-- grammar extracted from PGSScan.mesa by PGS, October 25, 1985 9:33:52 am PDT

||CHAIN ||LISTS

||TABLE1
  1  symbol
  2  num
  3  '?
  4  '|
  5  "::="
  6  'C
  7  "||TABLE1"
  8  "||TABLE2"
  9  "||TABLE3"
 10  "||TABLE4"
 11  "||INPUT"
 12  "||CHAIN"
 13  "||LISTS"
 14  "||PRINTLR"
 15  "||PRINTLALR"
 16  "||FIRST"
 17  "||IDS"
 18  "GOAL"
 19  eof

||TABLE2
 20  grammar
 21  head
 22  ruleset
 23  directives
 24  terminals
 25  nonterminals
 26  aliases
 27  directive
 28  discard
 29  rulegroup
 30  prefix
 31  goalrule


||TABLE3
symbol        tokenID
num           tokenNUM
'?            tokenQUERY
"||TABLE3"    tokenTAB3
"||TABLE4"    tokenTAB4
'?            initialSymbol


||TABLE4

  1     0  grammar        ::= '? head ruleset 

  2     1  head           ::= directives terminals nonterminals "||TABLE4" 
  3     1                   | directives terminals nonterminals aliases "||TABLE4" 

  4     2  directives     ::= 
  5    28                   | directives directive 

  6     3  directive      ::= "||INPUT" 
  7     4                   | "||CHAIN" 
  8     5                   | "||LISTS" 
  9     6                   | "||PRINTLR" 
 10     7                   | "||PRINTLALR" 
 11     8                   | "||FIRST" 
 12     9                   | "||IDS" 

 13    10  terminals      ::= "||TABLE1" 
 14    11                   | terminals discard symbol 

 15    11  nonterminals   ::= nonterminals discard symbol 
 16    12                   | "||TABLE2" 

 17    13  aliases        ::= "||TABLE3" 
 18    14                   | aliases symbol symbol 

 19    15  discard        ::= 
 20    28                   | num 
 21    28                   | '? 

 22    16  rulegroup      ::= symbol "::=" 
 23    17                   | prefix symbol "::=" 
 24    18                   | rulegroup symbol "::=" 
 25    19                   | rulegroup prefix symbol "::=" 
 26    20                   | rulegroup '| 
 27    21                   | rulegroup prefix '| 
 28    22                   | rulegroup symbol 

 29    23  prefix         ::= num 
 30    24                   | num num 
 31    24                   | '? num 
 32    25                   | discard 'C 
 33    26                   | discard 'C num 
 34    27                   | '? 

 35 C  28  ruleset        ::= rulegroup 
 36    28                   | goalrule rulegroup 

 37    28  goalrule       ::= "GOAL" "::=" symbol symbol