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* genman.txr (dupes, tagnum): Replace defvar with defvarl.
* stdlib/doc-lookup.tl (os-symbol): Same.
* tests/011/macros-3.tl (x): Same.
* tests/011/mandel.txr (x-centre, y-centre, width, i-max, j-max, n)
(r-max, pixel-size, x-offset, y-offset): Same.
(file, colour-max): Delete (unused) variables.
* tests/012/circ.tl (x): Replace defvar with defvarl.
* tests/012/stack.tl (stack-limited): Same.
* tests/012/struct.tl (s): Same.
* tests/013/maze.tl (vi, pa, sc): Delete variables. Use
function arguments instead.
(usage): Fix typo.
* tests/014/dgram-stream.tl (family): Rename to...
(*family*): ...this.
* tests/014/socket-basic.tl (socktype): Rename to...
(*socktype*): ...this.
(%iters%): Replace defvar with defvarl.
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* eval.c (eval_init): Register intrinsic functions rcons,
rangep from and to.
(eval_init): Register rangep intrinsic.
* gc.c (mark_obj): Traverse RNG objects.
(finalize): Handle RNG in switch.
* hash.c (equal_hash, eql_hash): Hashing for for RNG objects.
* lib.c (range_s, rcons_s): New symbol variables.
(code2type): Handle RNG type.
(eql, equal): Equality for ranges.
(less_tab_init): Table extended to cover RNG.
(less): Semantics defined for ranges.
(rcons, rangep, from, to): New functions.
(obj_init): range_s and rcons_s variables initialized.
(obj_print_impl): Produce #R notation for ranges.
(generic_funcall, dwim_set): Recognize range objects for indexing
* lib.h (enum type): New enum member, RNG. MAXTYPE redefined
to RNG value.
(TYPE_SHIFT): Increased to 5 since there are now 16 type
codes.
(struct range): New struct type.
(union obj): New member rn, of type struct range.
(range_s, rcons_s, rcons, rangep, from, to): Declared.
(range_bind): New macro.
* parser.l (grammar): New rule for recognizing
the #R sequence as HASH_R token.
* parser.y (HASH_R): New terminal symbol.
(range): New nonterminal symbol.
(n_expr): Derives the new range symbol.
The n_expr DOTDOT n_expr rule produces rcons expression rather
than const.
* match.c (format_field): Recognize rcons syntax in fields
which is now what ranges translate to. Also recognize range
object.
* tests/013/maze.tl (neigh): Fix code which destructures
range as a cons. That can't be done any more.
* txr.1: Document ranges.
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* Makefile (tst/tests/013/maze.out): Add TXR_ARGS. Disable
gc-debugging for tests in new directory.
* tests/013/maze.expected: New file.
* tests/013/maze.tl: New file.
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