Cannot use lookahead in a macro

girl = "newborn: "/("Sara" | "Julie" | "Linda" | "Barbara")

boy = "newborn: "/("Jonathon" | "Jeff" | "Pete" | "George")

%%

{girl} { System.out.print("The baby is a girl! Her name is: "); }

{boy} { System.out.print("The baby is a boy! His name is: "); }

Notice that I am using lookahead in the macros.

This results in an error. (I believe that this is a bug

with this implementation of JFlex)

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