--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/examples/ffcalc/ffcalcx.syn	Sat Dec 22 17:52:45 2007 -0500
@@ -0,0 +1,64 @@
+{/*   FOUR FUNCTION CALCULATOR: FFCALCX.SYN          */}
+
+// -- CONFIGURATION SECTION ----------------------------
+[
+  default token type = double
+  disregard white space
+  lexeme { real}
+  left { '+', '-'}
+  left { '*', '/'}
+  right {unary minus}
+]
+
+// -- FOUR FUNCTION CALCULATOR -------------------------
+(void) calculator $
+ -> [calculation?, '\n']..., eof
+
+(void) calculation
+ -> expression:x                      =printf("%g\n",x);
+ -> name:n, '=', expression:x                         ={
+                  printf("%c = %g\n",n+'A',value[n]=x);}
+ -> error
+
+expression
+ -> name:n                                   = value[n];
+ -> real
+ -> '(', expression:x, ')'                          = x;
+ -> expression:x, '+', expression:t               = x+t;
+ -> expression:x, '-', expression:t               = x-t;
+ -> expression:t, '*', expression:f               = t*f;
+ -> expression:t, '/', expression:f               = t/f;
+ -> unary minus, expression:f                      = -f;
+
+// -- LEXICAL UNITS ------------------------------------
+digit       = '0-9'
+eof         = -1
+unary minus = '-'
+
+(void) white space
+ -> ' ' + '\t' + '\r' + '\f' + '\v'
+ -> "/*", ~eof?..., "*/"
+
+(int) name
+ -> 'a-z' + 'A-Z':c                             = c-'A';
+
+real
+ -> integer part:i, '.', fraction part:f          = i+f;
+ -> integer part, '.'?
+ -> '.', fraction part:f                            = f;
+
+integer part
+ -> digit:d                                     = d-'0';
+ -> integer part:x, digit:d              = 10*x + d-'0';
+
+fraction part
+ -> digit:d                                =(d-'0')/10.;
+ -> digit:d, fraction part:f           =(d-'0' + f)/10.;
+
+{ /* -- EMBEDDED C ---------------------------------- */
+  double value[64];                      /* registers */
+  int main(void) {
+    ffcalcx();
+    return 0;
+  }
+} /* -- END OF EMBEDDED C ----------------------------*/