reflex v4.1.0

What's new?

• improved lazy quantifiers for POSIX regex lazy matching in linear time (i.e. no backtracking) using an advanced DFA transformation algorithm first introduced in RE/flex in 2016 and extended in this release
• add option --[no]yypanic for Flex++ compatibility

reflex v4.0.1

What's new?

• improved option %o find
• two new examples, including an AWK-like fast search demo in C++, to demonstrate option %o find
• fix #195

reflex v4.0

What's new?

• faster Matcher::find() with a new DFA cut algorithm to optimize match prediction speed and accuracy, see also ugrep 5.0
• apply Unicode pattern canonicalization with reflex::convert(..., reflex::convert_flag::unicode)

reflex v3.5.1

Minor improvements.

reflex v3.5.0

• updated to Unicode 15.1
• update \X to match Unicode characters
• clarify . (dot) in the documentation when used with %unicode-enabled lexers, which is a catch-all pattern e.g. to report lexical errors

reflex v3.4.1

Word boundary anchors (\<, \>, \b and \B) can now be used anywhere in a pattern with the default RE/flex regex engine. Backtracking on word boundary anchors is performed by the regex engine to match input when anchors are embedded in a regex pattern (not at the ends of a pattern) such as bar.*\bfoo.

However, no backtracking is performed by the fast directly-coded DFA engines generated with --fast, which means that word boundary anchors that require backtracking, such as bar.*\bfoo, may not match with --fast. Please note that tokenizers and scanners typically don't use word boundaries in their patterns, but this new feature was added as part of a general RE/flex regex pattern library update and is also supported by its fuzzy matcher variant.

reflex v3.4.0

• fix FuzzyMatcher::DEL flag when this is the only flag selected for fuzzy matching
• fix FuzzyMatcher::matches() bug that in some cases incorrectly matched an extra character before the end of the input
• optimize find() for faster pattern searching
• updated saving the FSM pred[] hashes to a file, which has changed slightly to implement additional optimizations
• increase default buffer size REFLEX_BUFSZ to 128K from 64K for best throughput performance

reflex v3.3.8

Minor update to sync up the code base with the ugrep project.

reflex v3.3.7

Faster find() with additional SIMD acceleration intrinsics.

reflex v3.3.6

Faster find(); improved reflex --stdout option to include FSM tables.