private static bool IsValueTuple(GenericInstantiationTypeReference genericInstantiationTypeReference, int minArgs)
{
var args = genericInstantiationTypeReference.GenericTypeArguments;
return(args.Count >= minArgs &&
args.Count <= 8 &&
genericInstantiationTypeReference.TypeDefinition is TopLevelTypeReference topLevel &&
topLevel.Name == ValueTupleNamesByArity[args.Count] &&
topLevel.Namespace == "System");
}
public ImmutableNode <string> Visit(GenericInstantiationTypeReference genericInstantiationTypeReference)
{
var args = genericInstantiationTypeReference.GenericTypeArguments;
if (args.Count == 1 &&
genericInstantiationTypeReference.TypeDefinition is TopLevelTypeReference topLevel &&
topLevel.Name == "Nullable`1" &&
topLevel.Namespace == "System")
{
return(new ImmutableNode <string>(args[0].Accept(this), "?", null));
}
if (IsValueTuple(genericInstantiationTypeReference, minArgs: 2) && TryUseTupleSyntax(args, out var tupleSyntax))
{
return(tupleSyntax);
}
var builder = (ImmutableNode <string>)null;
var argumentsLeft = genericInstantiationTypeReference.GenericTypeArguments.Count;
void BuildNext(string typeName)
{
var(name, arity) = NameUtils.ParseGenericArity(typeName);
if (arity != 0)
{
if (argumentsLeft < arity)
{
throw new InvalidOperationException("Number of generic arguments provided does not match combined type arity.");
}
builder = new ImmutableNode <string>(null, ">", builder);
for (var i = 0; i < arity; i++)
{
argumentsLeft--;
builder = new ImmutableNode <string>(
genericInstantiationTypeReference.GenericTypeArguments[argumentsLeft].Accept(this),
i == 0 ? null : ", ",
builder);
}
builder = new ImmutableNode <string>(null, "<", builder);
}
builder = new ImmutableNode <string>(null, name, builder);
}
var currentType = genericInstantiationTypeReference.TypeDefinition;
for (; currentType is NestedTypeReference nested; currentType = nested.DeclaringType)
{
BuildNext(nested.Name);
builder = new ImmutableNode <string>(null, ".", builder);
}
topLevel = currentType as TopLevelTypeReference ??
throw new InvalidOperationException("Nested types must be declared by either a top-level type or another nested type.");
BuildNext(topLevel.Name);
if (argumentsLeft != 0)
{
throw new InvalidOperationException("Number of generic arguments provided does not match combined type arity.");
}
return(AddNamespace(topLevel, builder));
}
