Support tuples in nim-gdb (#21410)

* Support for printing tuple types

* Add test of printing a tuple

* Add support for printing tuples in GDB

* Forgot to [skip ci]

tests/untestable/gdb/gdb_pretty_printer_test.py

@@ -28,7 +28,8 @@ outputs = [
   'seq(3, 3) = {"one", "two", "three"}',
   'Table(3, 64) = {[4] = "four", [5] = "five", [6] = "six"}',
   'Table(3, 8) = {["two"] = 2, ["three"] = 3, ["one"] = 1}',
-  '{a = 1, b = "some string"}'
+  '{a = 1, b = "some string"}',
+  '("hello", 42)'
 ]
 
 argRegex = re.compile("^.* = (?:No suitable Nim \$ operator found for type: \w+\s*)*(.*)$")

tests/untestable/gdb/gdb_pretty_printer_test_program.nim

@@ -80,7 +80,10 @@ proc testProc(): void =
   var obj = MyObj(a: 1, b: "some string")
   myDebug(obj) #15
 
-  assert counter == 15
+  var tup = ("hello", 42)
+  myDebug(tup) # 16
+
+  assert counter == 16
 
 
 testProc()