Struct daachorse::charwise::CharwiseDoubleArrayAhoCorasickBuilder

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pub struct CharwiseDoubleArrayAhoCorasickBuilder { /* private fields */ }

Expand description

Builder for CharwiseDoubleArrayAhoCorasick.

Implementations

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impl CharwiseDoubleArrayAhoCorasickBuilder

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pub fn new() -> Self

Creates a new CharwiseDoubleArrayAhoCorasickBuilder.

Examples

use daachorse::CharwiseDoubleArrayAhoCorasickBuilder;

let patterns = vec!["全世界", "世界", "に"];

let builder = CharwiseDoubleArrayAhoCorasickBuilder::new();
let pma = builder.build(patterns).unwrap();

let mut it = pma.find_iter("全世界中に");

let m = it.next().unwrap();
assert_eq!((0, 9, 0), (m.start(), m.end(), m.value()));

let m = it.next().unwrap();
assert_eq!((12, 15, 2), (m.start(), m.end(), m.value()));

assert_eq!(None, it.next());

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pub const fn match_kind(self, kind: MatchKind) -> Self

Specifies MatchKind to build.

Arguments

kind - Match kind.

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pub const fn num_free_blocks(self, n: u32) -> Self

Specifies the number of last blocks to search bases.

The smaller the number is, the faster the construction time will be; however, the memory efficiency can be degraded.

Arguments

n - The number of last blocks.

Panics

n must be greater than or equal to 1.

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pub fn build<I, P, V>(
 self,
 patterns: I
) -> Result<CharwiseDoubleArrayAhoCorasick<V>> where
 I: IntoIterator<Item = P>,
 P: AsRef<str>,
 V: Copy + TryFrom<usize>,

Builds and returns a new CharwiseDoubleArrayAhoCorasick from input patterns. The value i is automatically associated with patterns[i].

Arguments

patterns - List of patterns.

Errors

DaachorseError is returned when

patterns is empty,
patterns contains entries of length zero,
patterns contains duplicate entries,
the conversion from the index i to the specified type V fails,
the scale of patterns exceeds the expected one, or
the scale of the resulting automaton exceeds the expected one.

Examples

use daachorse::CharwiseDoubleArrayAhoCorasickBuilder;

let patterns = vec!["全世界", "世界", "に"];
let pma = CharwiseDoubleArrayAhoCorasickBuilder::new()
    .build(patterns)
    .unwrap();

let mut it = pma.find_iter("全世界中に");

let m = it.next().unwrap();
assert_eq!((0, 9, 0), (m.start(), m.end(), m.value()));

let m = it.next().unwrap();
assert_eq!((12, 15, 2), (m.start(), m.end(), m.value()));

assert_eq!(None, it.next());

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pub fn build_with_values<I, P, V>(
 self,
 patvals: I
) -> Result<CharwiseDoubleArrayAhoCorasick<V>> where
 I: IntoIterator<Item = (P, V)>,
 P: AsRef<str>,
 V: Copy,

Builds and returns a new CharwiseDoubleArrayAhoCorasick from input pattern-value pairs.

Arguments

patvals - List of pattern-value pairs.

Errors

DaachorseError is returned when

patvals is empty,
patvals contains patterns of length zero,
patvals contains duplicate patterns,
the scale of patvals exceeds the expected one, or
the scale of the resulting automaton exceeds the expected one.

Examples

use daachorse::CharwiseDoubleArrayAhoCorasickBuilder;

let patvals = vec![("全世界", 0), ("世界", 10), ("に", 100)];
let pma = CharwiseDoubleArrayAhoCorasickBuilder::new()
    .build_with_values(patvals)
    .unwrap();

let mut it = pma.find_iter("全世界中に");

let m = it.next().unwrap();
assert_eq!((0, 9, 0), (m.start(), m.end(), m.value()));

let m = it.next().unwrap();
assert_eq!((12, 15, 100), (m.start(), m.end(), m.value()));

assert_eq!(None, it.next());