discard destroys its argument in-place (#9478)

2019-02-23 14:03:32 +01:00 · 2019-02-23 14:03:32 +01:00 · f39aa1b40b
commit f39aa1b40b
parent 9884129058
2 changed files with 22 additions and 0 deletions
--- a/tests/destructor/tdiscard.nim
+++ b/tests/destructor/tdiscard.nim
@ -0,0 +1,18 @@
+type
+  O = object
+
+var dCalls = 0
+
+proc `=destroy`(x: var O) = inc dCalls
+proc `=sink`(x: var O, y: O) = doAssert false
+
+proc newO(): O = discard
+
+proc main() =
+  doAssert dCalls == 0
+  discard newO()
+  doAssert dCalls == 1
+  discard newO()
+  doAssert dCalls == 2
+
+main()