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normally, since SciTECO is not a library, this is not strictly
necessary since every library should use proper name prefixes
or namespaces for all global declarations to avoid name clashes.
However
* you cannot always rely on that
* Scintilla does violate the practice of using prefixes or namespaces.
The public APIs are OK, but it does define global functions/methods,
e.g. for "Document" that clashed with SciTECO's "TECODocument" class at
link-time.
Scintilla can put its definitions in a namespace, but this feature
cannot be easily enabled without patching Scintilla.
* a "SciTECO" namespace will be necessary if "SciTECO" is ever to be
turned into a library. Even if this library will have only a C-linkage
API, it must ensure it doesn't clutter the global namespace.
So the old "TECODocument" class was renamed back to "Document"
(SciTECO::Document).
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* specifications resulted in runtime errors (unexpected exception) when bad_alloc ocurred
* specs should be used scarcely: only when the errors that may be thrown are all known
and for documentary purposes
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macros
* if enabled, when a function key is pressed it is looked up in Q-Registers ^F...
e.g. HOME key corresponds to register ^FHOME
* the string if available is inserted as if it was entered by key-presses
(later it may be entered as a single input token which may be removed in a single rubout)
* only NCurses currently, key names directly correspond to Curses key names
* on Curses if function keys are enabled ESCAPE will be inserted after a delay
(because function keys are transmitted via escape sequences).
A function key macro may be used to define an alternative escape character
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* enabled for all modifying Q-Reg commands
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* simplified traditional commandline editing. no need to extend cmdline string one character
at a time when inserting multiple. instead there's a marker (cmdline_pos) specifying the macro
length to execute in a "step" and also the anchor for generating undo tokens
* implementation does not yet work in macro calls
* while editing the commandline, other buffers/registers may not be edited
(need push-down-list and auxiliary q-register)
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* parser.cpp|h should be reserved for generic and misc. stuff.
the StateExpectQReg class is used almost exclusively by qregisters.cpp|h
* resolves a circular header dependency issue
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commandline macro)
* only works as part of commandline macro,
* at the beginning of other macros, it is treated like an arithmetic asterisk
* variables defined in cmdline.cpp are now declared by new cmdline.h
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