An untyped JavaScript `let` initialized with an object literal took the
initializer's record shape. A later assignment of an object literal with
more properties (`state = { _tag: "PullLeft", right }`, as in Effect's
Stream.zip) stored the object, but reading the added property failed with
SC1090. Such a binding now uses checked-dynamic storage, as it already does
when the program adds a property through the binding, so the added
properties read back and missing ones read as undefined, as in Node.
Closes#937
Co-authored-by: phall <25888173+phall1@users.noreply.github.com>
Object.setPrototypeOf and Object.create threw "Object prototype may only be
an Object or null" without the value Node appends. The message now ends
with the value's string form, as in Node: "...: 7", "...: undefined",
"...: Symbol(tag)".
A prototype or receiver that is a valid object of a kind these functions
do not handle yet (a function or Map prototype for Object.create, a Map
prototype or receiver for Object.setPrototypeOf) threw the same TypeError.
It now throws an Error that says the operation is not supported for that
value.
Each instantiation of a generic class names the generic class as its base,
and the generic class has no constructor function. The cycle analysis
treated a base without a constructor function as one whose constructor let
`this` escape, so every store in an instantiation's constructor counted as
a write after construction. A generic class could not be declared Acyclic,
and its constructor-only references were never treated as immutable.
A program class without a constructor function runs no code at
construction, so it now lets nothing escape. Runtime classes keep the
conservative answer.
The --layouts padding object was linked directly before the program
object. The runtime is linked before the program object, so every layout
moved only the program's code and left each runtime function at the same
address. A change to the runtime's code size then moved its functions in
all layouts at once, and the verdicts could not tell that placement
change from a real one.
The padding object now goes before every other input on the link line,
so each layout shifts the runtime and the program code.
A package function that destructures its options object, such as
makeClass({ Base, name }), now specializes per call site like positional
parameters: each destructured name binds the static type of the matching
property, so a class passed as { Base } keeps its static type and
class extends Base builds a constructible subclass.
Fixes#938
Co-authored-by: phall <25888173+phall1@users.noreply.github.com>
The shard balance test reads measured costs for corpus programs. Add
plain and sanitized costs for 5950, 5951, 5955 and 5956, timed locally
and scaled to the CI runners' existing entries.
The shard balance check needs measured costs for at least 90% of the
corpus programs. Add plain and sanitized costs for 5970, 5971 and 5972,
timed locally and scaled to the CI runner by comparable net programs.
After socket.setEncoding("utf8"), Node passes strings to 'data'
listeners, while @types/node types the chunk as a Buffer. An inline
listener whose chunk is typed Buffer (annotated or inferred) received a
Buffer. When a program can call setEncoding on a socket, such listeners
now take the chunk as a checked dynamic value, so console.log, typeof,
string methods and concatenation behave as in Node, and Buffer-only
methods throw Node's TypeError. Programs without setEncoding on a socket
compile to the same IR as before.
Chunks from net sockets (including socket.read()), http messages and
upgrade heads, child_process output, dgram messages, http2 streams and
TLS sessions were byte arrays without the Buffer brand. String
conversion of them joined the byte values ("112,105,110,103") instead
of decoding UTF-8, so `body += chunk` and template literals differed
from Node. They are now Buffers, as in Node.
Closes#903
Co-authored-by: João Carlos Magalhães de Castro <88864312+JohnC0de@users.noreply.github.com>
A class behind an interface whose method is generic now dispatches to
the method's erased instance, so the boundary test compiles the program
instead of expecting the old refusal.
Fixes#905
Co-authored-by: Konstantin Mikheev <8560582+konmik@users.noreply.github.com>
An override whose return type is part of the base method's union return
(`Meta` for `Meta | undefined`, `number` for `number | undefined`, or a
subclass of one of the union's class arms) was refused with SC1090,
although TypeScript accepts it. The override now returns through the
base's union ABI, so calls through the base type receive the value
unchanged, and calls resolved to the override narrow the result back to
its declared type.
`value.valueOf()` on a dynamic receiver was refused at compile time, a
class's own toString was not reached by `value.toString()`, and classes
could not declare a `[Symbol.toPrimitive]` method.
- `value.valueOf()` lowers to dyn.valueOf, which answers each kind's own
valueOf: a primitive itself, a Date its time value, an object with a
valueOf member that member's result, and any other object itself. A
null-prototype dictionary throws "<spelling> is not a function", and
null and undefined throw Node's property-read TypeError.
- When a boxed class declares valueOf or toString, `value.valueOf()` and
`value.toString(argument)` call the class's method for its instances
and keep the runtime call for every other value.
- Classes can declare `[Symbol.toPrimitive](hint)`. The dynamic
conversions call it with "default" for `+` and `==`, "number" for the
numeric operators and conversions, and "string" for template literals,
String() and property keys, and throw Node's TypeError when it returns
an object.
Buffer.write(text, "utf16le") zero-extended an ASCII run eight bytes per
step with shifts and masks in 64-bit words. Where the target has vector
unpacks (SSE2 on x86-64, NEON on AArch64) it now widens sixteen bytes
per step: one load, a test of the high bits, and two unpacked stores.
The word loop stays for the remaining bytes and for other targets. A
scanner that fills a Uint16Array of code units this way, as tsc-ts does
once per source file, spends about half as long in the copy.
Generic arrow properties and generic methods now have an erased runtime
value, their instance with every type parameter bound to unknown. Calls
through a round trip via any, a function result, an array element or a
class-backed interface call that value and convert the result to the
call's type, as JavaScript does. Direct calls on a known definition keep
their monomorphized path.
Fixes#905
Co-authored-by: Konstantin Mikheev <8560582+konmik@users.noreply.github.com>
- The EventEmitter leak warning reaches process 'warning' listeners on the next tick
- The events listener-count and max-listener helpers work over EventEmitter instances
- timers/promises setTimeout, setImmediate and scheduler.wait accept an AbortSignal
- timers/promises scheduler.wait and scheduler.yield are lowered
A static method that a function-local JavaScript class defines at
runtime and a program class inherits (Animal.extend("Dog")) is now
called directly with this bound to the receiver class when it captures
nothing from the factory's scope, so the subclass it builds has a static
base and constructs like Node.
Fixes#938
Co-authored-by: phall <25888173+phall1@users.noreply.github.com>
net.connect and net.createConnection dialed only IP literals and
"localhost"; any other host name failed with getaddrinfo ENOTFOUND
without a lookup, so names served by /etc/hosts or a container's DNS
(such as Docker service names) did not connect. The dial now resolves
the name with getaddrinfo using Node's hints, orders the addresses as
Node's autoSelectFamily does, and tries them in order.
Fixes#1156
Co-authored-by: Quim T. <26749475+espetro@users.noreply.github.com>
The WebAssembly and platform docs now say that wasm32-wasi builds need
zig and the @scriptc/runtime-wasm32-wasi package where the target is
introduced. A missing cross-target runtime pack still reports SC3003
with the package name and version; its hint now says that scriptc
includes the runtime pack for its own platform only, instead of
suggesting a reinstall with optional dependencies.
Fixes#717
Co-authored-by: guest271314 <4174848+guest271314@users.noreply.github.com>
m.groups on a match row compiles when the row's regex is statically
known. The row can now also be the element parameter of an inline
callback over a matchAll drain (map, forEach, filter, find, findLast,
some, every, flatMap) or Array.from's mapping function over s.matchAll(re).
In JavaScript sources such a parameter holds the row as a checked-dynamic
value without its groups, and the read is refused instead of reading
undefined.
The ESNext error lib is now part of the type world, and Error.isError(value)
compiles. A catch binding tests its payload against the Error class, an
unknown value tests the checked-dynamic error encoding, and a union tests its
runtime tag against the arms whose class extends Error. Other values answer
statically: true for instances of Error and its subclasses, false for
everything else, including objects that only have an error's shape. The
argument is always evaluated. Unions with unknown arms are refused.
Chris Tate