lex.jam

C++的一个好库。。。现在很流行

#  Copyright (C) Vladimir Prus 2002. Permission to copy, use, modify, sell and
#  distribute this software is granted provided this copyright notice appears in
#  all copies. This software is provided "as is" without express or implied
#  warranty, and with no claim as to its suitability for any purpose.

import type ;
import generators ;
import feature ;
import property ;


feature.feature flex.prefix : : free ;
type.register LEX : l ;
type.register LEX++ : ll ;
generators.register-standard lex.lex : LEX : C ;
generators.register-standard lex.lex : LEX++ : CPP ;

rule init ( )
{
}

rule lex ( target : source : properties * )
{   
    local r = [ property.select flex.prefix : $(properties) ] ;
    if $(r)
    {
        PREFIX on $(<) = $(r:G=) ;
    }
}

actions lex 
{
    flex -P$(PREFIX) -o$(<) $(>)    
}