Do I understand correctly that compiler does not do overload resolution in string interpolated handler?

[voroninp]

Spec says about the method:

public void AppendFormatted<T> (T value, int alignment, string? format, string name);

and there's no way to make it more specific by providing overloads for concrete types?

public void AppendFormatted<T>(Func<T> lazyValue, int alignment, string? format, string name);

[333fred]

https://github.com/dotnet/csharplang/blob/main/proposals/csharp-10.0/improved-interpolated-strings.md#append-method-overload-resolution

The spec very specifically goes over how overload resolution is performed.

[voroninp]

Hm, I need to recheck my POC then, coz overload did not work as I expected it to be.

[333fred]

Well, in your second example, that overload will never be chosen, as there aren't ever 4 arguments to any AppendFormatted call unless you provide default parameter values for the 4th one.