impl: switch to aho-corasick 1.0

This is a transitory commit that will need to be updated once
aho-corasick 1.0 is actually released. Its purpose is to make it so the
regex crate, the "old" regex crate and regex-automata all agree on the
same version of aho-corasick to use while in development.

Cargo.toml

@@ -107,8 +107,9 @@ pattern = []
 
 # For very fast prefix literal matching.
 [dependencies.aho-corasick]
-version = "0.7.18"
+version = "0.7.20"
 optional = true
+git = "https://github.com/BurntSushi/aho-corasick"
 
 # For skipping along search text quickly when a leading byte is known.
 [dependencies.memchr]

src/exec.rs

@@ -4,7 +4,7 @@ use std::panic::AssertUnwindSafe;
 use std::sync::Arc;
 
 #[cfg(feature = "perf-literal")]
-use aho_corasick::{AhoCorasick, AhoCorasickBuilder, MatchKind};
+use aho_corasick::{AhoCorasick, MatchKind};
 use regex_syntax::hir::literal;
 use regex_syntax::hir::{Hir, Look};
 use regex_syntax::ParserBuilder;
@@ -98,7 +98,7 @@ struct ExecReadOnly {
     /// if we were to exhaust the ID space, we probably would have long
     /// surpassed the compilation size limit.
     #[cfg(feature = "perf-literal")]
-    ac: Option<AhoCorasick<u32>>,
+    ac: Option<AhoCorasick>,
     /// match_type encodes as much upfront knowledge about how we're going to
     /// execute a search as possible.
     match_type: MatchType,
@@ -392,7 +392,7 @@ impl ExecBuilder {
     }
 
     #[cfg(feature = "perf-literal")]
-    fn build_aho_corasick(&self, parsed: &Parsed) -> Option<AhoCorasick<u32>> {
+    fn build_aho_corasick(&self, parsed: &Parsed) -> Option<AhoCorasick> {
         if parsed.exprs.len() != 1 {
             return None;
         }
@@ -406,10 +406,9 @@ impl ExecBuilder {
             return None;
         }
         Some(
-            AhoCorasickBuilder::new()
+            AhoCorasick::builder()
                 .match_kind(MatchKind::LeftmostFirst)
-                .auto_configure(&lits)
-                .build_with_size::<u32, _, _>(&lits)
+                .build(&lits)
                 // This should never happen because we'd long exceed the
                 // compilation limit for regexes first.
                 .expect("AC automaton too big"),

src/literal/imp.rs

@@ -1,6 +1,6 @@
 use std::mem;
 
-use aho_corasick::{self, packed, AhoCorasick, AhoCorasickBuilder};
+use aho_corasick::{self, packed, AhoCorasick};
 use memchr::{memchr, memchr2, memchr3, memmem};
 use regex_syntax::hir::literal::{Literal, Seq};
 
@@ -26,7 +26,7 @@ enum Matcher {
     /// A single substring, using vector accelerated routines when available.
     Memmem(Memmem),
     /// An Aho-Corasick automaton.
-    AC { ac: AhoCorasick<u32>, lits: Vec<Literal> },
+    AC { ac: AhoCorasick, lits: Vec<Literal> },
     /// A packed multiple substring searcher, using SIMD.
     ///
     /// Note that Aho-Corasick will actually use this packed searcher
@@ -149,7 +149,7 @@ impl LiteralSearcher {
             Empty => 0,
             Bytes(ref sset) => sset.dense.len(),
             Memmem(_) => 1,
-            AC { ref ac, .. } => ac.pattern_count(),
+            AC { ref ac, .. } => ac.patterns_len(),
             Packed { ref lits, .. } => lits.len(),
         }
     }
@@ -161,8 +161,8 @@ impl LiteralSearcher {
             Empty => 0,
             Bytes(ref sset) => sset.approximate_size(),
             Memmem(ref single) => single.approximate_size(),
-            AC { ref ac, .. } => ac.heap_bytes(),
-            Packed { ref s, .. } => s.heap_bytes(),
+            AC { ref ac, .. } => ac.memory_usage(),
+            Packed { ref s, .. } => s.memory_usage(),
         }
     }
 }
@@ -212,10 +212,10 @@ impl Matcher {
                 return Matcher::Packed { s, lits: lits.to_owned() };
             }
         }
-        let ac = AhoCorasickBuilder::new()
+        let ac = AhoCorasick::builder()
             .match_kind(aho_corasick::MatchKind::LeftmostFirst)
-            .dfa(true)
-            .build_with_size::<u32, _, _>(&pats)
+            .kind(aho_corasick::AhoCorasickKind::DFA)
+            .build(&pats)
             .unwrap();
         Matcher::AC { ac, lits: lits.to_owned() }
     }