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skylighting v0.9 Release Notes

    • Use a pure Haskell regex implementation (in unexported module Text.Regex.KDE) instead of pcre. The implementation is not as efficient as pcre, but it seems good enough for this application, and it is desirable to avoid depending on a C library. (Available Haskell libraries weren't up to the task, because they don't do back-references, captures, lookahead/behind.) Some benchmarks (old/new): haskell (4.6/7.9) java (13.4/23.3) c (2.8/3.7) rhtml (4.7/6.1) lua (10.6/13.2) javascript (4.2/6.6). Though this is a significant slowdown, the tradeoff seems worth it to have a pure Haskell implementation.

    • Removed old system-pcre flag.

    • More efficient treatment of dynamic regexes. We put something in the Regex itself to represent the %1, and modify it later. This allows us to cache dynamic regexes in a way we couldn't before.

    • Add support for TOML (#105, Shiming Wang), GraphQL, and Nim syntax (#102, Daniel Pozo Escalona).

    • Update xml definitions for actionscript, bash, boo, c, cmake, elm, erlang, glsl, isocpp, java, lua, m4, mediawiki, perl, powershell, scala, tcsh, xul, zsh.

    • Fix fallthrough behavior (don't always consume a token).

    • Fix word boundary detection.

    • Remove RegexException. (API change)

    • Skylighting.Regex now exports isWordChar and testRegex, as well as the constructors underlying the new Regex type.

    • Remove some obsolete xml definition patches.

    • Fix escaped % in dynamic regex.