On Wed, 18 Jul 2007, ÌÕœÝ Tao Jie wrote:
Dear all:
There're two lexical analyzer generator in Solaris/OpenSolaris
/usr/ccs/bin/lex
/usr/sfw/bin/flex
What's the difference between these 2 tools? Are they replaceable?
http://flex.sourceforge.net/manual/Lex-and-Posix.html#Lex-and-Posix
Thanks in advance.
p.s. And what about yacc and bison?
Bison's manual claims that 'bison -y' accepts yacc input, and bison were
'upward compatible' with yacc. That means parsers written for yacc can be
instantiated with bison. The reverse may or may not be true - depending on
whether bison features have been used that yacc doesn't have.
Although the bison manual isn't very clear on where exactly the
differences are, i.e. what bison constructs might need to be avoided.
FrankH.
Regards
TJ
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