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This patch improves the constantp function dramatically. It
now performs a full expansion of its argument, and recognizes
all of the constant foldable functions that the compiler
recognizes.
* eval.c (const_foldable_s): New symbol variable.
(const_foldable_hash): New static variable.
(constantp_noex): Look up function in the hash table of const
foldable functions, including in the case when it appears in a
dwim form as in [+ 2 2] which is (dwim + 2 2). In this case,
recursively check the arguments for constantp_noex.
We get the hash table of foldable functions from the
sys:%const-foldable% variable, which comes from an autoloaded
module.
(constantp): Fully expand the input form, not just m
macroexpand.
(eval_init): Register the const_foldable_s variable.
* lisplib.c (constfun_instantiate, constfun_set_entries): New
static functions.
(lisplib_init): Register auto-loading of constfun module
via new static functions.
* stdlib/compiler.tl; Load the constfun module if
%const-foldable% is not defined.
(%const-foldable-funs%, %const-foldable%): Removed from here.
* stdlib/constfun.tl: New file.
(%const-foldable-funs%, %const-foldable%): Moved here.
* txr.1: Documented changes to constantp.
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This affects run-time also. Txr installations where the
executable is not in directory ending in ${bindir}
will look for stdlib rather than share/txr/stdlib,
relative to the determined installation directory.
* txr.c (sysroot_init): If we detect relative to the short
name, or fall back on the program directory, use stdlib
rather than share/txr/stdlib as the stdlib_path.
* INSTALL: Update some installation notes not to refer to
share/txr/stdlib but stdlib.
* Makefile (STDLIB_SRCS): Refer to stdlib, not
share/txr/stdlib.
(clean): In unconfigured mode, remove the old share/txr/stdlib
entirely. Remove .tlo files from stdlib.
(install): Install lib materials from stdlib.
* txr.1: Updated documentation under Deployment Directory Structure.
* share/txr/stdlib/{asm,awk,build,cadr}.tl:
Renamed to stdlib/{asm,awk,build,cadr}.tl.
* share/txr/stdlib/{compiler,conv,copy-file,debugger}.tl:
Renamed to stdlib/{compiler,conv,copy-file,debugger}.tl.
* share/txr/stdlib/{defset,doc-lookup,doc-syms,doloop}.tl:
Renamed to stdlib/{defset,doc-lookup,doc-syms,doloop}.tl.
* share/txr/stdlib/{each-prod,error,except,ffi}.tl:
Renamed to stdlib/{each-prod,error,except,ffi}.tl.
* share/txr/stdlib/{getopts,getput,hash,ifa}.tl:
Renamed to stdlib/{getopts,getput,hash,ifa}.tl.
* share/txr/stdlib/{keyparams,match,op,optimize}.tl:
Renamed to stdlib/{keyparams,match,op,optimize}.tl.
* share/txr/stdlib/{package,param,path-test,pic}.tl:
Renamed to stdlib/{package,param,path-test,pic}.tl.
* share/txr/stdlib/{place,pmac,quips,save-exe}.tl:
Renamed to stdlib/{place,pmac,quips,save-exe}.tl.
* share/txr/stdlib/{socket,stream-wrap,struct,tagbody}.tl:
Renamed to stdlib/{socket,stream-wrap,struct,tagbody}.tl.
* share/txr/stdlib/{termios,trace,txr-case,type}.tl:
Renamed to stdlib/{termios,trace,txr-case,type}.tl.
* share/txr/stdlib/{ver,vm-param,with-resources,with-stream}.tl:
Renamed to stdlib/{ver,vm-param,with-resources,with-stream}.tl.
* share/txr/stdlib/yield.tl: Renamed to stdlib/yield.tl.
* share/txr/stdlib/{txr-case,ver}.txr:
Renamed to stdlib/{txr-case,ver}.txr.
* gencadr.txr: Update to stdlib/place.tl.
* genman.txr: Update to stdlib/cadr.tl.
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