Gdb pretty printers (#8263)

tests/untestable/gdb/gdb_pretty_printer_test_program.nim

@@ -0,0 +1,53 @@
+
+
+import tables
+
+type
+  MyEnum = enum
+    meOne,
+    meTwo,
+    meThree,
+    meFour,
+
+  MyOtherEnum = enum
+    moOne,
+    moTwo,
+    moThree,
+    moFoure,
+
+
+var counter = 0
+
+proc myDebug[T](arg: T): void =
+  counter += 1
+
+proc testProc(): void =
+  var myEnum = meTwo
+  myDebug(myEnum)
+  # create a string object but also make the NTI for MyEnum is generated
+  var myString = $myEnum
+  myDebug(myString)
+  var mySet = {meOne,meThree}
+  myDebug(mySet)
+
+  # for MyOtherEnum there is no NTI. This tests the fallback for the pretty printer.
+  var moEnum = moTwo
+  myDebug(moEnum)
+  var moSet = {moOne,moThree}
+  myDebug(moSet)
+
+  let myArray = [1,2,3,4,5]
+  myDebug(myArray)
+  let mySeq   = @["one","two","three"]
+  myDebug(mySeq)
+
+  var myTable = initTable[string, int]()
+  myTable["one"] = 1
+  myTable["two"] = 2
+  myTable["three"] = 3
+  myDebug(myTable)
+
+  echo(counter)
+
+
+testProc()