Error when attempting to pass nested enum struct property to parameters of type `any[]`

[Mikusch]

Using the SourcePawn Compiler 1.12.0.7140, attempting to pass an enum struct property that also is an enum struct to a function expecting any[] will throw a "no viable conversion" error. Sorry for the terrible title, but I've attached an example to illustrate:

enum struct InnerStruct
{
	int num;
}

enum struct OuterStruct
{
	InnerStruct inner;
}

public void OnPluginStart()
{
	OuterStruct myStruct;
	Test(myStruct.inner);
}

void Test(any[] arr)
{
	// no viable conversion from InnerStruct[] to any[]
}

Output:

spcomptest.sp(14) : error 450: no viable conversion from "InnerStruct[]" to "any[]"
    14 |         Test(myStruct.inner);
------------------------------^

This seems to be specifically an issue with nested enum structs as this still works:

OuterStruct myStruct;
Test(myStruct);

[Bradasparky]

This might be related. Passing this into an any[] param causes error 035: argument type mismatch (argument 1). I found it by compiling a plugin doing Call_PushArrayEx(this, sizeof(this), SM_PARAM_COPYBACK) inside a struct's member function.

enum struct A
{
    int i;

    void InnerTest()
    {
        OuterTest(this); // error 035: argument type mismatch (argument 1)
    }
}

void OuterTest(any[] arr) { }

public void OnPluginStart()
{
    A arr;
    OuterTest(arr);
}

[dvander]

Thanks for the test case... I'm in the midst of a very big refactoring to remove matchtag(), which I'm hoping will lead a world where these kinds of issues are easy to fix and difficult to regress.

[psychonic]

I'm not sure if this is the same issue, or something different, but the SourceMod testsuite fails with a similar error when pointing at current latest SourcePawn.

Compiling test_sorting.sp
SourcePawn Compiler 1.13.0.1
Copyright (c) 1997-2006 ITB CompuPhase
Copyright (c) 2004-2021 AlliedModders LLC

../sourcemod/plugins/testsuite/mock/test_sorting.sp(108) : error 450: no viable conversion from "any[10]" to "int[]"
   108 |     SortCustom1D(view_as<any>(floatArray), sizeof(floatArray), Custom1DSortFloat);
--------------------------^

1 Error.

https://github.com/alliedmodders/sourcemod/actions/runs/11532714757/job/32104813488?pr=2211

[dvander]

These would be much cleaner to fix with the IR stuff all done, but alas, it's too important to leave broken forever.

Fixed on master now.