1 files changed, 50 insertions, 0 deletions
diff --git a/tests/stdlib/tdecls.nim b/tests/stdlib/tdecls.nim
new file mode 100644
index 000000000..42dc646f2
--- /dev/null
+++ b/tests/stdlib/tdecls.nim
@@ -0,0 +1,50 @@
+discard """
+  matrix: "--mm:refc; --mm:orc"
+  targets: "c cpp js"
+"""
+import std/assertions
+import std/decls
+
+template fun() =
+  var s = @[10,11,12]
+  var a {.byaddr.} = s[0]
+  a+=100
+  doAssert s == @[110,11,12]
+  doAssert a is int
+  var b {.byaddr.}: int = s[0]
+  doAssert a.addr == b.addr
+
+  {.push warningAsError[ImplicitTemplateRedefinition]: on.}
+  # in the future ImplicitTemplateRedefinition will be an error anyway
+  doAssert not compiles(block:
+    # redeclaration not allowed
+    var foo = 0
+    var foo {.byaddr.} = s[0])
+
+  doAssert not compiles(block:
+    # ditto
+    var foo {.byaddr.} = s[0]
+    var foo {.byaddr.} = s[0])
+  {.pop.}
+
+  block:
+    var b {.byaddr.} = s[1] # redeclaration ok in sub scope
+    b = 123
+
+  doAssert s == @[110,123,12]
+
+  b = b * 10
+  doAssert s == @[1100,123,12]
+
+  doAssert not compiles(block:
+    var b2 {.byaddr.}: float = s[2])
+
+  doAssert compiles(block:
+    var b2 {.byaddr.}: int = s[2])
+
+proc fun2() = fun()
+fun()
+fun2()
+static: fun2()
+when false: # pending bug #13887
+  static: fun()