files in tests directory

[sbp.git] / tests / meta.g

diff --git a/tests/meta.g b/tests/meta.g
index 0920a7a..8be950d 100644 (file)
--- a/tests/meta.g
+++ b/tests/meta.g
@@ -1,54 +1,58 @@
-s         ::=  w* Grammar w*                  => "gram"
-Grammar   ::=  R+ => "grammar"
-R         ::=  word  ^"::=" Class+/gt
-            |  word ^"!::=" Class+/gt
-
-ec        ::=  [~\]\\\-\~] | escaped
-
-Class     ::=  Rewrite +/ bar                 => "alternatives"
-
-Rewrite   ::=  Rewritex
-            |  Rewritex ^"&"  E+
-            |  Rewritex ^"&~" E+
-
-Rewritex  ::=  E+                             => "rewrite"
-            |  E+ ^"=>" word
-            |  E+ ^"=>" quoted
-            |  E+  "=>" "()"                  => "wrap"
-
-range    ::= ec => "range0" | ec ^"-" ec      => "range0"
-gt   !::= ">"
-bar  !::= "|"
-E        ::= word                             => "nonTerminalY"
-           |    [(][)] => "epsilon"
-           |    ^"{" Class+/gt "}"
-           |     "[" [\~]?  range* "]"        => "range"
-           |  E ^"*/" E
-           |  E ^"+/" E
-           |  E ^"?"
-           |  E ^"~/~"
-
-           |  E ^"-"  E
-
-           |    ^"!" E
-           |     "^" quoted => "care"
-           |    ^"`" E
-           |  E ^"#"
+s         ::=  ws grammar ws                  => "gram"
+ws       !::=  w**
+wp       !::=  w++
+grammar   ::=  r +/ ws                        => "grammar"
+
+r         ::=  word  ^"::=" alternatives /ws
+            |  word ^"!::=" alternatives /ws
+
+alternatives  ::=  (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)? => "ps2"
+psy        ::= ps
+             | ps wp ^"/" ws e
+psx        ::= psy ^"?=>" e /ws
+             | psy ^"!=>" e /ws
+             > psy
+sequence   ::= quoted => "qprod"
+             > psx
+             | psx ^"=>" (word|quoted) /ws
+
+ec       ::= [~\-\]\\\~]
+           | escaped
+
+range    ::= ec          => "range"
+           | ec ^"-" ec
+
+e        ::=  word                          => "nonTerminal"
            |  quoted                        => "literal"
-
-           |  (E ^"**" > E ^"*")
-           |  (E ^"++" > E ^"+")
-
-           |     "(" word ^")"
-           >    ^"(" Class+/gt ")"
-
+           |    ^"()"
+           |    ^"{" sequence "}"       /ws
+           |    ^"["  range* "]"
+           |    ^"[~" range* "]"
+
+           |  (e ^"++"    /ws > e ^"+"    /ws)
+           |  (e ^"++/" e /ws > e ^"+/" e /ws)
+           |  (e ^"**"    /ws > e ^"*"    /ws)
+           |  (e ^"**/" e /ws > e ^"*/" e /ws)
+           |  e ^"?"                    /ws
+
+           |     "(" word         ^")"  /ws
+           >    ^"(" alternatives  ")"  /ws
 w       !::= " "
-           | "//" [~\n]* "\n"
+           | "//" ([~\n]*) "\n"
            | "\n"
            | "\r"
-an       ::= [a-zA-Z0-9_]
-word     ::= an++                           => "sify"
-quoted   ::= "\"" ([~\"\\] | escaped)* "\"" => "sify"
+word     ::= [a-zA-Z0-9_]+ !=> [a-zA-Z0-9_]
+quoted   ::= "\"" (([~\"\\] | escaped)+) "\""
+           | "\"\"" => ""
 escaped  ::= "\\n" => "\n"
            | "\\r" => "\r"
            | "\\" [~nr]
+
+