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no bytes by key, message by key, name[key] or .replace(first .. last, value), the opcodes DOC, DOC_SIZE and REPLACE (those after them moved up), the header 38 bytes; examples/editor.aup and bounded-editor.aup gone (examples/documents.aup does their work in a keyed list), and with them the parity with the earlier editor (documents_model checks the new one); diagnostics on documents rewritten for plain messages or gone (304); a module's records counted at their v7 place; a field changed by '=' said so where a call was written
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state, record, message, output and argument fields, lets, views, keys
and slices can be i64 (Pure 016 stage 2). An integer literal becomes
an i64 where the other side of an operation, a comparison or an
assignment is one; a literal-only side follows the other, found by
compiling it on trial and rolling back. + - * and negation fail the
event with overflow, / and % floor, and i64(x) and number(n) are the
only way between the two, so a mix is a diagnostic that says so.
The check adds 18 i64 diagnostics, i64 accepted forms (with a 30-deep
chain that must stay linear), an event-by-event program past 2^53
and at the edges, and i64 values in the generated programs.
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A condition was any number, non-zero being true: done was a number field,
a view showed 1 for true, and done + 1 was no type error. Now bool is its
own type (Pure 016, module format v6):
- true and false; comparisons, text comparisons, has and ! && || give a
bool. Bools are equal or not; they are no numbers and have no order.
- if, conditional expressions, require, where (folds, walks, filtered
tables) take a bool. Given a number, the diagnostic says how to make
one: "if takes a bool, not a number: compare it, as in n != 0".
- Bool states (state on = false), record fields (done = false), message,
output and argument fields (ok: bool), lets, views and columns.
Interpolation writes true or false. A list is not keyed by a bool.
- The examples' flags are bools (charge's holding, toggle's visible,
tasks' done).
Checks: 20 bool diagnostics, a form using bools everywhere, an app whose
every output shows true and false (states, items, views, columns, text)
and whose replacement turns a number into a bool and back. Models hold
bools and compare them strictly: Python's True == 1 no longer hides a 1
where a true belongs. Generated programs are typed, numbers and bools.
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Pure now keeps the app model, the store and pure-serve in core/, store/ and
serve/ with one top-level make; the earlier document server the parity
checks compare against stays in prototypes/connections.
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state xs: list of R by field keeps its items in that field's order, each
key once: xs.add(R { ... }) places an item (a taken key fails the event
with exists), xs[key] finds one by halving (its field, or its index),
xs.has(key) asks, xs.remove(key) removes. append and insert are refused
on a keyed list, add on another, and a key field is never assigned.
Texts compare with == != < <= > >= by their bytes.
Checked against a Python model over 3,600 random steps with a text-keyed
and a number-keyed list; 13 diagnostics; examples/tally.aup.
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A build records every path it opened or looked for and a digest of the
bytes there, so a rebuild happens exactly when one of them reads
differently: the source, a library (the one with the error too), or a
library appearing where one was searched. A change is built once it reads
the same twice in a row, so a file caught halfway through being written
is never built; the module is replaced whole through a rename.
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The list app and the text editor run on a tree store through pure-run
--store, restarting at random points, and must keep matching their
reference models. The language notes state that a declared state is a
stored state when the host gives a store.
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fn name(params) = value declares one expression, inlined where it is
called: arguments are computed once onto the stack and the body reads them
with PICK, so a fn costs no runtime call and keeps Pure's bound on work.
Parameters take any kind of value; recursion is a compile error.
use name reads name.aup beside the source or from AUP_PATH. A library
declares only fns and uses, sees only its parameters, and is called as
name.fn(...). Diagnostics now carry the file they are in, and the
compiler takes a loader so that sources come from the host.
examples/words.aup is such a library; examples/tasks.aup uses it and still
matches its reference model.
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if c { a } else { b }, with else-if chains, is an expression anywhere a
value goes. Only the chosen branch runs, every branch gives the same type,
and nesting that would pass Pure's limit of 8 value-carrying joins is a
compile error.
view name = each row in list { column = value ... } declares a table with
a row per item; columns read their row as an index of the list. An index
now reads and writes its item's fields directly (at.title, at.done = 1),
so 'position' cannot name a record field.
examples/tasks.aup gains conditional views and a board table and still
matches its reference model; a new check confirms the unchosen branch is
never computed.
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A record declares named number and text fields with defaults. A list of a
record is runtime-owned state, and an index of a list always names one of
its items: it follows its item across inserts and removes and stops at the
ends. Items are read and changed by field (tasks[at].title), appended or
inserted as record values whose missing fields take defaults, and removed
by index. Using an index of another list is a compile error.
examples/tasks.aup matches a Python reference model over 4,800 random steps,
including events that fail on an empty list. Replacing it with a module
whose record gained and reordered fields keeps every item.
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Record v0b as complete: which text syntax exists, what is still missing
(multi-line strings, formats, graphemes, words), the insertion rule for
cursors, and how the text model and parity checks verify it.
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aup now emits Pure module v2 and adds keyed byte collections
(state documents: bytes by key), message inputs by key with u32 and a
trailing bytes field, on-message handlers, field access, name[key] reads
and .bytes sizes, replace(a .. b, value), reply and require, all checked
for number/bytes types with file:line:column diagnostics.
The document editor and its size-bounded variant are rewritten in aup.
make check runs them through pure-edit-module against pure-edit running the
original editor.pure programs: 1,280 random show/edit/apply operations,
including conflicts, limits, missing documents, budgets and invalid keys,
produce byte-identical stdout, stderr and exit codes, and each CLI reads the
other's store identically. v0a parity with the workbench engine, 33
diagnostics and generated/damaged programs still pass, also with a
sanitizer-built compiler.
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aup check/build parse states, key inputs, views and handlers (with if/else
and else-if), resolve names, generate forward-only stack code and encode a
Pure module v1 deterministically. Diagnostics carry file:line:column.
make check loads every module with Pure's verifier, checks determinism, 20
diagnostics and accepted forms, replacement by name, 600 generated programs
and damaged sources (every emitted module verifies), and replays random event
scripts against the workbench Zig engine: 16,667 snapshots across counter,
toggle, charge, else-if and fault programs matched, including 921 failed
events. The sanitizer-built compiler passes the same checks.
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aup is the language and toolchain for the Pure runtime, as Java and javac
are for the JVM. v0a unifies the workbench scalar dialect (state, key
inputs, atomic handlers, views) with the same numeric semantics; v0b drafts
byte values and runtime-owned persistent documents to replace the document
dialect. Parity with the existing executors is the acceptance test.
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