#! /usr/bin/env python
# encoding: utf-8

import TaskGen
def decide_ext(self,node):
	if'cxx'in self.features:return'.lex.cc'
	else:return'.lex.c'
TaskGen.declare_chain(name='flex',rule='${FLEX} -o${TGT} ${FLEXFLAGS} ${SRC}',ext_in='.l',ext_out='.c .cxx',decider=decide_ext)
def detect(conf):
	conf.find_program('flex',var='FLEX',mandatory=True)
	conf.env['FLEXFLAGS']=''