1-----------------------------------------------------------------------------
21.20.0
3
4        * Fix #121: the -i flag produces an .info file even if
5          the %expect pragma is violated
6        * Fix #131: qualify uses of Prelude functions in generated code
7        * Fix #161: drop fewer parse items when generating an .info file
8        * Introduce the %shift directive to resolve shift/reduce
9          conflicts explicitly, useful in conjunction with %expect 0
10        * Remove the deprecated build configuration flag 'small_base'
11
12-----------------------------------------------------------------------------
131.19.12
14
15        * Fix for building with GHC 8.8.x
16        * Move custom Setup preprocessing steps into a separate
17          executable, like Alex
18
19-----------------------------------------------------------------------------
201.19.11
21
22        * Fix for building with GHC 8.6.x
23
24-----------------------------------------------------------------------------
251.19.10
26
27        * Fix polymorphic (rank-n) non-terminals
28        * Fix for GHC 8.8.1
29
30-----------------------------------------------------------------------------
31
321.19.9
33
34        * Fix cabal warnings
35        * Bump upper bounds
36        * Fix build with GHC 8.4.1-alpha
37
38-----------------------------------------------------------------------------
391.19.8
40
41        * Fix issue #94 (some grammars don't compile due to new type
42          signatures introduced to allow overloading to be used)
43
44-----------------------------------------------------------------------------
451.19.7
46
47        * Fix missing test suite files in the sdist
48
49-----------------------------------------------------------------------------
501.19.6
51        * Manually generate Parser.hs using Makefile before sdist,
52          to fix bootstrapping problems with cabal sandboxes & new-build
53        * Documentation fixes
54        * Fixed GLR support
55        * new option -p/--pretty prints the grammar rules (only) to a file
56        * Added generation of additional type signatures to enable use
57          of typeclasses in monadic parsers.
58
59-----------------------------------------------------------------------------
601.19.5
61        * fixes for GHC 7.10
62        * Code cleanups (thanks Index Int <vlad.z.4096@gmail.com>)
63
64-----------------------------------------------------------------------------
651.19.4
66        * fix for GHC 7.10 (Applicative/Monad, #19, #21)
67
68-----------------------------------------------------------------------------
691.19.3
70        * fix for GHC 7.2 (#16)
71
72-----------------------------------------------------------------------------
731.19.2
74        * fixes for clang (XCode 5)
75
76-----------------------------------------------------------------------------
771.19.1
78        * repackaged to build with GHC 7.7+
79
80-----------------------------------------------------------------------------
811.19
82        * necessary changes to work with GHC 7.8
83
84-----------------------------------------------------------------------------
851.18.10
86        * Fix build with GHC 7.6
87
88-----------------------------------------------------------------------------
891.18.8
90        * Fix a packaging bug (cabal-install-0.10.2 didn't put the
91          Happy-generated files in the sdist)
92
93-----------------------------------------------------------------------------
941.18.7
95
96        * Fix a bug in error handling when using %monad without %lexer
97
98-----------------------------------------------------------------------------
99Changes from version 1.17 to 1.18
100
101        * New feature: EBNF-style paramterized macros, thanks to
102          Iavor Diatchki.
103        * Works with Cabal 1.2, 1.4 and 1.6
104        * A few minor bugfixes
105
106-----------------------------------------------------------------------------
107Changes from version 1.16 to 1.17
108
109        * Cabal 1.2 is required
110        * Works with upcoming GHC 6.8.1
111        * Fix the 'parE' bug (poor error message for errors in the grammar)
112        * Some performance improvements to Happy itself
113
114-----------------------------------------------------------------------------
115Changes from version 1.15 to 1.16
116
117	* Switch to a Cabal build system: you need a recent version of Cabal
118	  (1.1.6 or later).  If you have GHC 6.4.2, then you need to upgrade
119	  Cabal before building Happy.  GHC 6.6 is fine.
120
121	* New %error directive
122
123	* New production forms: {%% .. } and {%^ .. }
124
125	* Added Attribute Grammar support, by Robert Dockins
126
127-----------------------------------------------------------------------------
128Changes from version 1.14 to 1.15
129
130	* New %expect directive
131	* the list of tokens passed to happyError now includes the current
132          token (not %lexer).
133	* added support for ambiguous grammars via Generalized LR parsing
134	* added %partial to indicate a parser that can return a result
135	  before EOF is reached.
136
137-----------------------------------------------------------------------------
138Changes from version 1.13 to 1.14
139
140	* New meta-variable $> represents the rightmost token.
141
142	* Happy's OPTIONS pragma is merged with an existing one in
143	  the grammar file, if any.
144
145-----------------------------------------------------------------------------
146Changes from version 1.11 to 1.13
147
148	* Support for newer versions of GHC (>= 5.04).
149
150	* Addition of an experimental flag: --strict.
151
152-----------------------------------------------------------------------------
153Changes from version 1.10 to 1.11
154
155	* tokens no longer have a default precedence - if you
156	  want a token to have a precedence, you have to declare it.
157
158	* bugfix to templates for GHC on 64-bit platforms.
159
160-----------------------------------------------------------------------------
161Changes from version 1.9 to 1.10
162
163	* bugfixes, and minor performance improvements,
164
165	* most of the examples work again.
166
167-----------------------------------------------------------------------------
168Changes from version 1.8 to 1.9
169
170	* A grammar may now contain several entry points, allowing
171	  several parsers to share parts of the grammar.
172
173	* Some bugfixes.
174
175-----------------------------------------------------------------------------
176Changes from version 1.6 to 1.8
177
178      * Parser table compression, and more efficient
179        table encoding when used with GHC.  Large grammars
180        can now be compiled in much less time/space than
181        before using GHC.
182
183      * Yacc-style operator precedence, thanks to patches
184        from Hermann Oliveira Rodrigues <hermann@dcc.ufmg.br>
185        and Josef Svenningsson <josefs@cs.chalmers.se>.
186
187      * A debug option which causes the generated parser to
188        print tracing information at each step during parsing.
189
190-----------------------------------------------------------------------------
191Changes from version 1.5 to 1.6
192
193* Now written in, and generates, Haskell 98.
194
195* Several bug fixes.
196
197* A new option, -c, generates parsers that use GHC's unsafeCoerce#
198  primitive to speed up parsing and cut down the binary size.
199  The -c option can only be used with the -g (GHC extensions) option.
200
201* Parsers generated with the -g option will compile to smaller binaries
202  now - some sources of parser-bloat were identified and squished.
203
204* Happy has a new Open Source license, based on the BSD license.
205
206* A sample Haskell parser using Happy is included.
207
208-----------------------------------------------------------------------------
209Changes from version 1.2 to version 1.5
210
211* Many bug fixes to the error recovery support, found by experimenting
212  with the Haskell grammar and layout.
213
214* Happy is about 5 times faster on large examples, due to some
215  changes in the LALR(1) algorithms.
216
217-----------------------------------------------------------------------------
218Changes from version 0.9a to version 1.2
219
220* Supports Haskell 1.4
221
222* Lots of bugs fixed
223
224* Performance: the parser generator is at least 20% faster, and
225  generated parsers should be faster due to the replacement of a
226  data type with a newtype.
227
228* Simple error recovery: designed to be enough to implement the
229  Haskell layout rule.
230
231* Revamped monad support: the monad can now be threaded through
232  the lexer, enabling passing of state between the parser and the
233  lexer (handy for the Haskell layout rule), and consistent error
234  handling.
235
236* The %newline feature is removed, the same effect can be achieved
237  using the new monad support.
238
239-----------------------------------------------------------------------------
240Changes from version 0.8 to 0.9:
241
242* Happy should be much faster than before.
243
244* Generated parsers will be 5-10% smaller.
245
246* Happy now compiles with ghc-0.26.
247
248* Support for monadic parsers via %monad (see the documentation).
249
250* New syntax: previously
251
252	f :: { <type> }
253	f : ...
254	  | ...
255	  etc.
256
257  can now be written
258
259	f :: { <type> }
260	  : ...
261	  | ...
262	  etc.
263
264  (i.e. omit the extra 'f'.  It was always ignored anyway :-)
265
266* Miscellaneous bug fixes.
267