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This is a Factor port of the jEdit 4.3 syntax highlighting engine (http://www.jedit.org). jEdit 1.2, released in late 1998, was the first release to support syntax highlighting. It featured a small number of hand-coded "token markers" -- simple incremental parers -- all based on the original JavaTokenMarker contributed by Tal Davidson. Around the time of jEdit 1.5 in 1999, Mike Dillon began developing a jEdit plugin named "XMode". This plugin implemented a generic, rule-driven token marker which read mode descriptions from XML files. XMode eventually matured to the point where it could replace the formerly hand-coded token markers. With the release of jEdit 2.4, I merged XMode into the core and eliminated the old hand-coded token markers. XMode suffers from a somewhat archaic design, and was written at a time when Java VMs with JIT compilers were relatively uncommon, object allocation was expensive, and heap space tight. As a result the parser design is less general than it could be. Furthermore, the parser has a few bugs which some mode files have come to depend on: - If a RULES tag does not define any keywords or rules, then its NO_WORD_SEP attribute is ignored. The Factor implementation duplicates this behavior. - if a RULES tag does not have a NO_WORD_SEP attribute, then it inherits the value of the NO_WORD_SEP attribute from the previous RULES tag. The Factor implementation does not duplicate this behavior. If you find a mode file which depends on this flaw, please fix it and submit the changes to the jEdit project. - References to non-existent rule sets in IMPORT tags and DELEGATE attributes were ignored in jEdit. They raise an error in Factor. If you wish to contribute a new or improved mode file, please contact the jEdit project. Updated mode files in jEdit will be periodically imported into the Factor source tree.