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generic/nsfPointer.c: - add reference counter to avoid double-inits and double-frees in case the table of converters is used from multiple interpreters

- change base stub table from XOTcl to NSF. - improve wording of error messages.

- add parameter parser and converter to stub tables

- make converter usable from c-based packages compiled with subs activated

- nsf: added switch "-checkalways" to nsf::method::create - nx: added switch "checkalways" to "method" and "object method" - extended regression test

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- minor cleanup: * reduce variable scope * remove uncalled static function

-added flag -checkalways to nsf::proc and nsf::asm::proc (for the latter just a placeholder for now). If the flag is used, it will cause argument testing independently from the "configure checkarguments" setting. To force argument checking always is useful e.g. for checking external values (e.g. in a web server)

Realized enter traces for method procs; leave traces remain TBD

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Explored assertion support from an NX perspective, by reviewing the current implementation against Eiffel's RAC; along the way, I made ::nsf::current more robust when being used in assertions

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- don't call postcondition, when the command/invariant have returned already an error

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nsf.c - fixed a bug where turning on assertions could swallow result-codes - extended regression test

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- fix potential crash when preconditions are empty

nsf.c: - dont't use the default of a invocation parameter in "configure" when the object is already initialized. The default is in general only used when the parameter is not specified. We do not want e.g. superclass to be reset to ::nx::Object, when configure is called on a class without arguments. - extended regression test

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- remove debug statement

code cleanup

- make sure that packages from XOTcl 1 require XOTcl 1

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Fix the implementation of NsfInterpObjCmd() which crashed previously due to the broken resolution of the child interpreter

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- NsfDStringPrintf(): set the length of the resulting DString

Using the ANSI-compliant I/O operations such as vsnprintf() under MinGW and MinGW-w64 tool chains

- code cleanup

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- minor code cleanup

nsf.c: - fix a bug in SlotContainerCmdResolver() when NSF_MEM_COUNT is activated - fix a small memory leak for PER_OBJECT_PARAMETER_CACHING - all cases detectable with --enable-memcount=yes are fixed

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- fix label for debugging reference counts

- reduce variable scopes

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- Eliminate all use of Tcl_GetStringFromObj() function.

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- further release work

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nsf.c - removed obsolete function AssertionAppendPrePost() - removed obsolete function NsfNSCopyCmdsCmd() and ::nsf::nscopycmd (handled now more general on scripting level in the "copy" method)

nx.tcl:

- "copy" method: fixed copying of class-level per-object methods

- extended regression tests

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nsf.c - fixed a potental crash for objects having a wrapperless alias defined

Merge with remote branch

Make sure that the original error message is preserved when calling destroy after a failed CMD or INITCMD

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