checkpoint

[sbp.git] / tests / meta.g

diff --git a/tests/meta.g b/tests/meta.g
index 8c3a343..349be33 100644 (file)
--- a/tests/meta.g
+++ b/tests/meta.g
@@ -1,54 +1,61 @@
-s         ::=  w* Grammar w*                  => "gram"
-Grammar   ::=  R+ => "grammar"
-R         ::=  word  ^"::=" Alternatives
-            |  word ^"!::=" Alternatives
-
-ec        ::=  [~\]\\\-\~] | escaped
-
-Alternatives  ::=  EquiAlt   +/ ">"
-EquiAlt       ::=  Conjuncts +/ "|"                 => "alternatives"
-
-Sequence    ::= E+
-Conjuncts   ::=  Rewrite
-              |  Rewrite ^"&"  Sequence
-              |  Rewrite ^"&~" Sequence
-
-Rewrite  ::=  Sequence                             => "rewrite"
-           |  Sequence ^"=>" word
-           |  Sequence ^"=>" quoted
-           |  Sequence  "=>" "()"                  => "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"
+s           ::=  Grammar ws                  => "gram"
+Grammar     ::=  NonTerminal +/ ws           => "grammar"
+NonTerminal ::=  word  ^"::=" RHS /ws
+
+w        ::= " " | "\n" | "\r"
+ws        ::=  w** => ()
+            |  w** "//" ~[\n]* "\n" ws => ()
+wp        ::=  w++
+
+RHS        ::=  (Conjuncts +/ (!ws "|" !ws)) +/ (!ws ">" !ws)
+
+Conjuncts  ::=  Sequence
+             |  Sequence ^"&"  e*/ws   /ws
+             |  Sequence ^"&~" e*/ws   /ws
+
+ps         ::= e*/ws                              => "ps"
+             | (e+/ws !ws)? ^"^" Quoted (!ws e+/ws)?
+psy        ::= ps
+             | ps !wp ^"/" !ws e
+psx        ::= psy                   => "psy"
+             | psy ^"->" e /ws
+Sequence   ::= Quoted => "qprod"
+             > psx => "psx"
+             | psx  "=>" ^"[]"         /ws
+             | psx ^"=>" ("()"|word|Quoted) /ws
+
+ec       ::= ~[\-\]\\]
+           | escaped
+
+Range    ::= ec          => "range"
+           | ec ^"-" ec
+
+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
+
+           |     "(" word         ^")"  /ws
+           >    ^"(" RHS  ")"           /ws
+           |    ^"~" e
+
+word     ::= [a-zA-Z0-9_]++
+Quoted   ::= "\"" ((~[\"\\] | escaped)+) "\""
+           | "\"\"" => ""
 escaped  ::= "\\n" => "\n"
            | "\\r" => "\r"
-           | "\\" [~nr]
+           | "\\" ~[nr]
+
+