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Associated article: Examining the Cocktail Toolbox

Tags: Tools     Open Source     Design     

					_EXAMINING THE COCKTAIL TOOLBOX_
by Rodney Bates

Listing One

  1     
  2     /* Concrete syntax */ 
  3     
  4     PARSER Parser 
  5     
  6     RULE
  7     
  8       START = CsProgram . 
  9     
 10     /* Terminal symbol: */ 
 11     
 12       TokLiteral : 
 13         [ CaValue : CARDINAL ] 
 14         { CaValue := 0 ; } . 
 15             
 16     /* Main grammar: */ 
 17     
 18       CsProgram = CsStmt .
 19     
 20       CsStmtPlus
 21         = < CsStmtPlusLast = CsStmt .
 22             CsStmtPlusMore 
 23               = CsStmt ';' CsStmtPlus . 
 24           > .
 25     
 26       CsStmt
 27         = < CsPrintStmt 
 28               = 'PRINT' ...
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