(result);
}
/// <summary>
/// Returns a constructed type given the type it is constructed from and type arguments for its enclosing types and itself.
/// </summary>
/// <param name="typeArguments">the type arguments that will replace the type parameters, starting with those for enclosing types</param>
/// <returns></returns>
private static NamedTypeSymbol DeepConstruct(NamedTypeSymbol type, ImmutableArray<TypeSymbol> typeArguments)
{
Assert.True(type.IsDefinition);
var allTypeParameters = ArrayBuilder<TypeParameterSymbol>.GetInstance();
type.GetAllTypeParameters(allTypeParameters);
return new TypeMap(allTypeParameters.ToImmutableAndFree(), typeArguments).SubstituteNamedType(type);
}
