=== 4.16.0 / 2021-10-27

* 4 minor enhancements:

  * Added Sexp#value (pushed up from ruby_parser).
  * Aliased Sexp#concat to #_concat and use that so it can be overridden.
  * Cache the #hash result.
  * StrictSexp mode (4) now covers concat.

* 3 bug fixes:

  * Fix some doco on each_sexp to clarify that it is not recursive.
  * Fixed a bug calling enum_for when using each_of_type w/ no block.
  * Minor fixes to pt_testcase.rb for custom timeouts and better error handling.

=== 4.15.3 / 2021-05-15

* 1 minor enhancement:

  * Added 3.0 to pt_testcase.rb

=== 4.15.2 / 2021-01-10

* 1 bug fix:

  * Bumped ruby version to include < 4 (trunk).

=== 4.15.1 / 2020-08-31

* 1 bug fix:

  * Bumped ruby version to include 3.0 (trunk).

=== 4.15.0 / 2020-06-09

* 1 minor enhancement:

  * Added `child` and `include` to Sexp::Matcher.parse language.

=== 4.14.1 / 2020-02-09

* 2 bug fixes:

  * Declared support for ruby 2.2+ to gemspec.
  * Fixed alias for `not?` to `-` for ruby <= 2.4. (nard-tech).

=== 4.14.0 / 2020-02-06

* 4 minor enhancements:

  * Added '-' as an alias for the 'not?' pattern matching command.
  * Added Klass matcher to match on types.
  * Added `k` shortcut for Klass & hooked into Sexp::Matcher.parse.
  * Added any matcher to pattern parser.

=== 4.13.0 / 2019-09-24

* 4 minor enhancements:

  * Added Sexp.q (query) and deprecated Sexp.s to distinguish better and match inspect output.
  * Extended Sexp::Matcher::Parser to allow `not?` patterns.
  * Extended Sexp::Matcher::Parser to cover more method names.
  * Split out all pattern-oriented code to sexp_matcher.rb.

* 1 bug fix:

  * Fixed bug w/ ruby's Array#eql? and #hash not looking at ivars.

=== 4.12.1 / 2019-06-03

* 1 minor enhancement:

  * Sexp#line now raises if setting w/ non-integer (eg nil).

* 3 bug fixes:

  * Fixed pt_testcase.rb for block args w/ trailing commas.
  * Fixed pt_testcase.rb for stabby proc sexps.
  * Simple fixes for STRICT_SEXP=1.

=== 4.12.0 / 2019-03-12

* 3 bug fixes:

  * Fixed sexp_body to return empty sexp instead of nil when using STRICT_SEXP.
  * STRICT_SEXP=4+ fails w/ current use of concat. Removed concat from strictness for now.
  * Use concat internally instead of splat. Some people have 20000 node sexps! (presidentbeef)

=== 4.11.0 / 2018-04-05

* 1 minor enhancement:

  * Extended deep_each to skip subtrees if block returns :skip.

=== 4.10.1 / 2018-02-15

* 1 minor enhancement:

  * Tweaked pt_testcase for ruby 2.5 and better ruby2ruby test data.

=== 4.10.0 / 2017-07-17

* 2 major enhancements:

  * Added experimental pattern matcher to Sexp. Forked from sexp_path.
  * Extended s to take a block and return a matcher: eg s{ s(:defn, atom, _, ___) }

* 23 minor enhancements:

  * Added $STRICT_SEXP to crank down Sexp.[] and friends.
  * Added Matcher#/ w/ real functionality.
  * Added Sexp#/ to search with new patterns.
  * Added Sexp#map to ensure you get a Sexp back.
  * Added Sexp#new to create a new sexp with the same file/line/comment info.
  * Added Sexp#search_each to recursively search w/ new patterns. Returns enum if no block.
  * Added Sexp#sexp_body=
  * Added Sexp::Matcher.match_subs? and .match_subs= to extend =~ so you can match strictly.
  * Added Sexp::Matcher.parse to convert lispy string to safe matcher: "(defn atom _ ___)"
  * Added all mutation methods to STRICT_SEXP >= 4
  * Added deprecation message to Sexp#structure for [s(...)] forms.
  * Added strict_sexp.rb to help you clamp down for future changes. STRICT_SEXP=1+
  * Auto-require strict_sexp if $STRICT_SEXP is > 0.
  * Converted a lot of indexed access to sexp_type/sexp_body, etc.
  * Finally enforced SexpProcessor#process to only process sexps, not bare arrays.
  * Made Sexp#/ double-dispatch to Matcher#/.
  * Made Sexp#gsub work with new patterns.
  * Made Sexp#sub work with new patterns.
  * Made SexpProcessor STRICT_SEXP=4 compliant.
  * Retired SexpMatchSpecial & SexpAny. Never used by anything AFAICT.
  * Sexp#=== goes back to default.
  * Sexp#=~(pat) calls pat =~ self.
  * Sexp#sexp_body now takes optional offset. Use instead of sexp[n..-1].

* 9 bug fixes:

  * Extended Sexp::Matcher::Parser.parse to lex more forms of regexp.
  * Finished off all missing doco.
  * Fixed == methods on all Matcher classes to include ivars.
  * Fixed Child#satisfy? to properly return false if failed.
  * Fixed Sexp#sexp_body to return a sexp using Sexp#new.
  * Fixed map to use Sexp#new.
  * Only try to set c_type if it responds to it. Make STRICT_SEXP safe.
  * R2C has a hack in SexpProcessor to call sexp_type=. Renamed to c_type= in R2C.
  * Removed very obsolete attrset test from pt_testcase.rb

=== 4.10.0b1 / 2017-06-13

Beta of the above.

=== 4.9.0 / 2017-04-13

* 9 minor enhancements:

  * Added Sexp.depth
  * Added Sexp.sexp_type=
  * Cache Sexp.line_max. Massively speeds up large flay runs.
  * Cleaned up SexpProcessor.process handling of result node type.
  * Extend pt_testcase for ruby 2.4 tests.
  * Extended Sexp.method_missing to only print on every invocation if $VERBOSE=1
  * Extended Sexp.method_missing to warn if the expected sub-sexp is not found.
  * Rewrote Sexp.mass to be MUCH faster. Helps tremendously with flay on large files.
  * Warn that Sexp#method_missing was tripped if $DEBUG.

=== 4.8.0 / 2017-02-01

* 2 minor enhancements:

  * Added Sexp#line_max
  * Extended MethodBasedSexpProcessor#in_method to take line_max and record span.

=== 4.7.0 / 2016-02-18

* 2 minor enhancements:

  * Expand to support 2.3 in tests. (presidentbeef)
  * Return enumerable for deep_each, each_sexp, and each_of_type. (ridiculous)

=== 4.6.1 / 2016-01-21

* 1 bug fix:

  * defs should have a nil node if body is empty.

=== 4.6.0 / 2015-05-28

* 2 minor enhancements:

  * Extended generate_test to deal with 19 and up.
  * Extended pt_testcase.rb so add_19tests means 19 and up.

* 1 bug fix:

  * Added and normalized tests to deal with canonicalized block args from ruby_parser.

=== 4.5.1 / 2015-04-27

* 1 minor enhancement:

  * Cache processors and rewriters. Significant speedup. (presidentbeef)

=== 4.5.0 / 2015-03-09

* 1 minor enhancement:

  * Added SexpProcessor::expand_dirs_to_files as a utility to cmdline tools.

=== 4.4.5 / 2015-01-16

* 1 bug fix:

  * Removed shebangs in tests because of bugs (aka 'features') in RPM packaging tools.

=== 4.4.4 / 2014-08-14

* 1 bug fix:

  * MethodBasedSexpProcessor#in_klass clears out the method_stack for the duration of the block.

=== 4.4.3 / 2014-03-24

* 1 bug fix:

  * Fixed a bunch of pt_testcase entries for 1.9/2.0 wrt ruby2ruby.

=== 4.4.2 / 2014-03-14

* 2 minor enhancements:

  * Changed skipped versioned tests to return, not skip. Reduces noise so you can focus on real skips.
  * Extended versioned tests to include 2.0 and 2.1.

=== 4.4.1 / 2013-12-13

* 1 bug fix:

  * Added parenthesis to fix the structure_remove_begin_1 testcase. (bocete)

=== 4.4.0 / 2013-10-18

* 1 minor enhancement:

  * Added MethodBasedSexpProcessor, extracted from Flog.

=== 4.3.0 / 2013-08-19

* 1 minor enhancement:

  * Switched ParseTreeTestCase to minitest 5.

=== 4.2.1 / 2013-04-09

* 1 bug fix:

  * Removed structure_unused_literal_wwtt because I just don't care anymore

=== 4.2.0 / 2013-03-18

* 2 minor enhancements:

  * Added SexpInterpreter since it is such a common pattern
  * Added aliases Sexp#head & Sexp#rest for readability

=== 4.1.5 / 2013-02-14

* 2 bug fixes:

  * Clarified role of s method. Fixes #12.
  * maglev: Workaround for bug in Array#shift

=== 4.1.4 / 2013-01-22

* 1 minor enhancement:

  * Gave Sexp#structure a ~10% boost

* 2 bug fixes:

  * Fixed Sexp#mass lying when using auto_shifted sexps.
  * Stupid fix for ruby 2.0 method_missing 'bug'.

=== 4.1.3 / 2012-12-06

* 2 bug fixes:

  * Code cleanup... what was I thinking???
  * Explicitly setting pt_testcase.rb to US-ASCII to avoid encoding hell

=== 4.1.2 / 2012-11-03

* 1 bug fix:

  * Sexp#structure should grep for Sexps, not Arrays

=== 4.1.1 / 2012-11-02

* 1 minor enhancement:

  * iter args revamp for ruby_parser 3 changes.

=== 4.1.0 / 2012-10-22

* 1 minor enhancement:

  * Added Environment#current so you can explicitly shadow variables. (meh)

=== 4.0.1 / 2012-07-03

* 4 minor enhancements:

  * 1.9: Had to version split all my 'not' tests since 1.9 is insane.
  * 1.9: f (args) is not allowed in 1.9.
  * 1.9: f(hash, *splat) is not allowed in 1.9.
  * Added module2 test to verify module w/ 2+ entities

* 2 bug fixes:

  * 1.9: Changed !@ to ! since that is what you implement
  * True to my wtf comment, there was a bug in my case_splat test

=== 4.0.0 / 2012-06-07

* 5 major enhancements:

  * Removed :arglist from everything except :op_asgn1.
  * Removed block from resbody
  * Removed block from when node
  * Removed block nodes inside of scope nodes (defn/defs/class/sclass).
  * Removed scope nodes in defn/defs/class/sclass nodes.

* 1 minor enhancement:

  * Added Sexp#deep_each and Sexp#each_sexp. Refactored from Flay

=== 3.2.0 / 2012-04-15

* 5 minor enhancements:

  * Added a ton of block arg tests.
  * Added add19_edgecases to help refactor a bunch of tests that all have the same output.
  * Added better debugging output for rewrites.
  * Cleaned and added a bunch of stabby proc tests.
  * Moved RawParseTree test data to ParseTree project.

* 2 bug fixes:

  * Fixed a bunch of entries for r2r changes against edgecase parse/lex tests
  * Fixes for R2R

=== 3.1.0 / 2012-02-29

* 4 minor enhancements:

  * Added test_call_arglist_trailing_comma__19 (presidentbeef)
  * Added test_fcall_inside_parens. (presidentbeef)
  * Added test_if_args_no_space_symbol__18. (presidentbeef)
  * Added tests for new hash syntax and ternaries in 1.9 (lastobelus)

=== 3.0.10 / 2012-01-04

* 1 minor enhancement:

  * Added test for bare hash at end of array in 1.9. (presidentbeef)

* 1 bug fix:

  * Fixed 1.9.3 warnings

=== 3.0.9 / 2011-12-07

* 1 minor enhancement:

  * Add missing test for a ternary with nil without a space before the colon (brynary)

=== 3.0.8 / 2011-11-16

* 4 minor enhancements:

  * Add 6 missing ruby 1.9 tests (brynary)
  * Added new 1.9 hash tests to pt_testcase.rb
  * Version specific tests are now skipped at runtime, not test creation time
  * Added new block arg tests.

=== 3.0.7 / 2011-09-21

* 2 bug fixes:

  * Fixed and test to not have mandatory parens
  * Fixed r2r's handling of dregexp options

=== 3.0.6 / 2011-08-16

* 5 minor enhancements:

  * Added ParseTreeTestCase#add_19tests
  * Added a bunch of FAILING 1.9 tests stolen from presidentbeef's repo! yay!
  * Added add_19tests and add_18tests to segregate version specific parsing.
  * Moved pt_testcase.rb to sexp_processor
  * Segregated a bunch of 1.8 specific tests using add_18tests.

=== 3.0.5 / 2010-09-01

* 2 minor enhancements:

  * Added in_context to clean up code.
  * optimize inspect to avoid needlessly caching @line

=== 3.0.4 / 2010-03-27

* 1 minor enhancement:

  * Added line number to pretty_print output if $VERBOSE

=== 3.0.3 / 2009-08-14

* 1 minor enhancement:

  * Pulled #mass up from flog/flay

=== 3.0.2 / 2009-06-23

* 2 minor enhancements:

  * Pulled unique.rb from ParseTree to sexp_processor.
  * Switched to minitest.

=== 3.0.1 / 2009-01-20

* 3 minor enhancements:

  * Filled out README
  * Promoted file/line/comments from ruby_parser.
  * Added sexp_type to compliment sexp_body.

=== 3.0.0 / 2008-10-22

* 2 major enhancements:

  * Released as its own project, splitting from ParseTree
  * Added Environment to SexpProcessor and built it in. YAY!

* 6 minor enhancements:

  * Allowed CompositeSexpProcessor to be more ducktypey.
  * Refactored Sexp#method_missing into find_node and find_nodes.
  * Removed Sexp#for and other PT specific code.
  * SexpProcessor#process now runs rewriters before everything else.
  * SexpProcessor#rewrite context only for subs, EMPTY for top level rewrites.
  * SexpProcessor#rewrite will stop iterating if the result isn't another Sexp.