Struct EngineOptions 

pub struct EngineOptions {
    pub dfa_threshold: usize,
    pub max_dfa_capacity: usize,
    pub lookahead_context_max: u32,
    pub unicode: UnicodeMode,
    pub case_insensitive: bool,
    pub dot_matches_new_line: bool,
    pub ignore_whitespace: bool,
    pub hardened: bool,
}

Engine configuration, passed to Regex::with_options.

Fields

dfa_threshold: usize

states to eagerly precompile (0 = fully lazy).

max_dfa_capacity: usize

max cached DFA states; clamped to u16::MAX.

lookahead_context_max: u32

max lookahead context distance (default: 800).

unicode: UnicodeMode

Unicode coverage for \w and \d (default: UnicodeMode::Unicode).

case_insensitive: bool

global case-insensitive matching (default: false).

dot_matches_new_line: bool

. matches \n (default: false). _ always matches any byte.

ignore_whitespace: bool

allow whitespace and # comments in the pattern (default: false).

hardened: bool

use O(N·S) hardened forward scan (default: false). prevents quadratic blowup on adversarial pattern+input combinations.

Implementations

impl EngineOptions

pub fn unicode(self, mode: UnicodeMode) -> Self

set Unicode coverage for \w and \d.

pub fn case_insensitive(self, yes: bool) -> Self

set case-insensitive mode.

pub fn dot_matches_new_line(self, yes: bool) -> Self

set dot-matches-newline mode.

pub fn ignore_whitespace(self, yes: bool) -> Self

set ignore-whitespace (verbose) mode.

pub fn hardened(self, yes: bool) -> Self

enable hardened mode for untrusted patterns: uses only O(N·S) forward scan (~5-20x constant overhead).

Trait Implementations

impl Default for EngineOptions

fn default() -> Self

Returns the “default value” for a type.