[MLton-commit] r5053

[Vesa Karvonen]

Initial commit of a lib of misc utils to be refactored.
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A   mltonlib/trunk/com/ssh/misc-util/unstable/sml-syntax.sml

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Added: mltonlib/trunk/com/ssh/misc-util/unstable/sml-syntax.sml
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--- mltonlib/trunk/com/ssh/misc-util/unstable/sml-syntax.sml	2007-01-12 12:34:47 UTC (rev 5052)
+++ mltonlib/trunk/com/ssh/misc-util/unstable/sml-syntax.sml	2007-01-12 12:35:12 UTC (rev 5053)
@@ -0,0 +1,35 @@
+(* Copyright (C) 2007 SSH Communications Security, Helsinki, Finland
+ *
+ * This code is released under the MLton license, a BSD-style license.
+ * See the LICENSE file or http://mlton.org/License for details.
+ *)
+
+(*
+ * Utilities for dealing with the syntax of Standard ML.
+ *)
+
+structure SmlSyntax :> sig
+   (** == PREDICATES FOR IDENTIFIERS == *)
+
+   val isAlphaNumId : String.t UnPr.t
+   val isId         : String.t UnPr.t
+   val isLabel      : String.t UnPr.t
+   val isLongId     : String.t UnPr.t
+   val isNumLabel   : String.t UnPr.t
+end = struct
+   structure C = Char and L = List and S = String
+   val isSym = C.contains "!%&$#+-/:<=>?@\\~`^|*"
+   val isntEmpty = 0 <\ op < o size
+   val isSymId = isntEmpty andAlso S.all isSym
+   val isAlphaNumId = isntEmpty
+                      andAlso C.isAlpha o S.sub /> 0
+                      andAlso S.all (C.isAlphaNum
+                                     orElse #"'" <\ op =
+                                     orElse #"_" <\ op =)
+   val isNumLabel = isntEmpty
+                    andAlso #"0" <\ op <> o S.sub /> 0
+                    andAlso S.all C.isDigit
+   val isId = isAlphaNumId orElse isSymId
+   val isLongId = L.all isId o S.fields (#"." <\ op =)
+   val isLabel = isId orElse isNumLabel
+end


Property changes on: mltonlib/trunk/com/ssh/misc-util/unstable/sml-syntax.sml
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Name: svn:eol-style
   + native