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more conditional compilation

This commit is contained in:
r.portalez 2021-03-10 16:53:14 +01:00
parent 33e718edcc
commit e904e91972
1 changed files with 9 additions and 0 deletions
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9
src/dfa.rs
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@ -34,6 +34,7 @@ struct Transition(Edge, usize);
enum State {
Allow,
Disallow,
#[cfg(feature = "crawl-delay")]
Delay,
Intermediate,
}
@ -62,7 +63,10 @@ impl Cylon {
State::Allow => true,
State::Disallow => false,
// Intermediate states are not preserved in the DFA
#[cfg(feature = "crawl-delay")]
State::Intermediate | State::Delay => unreachable!(),
#[cfg(not(feature = "crawl-delay"))]
State::Intermediate => unreachable!(),
}
}
@ -129,6 +133,7 @@ impl Cylon {
State::Allow => 0,
State::Disallow if last_char == Some('$') => wildcard_state,
State::Disallow => 1,
#[cfg(feature = "crawl-delay")]
State::Delay => 1,
State::Intermediate => wildcard_state,
};
@ -171,6 +176,7 @@ impl Cylon {
let state = match (rule, eow) {
(Rule::Allow(..), true) => State::Allow,
(Rule::Disallow(..), true) => State::Disallow,
#[cfg(feature = "crawl-delay")]
(Rule::Delay(..), true) => State::Delay,
_ => State::Intermediate,
};
@ -201,7 +207,10 @@ impl Cylon {
});
states.push(match state {
#[cfg(feature = "crawl-delay")]
State::Allow | State::Disallow | State::Delay => state,
#[cfg(not(feature = "crawl-delay"))]
State::Allow | State::Disallow => state,
State::Intermediate => states[wildcard_state],
});
transitions.push(t);