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Joseph Ferano 99f519ba6f Two byte fills: (filled BYTE) and (sentinel-filled) 
DISCUSS.org's sentinel-fill idea, built as two builtins because the author
asked for both: a memset with a byte the program picks, and the fixed
DE AD BE EF pattern a hex dump reads as DEADBEEF.

Both are spelled the way (zeroed) is — the value of whatever type is
expected of them — so (set grid (filled 0xFF)) fills a place and there is
no second, place-taking form beside set.

What may be filled is numbers, and structs and fixed arrays built out of
them. Everything else is refused by name: a filled dyn is a collector root
pointing at nothing, a filled Vec header frees a wild address, a filled
slice length is a bounds check that passes, and a filled bool is an i1 to
LLVM and a whole byte to x86, which is the one divergence this feature
cannot have.

The byte fill is llvm.memset / rep stosb. The four-byte pattern cannot be
a memset on either side — the intrinsic takes one repeated i8 — so it is a
counted dword loop in emit.ml and rep stosd in x86.ml, with the pattern
bytes and their little-endian word living once, in Emit. A size that is
not a multiple of four ends on DE, DE AD, or DE AD BE.
2026-09-20 18:15:19 +07:00
..
assets
defjson, which shares the design and not a line of the code
2026-09-19 06:41:57 +07:00
pkgs
Sets are read, and the reader that answers a Value is the package's
2026-09-18 22:50:54 +07:00
agent-longname.flan
Sweep every field label from the colon spelling to the dot
2026-09-12 14:47:54 +07:00
agent-queue.flan
Two of the four buffers with no evidence now have some
2026-09-12 10:47:41 +07:00
agent.flan
Retire the per-type printers, since print says all of it
2026-09-12 05:32:25 +07:00
algorithms.flan
The ! suffix retires: a mutator is named for what it does, not marked
2026-09-19 05:21:02 +07:00
allocators.flan
Allocator is a builtin opaque type, so the arena needs nothing from milestone 5
2026-09-12 10:55:18 +07:00
arena-region.flan
The refusal was about teardown, and a region has none
2026-09-17 20:37:08 +07:00
arena-value.flan
The refusal was about teardown, and a region has none
2026-09-17 20:37:08 +07:00
arith-condition.flan
A divide by zero names the file and the line, and is answerable
2026-09-13 22:55:26 +07:00
arith.flan
The two cases that would have passed while being wrong
2026-09-13 23:09:08 +07:00
array-ctor.flan
A let binding has no type slot, so (array 4 T) is how you say it
2026-09-12 21:48:08 +07:00
bounds-condition.flan
Every citation of a moved document now resolves from where it is written
2026-09-14 07:12:27 +07:00
bounds.flan
A reversed slice is not a slice, in every build
2026-09-18 07:36:21 +07:00
break.flan
Sweep every field label from the colon spelling to the dot
2026-09-12 14:47:54 +07:00
bytes2.flan
Every defn in the tree states its return type, and Unit is written ()
2026-09-12 23:06:40 +07:00
cleanup.flan
Every defn in the tree states its return type, and Unit is written ()
2026-09-12 23:06:40 +07:00
conditions.flan
The return type stops being a guess: the slot is mandatory, unit is ()
2026-09-12 23:18:28 +07:00
datas.flan
The tagged sum is defdata, and the old spelling is an error by name
2026-09-17 19:03:27 +07:00
debug-permuted.flan
Sweep every field label from the colon spelling to the dot
2026-09-12 14:47:54 +07:00
debug.flan
Sweep every field label from the colon spelling to the dot
2026-09-12 14:47:54 +07:00
defer-let.flan
Every defn in the tree states its return type, and Unit is written ()
2026-09-12 23:06:40 +07:00
defvar-dyn.flan
A defvar's third element decides: a type is the static, anything else is dyn
2026-09-20 15:00:15 +07:00
destructure.flan
Every defn in the tree states its return type, and Unit is written ()
2026-09-12 23:06:40 +07:00
dev-break-bounds.flan
Every citation of a moved document now resolves from where it is written
2026-09-14 07:12:27 +07:00
dev-break.flan
Sweep every field label from the colon spelling to the dot
2026-09-12 14:47:54 +07:00
dev-chatty.flan
A program that prints is not a program that stopped polling
2026-09-18 07:31:25 +07:00
dev-class.flan
A method added to a running program, proved end to end
2026-09-20 15:36:13 +07:00
dev-dyn-global.flan
The park kept the frames' roots off and the globals' on
2026-09-20 11:06:14 +07:00
dev-globals.flan
The globals a stopped stack reaches, in one section and not under a frame
2026-09-12 16:22:58 +07:00
dev-inspect.flan
The tagged sum is defdata, and the old spelling is an error by name
2026-09-17 19:03:27 +07:00
dev-locals.flan
Sweep every field label from the colon spelling to the dot
2026-09-12 14:47:54 +07:00
dev-loop.flan
Sweep every field label from the colon spelling to the dot
2026-09-12 14:47:54 +07:00
dev-macro.flan
A macro module keeps its own prelude, and --x86 gets the merged daemon
2026-09-17 19:50:29 +07:00
dev-noagent.flan
Memcheck is told an arena reset happened, and the agentless session is pinned
2026-09-13 17:55:00 +07:00
dev-pause.flan
A pause is waited for by name, and a build is not a socket
2026-09-13 13:07:25 +07:00
dev-ptr.flan
An address answers with a type, and a killed program is asked rather than hooked
2026-09-13 15:27:31 +07:00
dev-repl.flan
A socket file must not outlive the process that bound it
2026-09-14 08:11:35 +07:00
dev-rerun.flan
A three-element defvar reads its third element: a type is zeroed static, anything else is dyn
2026-09-20 15:14:56 +07:00
dev-robust.flan
A failed build is a refusal, and a refusal leaves the session standing
2026-09-13 19:43:18 +07:00
dev-trap-free-all.flan
A trap with no channel stops the program, not the session
2026-09-18 13:47:42 +07:00
dev-trap-null-alloc.flan
A trap with no channel stops the program, not the session
2026-09-18 13:47:42 +07:00
dev-watch.flan
A hot loop keeps five numbers, and the window is the editor's
2026-09-13 10:35:20 +07:00
dyn-basic.flan
One unannotated add, answering 5 to the integers and 3.75 to the floats
2026-09-19 05:55:48 +07:00
dyn-boundary.flan
--no-gc is a pass, not a flag the emitter can see
2026-09-19 06:33:28 +07:00
dyn-cast.flan
The corpus program for a cast that opens a box
2026-09-20 13:54:07 +07:00
dyn-class.flan
A method's parameter names are bound in parallel, not in sequence
2026-09-20 15:36:27 +07:00
dyn-defer.flan
Four dyn values in a defer the collector had never been told about
2026-09-19 06:40:53 +07:00
dyn-global.flan
Roots, pushed where the addresses are stable and popped where the frame leaves
2026-09-19 06:12:41 +07:00
dyn-host.flan
A value carries its own type, and the heap under it collects
2026-09-19 05:52:47 +07:00
dyn-if-truthy.flan
and hands back its deciding operand too, and both locs get sharper
2026-09-20 10:36:05 +07:00
dyn-map.flan
Dyn maps, keywords and nil land: milestone 2's first item
2026-09-19 19:44:56 +07:00
dyn-struct.flan
Five back from review, and the first one was the mangle eating a type
2026-09-19 22:53:16 +07:00
dyn-vec.flan
A container holding an integer, a float, a string and a boolean at once
2026-09-19 06:06:44 +07:00
dyn-view.flan
A slice level after the first index was invisible to the lifetime rule
2026-09-20 10:51:22 +07:00
edn-provide.flan
A file that does not parse says so, and the provider is written down
2026-09-19 06:59:22 +07:00
edn-read.flan
Dyn maps, keywords and nil land: milestone 2's first item
2026-09-19 19:44:56 +07:00
edn.flan
Sets are read, and the reader that answers a Value is the package's
2026-09-18 22:50:54 +07:00
embed.flan
Assets are baked in at compile time, one file or one whole directory
2026-09-12 11:36:01 +07:00
enum-compare.flan
Sweep every field label from the colon spelling to the dot
2026-09-12 14:47:54 +07:00
enum-convert.flan
An enum and an integer convert, both ways, when you say so
2026-09-12 09:11:34 +07:00
error.flan
Sweep every field label from the colon spelling to the dot
2026-09-12 14:47:54 +07:00
exhausted-unhandled.flan
(Vec T) over a type-erased runtime, with StorageExhausted going in beside it
2026-09-12 11:07:57 +07:00
exhausted.flan
The return type stops being a guess: the slot is mandatory, unit is ()
2026-09-12 23:18:28 +07:00
files.flan
Files beyond slurp and barf, split by whether a handler could act
2026-09-17 22:04:48 +07:00
fill.flan
Two byte fills: (filled BYTE) and (sentinel-filled)
2026-09-20 18:15:19 +07:00
fn-capture.flan
A bare name is the function, and capture is the part that is not built
2026-09-12 22:44:33 +07:00
fn-extern.flan
A bare name is the function, and capture is the part that is not built
2026-09-12 22:44:33 +07:00
fn-in-struct.flan
A bare name is the function, and capture is the part that is not built
2026-09-12 22:44:33 +07:00
fn-no-type.flan
A bare name is the function, and capture is the part that is not built
2026-09-12 22:44:33 +07:00
fn-values.flan
The ! suffix retires: a mutator is named for what it does, not marked
2026-09-19 05:21:02 +07:00
format.flan
The ! suffix retires: a mutator is named for what it does, not marked
2026-09-19 05:21:02 +07:00
frame-rollback.flan
Every citation of a moved document now resolves from where it is written
2026-09-14 07:12:27 +07:00
free-all-refused.flan
Say what the two one-line refusal programs are refusing, and why
2026-09-12 11:15:58 +07:00
generic-map-reject.flan
The map operations are deferred, and the clause is what pays for it
2026-09-13 15:23:37 +07:00
generic-reject.flan
The prelude's per-type families collapse: 22 functions become 10, 27 become 16
2026-09-13 14:49:11 +07:00
generic-runaway.flan
The move-only concept follows the flow analysis out: everything copies, and the frees are yours
2026-09-18 12:16:05 +07:00
generics.flan
The ! suffix retires: a mutator is named for what it does, not marked
2026-09-19 05:21:02 +07:00
global-init.flan
A global's initialiser may be computed, and both backends run it the same way
2026-09-19 04:24:52 +07:00
handler-case.flan
The survey was counting the defers, not watching them
2026-09-19 21:13:03 +07:00
higher-order.flan
The ! suffix retires: a mutator is named for what it does, not marked
2026-09-19 05:21:02 +07:00
init-conditions.flan
The defer counter costs something on the warm path, and the valgrind row rests on one half
2026-09-19 21:59:11 +07:00
into.flan
The two cases the tests did not cover, and one leak of a permission
2026-09-13 09:32:58 +07:00
json-provide.flan
defjson, which shares the design and not a line of the code
2026-09-19 06:41:57 +07:00
json.flan
Dyn maps, keywords and nil land: milestone 2's first item
2026-09-19 19:44:56 +07:00
loops.flan
Pin the latch to the continue path, and the clause barrier to its reason
2026-09-12 22:00:13 +07:00
machine.flan
Every defn in the tree states its return type, and Unit is written ()
2026-09-12 23:06:40 +07:00
macro-cycle.flan
unless is not a special form any more
2026-09-12 20:59:12 +07:00
macro-spin.flan
unless is not a special form any more
2026-09-12 20:59:12 +07:00
macro-unless.flan
The return type stops being a guess: the slot is mandatory, unit is ()
2026-09-12 23:18:28 +07:00
macros.flan
unless is not a special form any more
2026-09-12 20:59:12 +07:00
map-exhausted.flan
The return type stops being a guess: the slot is mandatory, unit is ()
2026-09-12 23:18:28 +07:00
map-iter.flan
The ! suffix retires: a mutator is named for what it does, not marked
2026-09-19 05:21:02 +07:00
map-remove.flan
The ! suffix retires: a mutator is named for what it does, not marked
2026-09-19 05:21:02 +07:00
map-stale-region.flan
The Map's tests join the suite, and the epoch trap covers its half
2026-09-12 16:09:27 +07:00
maps.flan
Cover a dev build and a map that leaves its let
2026-09-12 16:34:25 +07:00
math2.flan
Every defn in the tree states its return type, and Unit is written ()
2026-09-12 23:06:40 +07:00
math3.flan
The init-once flag moves out of the namespace a program can write
2026-09-20 13:07:09 +07:00
math.flan
Every defn in the tree states its return type, and Unit is written ()
2026-09-12 23:06:40 +07:00
nil-option.flan
nil <-> None at (Option T) boundaries, and (Some nil) unconstructible — M2 queue item 4
2026-09-20 07:20:27 +07:00
nth-gone.flan
Remove nth, the alias that was not one
2026-09-12 04:46:41 +07:00
pkg-alias-clash.flan
A ring of imports is refused by name, not swallowed
2026-09-12 16:46:30 +07:00
pkg-cycle.flan
A ring of imports is refused by name, not swallowed
2026-09-12 16:46:30 +07:00
pkg-data.flan
Sets are read, and the reader that answers a Value is the package's
2026-09-18 22:50:54 +07:00
pkg-diamond.flan
A ring of imports is refused by name, not swallowed
2026-09-12 16:46:30 +07:00
pkg-hidden-main.flan
sand is one program again
2026-09-11 20:11:01 +07:00
pkg-macro-bare.flan
Macros come from a package now, and the refusal's reason was wrong
2026-09-13 15:40:08 +07:00
pkg-macro-idle.flan
C-x C-e expands, and a declaration is not an expression
2026-09-13 17:54:36 +07:00
pkg-macro-ring.flan
Macros come from a package now, and the refusal's reason was wrong
2026-09-13 15:40:08 +07:00
pkg-macro-spin.flan
Macros come from a package now, and the refusal's reason was wrong
2026-09-13 15:40:08 +07:00
pkg-macro.flan
Macros come from a package now, and the refusal's reason was wrong
2026-09-13 15:40:08 +07:00
pkg-return.flan
Sweep every field label from the colon spelling to the dot
2026-09-12 14:47:54 +07:00
pkg-shadow.flan
A local shadowing an imported name, in an expression and in a place
2026-09-12 10:40:47 +07:00
pkg-shared.flan
Retire the per-type printers, since print says all of it
2026-09-12 05:32:25 +07:00
pkg-two-aliases.flan
sand is one program again
2026-09-11 20:11:01 +07:00
pkg-two-mains.flan
sand is one program again
2026-09-11 20:11:01 +07:00
pkg-unused.flan
Retire the per-type printers, since print says all of it
2026-09-12 05:32:25 +07:00
printers.flan
A promise the compiler cannot check gets its own refusal, and a session expands its buffer's macros
2026-09-13 20:33:47 +07:00
println.flan
The return type stops being a guess: the slot is mandatory, unit is ()
2026-09-12 23:18:28 +07:00
raylib-audio.flan
Every defn in the tree states its return type, and Unit is written ()
2026-09-12 23:06:40 +07:00
raylib-codepoints.flan
Both raylib workarounds, and where the second one went instead
2026-09-14 08:37:30 +07:00
raylib-ffi.flan
The renderer was one binding away, and the import was not allowed to be the answer
2026-09-13 07:50:03 +07:00
raylib-font.flan
Every defn in the tree states its return type, and Unit is written ()
2026-09-12 23:06:40 +07:00
raylib-image-processing.flan
Nine filters that rewrite the buffer they are handed, and the half of them a headless run can pin
2026-09-13 23:22:37 +07:00
raylib-image.flan
The renderer was one binding away, and the import was not allowed to be the answer
2026-09-13 07:50:03 +07:00
raylib-imported.flan
A table for the importer, against a header that does not move
2026-09-12 16:09:48 +07:00
reach-walk.flan
The prelude's per-type families collapse: 22 functions become 10, 27 become 16
2026-09-13 14:49:11 +07:00
recur.flan
The two cases the tests did not cover, and one leak of a permission
2026-09-13 09:32:58 +07:00
registry.flan
Pool and Handle leave the language: two containers are enough, and a slab is a Vec you free less often
2026-09-18 11:56:22 +07:00
reload-agg-v2.flan
Every citation of a moved document now resolves from where it is written
2026-09-14 07:12:27 +07:00
reload-agg.flan
Every citation of a moved document now resolves from where it is written
2026-09-14 07:12:27 +07:00
reload-generic.flan
The ! suffix retires: a mutator is named for what it does, not marked
2026-09-19 05:21:02 +07:00
reload-v2.flan
A global Vec is borrowed, never moved, and outlives every entry to main
2026-09-17 18:42:01 +07:00
reload-v3.flan
A global Vec is borrowed, never moved, and outlives every entry to main
2026-09-17 18:42:01 +07:00
reload-v4.flan
Retire the per-type printers, since print says all of it
2026-09-12 05:32:25 +07:00
reload-v5.flan
Retyping a global across a reload, which nothing had ever done
2026-09-12 10:51:14 +07:00
reload-v6.flan
A name the host was never built with, compiled by the x86 backend
2026-09-14 10:16:42 +07:00
reload.flan
A global Vec is borrowed, never moved, and outlives every entry to main
2026-09-17 18:42:01 +07:00
reserve-overflow.flan
A byte count that cannot be represented is StorageExhausted, not a smaller block
2026-09-17 21:49:40 +07:00
restarts.flan
Sweep every field label from the colon spelling to the dot
2026-09-12 14:47:54 +07:00
rl-with-reject.flan
A begin/end pair that cannot come apart, and what it still cannot promise
2026-09-13 18:00:35 +07:00
rl-with.flan
A begin/end pair that cannot come apart, and what it still cannot promise
2026-09-13 18:00:35 +07:00
sand-headless.flan
Retire the per-type printers, since print says all of it
2026-09-12 05:32:25 +07:00
shadow-pkg.flan
A local shadowing an imported name, in an expression and in a place
2026-09-12 10:40:47 +07:00
shim-nul.flan
Four places the runtime answered with something other than the truth
2026-09-17 22:17:19 +07:00
signedness.flan
Retire the per-type printers, since print says all of it
2026-09-12 05:32:25 +07:00
slice-from-ptr.flan
A pointer from C can state its length, and then it is a slice
2026-09-13 17:40:59 +07:00
slices.flan
The ! suffix retires: a mutator is named for what it does, not marked
2026-09-19 05:21:02 +07:00
slurp-unhandled.flan
slurp reads a whole file, barf writes one, and failure is a condition
2026-09-12 11:38:24 +07:00
slurp.flan
slurp reads a whole file, barf writes one, and failure is a condition
2026-09-12 11:38:24 +07:00
some-nil.flan
nil <-> None at (Option T) boundaries, and (Some nil) unconstructible — M2 queue item 4
2026-09-20 07:20:27 +07:00
stale-region.flan
(Vec T) over a type-erased runtime, with StorageExhausted going in beside it
2026-09-12 11:07:57 +07:00
string-eq.flan
The batch from two reviews plus the acceptance exit code, item by item
2026-09-19 21:18:57 +07:00
string-of-bytes.flan
Every defn in the tree states its return type, and Unit is written ()
2026-09-12 23:06:40 +07:00
strings.flan
The ! suffix retires: a mutator is named for what it does, not marked
2026-09-19 05:21:02 +07:00
text.flan
The prelude's per-type families collapse: 22 functions become 10, 27 become 16
2026-09-13 14:49:11 +07:00
time.flan
The monotonic origin bound measures the clock, not the machine
2026-09-20 11:53:37 +07:00
two-numbers.flan
A rendered number goes in the caller's frame, not in one buffer for the process
2026-09-17 22:55:30 +07:00
unions.flan
defunion is C's union, and reading the member you did not write is defined
2026-09-17 19:54:32 +07:00
unit-main.flan
The return type stops being a guess: the slot is mandatory, unit is ()
2026-09-12 23:18:28 +07:00
user-allocator.flan
Say what the two one-line refusal programs are refusing, and why
2026-09-12 11:15:58 +07:00
utf8.flan
The ! suffix retires: a mutator is named for what it does, not marked
2026-09-19 05:21:02 +07:00
values.flan
Sweep every field label from the colon spelling to the dot
2026-09-12 14:47:54 +07:00
vec-double-free.flan
(Vec T) over a type-erased runtime, with StorageExhausted going in beside it
2026-09-12 11:07:57 +07:00
vec-global.flan
A global Vec is borrowed, never moved, and outlives every entry to main
2026-09-17 18:42:01 +07:00
vec-in-struct.flan
The move-only concept follows the flow analysis out: everything copies, and the frees are yours
2026-09-18 12:16:05 +07:00
vec-moved-in-loop.flan
(Vec T) over a type-erased runtime, with StorageExhausted going in beside it
2026-09-12 11:07:57 +07:00
vec-moved.flan
(Vec T) over a type-erased runtime, with StorageExhausted going in beside it
2026-09-12 11:07:57 +07:00
vec-to-c.flan
Ownership is not transitive yet, so refuse the three shapes that assume it is
2026-09-12 11:12:49 +07:00
vec-untyped.flan
(Vec T) over a type-erased runtime, with StorageExhausted going in beside it
2026-09-12 11:07:57 +07:00
vec.flan
Sweep every field label from the colon spelling to the dot
2026-09-12 14:47:54 +07:00
virtual-controls-headless.flan
Sweep every field label from the colon spelling to the dot
2026-09-12 14:47:54 +07:00
web-files.flan
One source, two outcomes: barf is refused on the web and says so
2026-09-12 11:41:24 +07:00