internal TypeMap(NamedTypeSymbol containingType, ImmutableArray <TypeParameterSymbol> typeParameters, ImmutableArray <TypeWithAnnotations> typeArguments)
: base(ForType(containingType))
{
for (int i = 0; i < typeParameters.Length; i++)
{
TypeParameterSymbol tp = typeParameters[i];
TypeWithAnnotations ta = typeArguments[i];
if (!ta.Is(tp))
{
Mapping.Add(tp, ta);
}
}
}
private static SmallDictionary <TypeParameterSymbol, TypeWithAnnotations> ConstructMapping(ImmutableArray <TypeParameterSymbol> from, ImmutableArray <TypeWithAnnotations> to)
{
var mapping = new SmallDictionary <TypeParameterSymbol, TypeWithAnnotations>(ReferenceEqualityComparer.Instance);
Debug.Assert(from.Length == to.Length);
for (int i = 0; i < from.Length; i++)
{
TypeParameterSymbol tp = from[i];
TypeWithAnnotations ta = to[i];
if (!ta.Is(tp))
{
mapping.Add(tp, ta);
}
}
return(mapping);
}