fixup,break(has/getattr): allow PyStr argtype to fix "compile failed"

src/pylib/builtins/attr.nim

@@ -1,23 +1,28 @@
 
 import std/macros
+import ../pystring/strimpl
 
 proc newDotExpr(x: NimNode, attr: string): NimNode =
   newDotExpr(x, ident attr)
 
-macro hasattr*(x; attr: static[string]): bool =
-  let dot = newDotExpr(x, attr)
-  newCall("compiles", dot)
-
-macro getattr*(x; attr: static[string]): untyped =
-  newDotExpr(x, attr)
-
-macro getattr*(x; attr: static[string], default): untyped =
-  let val = newDotExpr(x, attr)
-  let attrS = newLit attr
-  result = quote do:
-    when not hasattr(`x`, `attrS`): `default`
-    else: `val`
-
-macro setattr*(x; attr: static[string], val) =
-  newAssignment(newDotExpr(x, attr), val)
+template gen(S){.dirty.} =
+  macro hasattr*(x; attr: static[S]): bool =
+    let dot = newDotExpr(x, attr)
+    newCall("compiles", dot)
+
+  macro getattr*(x; attr: static[S]): untyped =
+    newDotExpr(x, attr)
+
+  macro getattr*(x; attr: static[S], default): untyped =
+    let val = newDotExpr(x, attr)
+    let attrS = newLit attr
+    result = quote do:
+      when not hasattr(`x`, `attrS`): `default`
+      else: `val`
+
+  macro setattr*(x; attr: static[S], val) =
+    newAssignment(newDotExpr(x, attr), val)
+
+gen string
+gen PyStr