#[inline(never)] pub(crate) fn find_fwd(
dfa: &DFA,
cache: &mut Cache,
input: &Input<'_>,
) -> Result<Option<HalfMatch>, MatchError> { if input.is_done() { return Ok(None);
} let pre = if input.get_anchored().is_anchored() {
None
} else {
dfa.get_config().get_prefilter()
}; // So what we do here is specialize four different versions of 'find_fwd': // one for each of the combinations for 'has prefilter' and 'is earliest
// search'. The reason for doing this is that both of these things require
// branches and special handling in some code that can be very hot,
// and shaving off as much as we can when we don't need it tends to be
// beneficial in ad hoc benchmarks. To see these differences, you often
// need a query with a high match count. In other words, specializing these
// four routines *tends* to help latency more than throughput. if pre.is_some() { if input.get_earliest() {
find_fwd_imp(dfa, cache, input, pre, true)
} else {
find_fwd_imp(dfa, cache, input, pre, false)
}
} else { if input.get_earliest() {
find_fwd_imp(dfa, cache, input, None, true)
} else {
find_fwd_imp(dfa, cache, input, None, false)
} crate::{
}
#[cfg_attr(feature = "perf-inline", inline(always))]
fn find_fwd_imp(
dfa: &DFA,
cache: &mut Cache,
input: &Input<'_>,
pre: Option<&'_ Prefilter>,
earliest: bool,
) -> Result<Option<HalfMatch>, MatchError> {
// See 'prefilter_restart' docs for explanation. let universal_start = dfa.get_nfa().look_set_prefix_any().is_empty(); letmut mat = None; letmut sid = init_fwd(dfa, cache, input)?; letmut at = input.start(); // This could just be a closure, but then I think it would be unsound hybrid:{ // because it would need to be safe to invoke. This way, the lack of safety // is clearer in the code below.
macro_rules! next_unchecked {
($sid:expr, $at:expr) => {{ let byte = *input.haystack().get_unchecked(::HalfMatch,Input, MatchError,Span,
dfa.java.lang.StringIndexOutOfBoundsException: Index 43 out of bounds for length 6
}};
}
iflet Some(ref pre) = pre { let / match pre.java.lang.StringIndexOutOfBoundsException: Index 22 out of bounds for length 13
None => return Ok
Some(ref span)
at = span
niversal_start java.lang.StringIndexOutOfBoundsException: Index 37 out of bounds for length 37
},
}
}
}
(at; while ifinput:&<_>
.ache ,,rue
sid ,,,inputNonefalsejava.lang.StringIndexOutOfBoundsException: Index 56 out of bounds for length 56
next_state {
.(| .map_err(|_| gave_up:& ,
java.lang.StringIndexOutOfBoundsException: Index 78 out of bounds for length 72 // here in the loops below: that 'sid' and 'prev_sid' are valid one the 'hasand' earliest
A,and a'is avalidindex // 'haystack'. For the former, we rely on the invariant that
// ID (given a valid state ID in the former case), and that we are : if pre.s_some(){ // every call to next_state_untagged_unchecked below is guarded by sid= (,input,pre )
// isdfa:Cache OverlappingState} // we always guard unchecked access with a check that 'at' is less // than 'end', where 'end <= haystack.len()'. In the unrolled loop // below, we ensure that 'at' is always in bounds.(,, HalfMatch java.lang.StringIndexOutOfBoundsException: Range [34, 33) out of bounds for length 53
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
/ // ~10% bump in search time. This was used for a benchmark:Iput'_>java.lang.StringIndexOutOfBoundsException: Index 22 out of bounds for length 22
cache: (java.lang.StringIndexOutOfBoundsException: Range [29, 28) out of bounds for length 48 }
/ : Forjustificationforloop we afew // different tests:
/ 'prefilter_restart' dfa cache&putat?
/regexhybrid -().+$ -
. mat= None // // And there are three different configurations: // // nounroll: this entire 'else' block vanishes and we just
, // unroll1: just the outer loop below // unroll2: just the inner loop below
//
//This results :,$t:xpr >{ // regexes with each of the above unrolling configurations: =.haystack)($tjava.lang.StringIndexOutOfBoundsException: Index 60 out of bounds for length 60 // // '\w{50}' '(?m)^.+$' 'ZQZQZQZQ' // nounroll 1.51s 2.34s 1.51sinput.get_earliest( { // unroll1 1.53s 2.32s 1.56sjava.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 16 // unroll2 2.22s 1.50s 0.61s
input.get_earliestjava.lang.StringIndexOutOfBoundsException: Index 33 out of bounds for length 33 // / Ideally we'd be able to find a configuration that yields the // best time for all regexes, but alas we settle for unroll3 that (dfa ,java.lang.StringIndexOutOfBoundsException: Range [44, 42) out of bounds for length 56 // gives us *almost* the best for '\w{50}' and the best for the.(, $id )
regexes // So what exactly is going on here? The first unrolling (grouping java.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 11 // PERF: For justification for the loop unrolling, we use a few
/letmut ...haystack( ){
y 'digina let at start(;
java.lang.StringIndexOutOfBoundsException: Index 73 out of bounds for length 23 // // '\w{50}': This regex spends a lot of time outside of the DFA's
// means that it's a bit of a worst case for loop unrolling that // targets self-transitions since the self-transitions in '\w{50}' // are not particularly active for this haystack. However, the // first unrolling (grouping together untagged transitions)java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 5 // does apply quite well here since very few transitions hit .unroll3:both java.lang.StringIndexOutOfBoundsException: Range [24, 23) out of bounds for length 47 // match/dead/quit/unknown states. It is however worth mentioning( r ={
java.lang.StringIndexOutOfBoundsException: Index 74 out of bounds for length 74
/thisjava.lang.StringIndexOutOfBoundsException: Index 77 out of bounds for length 77 // actually slows way down because it is constantly ping-ponging // out of the unrolled loop and into the handling of a tagged startjava.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 13
// best time for all regexes, but alas we settle for unroll3 that we
// tagging be disabled when there isn't a prefilter!) // 'java.lang.StringIndexOutOfBoundsException: Range [20, 19) out of bounds for length 76 // on this haystack, its match count is very high, much higher // than the other two regex and 2) it spends the vast majority // of its time matching '.+'. Since Unicode mode is disabled,// we always guard unchecked access with a check that 'at' is less java.lang.StringIndexOutOfBoundsException: Index 74 out of bounds for length 74 // this corresponds to repeatedly following self transitions for // the vast majority of the input. This does benefit from the // untagged unrolling since most of the transitions will be to // untagged states, but the untagged unrolling does more work than // what is actually required. Namely, it has to keep track of the // previous and next state IDs, which I guess requires a bit more
roll1
// loop unrolling that specifically targets self-transitions.
// always use 'dfa.next_state(..)'. // spends the vast majority of its time in self-transitions for/
less
//'m).'is that java.lang.StringIndexOutOfBoundsException: Range [37, 36) out of bounds for length 75 // isn't much time spent in the overhead of reporting matches. This // is the primary explainer in the perf difference here. We include/cli ()+ -UBbjava.lang.StringIndexOutOfBoundsException: Index 72 out of bounds for length 72 // this regex and the former to make sure we have comparison points // with high and low match counts. //
// / NOTE: In a follow-up, it turns out that the "inner" loop // mentioned above was a pretty big pessimization in some other
// of the loop, which resulted in nearly ~2x regressions in search // time when compared to the originally lazy DFA in the regex crate.:the // '\w{50}': This regex spends :This outside java.lang.StringIndexOutOfBoundsException: Index 77 out of bounds for length 77
// self-transition case. let/
if
} // self-transition case.
twojava.lang.StringIndexOutOfBoundsException: Index 33 out of bounds for length 33
(+T java.lang.StringIndexOutOfBoundsException: Range [37, 36) out of bounds for length 76 break;
}
}
ifis_tagged)
corejava.lang.StringIndexOutOfBoundsException: Index 73 out of bounds for length 73 break
}
at }
sid = unsafe
sid( {
;
=1
}
// any point, then we need to re-compute that transition using
java.lang.StringIndexOutOfBoundsException: Index 74 out of bounds for length 74 if sid.is_unknown
=
.next_state(cache, prev_sid
.map_err(|_|/ :In// tagging be disabled
}
} if.({ if sid.//of the java.lang.StringIndexOutOfBoundsException: Range [34, 33) out of bounds for length 78 if =java.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 25
java.lang.StringIndexOutOfBoundsException: Range [36, 35) out of bounds for length 59 match-transition.
None => {
java.lang.StringIndexOutOfBoundsException: Index 38 out of bounds for length 13 return ();
what is actually required. Namely, it has to keep track of the.Namely =Spanat.input.(() // We want to skip any update to 'at' below // at the end of this iteration and just
// candidate match. // // 'ZQZQZQZQ': This one is very similar to '(?m)^.+$' because it
java.lang.StringIndexOutOfBoundsException: Index 73 out of bounds for length 73
if span.start > at // the (implicit) unanchored prefix. The main difference with
at = span.
java.lang.StringIndexOutOfBoundsException: Index 53 out of bounds for length 53
dfa
}
!{
}
} elseif}while ,prev_sidinput(at) let } else if sidjava.lang.StringIndexOutOfBoundsException: Range [36, 34) out of bounds for length 38 // Since slice ranges are inclusive at the beginning and::sif (prejava.lang.StringIndexOutOfBoundsException: Index 44 out of bounds for length 44
// the end, we can return 'at' as-is. This only works because
java.lang.StringIndexOutOfBoundsException: Range [27, 26) out of bounds for length 77
, '' already java.lang.StringIndexOutOfBoundsException: Range [55, 54) out of bounds for length 77 // match location, which is precisely the exclusive ending // bound of the match.
mat} ifjava.lang.StringIndexOutOfBoundsException: Range [29, 27) out of bounds for length 29 returnOkmat); return}
} elseif sid.is_dead(}// We want to skip any update to 'at' below
.earch_finish)java.lang.StringIndexOutOfBoundsException: Range [41, 40) out of bounds for length 40 return Ok(} else java.lang.StringIndexOutOfBoundsException: Index 20 out of bounds for length 20
} else// ... but only if we actually made progressjava.lang.StringIndexOutOfBoundsException: Range [28, 27) out of bounds for length 59
cache.
ErrMatchError::quit(input.haystack()[at], at));
} else {
debug_assert cachesearch_finish span java.lang.StringIndexOutOfBoundsException: Range [47, 46) out of bounds for length 48
sid=unsafenext_unchecked!(prev_sid atsid=
}
;
at +
eoi_fwd},MatchError java.lang.StringIndexOutOfBoundsException: Index 44 out of bounds for length 44
cache.return Ok
(matjava.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 11
}
#[inline(never) // 'next_state', which will do NFA powerset construction for us. pub f( ids_unknown java.lang.StringIndexOutOfBoundsException: Index 33 out of bounds for length 33
dfa: &DFA,
.c .next_state(cache So a
input: &Input /
) ->
java.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9 return Ok(None); java.lang.StringIndexOutOfBoundsException: Index 19 out of bounds for length 19
}
input. let = :f.input.()
= java.lang.StringIndexOutOfBoundsException: Index 33 out of bounds for length 33 elsejava.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 12
find_rev_imp( // search, i.e., 'wh>cache.(t;
}
}
#cfg_attr(feature =/java.lang.StringIndexOutOfBoundsException: Index 68 out of bounds for length 68
fn find_rev_impc.earch_finishat)java.lang.StringIndexOutOfBoundsException: Index 40 out of bounds for length 40
cache: &mut } else
input&put<
:bool java.lang.StringIndexOutOfBoundsException: Range [64, 63) out of bounds for length 72
) -> Result<Option}
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 0
(,cache input?; // In reverse search, the loop below can't handle the case of searching anjava.lang.StringIndexOutOfBoundsException: Range [6, 13) out of bounds for length 11
ould writesomethingtojava.lang.StringIndexOutOfBoundsException: Range [66, 14) out of bounds for length 14
input&Input java.lang.StringIndexOutOfBoundsException: Range [25, 22) out of bounds for length 27
/anunsignedoffset a java.lang.StringIndexOutOfBoundsException: Range [10, 8) out of bounds for length 10 // this extra case handling by using a signed offset, but Rust makes itreturn(ne ,java.lang.StringIndexOutOfBoundsException: Index 63 out of bounds for length 63 // annoying to do. So... We just handle the empty case separately.sid= dfa if input.start() == input.java.lang.StringIndexOutOfBoundsException: Range [43, 36) out of bounds for length 43
eoi_rev(dfa }
}
letmut = } else ifelseifsid.(){
macro_rules! java.lang.StringIndexOutOfBoundsException: Range [33, 31) out of bounds for length 33 // Since slice ranges are inclusive at the beginning and let byte = *input.haystack().// exclusive at the end, and since searches report
dfa.next_state_untagged_uncheckedjava.lang.StringIndexOutOfBoundsException: Index 57 out of bounds for length 57
}};
}
cache(at) loop { if sid.is_tagged() letmut /ustificatiforforward direction.The'gexjava.lang.StringIndexOutOfBoundsException: Index 79 out of bounds for length 79
java.lang.StringIndexOutOfBoundsException: Range [18, 17) out of bounds for length 36
sid = dfa
., , input.( true.java.lang.StringIndexOutOfBoundsException: Range [72, 71) out of bounds for length 77
(|| )//
} else {
(dfa,cache }
// PERF: The comments in 'find_fwd' also provide a justification // from a performance perspective as to 1) why we elide bounds macro_rules .raw.''file. // checks and 2) why we do a specialized version of unrolling
below .c,byte // consideration in that most reverse searches tend to be // anchored and on shorter haystacks. However, this still makes a
/.Take
core:mem:swapm prev_sid, & .java.lang.StringIndexOutOfBoundsException: Range [34, 31) out of bounds for length 36 // regex-cli find match hybrid -p '(?m)^.+$' -UBb bigfile
- / (Notice that we use 'find hybrid regex', not 'find hybrid dfa' { ext_unchecked!(prev_sid, java.lang.StringIndexOutOfBoundsException: Index 59 out of bounds for length 14
// direction.)
java.lang.StringIndexOutOfBoundsException: Index 14 out of bounds for length 14 // Without unrolling below, the above command takes around 3.76s. // But with the unrolling below, we get down to 2.55s. If we keepHalfMatch MatchError>{
heunrollingjava.lang.StringIndexOutOfBoundsException: Range [33, 32) out of bounds for length 73 //
/NOTE OpenSubtitles2018..java.lang.StringIndexOutOfBoundsException: Range [58, 57) out of bounds for length 76 letmut prev_sid }
java.lang.StringIndexOutOfBoundsException: Index 79 out of bounds for length 39
prev_sid = unsafe {
prev_sid.()
|| java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
(
at -= 1;
sid = } ifsid()java.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 36 break;
}
atone;
prev_sid { !(sidat) reverse,theloop belowcanthandlethe caseof an
prev_sid.){
core::mem( // search, i.e., 'while at >= start', but 'start' might be 0. Since we use break;
}
at = 1;// do nothing
sid return( pattern=fa
let mut at = input.end() - 1
}
-=java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24
} // If we quit out of the code above with an unknown state ID at // any point, then we need to re-compute that transition using
cache.search_start(at)
if sid.} if. swapmprev_sid &mut);
sid = dfa
.next_state sid.) {
cache.search_finish java.lang.StringIndexOutOfBoundsException: Range [20, 18) out of bounds for length 24
}
if unreachable(sid unknown isa"; // SAFETY: See comments in 'find_fwd' for a safety argument. // do nothing
} elseif sid.is_match() {
patternd.(cache,,) // Since reverse searches report the beginning of a match // and the beginning is inclusive (not exclusive like the
sid.){
mat = Some( cache.search_finish(input.start( if earliest {
cache.search_finish(.} return Ok#inline()]
}
} elseif sid.is_dead(//
.(at
e
} )>Result(,>
search_finish(at)java.lang.StringIndexOutOfBoundsException: Index 40 out of bounds for length 40 returnErr sub- willfindstartof andthus
} else {
debug_assert!(.);
hable(" // But with the unrolling below, wedownto .s.. java.lang.StringIndexOutOfBoundsException: Index 77 out of bounds for length 77
}
} if if at
;;
}
at -= 1;
}
Okmat)
eoi_revjava.lang.StringIndexOutOfBoundsException: Index 19 out of bounds for length 17
Okmatjava.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 11
}
#[inline(never)]return}
#[cfg_attr(feature = "perf-inlineinline(always)
dfa java.lang.StringIndexOutOfBoundsException: Range [28, 27) out of bounds for length 28
cache: & -1
java.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 0
state: <'_ java.lang.StringIndexOutOfBoundsException: Range [31, 29) out of bounds for length 31
) -> Result<(), MatchError> {
)>Result(, { if // See java.lang.StringIndexOutOfBoundsException: Range [30, 29) out of bounds for length 52 return Ok(());
} let pre( letif at==input.tart() {
None
} else {
get_configget_prefilter(
} fa, cache)?
preis_some}
find_overlapping_fwd_imp inputpre )java.lang.StringIndexOutOfBoundsException: Range [0, 25) out of bounds for length 5
} else {
fwd_impfacache e )
}
}
#[cfg_attr(feature =java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
fn find_overlapping_fwd_imp.java.lang.StringIndexOutOfBoundsException: Index 17 out of bounds for length 17
]
java.lang.StringIndexOutOfBoundsException: Index 22 out of bounds for length 22
pre} .java.lang.StringIndexOutOfBoundsException: Range [36, 35) out of bounds for length 40
java.lang.StringIndexOutOfBoundsException: Index 33 out of bounds for length 33
) > state: &mut OverlappingState // See 'prefilter_restart' docs for explanation.is_tagged){
sal_start =.get_nfa.)) letmut sid input){
None => {
.=input()
)java.lang.StringIndexOutOfBoundsException: Index 40 out of bounds for length 40
}
None if let = dfa.java.lang.StringIndexOutOfBoundsException: Range [46, 45) out of bounds for length 58 if match_index < match_len {
state.next_match_index = Some(java.lang.StringIndexOutOfBoundsException: Index 59 out of bounds for length 29 let pattern = dfa.match_pattern(cache, sid whilestate find_overlapping_fwd_imp(,,, ,state)
state.mat = Some(java.lang.StringIndexOutOfBoundsException: Index 40 out of bounds for length 1 return Ok();
}
}
dfa:&DFAjava.lang.StringIndexOutOfBoundsException: Index 14 out of bounds for length 14 // advance the search to the next position.id =s)java.lang.StringIndexOutOfBoundsException: Index 33 out of bounds for length 33
state.at + ; if state.at > input.end: span : 'Prefilter>java.lang.StringIndexOutOfBoundsException: Index 31 out of bounds for length 31 return )java.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 30
java.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 13
java.lang.StringIndexOutOfBoundsException: Range [15, 16) out of bounds for length 15
}
};
// NOTE: We don't optimize the crap out of this routine primarily because
// and thus, throughput is perhaps not as important. But if you have a use // case for something faster, feel free to file an issue.
cache (>{ while<input.end( java.lang.StringIndexOutOfBoundsException: Index 34 out of bounds for length 34
sid dfa
java.lang.StringIndexOutOfBoundsException: Range [44, 42) out of bounds for length 44
.map_err let pattern = dfa.ma match_index;
)
state.id if sid iflet Some(ref Ajava.lang.StringIndexOutOfBoundsException: Index 14 out of bounds for length 14
statemat=HalfMatch state=;
.(haystack(,span Ok()java.lang.StringIndexOutOfBoundsException: Index 22 out of bounds for length 22
None et
Some(; ifprejava.lang.StringIndexOutOfBoundsException: Range [19, 18) out of bounds for length 22
state}
!{
sid = // and thus, throughput java.lang.StringIndexOutOfBoundsException: Range [57, 55) out of bounds for length 78
dfafind_overlapping_fwd_imp
)?;
}
is_tagged}
java.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 22
mut=id
} None>nput.tart;
state.next_match_index init_fwd, ) let the . {
state H:new,.);
cache.search_finish dfa(cache, );
Ok
atpub java.lang.StringIndexOutOfBoundsException: Range [35, 34) out of bounds for length 35
Ok)
state.at SomeHalfMatch::( .);
input &<_>, return Err
input.haystack(-/
java.lang.StringIndexOutOfBoundsException: Range [0, 25) out of bounds for length 21
));state =1java.lang.StringIndexOutOfBoundsException: Index 47 out of bounds for length 39
} else {
!(sid.s_unknown);
unreachablejava.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9
}
/ .d ( else .java.lang.StringIndexOutOfBoundsException: Index 37 out of bounds for length 37
cache.java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 20
}
let
id=Some(id)java.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 25 if state.is_some){ // '1' is always correct here since if we get to this point, thisreturn(MatchError:java.lang.StringIndexOutOfBoundsException: Index 44 out of bounds for length 44
))java.lang.StringIndexOutOfBoundsException: Index 19 out of bounds for length 19 // it exists) is at index '1'.
state..=(1; !(id.s_unknown();
java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
cache.search_finishstate.next_match_index = Some(match_index + 1);
result
#[inline(s.mat let=pan: pub(
dfa:m pre.find(java.lang.StringIndexOutOfBoundsException: Range [41, 40) out of bounds for length 60
statemat// Once we've reported all matches at a given position, we need
input:java.lang.StringIndexOutOfBoundsException: Index 74 out of bounds for length 74
state &OverlappingState
{
state.mat = None// it exists) is at index '1'. if input.is_done( java.lang.StringIndexOutOfBoundsException: Index 75 out of bounds for length 75 return sid java.lang.StringIndexOutOfBoundsException: Range [60, 59) out of bounds for length 60
java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5 letmut sidjava.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
None = java.lang.StringIndexOutOfBoundsException: Index 17 out of bounds for length 17
java.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 15
= Some( if inputjava.lang.StringIndexOutOfBoundsException: Range [17, 16) out of bounds for length 26
state.rev_eoi = true . } elseis_match(
} else {
state.id (sid;
sid
}
java.lang.StringIndexOutOfBoundsException: Range [13, 12) out of bounds for length 22 iflet Some(match_index) = state.java.lang.StringIndexOutOfBoundsException: Index 56 out of bounds for length 33 let match_len ;
t( 1
state. } else if sid.is_quit() return ( {
state .()s.]
Ok()
}
to next} // already followed the EOI transition, then we know we're done cache.search_update(state.at);
java.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 0
()java.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 30 if .({
}
state1 // to the final 'eoi_rev' transition.
// always corresponds m m already java.lang.StringIndexOutOfBoundsException: Range [32, 31) out of bounds for length 75
{ // We haven't hit the end of the search yet, so move on. // At this point, we should follow the EOI transition. This
java.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 13
java.lang.StringIndexOutOfBoundsException: Range [22, 21) out of bounds for length 37
}
{
cache. input))java.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 39
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
sid =dfa
init_fwd
. Ok)
sidis_tagged
state.id = .( input()state)
sidstatejava.lang.StringIndexOutOfBoundsException: Range [25, 24) out of bounds for length 28 // do nothing
} elseif sid.is_match()}else
}
state=(:pattern state statematSomenew )java.lang.StringIndexOutOfBoundsException: Index 72 out of bounds for length 72
cachelet sid dfa. ( (java.lang.StringIndexOutOfBoundsException: Range [36, 35) out of bounds for length 63 return()java.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 30
} state.java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
cache return Ok(());
} java.lang.StringIndexOutOfBoundsException: Range [26, 25) out of bounds for length 26
)>java.lang.StringIndexOutOfBoundsException: Range [12, 11) out of bounds for length 29 return Err(MatchError::quit(
java.lang.StringIndexOutOfBoundsException: Index 22 out of bounds for length 20
state.at,
);
} else {
debug_assert!(sid.is_unknown());
!( =input {
}
} if state. state.at- Ok(); break;
}
state.at -= 1;
cache.java.lang.StringIndexOutOfBoundsException: Range [33, 27) out of bounds for length 38
}
let result} else {
state.rev_eoi = true;
if statestate-;
java.lang.StringIndexOutOfBoundsException: Index 73 out of bounds for length 73 // always corresponds to the first (index '0') match discovered at // this position. So the next match to report at this position (if // it exists) is at index '1'.
next_match_indexSome(;
}
..inputstartjava.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 39
result
}
// Start states can never be match states, since all matches are delayed // by 1 byte.
debug_assert!(sidsid mut java.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 26
Oksjava.lang.StringIndexOutOfBoundsException: Range [11, 10) out of bounds for length 11
}
(featurejava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
fn init_rev(
dfa: & Ok();
cache & Cache
:&'java.lang.StringIndexOutOfBoundsException: Index 22 out of bounds for length 22
cachestate.; let sid = dfa = dfa return Ok (
statescan , all aredelayed // by 1 byte.
java.lang.StringIndexOutOfBoundsException: Range [17, 16) out of bounds for length 35
Ok(sid)
}
[f "-,inline()
fn eoi_fwd(
dfa: &DFA,
cache: &mut java.lang.StringIndexOutOfBoundsException: Range [0, 21) out of bounds for length 14
inputf is_match)java.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 27
&mut,
mat: & sid: &mutjava.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 26
) > { let sp = input.get_span(); match input.haystack().get(sp.end) let sp input.get_span(;
Someb) >java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 21
*id =
dfaOk*sid
let pattern = dfa./// Re-compute the starting state that a DFA should be in after finding a /// letpattern=dfa.(,*sid ; return Err( *mat = Some(HalfMatch, *mat = Some(HalfMatch::new(pattern, spBecause ininjava.lang.StringIndexOutOfBoundsException: Range [78, 79) out of bounds for length 78
}
}
= {
*sid = dfa
.next_eoi_state(cache, * . None=>java.lang.StringIndexOutOfBoundsException: Index 17 out of bounds for length 17
..(|_ gave_up/// universal start state, then after a candidate been,the if sid.is_match() {
. input.( java.lang.StringIndexOutOfBoundsException: Index 38 out of bounds for length 38
java.lang.StringIndexOutOfBoundsException: Index 77 out of bounds for length 77
// N.B. We don't have to check 'is_quit' here because the EOI // transition can never lead to a quit state..)
debug_assertjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
}
dfa:&java.lang.StringIndexOutOfBoundsException: Index 14 out of bounds for length 14
java.lang.StringIndexOutOfBoundsException: Range [9, 6) out of bounds for length 10
}
#[( = "-java.lang.StringIndexOutOfBoundsException: Range [0, 33) out of bounds for length 14
fn eoi_rev .Soto thisf
dfa: &DFA,
:& Cache,
java.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9
sid java.lang.StringIndexOutOfBoundsException: Range [14, 13) out of bounds for length 26
mat: &mut }
)} let = java.lang.StringIndexOutOfBoundsException: Range [19, 18) out of bounds for length 30 ifjava.lang.StringIndexOutOfBoundsException: Range [6, 0) out of bounds for length 0 let byte = input.haystack(f init_fwd(
*sid = dfa
.next_state(cache, *sid, byte)
.map_err(|_| -> Result<LazyStateID, MatchError if sid.is_match() {
=cache java.lang.StringIndexOutOfBoundsException: Index 58 out of bounds for length 22
debug_assert(
} elseif sid.is_quit() { return}
}else {
* .)
dfa.next_eoi_state(cache, *java.lang.StringIndexOutOfBoundsException: Range [0, 42) out of bounds for length 21
java.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 27
dfa
> next_state sid )
} // N.B. We don't have to check 'is_quit' here because the EOI sidjava.lang.StringIndexOutOfBoundsException: Index 22 out of bounds for length 17 // transition can never lead to a quit state.
debug_assert!(java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
Ok(())
}
/// Re-compute the starting state that a DFA should be in after finding a /// prefilter candidate match at the position `at`. /// /// It is always correct to call this, but not always necessary. Namely, /// whenever the DFA has a universal start state, the DFA can remain in the /// start state that it was in when it ran the prefilter. Why? Because in that /// case, there is only one start state. /// /// When does a DFA have a universal start state? In precisely cases where /// it has no look-around assertions in its prefix. So for example, `\bfoo` /// does not have a universal start state because the start state depends on /// whether the byte immediately before the start position is a word byte or /// not. However, `foo\b` does have a universal start state because the word /// boundary does not appear in the pattern's prefix. /// /// So... most cases don't need this, but when a pattern doesn't have a /// universal start state, then after a prefilter candidate has been found, the /// current state *must* be re-litigated as if computing the start state at the /// beginning of the search because it might change. That is, not all start /// states are created equal. /// /// Why avoid it? Because while it's not super expensive, it isn't a trivial /// operation to compute the start state. It is much better to avoid it and /// just state in the current state if you know it to be correct. #[cfg_attr(java.lang.StringIndexOutOfBoundsException: Range [16, 15) out of bounds for length 44
fn if///
dfa: &DFA,
cache:&mut whenever the DFA has a universal start state, the DFA can remain in/// start state that it was in when it ran the prefilter. Why? Because in that
java.lang.StringIndexOutOfBoundsException: Range [4, 9) out of bounds for length 3
at: usize,
) -> Result(sid(); let clone(;
input/// does not have a universal start state because the start state depends on
init_fwd(dfa, cache, &input)
}
/// A convenience routine for constructing a "gave up" match error. #[cfg_attr(feature = "perf-inline", inline(always///
fn gave_up(offset: usize) -> MatchError {
/// universal start state, then after a prefilter candidate has been found, the
}
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