Release information

0.5.0

Support for floating point numbers.
Basic Unicode support: I/O is done in UTF-8.
New builtin subs/macros: acond caar? caar* cadr? cadr* case cdar? cdar* cddr? cddr* last read-line str* str-ascii-lower str-pad str-padr str-pos? str-select with-dst with-gensyms with-src with-stderr with-stdin with-stdout
New standard library module std/prog-args for parsing program arguments. It contains the subs: parse-prog-args say-prog-args-help
New standard library module std/log for logging. It contains the subs/macros: log with-log
(lisp-info 'posix) returns 0 if POSIX module is used (#f otherwise).
New POSIX bindings: call exec str-now sys.ctime? sys.execvp? system wait-for
All internal structures are resized dynamically, so there are no arbitrary limits anymore.
The interpreter takes up less permanent memory space.
The documentation generator understands basic command line options now.

New standard library module std/tap which implements incomplete, but TAP-conformant testing. It contains the subs/macros: test test-error test-plan test-plan-end
Show origin of anonymous subs in backtrace.
if allows an else-branch of arbitrary size; when the else branch is empty but would be taken, #f is returned.
Extended fixnum range from 32 to 60 bits.
Allow mutual recursion: You can declare a binding before you define it.
The stack size is now increased dynamically, so there is no arbitrary limit anymore.
New reader macro in std/alist: #=> allows convenient notation for association lists.
Introduced a (limited) destructuring binding construct: destructure; it can only destructure proper lists currently (without nesting).
New builtin subs: all? any? car* cdr* chr-skip dup find? flatten partial str-join
New POSIX bindings: gettimeofday sys.gettimeofday? timeofday-diff
New module std/bench with subs: measure-time say-time
New subs in std/math: count iota iota*
mapx was removed - it was more confusing than helpful.
each got the order of args reversed to be consistent with everything else.

Support for I/O: Read from *src*. Print to *dst*. Also define *stdin*, *stdout* and *stderr*. Provide macros: with-file-dst with-file-src with-stderr
You can specify a script file on the command line; you can also use Unix #! notation to specify the interpreter in the file. (If a file starts with #, the first line is ignored.)
Added the documentation generator gendoc.bn.
The reader macro #eval allows read-time evaluation.
New builtin subs and macs: awhen drop dropr dst? eof? num->str sort src? str-dropr str-empty? str-prefix? str-take str-taker sym->str take taker
New POSIX bindings: sys.dst-close? sys.dst-open? sys.random sys.src-close? sys.src-open?
New standard library module std/random containing: random-choice
New standard library module std/bases containing the reader macros: #bin #oct #hex #in-base
New standard library module std/alist containing: simplify-alist
Moved these subs from prelude to new standard library module std/math: max min percent
Module std/math additionally contains: abs difference even? iota mean odd? sum
Read access to dynamically scoped variables is faster as it avoids the hash table lookup. Write access is also faster as it only does a single lookup.
Show line numbers on parse errors.

Dynamic scoping is now possible via defvar and with-var.
Reader macros can be registered with defreader or myreader.
You can code character constants with the reader macro #chr.
Errors now just bring you back to the REPL like they should.
The previous values on the REPL are available via $ and $$.
You can access the command line args via *program-args*.
Load code from source files with (use file1 file2 ...); the file extension .bn will be added automatically. Reload files with (reload foo).
Possibly endless loops that won't run out of memory can be implemented with reg-loop.
You can do recursive definitions not only with defsub, but also with the other binding constructs: mysub, internsub, defmac, mymac and internmac
All of the above binding constructs allow to avoid the implicit lambda (as in Scheme). So you can say: (mysub atom? (compose not cons?))
New library subs: 0? >0? <0? assocar? car? cat-lists cdr? compose chr-look chr-read equal? err fold foldr lisp-info max min percent read reader-bound? unfold unfoldr var-bound? version
Changed argument order of nth and nth-cons.
Replaced str-skip with str-drop.