Merge tests into a larger file (part 2 of ∞) (#9335)

* merge controlflow tests

* merge distinct tests

* merge enum tests

* merge fields tests

* merge implicit tests

* merge iter issues tests

tests/implicit/timplicit.nim

@@ -0,0 +1,46 @@
+discard """
+  output: '''
+1
+2
+3
+4
+2
+88
+'''
+"""
+
+
+for x in [1, 2, 3, 4]:
+  echo x
+
+
+type
+  TValue* {.pure, final.} = object of RootObj
+    a: int
+  PValue = ref TValue
+  PPValue = ptr PValue
+
+
+var x: PValue
+new x
+var sp: PPValue = addr x
+
+sp.a = 2
+if sp.a == 2: echo 2  # with sp[].a the error is gone
+
+# Test the new auto-deref a little
+
+{.experimental.}
+
+proc p(x: var int; y: int) = x += y
+
+block:
+  var x: ref int
+  new(x)
+
+  x.p(44)
+
+  var indirect = p
+  x.indirect(44)
+
+  echo x[]