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A condition was a number, non-zero being true: a flag was a number field,
a view showed 1 for true, and nothing kept a number from standing for a
bool or a bool from being added to. Now the verifier has a bool among its
stack types, and a verified module never mixes the two. No opcode is new:
- CONST with argument 1 is a bool (+0 or 1), NUM_TEXT with argument 1
writes one as true or false; LOAD and STORE take a number or a bool
state, locals may hold a bool (2).
- Comparisons (LT to NE, TEXT_COMPARE) and LIST_HAS give a bool; AND, OR
and NOT take and give them; JZ, REQUIRE, filters and folds' tests take
one (count and first leave a bool, sum, max, min and distinct a number
and a bool); EQ and NE compare two bools too.
- Type codes: state 5, record field 2, message field 6 (one byte in the
prefix, 0 or 1, or the message fails as limit), view 3. A bool's
constant, initial value and default are +0 or 1; a list is not keyed by
one. PUREMOD6: v5 modules are built again.
At run time a bool is a number's 0 or 1, so leaf-at-a-time folds run as
before. A number that becomes a bool (a module replaced, a stored state
or item read again, a waiting send recast) keeps 0 (either sign) and 1
and takes the default otherwise; a bool that becomes a number is 0 or 1.
The host carries bools on every boundary: JSON true and false only (a
row's field too), a query's true and false, true and false in views,
table JSON and HTTP deliveries; a link takes a bool only into a bool.
A stored outbox's field types were read back with a check that refused
bool (at or past rows): a node whose output had a bool field and a send
waiting could not start again. test-module now stores such a send and
opens it (it fails on the old check), beside 28 bool refusals of the
verifier and bool states, fields, views, sends, links and migration.
The lane generator makes numbers and bools apart.
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A rows field's JSON value is an array of objects naming the record's
fields (numbers, strings; a field left out takes its default). The
connection thread encodes them as the list's stored form, which may be
longer than the JSON, grows the request's input by that much
(pure_runtime_grow: charged to the payload budget as admission charges an
input, 503 payload_budget when it does not fit) and places them after the
body, so the owner still applies a message it need not parse. A message
whose only variable field is rows takes a body that is not JSON as those
rows in their stored form: a bulk insert without JSON. An API's answer
(--reply) gives rows the same way. A delivered batch holds no rows.
server_rows loads 30,000 stock rows in one JSON request (some 250,000
rows a second, against 6,500 with a request a row) and 20,000 more as
bytes, refuses a load with a key already there whole (409 exists), then
checks 400 random orders against a model (294 applied, 106 refused with
none of their rows applied), texts with escapes and Korean, a walk that
removes, and a restart that keeps every state and no rows.
The format's document (008) describes walks, rows fields and lists of
rows, and OUTER_ROW.
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The app model, the tree store and the HTTP host lived in
prototypes/connections among the earlier document runtime, the store was
known only by its format's name, and Vega compiled six Pure sources by path.
Now, as the README's principle has it:
core/ runtime, flow and the app model (module*.c), with what the core
asks of storage (state.h, store.h)
store/ the tree store (PURETRE3, PUREREC1)
serve/ pure-serve: HTTP host, outbound delivery, JSON in place
cli/ pure-run, pure-edit-module
A top-level make builds libpure.a (app model and store, for hosts to link)
and the hosts; make check runs the store's and the app model's tests. The
earlier runtime still builds from prototypes/connections against core/ and
store/ (check, check-tree and check-core pass). Design 009 records the rule:
parts by role behind libraries; git repositories split by coupling, so the
store stays here while its contract moves with the core, and Vega stays apart.
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