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implementation classes
* whenever the implementation class was not exactly RBEntryType,
it had to have a virtual destructor since RBTree cared about
cleanup and had to delete its members.
* Since it does not allocate them, it is consistent to remove RBTree::clear().
The destructor now only checks that subclasses have cleaned up.
Implementing cleanup in the subclasses is trivial.
* Consequently, RBEntryString no longer has to be virtual.
HelpIndex and GotoTables are completely non-virtual now
which saves memory (and a bit of cleanup speed).
For QRegister, not much changes, though.
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* the old implementation tried to avoid template programming by
making the entry comparison function virtual.
* The new RBTree implementation takes a template argument with the
implementation of RBEntry. It is now partially conventional
that the template argument must be actually derived from RBTree::RBEntry
and must define a "compare" method.
* As an advantage we now get static polymorphism (avoiding virtual
calls and allowing for more compiler optimizations) and the
the RBEntry implementation no longer has to be virtual.
* The only RB-Trees actually used are string-keyed, though.
Therefore there's a common base class RBTreeString now which
defines two synonymous "key" and "name" attributes.
* The entry base class RBEntryString is virtual again because
we do not want to propagate the RBEntryType template parameter
even further and the RBTree base class needs to destroy
entries.
This might be avoided by not defining a RBTree::clear() method,
leaving this task to the implementations.
At least QRegisters have to be virtual, though.
* RBTreeString only depends on the strcmp() and strncmp() functions
used now and only case-sensitive and case-insensitive versions
are actually required, so we instantiate these templates statically
in rbtree.cpp.
This means there are still only two instantiations of the RBTree
in the binary.
* RBTreeString defines convenient wrappers for find() and nfind()
to look up by string.
This uses the RBEntryString base class, so no allocations whatsover
are required for lookups and less space is wasted on the call stack.
* A RBEntryOwnString base class is also provided which frees the
implementations from memory managing the tree keys.
* RBTreeString can now be used to add other common functionality
like auto-completions for Q-Registers, goto labels and help topics.
* some minor optimizations
* updated TODO
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called tedoc.tes
* some code simplifications
* it now supports command line arguments via getopt.tes.
* the -C flag enabled C/C++ mode.
By default tedoc parses SciTECO code which means it can be used
to document macro packages as well.
* Therefore it is installed as a separate tool now.
It may be used as a Groff preprocessor for third-party macro
authors to generate (wo)man pages.
* there's a man page tedoc.tes(1)
* The troff placeholder macro is now called ".TEDOC".
* Help topics can now be specified after the starting comment /*$ or !*$.
Topics have been defined for all built-in commands.
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* the new "?" (help) command can be used to look up
help topics.
* help topics are index from $SCITECOPATH/women/*.woman.tec
files.
* looking up a help topic opens the corresponding "womanpage"
and jumps to the position of the topic (it acts like an anchor
into the document).
* styling is performed by *.woman.tec files.
* Setting up the Scintilla view and munging the *.tec file
is performed by the new "woman.tes" lexer.
On supporting UIs (Gtk), womanpages are shown in a variable-width
font.
* Woman pages are usually not hand-written, but generated from manpages.
A special Groff post-processor grosciteco has been introduced for this
purpose. It is much like grotty, but can output SciTECO macros for styling
the document (ie. the *.woman.tec files).
It is documented in its own man-page.
* grosciteco also introduces sciteco.tmac - special Troff macros
for controlling the formatting of the document in SciTECO.
It also defines .SCITECO_TOPIC which can be used to mark up
help topics/terms in Troff markup.
* Woman pages are generated/formatted by grosciteco at compile-time, so
they will work on platforms without Groff (ie. as on windows).
* Groff has been added as a hard compile-time requirement.
* The sciteco(1) and sciteco(7) man pages have been augmented with
help topic anchors.
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