Storing bitsets

[equinoX]

Hey folks :D

Simple question, is possible to store bitsets into a vector?
I tried something like: vector <<bitset<50>> vect;

but obviously it returned me an error, how can I solve it?

Thanks,
equinoX

[m4ster r0shi]

Try vector < bitset<50> > vect;

[equinoX]

Thanks m4ster r0shi,

Perfect ;]

[equinoX]

Interresting, I had tried this way and got an error

vector <bitset<50>> vect;

I did not know about the spaces..

vector < bitset<50> > vect;

Thanks once again r0shi

[m4ster r0shi]

I did not know about the spaces..

Yeah, I know... I've made this mistake many times... The space is necessary because if you don't put it the compiler thinks it's the >> operator... -.-

Thanks once again r0shi

No problem! Anytime! :P

[moorecm]

Yeah, I know... I've made this mistake many times... The space is necessary because if you don't put it the compiler thinks it's the >> operator... -.-

This is known as the maximum munch principle, applied during lexical analysis. It basically states to match each token greedily (the most possible valid adjacent characters).

So, since > and >> are both valid tokens, the lexer will grab >> anytime it can over 2 separate > tokens. The whitespace differentiates this situation.

I just recently wrote a C++ lexer in Perl for my website matching valid tokens with regular expressions and I had to be sure that it would prefer the longer tokens over the shorter ones... It kind of makes sense if you think about it.

[m4ster r0shi]

@moorecm
Thank you for the wonderful explanation! :D

[moorecm]

No problem.

It kind of makes sense if you think about it.

I thought about it a little more...it's an intriguing process.

The lexer's sole purpose is to tokenize the language constructs. It does not know which tokens would be valid in any given context. In order to make it smart enough to know better, the lexer and the parser would have to be merged. So that explains why it isn't just fixed to know better...it would make the already ridiculously complex parser even more difficult to maintain.