Make C# static methods accessible.

[zaevi]

Close #79896.

This PR adds a code generator to generate InvokeGodotClassStaticMethod and allows GDScript to access C# static methods via CSharpScript::callp -> ScriptManagerBridge.CallStatic -> YourClass.InvokeGodotClassStaticMethod -> YourClass.YourStaticMethod.

Example:

// res://CSharpScripts/Test.cs
public partial class Test : Node
{
    public static void StaticSayHello() => GD.Print("Hello from C#!");

    public static int StaticAdd(int a, int b) => a + b;

    public static int StaticAdd(int a, int b, int c) => a + b + c;
}

// res://CSharpScripts/Parent.cs
public partial class Parent : Node
{
    public static void ParentStaticMethod() => GD.Print("ParentStaticMethod");

    public static void StaticMethod() => GD.Print("StaticMethod from Parent");
}

// res://CSharpScripts/Child.cs
public partial class Child : Parent
{
    public static void ChildStaticMethod() => GD.Print("ChildStaticMethod");

    public new static void StaticMethod() => GD.Print("StaticMethod from Child");
}

@tool
extends EditorScript

func _run():
	var Test = load("res://CSharpScripts/Test.cs") as Script

	Test.StaticSayHello() # Hello from C#!
	print(Test.StaticAdd(1,2)) # 3
	print(Test.StaticAdd(1,2,3)) # 6
	print(Test.new().StaticAdd(4,5,6)) # 15

	var Parent = load("res://CSharpScripts/Parent.cs") as Script
	var Child = load("res://CSharpScripts/Child.cs") as Script

	Parent.StaticMethod(); # StaticMethod from Parent
	Child.StaticMethod(); # StaticMethod from Child

	Parent.ParentStaticMethod(); # ParentStaticMethod
	Child.ParentStaticMethod(); # ParentStaticMethod
	Child.ChildStaticMethod(); # ChildStaticMethod

csharp_static_method_test.zip

[raulsntos]

Thanks, I've tested with the provided project and works as expected. Just a few comments about the implementation.

[raulsntos]

LGTM.

[AThousandShips]

Save for this, the style looks good

[akien-mga]

Thanks!

[Hanprogramer]

This doesn't work in tools scripts. Both GDScript and C# using tool attribute. Same error: Parse Error: Static function "CreateNewDB()" not found in base "CSharpScript".

C#:

using Godot;

[Tool]
[GlobalClass]
public partial class DBHAutoload : GodotObject
{
    public static void CreateNewDB(string path, string dbName, string namespacename, bool gen_class, string class_name, bool add_default_fields)
    {
        var content = ".. insert content here ...";
        var file = FileAccess.Open(path, FileAccess.ModeFlags.Write);
        file.StoreString(content);
        file.Close();
    }
}

GD:

@tool
extends Control

@export var create_dialog : Window

func _on_dbh_create_dialog_create(path, dbname, namespacename, gen_class, classname, add_defaultfields):
	print("Creating in: "  + path)
	DBHAutoload.CreateNewDB()#.CreateNewDB(path,dbname,namespacename,gen_class,classname, add_defaultfields)

[Zireael07]

Make a separate issue, the PR was closed months ago