From f3b8a3cbbcee905eb6ed0b7268180b2d872eff7d Mon Sep 17 00:00:00 2001
From: Billingsly Wetherfordshire <phowl.mouth@gmail.com>
Date: Mon, 1 Jun 2015 06:04:22 -0500
Subject: [PATCH 1/3] made string compatible with openarray[char]

---
 compiler/sigmatch.nim | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/compiler/sigmatch.nim b/compiler/sigmatch.nim
index 7ea2c3d6f1..072890ddd7 100644
--- a/compiler/sigmatch.nim
+++ b/compiler/sigmatch.nim
@@ -748,6 +748,11 @@ proc typeRel(c: var TCandidate, f, aOrig: PType, doBind = true): TTypeRelation =
         result = isConvertible
       elif typeRel(c, base(f), a.sons[0]) >= isGeneric:
         result = isConvertible
+    of tyString:
+      if f.sons[0].kind == tyChar:
+        result = isConvertible
+      elif f.sons[0].kind == tyGenericParam and typeRel(c, base(f), base(a)) >= isGeneric:
+        result = isConvertible
     else: discard
   of tySequence:
     case a.kind

From 87c8d586b5955e8183b822016a3ebd2fcd0a821c Mon Sep 17 00:00:00 2001
From: Billingsly Wetherfordshire <phowl.mouth@gmail.com>
Date: Mon, 1 Jun 2015 07:37:36 -0500
Subject: [PATCH 2/3] string only matches for openarray not varargs

---
 compiler/sigmatch.nim | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/compiler/sigmatch.nim b/compiler/sigmatch.nim
index 072890ddd7..f506e3ff54 100644
--- a/compiler/sigmatch.nim
+++ b/compiler/sigmatch.nim
@@ -749,10 +749,11 @@ proc typeRel(c: var TCandidate, f, aOrig: PType, doBind = true): TTypeRelation =
       elif typeRel(c, base(f), a.sons[0]) >= isGeneric:
         result = isConvertible
     of tyString:
-      if f.sons[0].kind == tyChar:
-        result = isConvertible
-      elif f.sons[0].kind == tyGenericParam and typeRel(c, base(f), base(a)) >= isGeneric:
-        result = isConvertible
+      if f.kind == tyOpenArray:
+        if f.sons[0].kind == tyChar:
+          result = isConvertible
+        elif f.sons[0].kind == tyGenericParam and typeRel(c, base(f), base(a)) >= isGeneric:
+          result = isConvertible
     else: discard
   of tySequence:
     case a.kind

From 80a13a408e39ca197f42398163ef7917a64d1aad Mon Sep 17 00:00:00 2001
From: fowlmouth <phowl.mouth@gmail.com>
Date: Mon, 1 Jun 2015 11:01:50 -0500
Subject: [PATCH 3/3] added a test

---
 tests/typerel/tstr_as_openarray.nim | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)
 create mode 100644 tests/typerel/tstr_as_openarray.nim

diff --git a/tests/typerel/tstr_as_openarray.nim b/tests/typerel/tstr_as_openarray.nim
new file mode 100644
index 0000000000..fc28d6c933
--- /dev/null
+++ b/tests/typerel/tstr_as_openarray.nim
@@ -0,0 +1,22 @@
+discard """
+  output: '''success'''
+"""
+var s = "HI"
+
+proc x (zz: openarray[char]) =
+  discard
+
+x s
+
+proc z [T] (zz: openarray[T]) =
+  discard
+
+z s
+z([s,s,s])
+
+proc y [T] (arg: var openarray[T]) =
+  arg[0] = 'X'
+y s
+doAssert s == "XI"
+
+echo "success"