OptionalcauseReadonlycodeStable kind, safe to compare against a literal and to send over a
wire. Rides on Skipped.code when a run reports rather than throws.
OptionalstackStatic ReadonlycodeThe literal a subclass overrides. Read via new.target, not this.
StaticstackThe Error.stackTraceLimit property specifies the number of stack frames
collected by a stack trace (whether generated by new Error().stack or
Error.captureStackTrace(obj)).
The default value is 10 but may be set to any valid JavaScript number. Changes
will affect any stack trace captured after the value has been changed.
If set to a non-number value, or set to a negative number, stack traces will not capture any frames.
StaticcaptureCreates a .stack property on targetObject, which when accessed returns
a string representing the location in the code at which
Error.captureStackTrace() was called.
const myObject = {};
Error.captureStackTrace(myObject);
myObject.stack; // Similar to `new Error().stack`
The first line of the trace will be prefixed with
${myObject.name}: ${myObject.message}.
The optional constructorOpt argument accepts a function. If given, all frames
above constructorOpt, including constructorOpt, will be omitted from the
generated stack trace.
The constructorOpt argument is useful for hiding implementation
details of error generation from the user. For instance:
function a() {
b();
}
function b() {
c();
}
function c() {
// Create an error without stack trace to avoid calculating the stack trace twice.
const { stackTraceLimit } = Error;
Error.stackTraceLimit = 0;
const error = new Error();
Error.stackTraceLimit = stackTraceLimit;
// Capture the stack trace above function b
Error.captureStackTrace(error, b); // Neither function c, nor b is included in the stack trace
throw error;
}
a();
OptionalconstructorOpt: FunctionStaticprepare
Thrown when a spec's input list does not match the op's declared arity — including a spec carrying no
inputsat all.Its own class because arity is decidable from the registry alone, with no data bound: it is part of what
specIdcan judge, and a spec that fails it must not be named in the valid id namespace. Before this, a spec with noinputswas namedp1:sma(;period=20)— a valid id for something that cannot compile — and then died atcompileas a bareTypeErrorreading.lengthof undefined, reaching the consumer as aSkippedwith nocodeat all, which under that contract means "op code threw" (Tidal, on 0.62.0).