assign2: string support (#81)

stew/assign2.nim

@@ -32,6 +32,10 @@ func assign*[T](tgt: var seq[T], src: openArray[T]) =
   tgt.setLen(src.len)
   assignImpl(tgt.toOpenArray(0, tgt.high), src)
 
+func assign*(tgt: var string, src: string) =
+  tgt.setLen(src.len)
+  assignImpl(tgt.toOpenArrayByte(0, tgt.high), src.toOpenArrayByte(0, tgt.high))
+
 macro unsupported(T: typed): untyped =
   error "Assignment of the type " & humaneTypeName(T) & " is not supported"
 

tests/test_assign2.nim

@@ -9,6 +9,7 @@ suite "assign2":
       a = 5
       b = [2, 3]
       c = @[5, 6]
+      d = "hello"
 
     assign(c, b)
     check: c == b
@@ -21,6 +22,9 @@ suite "assign2":
     assign(c.toOpenArray(0, 1), [2, 2])
     check: c == [2, 2]
 
+    assign(d, "there!")
+    check: d == "there!"
+
     var
       dis = X(53)