extended unix grammars with character-based spelling

examples/unix/Unix.gf

@@ -1,24 +1,43 @@
-abstract Unix = {
+abstract Unix = Char ** {
 
   cat
-    S ;
-    Line ;
-    Command ;
-    File ;
+    S ;           -- whole command line
+    Command ;     -- one command
+    File ;        -- file name
+    Word ;        -- string e.g. in grep
+    [Word] {1} ;  -- 
 
   fun
-    Pipe : Command -> S -> S ;
-    Comm : Command -> S ;
+
+-- Catch-all: command dictated letter by letter.
+
+    CommWords : [Word] -> Command ;
+
+-- General command-line structure.
+
+    Redirect : S -> File -> S ;     -- cs >f
+    Pipe     : S -> Command -> S ;  -- cs | c
+    Comm     : Command -> S ;       -- c
+
+--- This would be cool, but is it supported by speech recognition?
+---    CommOpt  : (c : Command) -> [Option c] -> S ;       -- c -o -k
 
     WhatTime   : Command ;
     WhatDate   : Command ;
     WhereNow   : Command ;
-    Remove : File -> Command ;
-    Copy   : File -> File -> Command ;
-    Linecount : File -> Command ;
-    Wordcount : File -> Command ;
+    Remove     : File -> Command ;
+    Copy       : File -> File -> Command ;
+    Linecount  : File -> Command ;
+    Wordcount  : File -> Command ;
+    Grep       : Word -> File -> Command ;
+    Cat        : File -> Command ;
 
-    Name : String -> File ;
-    It : File ;
+    It : File ;                  -- no file name - contents received from pipe
+
+    FileChars : [Chr] -> File ;
+    WordChars : [Chr] -> Word ;
+
+    FileSuffix : Word -> File ;  -- *suff
+    FilePrefix : Word -> File ;  -- pref*
 
 }