commit 54a60fe6f41ca70f02769c1fcd30f450b6657ad4
author Andy Heninger <andy.heninger@gmail.com> Thu Oct 24 14:50:25 2019 -0700
committer Andy Heninger <andy.heninger@gmail.com> Thu Jan 30 15:13:07 2020 -0800
tree 3b96b0505aedd3b738bd95bbac59246c1e91d7da
parent b9bb61259f20482e7c6ce23eb2636c663d89042e

ICU-11548 Improve regex static UnicodeSets handling

Compiled regular expression patterns make use of several shared common
UnicodeSets. This change simplifies the creation and use of these
static UnicodeSets.

- Pointer fields to the static sets are removed from the compiled patterns,
  and the static variables are accessed directly. The deleted pointers
  were a hold-over from earlier code that did not use shared statics.

- The UnicodeSet pattern literals are changed from hex constants to
  u"string literals".

- The size of fRuleSets (from regexst.h) is changed from a hard-coded 10
  to the number of UnicodeSets actually required. Doing this required
  a change to regexcst.pl to export the required size. Changing and
  rerunning this perl code resulted in massive but benign changes to
  the generated file regexcst.h, the result of perl having changed its
  order of enumeration of hashes since the file was last regenerated.

- UnicodeSets are frozen when possible. Should result in faster matching.