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CHANGELOG
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Version 1.2
-----------
* Re-arranged the source files into hierarchical libraries.
* Exposed the library interface as an installable Cabal package, with
Haddock documentation.
* Added the --unlit option, for removing literate-style comments.
Version 1.1
-----------
* Fix the .cabal way of building cpphs.
* Update the --version reported (forgotten in 1.0, which still reports 0.9)
* No longer throws an error when given an empty file as input.
Version 1.0
-----------
* Add a compatibility script cpphs.compat, allowing cpphs to act as
a drop-in replacement for cpp, e.g.
ghc -cpp -pgmP cpphs.compat
* Place quotes around replacements for special macros __FILE__, __DATE__,
and __TIME__.
* If no files are specified, read from stdin.
* Ignore #! lines (e.g. in scripts)
* Parse -D commandline options once only, and consistently with cpp,
i.e. -Dfoo means foo=1
* Fix compatibility with preprocessors like hsc2hs, which use
non-cpp directives like #def. They are now passed through to the
output with a warning to stderr.
Version 0.9
-----------
* Bugfix for ghc-6.4 -O: flush the output buffer.
Version 0.8
-----------
* Added the --text option, to signify the input should not
be lexed as Haskell. This causes macros to be defined or expanded
regardless of their location within comments, string delimiters, etc.
* Shuffle a few files around to make it easier to say 'hmake cpphs'.
There is also now a runhugs script to invoke cpphs nicely.
Version 0.7
-----------
* Enable the __FILE__, __LINE__, __DATE__, and __TIME__ specials, which
can be useful for creating DIY error messages.
Version 0.6
-----------
* Recognise and ignore the #pragma cpp directive.
* Fix beginning-of-file bug, where in --noline mode, a # cpp directive
at the top of the file appeared in the output.
* Fix chained parenthesised boolean exprs in #if, e.g.
#if ( foo ) && ( bar )
* Fix precedence in chained unparenthesised boolean exprs in #if, e.g.
#if foo && bar || baz && frob
* For better compatibility with cpp, and because otherwise
there are certain constructs that cannot be expressed, we no
longer permit whitespace in a <tt>#define</tt> between the
symbolname and an opening parenthesis, e.g.
#define f (f' id)
Previously, this was interpreted as a parametrised macro,
with arguments in the parens, and no expansion. Now, the space
indicates that this is a textual replacement, and the parenthesised
expression is in fact the replacement.
Version 0.5
-----------
* Added a --version flag to report the version number.
* Renamed --stringise to --hashes, and use it to turn on ## catenation
as well.
* Bugfix for #if 1, previously taken as false.
* Bugfix for --nolines: it no longer adds extra spurious newlines.
* File inclusion now looks in the directory of the calling file.
* Failure to find an include file is now merely a warning to stderr
rather than an error.
* Added a --layout flag. Previously, line continuations in a macro
definition were always preserved in the output, permitting use
of the Haskell layout rule even inside a macro. The default is now
to remove line continuations for conformance with cpp, but the option
of using --layout is still possible.
Version 0.4
-----------
* New flag -Ofile to redirect output
* Bugfix for precedence in #if !False && False
* Bugfix for whitespace between # and if
* Bugfix for #define F "blah"; #include F
Version 0.3
-----------
* Bugfix for recursive macro expansion.
* New flag --strip to remove C comments even outside cpp directives.
* New flag --stringise to recognise the # stringise operator in macros.
Version 0.2
-----------
* New flag --noline to eliminate #line directives from output.
* Add symbol-replacement and macro-expansion.
* New flag --nomacro to turn off symbol/macro-expansion.
2004-Apr-21
-----------
* Now accept multi-line # commands via the \ line continuation operator.
The original file line numbering is preserved in the output by
some tricky acrobatics.
Version 0.1
-----------
* Initial release.