implicit operator tests (#15128)

Added more tests for implicit operators.

tools/nnyeah/integration/API/IntegrationAPI.cs

@@ -46,6 +46,12 @@ namespace IntegrationAPI
 	public nint And (nint a, nint b) => a & b;
 	public nint Or (nint a, nint b) => a | b;
 	public nint Xor (nint a, nint b) => a ^ b;
+	public nint ToNint (sbyte a) => a;
+	public nint ToNint (byte a) => a;
+	public nint ToNint (short a) => a;
+	public nint ToNint (char a) => a;
+	public nint ToNint (int a) => a;
+	public nint PlusOne (nint a) => a++;
     }
 
     public class NUIntAPI
@@ -70,6 +76,11 @@ namespace IntegrationAPI
 	public nuint And (nuint a, nuint b) => a & b;
 	public nuint Or (nuint a, nuint b) => a | b;
 	public nuint Xor (nuint a, nuint b) => a ^ b;
+	public nuint ToNuint (byte a) => a;
+	public nuint ToNuint (ushort a) => a;
+	public nuint ToNuint (char a) => a;
+	public nuint ToNuint (uint a) => a;
+	public nuint PlusOne (nuint a) => a++;
     }
 
     public class NFloatAPI
@@ -90,5 +101,15 @@ namespace IntegrationAPI
 	public bool Less (nfloat a, nfloat b) => a < b;
 	public bool Greater (nfloat a, nfloat b) => a > b;
 	public bool Eq (nfloat a, nfloat b) => a == b;
+	public nfloat ToNFloat (sbyte a) => a;
+	public nfloat ToNFloat (byte a) => a;
+	public nfloat ToNFloat (char a) => a;
+	public nfloat ToNFloat (short a) => a;
+	public nfloat ToNFloat (ushort a) => a;
+	public nfloat ToNFloat (int a) => a;
+	public nfloat ToNFloat (uint a) => a;
+	public nfloat ToNFloat (long a) => a;
+	public nfloat ToNFloat (ulong a) => a;
+	public nfloat ToNFloat (float a) => a;
     }
 }