X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=tests%2Fmeta.g;h=216d3bfd165b98147de511061d39fe9675494fcb;hb=b8a597c8d1a29afc24f9b89f726d5b1a9b9aeec1;hp=138ec62a9c7ef708b6ea747c502a94c241e95500;hpb=f491592fb43d4fd68221db2b893baaede4cfdaca;p=sbp.git

diff --git a/tests/meta.g b/tests/meta.g
index 138ec62..216d3bf 100644
--- a/tests/meta.g
+++ b/tests/meta.g
@@ -1,59 +1,73 @@
-s         ::=  ws grammar ws                  => "gram"
-ws       !::=  w**
-grammar   ::=  r+/ws => "grammar"
-r         ::=  word  ^"::=" alternatives /ws
-            |  word ^"!::=" alternatives /ws
-
-ec        ::=  [~\]\\\-\~] | escaped
-
-alternatives  ::=  equiAlt   +/ (ws ">" ws)
-equiAlt       ::=  conjuncts +/ (ws "|" ws)          => "alternatives"
-
-sequence    ::= Es
-              > Es ^"/" E   /ws
-Es          ::= E+
-//es          ::= E+/ws
-
-conjuncts   ::=  rewrite
-              |  rewrite ^"&"  sequence   /ws
-              |  rewrite ^"&~" sequence   /ws
-
-rewrite  ::=  sequence                  /ws        => "rewrite"
-           |  sequence ^"=>" word       /ws
-           |  sequence ^"=>" quoted     /ws
-           |  sequence  "=>" "()"       /ws        => "wrap"
-
-range    ::= ec => "range0" | ec ^"-" ec      => "range0"
-E        ::= word                             => "nonTerminalY"
-           |    [(][)] => "epsilon"
-           |    ^"{" alternatives "}"
-           |     "[" [\~]?  range* "]"        => "range"
-           |  E ^"*/" E
-           |  E ^"+/" E
-           |  E ^"?"
-           |  E ^"~/~"
-
-           |  E ^"-"  E
-
-           |    ^"!" E
-           |     "^" quoted => "care"
-           |    ^"`" E
-           |  E ^"#"
-           |  quoted                        => "literal"
-
-           |  (E ^"**" > E ^"*")
-           |  (E ^"++" > E ^"+")
-
-           |     "(" word ^")"
-           >    ^"(" alternatives ")"
-
-w       !::= " "
-           | "//" [~\n]* "\n"
-           | "\n"
-           | "\r"
-an       ::= [a-zA-Z0-9_]
-word     ::= an++                           => "sify"
-quoted   ::= "\"" ([~\"\\] | escaped)* "\"" => "sify"
-escaped  ::= "\\n" => "\n"
-           | "\\r" => "\r"
-           | "\\" [~nr]
+// use 'a'-'z' or 'a-z' instead of [a-z]?
+// EOF token?
+// #include (with renaming?)
+
+s             =  ws! Grammar ws!
+
+Grammar       =  Declaration +/ ws
+
+Declaration   =  NonTerminal
+              |  ^"#import" ws! FileName (ws! "as" ws! Word)?
+
+FileName      = FileNameChar+ -> [\r\n ]
+FileNameChar  = Space:: "\\ "
+              | ~[\r\n ]
+
+NonTerminal   =  Word           "="     RHS /ws
+              |  Word  "*" ws! ^"=" ws! RHS
+              |  Word  "*/" Word ws! ^"=" ws! RHS
+       
+RHS           =  (Sequence +/ (ws! "|" ws!)) +/ (ws! ">" ws!)
+
+Elements      =  e*/ws
+
+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
+              | ec "-" ec
+
+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
+wp            =  w++