(flex.info.gz) What is the difference between YYLEX_PARAM and YY_DECL?

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(flex.info.gz) unnamed-faq-101

(flex.info.gz) FAQ

(flex.info.gz) Why do I get "conflicting types for yylex" error?

 
 What is the difference between YYLEX_PARAM and YY_DECL?
 =======================================================
 
 YYLEX_PARAM is not a flex symbol. It is for Bison. It tells Bison to
 pass extra params when it calls yylex() from the parser.
 
    YY_DECL is the Flex declaration of yylex. The default is similar to
 this:
 
 
      #define int yy_lex ()
 

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(flex.info.gz) unnamed-faq-101

(flex.info.gz) FAQ

(flex.info.gz) Why do I get "conflicting types for yylex" error?