checkpoint

[sbp.git] / tests / meta.g

diff --git a/tests/meta.g b/tests/meta.g
index 43f539a..02464c3 100644 (file)
--- a/tests/meta.g
+++ b/tests/meta.g
@@ -1,59 +1,66 @@
-s             =  !ws Grammar ws              => "gram"
-Grammar       =  NonTerminal +/ ws           => "grammar"
-NonTerminal   =  word  !wp ^"=" !wp RHS
-        
-RHS           =  (Conjuncts +/ (!ws "|" !ws)) +/ (!ws ">" !ws)
-
-Conjuncts     =  Sequence
-              |  Sequence ^"&"  Elements  /ws
-              |  Sequence ^"&~" Elements  /ws
+// use 'a'-'z' or 'a-z' instead of [a-z]?
+// EOF token?
+// #include (with renaming?)
+
+s             =  ws! Grammar ws!
+
+Grammar       =  NonTerminal +/ ws
+
+NonTerminal   =  Word           "="     RHS /ws
+              |  Word  "*" ws! ^"=" ws! RHS
+              |  Word  "*/" Word ws! ^"=" ws! RHS
+       
+RHS           =  (Sequence +/ (ws! "|" ws!)) +/ (ws! ">" ws!)
+
 Elements      =  e*/ws
 
-PreSequence   = Elements => "ps"
-              | PreSequence !wp ^"/"  !ws e
-              | PreSequence     ^"->"     e /ws
-//              | (Quoted|word)   ^"::" PreSequence /ws
-              | PreSequence     ^"=>" ("[]"|"()"|word|Quoted) /ws
-Sequence      = PreSequence    => "psx"
+PreSequence   =  Elements
+              |  (Quoted|Word)   ^"::" PreSequence /ws
+              >  PreSequence     ^"/"      e       /ws
+              |  PreSequence     ^"->"     e       /ws
+
+Sequence      = psx:: PreSequence
+              |       Sequence ^"&"  Elements /ws
+              |       Sequence ^"&~" Elements /ws
 
 ec            = ~[\-\]\\]
               | escaped
 
-Range         = ec          => "range"
+Range         = ec
               | ec ^"-" ec
 
-e             =
-                (Quoted|word) ^":" e
-              >  word                          => "nonTerminal"
-              |  Quoted                        => "literal"
-              |    ^"()"
-              |    ^"{" Sequence "}"       /ws
-              |    ^"["  Range* "]"
-              |  e ^"++"                   /ws -> ~[/]
-              |  e ^"+"                    /ws -> ~[+]
-              |  e ^"++/" e                /ws        
-              |  e ^"+/"  e                /ws        
-              |  e ^"**"                   /ws -> ~[/]
-              |  e ^"*"                    /ws -> ~[*]
-              |  e ^"**/" e                /ws        
-              |  e ^"*/"  e                /ws        
-              |    ^"!"   e                /ws
-              |  e ^"?"                    /ws
-              |    ^"^" Quoted             /ws
-
-              |     "(" word         ^")"  /ws
-              >    ^"(" RHS  ")"           /ws
-              |    ^"~" e
-
-word       = [a-zA-Z0-9_]++
-Quoted     = "\"" ((~[\"\\] | escaped)+) "\""
-           | "\"\"" => ""
-escaped    = "\\n" => "\n"
-           | "\\r" => "\r"
-           | "\\" ~[nr]
+e             =                (Quoted|Word) ^":" e
+              >                NonTerminalReference
+              |                Literal
+              |                  ^"()"
+              |                  ^"{" PreSequence "}"    /ws
+              |                  ^"["  Range* "]"
+              |                e ^"++"                   /ws -> ~[/]
+              |                e ^"+"                    /ws -> ~[+]
+              |                e ^"++/" e                /ws        
+              |                e ^"+/"  e                /ws        
+              |                e ^"**"                   /ws -> ~[/]
+              |                e ^"*"                    /ws -> ~[*]
+              |                e ^"**/" e                /ws        
+              |                e ^"*/"  e                /ws        
+              |                     e ^"!"
+              |                e ^"?"                    /ws
+              |                  ^"^"   Quoted
+              >                  ^"(" RHS  ")"           /ws
+              |                  ^"~" e
+
+NonTerminalReference = Word
+Literal              = Quoted
+Word                 = [a-zA-Z0-9_]++
+Quoted               = "\"" ((~[\"\\] | escaped)+) "\""
+                     | EmptyString
+                       EmptyString = "\"\""
 
+escaped    = "\n":: "\\n"
+           | "\r":: "\\r"
+           |        "\\" ~[nr]
 
 w             = " " | "\n" | "\r"
-ws            =  w** => ()
-              |  w** "//" ~[\n]* "\n" ws => ()
+ws            =  "()":: w**
+              |  "()":: w** "//" (~[\n])* "\n" ws
 wp            =  w++