ideas.htm

SP是一个基于GNU C++编译器

<P>
Implement DTDDECL catalog entry.
<P>
Support FILE URLs.
<P>
Perhaps don't want to do searching for catalog files (and perhaps
command line files).
<P>
Provide mechanism for specifying when (if at all) base dir is searched
relative to other dirs.
<P>
Provide extension to catalog format to distinguish entities declared
in non-base DTDs. Perhaps precede entity name by document type name
surrounded by GRPO/GRPC delimiters.
<P>
URLStorageManager should use a DescriptorManager shared with
PosixStorageManager.
<P>
URLStorageManager::resolveRelative should delete "xxx/../" and "./"
components.  Might also be a good idea to resolve host names.
<P>
Implement JIS encoding system (what should be done with half-width yen
and overbar in JIS-Roman? translate to Unicode).
<P>
ExternalInfoImpl::convertOffset: when the position is the character
past the last character and the last character was a newline, line
number should be number of lines + 1.
<P>
Try harder to rewind in StdioStorageObject.

<H2>
Generic
</H2>
<P>
Provide mechanism to access data entities using generated system id.
<P>
Support IMPLICIT/SIMPLE LINK.
<P>
Character set information.
<P>
Need to know space character that separates token.  Alternatively
provide broken down view of tokens.
<P>
Need to know IDREF (and other declared values)?

<H2>
nsgmls
</H2>
<P>
Problem with "\#n;" escape sequence is that it might get used other
than in data.  Probably should get rid of this feature, and give
a warning when there's an unencodable character.

<H2>
Internal
</H2>
<P>
Make sure all files use #pragma i/i.
<P>
Get rid of assumption that Vector&lt;T>::size_type, String&lt;T>::size_type
is size_t.
<P>
Maybe align Owner with auto_ptr.
<P>
Get rid of uses of string as identifier.
<P>
?Maybe support non-const copy constructors for NCVector/Owner.
<P>
Get rid of asEntityOrigin (as far as possible).  Make
InputSourceOrigin::defLocation virtual on origin.  Avoid excessive use
of asInputSourceOrigin.
<P>
Hash should define Hash(String&lt;unsigned char>),
Hash(String&lt;unsigned short>) etc.
<P>
Invert sense of SP_HAVE_BOOL define.
<P>
Get rid of OutputCharStream::open.  Instead have
OutputCharStream::setEncoding.  (Perhaps make a friend so we can use
ostream if we're not interested in encodings.)  Allow use of ostream
instead of OutputCharStream.  Change ParserToolkit::errorStream_'s coding
system when we change the coding system.
<P>
Support 32-bit Char. Need to fix XcharMap and SubstTable.
Detemplatize SubstTable.  Then support UTF-16.
<P>
Have a common version of Ptr for things that have a virtual
destructor.
<P>
Have a common version of Owner for all things that have a virtual
destructor.
<P>
Inheritance in AttributeSemantics unnecesary.
<P>
Rename ISet -> RangeSet.
<P>
ISet and RangeMap should use binary search.
<P>
Better hash function for wide characters.
<P>
OutputCharStream should canonically use RS/RE and translate to system
newline char with raw option that prevents this.
<P>
Avoid having Entity.h depend on ParserState, perhaps by double
dispatching.
<P>
Add uses of explicit keyword.
<P>
When generating message.h file; if we don't have .cxx file and
namespaces are supported, use anonymous namespace.

<H2>
Application framework
</H2>
<P>
Only use static programName for outOfMemory message.
<P>
Need to use AppChar *const * not AppChar ** in CmdLineApp.
<P>
When reporting message with MessageEventHandler need to be able to
update error count.
<P>
Option argument names need to be internationalized.
<P>
Support response files for DOS.
<P>
Sort options in usage message.
<P>
StringMessageArg should be associated with a character set (in
particular, need to distinguish parser character sets from
StorageManager character sets).
<P>
Should translate StringMessageArg from document character set to
system character set.  Have MessageReporter::setDocumentCharacter
function.
<P>
In MessageReporter, maybe distinguish messages coming from the parser.
<P>
Don't ever give a non-existent file as a location in a error message.
<P>
Text of messages should be able to specify that an open quote or close
quote should be inserted at a particular point.
<P>
When outputting a StringMessageArg translate \r to \n.
<P>
Make sure wild cards work in VC++ and MS-DOS.

<H2>
Win32
</H2>
<P>
Remove path and extension from program name in error messages.
<P>
Compilers can typically eliminate unused templates.  Reengineer Vector
to reduce code size with such compilers.
<P>
Store messages in resources; requires numeric tags for messages.
<P>
Should automatically register all available code pages.
<P>
Make use of IsTextUnicode() API.
<P>
Have StorageManager that uses Win32 API directly.  Would avoid limits
on number of open files. Also use flag that says file is being
accessed sequentially.
<P>
Allow DTDs to be compiled into binary by having storage manager that
uses resource ids.

<H2>
Architecture engine
</H2>
<P>
Should give an error with -A if the specified arch does not exist.
<P>
Interpret APPINFO parameter, and automatically enable architectural
processing based on this.
<P>
Handle derived architecture support attributes.
<P>
When doing architectural processing in link type, not possible to have
notation declaration, so need some other way to specify public
identifier for architecture.
<P>
Allow DOCTYPE to be declared inline (as with CONCUR or EXPLICIT LINK).
<P>
Grok conventional comments.
<P>
Make work automatically with EventHandlers that process subdoc.  Make
references to subdocs architectural.
<P>
Support different SGML declaration for meta-DTD.
<P>
Maybe should map internal sdata/cdata entities to copies in meta-DTD.
<P>
Perhaps when getting open element info should indicate that gis are
architectural.
<P>
Think about references to SDATA entities in default values in meta-DTD.
<P>
Add default entity from real DTD to meta-DTD.
<P>
Tokenize ArcForm attribute appropriately.
<P>
Make special case for parsing DTD when entity can't be accessed.
<P>
Try to provide extension that would allow architecture elements be
asynchronous with actual elements?  This would provide CONCUR
functionality.

<H2>
sgmlnorm
</H2>
<P>
Avoid bogus newline from invalid empty document.
<P>
Avoid always escaping >.
<P>
Option to say whether to use character references for 8-bit characters.
<P>
Option to output implied attributes.
<P>
Option to output all non-implied attributes.
<P>
Option to omit attribute name with name tokens.
<P>
Protect against recognition of short references.
<P>
Option to preserve CDATA entity references.
<P>
Option to output general entity declarations in DTD subset
(but what about data attributes)?

<H2>
spam
</H2>
<P>
Option to normalize names.
<P>
Add comments round expanded entities to prevent false delimiter
recognition.
<P>
Add newline at the end if last thing was omitted tag.
<P>
Option to warn about changes in internal entities when not expanding.

<H2>
Documentation
</H2>
<P>
Error message format.
<P>
&lt;catalog&gt; FSI tag.
<P>
<ADDRESS>
James Clark<BR>
[e-mail]
</ADDRESS>
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