String (ocaml_simd.ocaml_simd.ppx.Ppx

val extension : 
  size:[< `Byte | `Word ] ->
  loc:Astlib.Location.t ->
  path:'a ->
  (Pattern.String.args, Ppxlib.Location.Error.t) result ->
  Astlib.Ast_500.Parsetree.expression

val byte_extension : Ppxlib.Extension.t

val word_extension : Ppxlib.Extension.t