gistfile1.txt

/*constant : cexpression ;  /* good stuff! */

cexpression : csimple_expression
 | csimple_expression relop csimple_expression
 ;

csimple_expression : cterm
 | csimple_expression addop cterm
 ;

cterm : cfactor
 | cterm mulop cfactor
 ;

cfactor : sign cfactor
 | cexponentiation
 ;

cexponentiation : cprimary
 | cprimary STARSTAR cexponentiation
 ;

cprimary : identifier
 | LPAREN cexpression RPAREN
 | unsigned_constant
 | NOT cprimary
 ;

constant : non_string
 | sign non_string
 | CHARACTER_STRING
 ;

sign : PLUS
 | MINUS
 ;

non_string : DIGSEQ
 | identifier
 | REALNUMBER
 ;
 addop: PLUS
 | MINUS
 | OR
 ;

mulop : STAR
 | SLASH
 | DIV
 | MOD
 | AND
 ;

relop : EQUAL
 | NOTEQUAL
 | LT
 | GT
 | LE
 | GE
 | IN
 ;