closes #16331; add testcase (#20730)

nim-lang · Nov 2, 2022 · 841d9d5 · 841d9d5
1 parent 58f79e7
commit 841d9d5
Showing 1 changed file with 12 additions and 0 deletions.
diff --git a/tests/tuples/ttuples_issues.nim b/tests/tuples/ttuples_issues.nim
@@ -107,6 +107,18 @@ template main() =
         return (x,y)
     doAssert bar() == (10, (11,))
 
+  block: # bug #16331
+    type T1 = tuple[a, b: int]
+
+    proc p(b: bool): T1 =
+      var x: T1 = (10, 20)
+      x = if b: (x.b, x.a) else: (-x.b, -x.a)
+      x
+
+    doAssert p(false) == (-20, -10)
+    doAssert p(true) == (20, 10)
+
+
 proc mainProc() =
   # other tests should be in `main`
   block: