TypeShade
ExternFn
Type in Authoring
A typed call-only handle for a function whose definition is provided elsewhere: the forward-declaration counterpart to fn().
import type { ExternFn } from 'typeshade'
The signature, the description and the examples come from the compiler's own source at commit 26de7be8.
Syntax
type ExternFn<P extends ParamSpec, R extends ShaderType> = { /** Typed object-param call, with the same argument union as {@link FnHandle}: arguments * are read, so read-only nodes (`Let` results, parameters) and raw numbers, lifted to the * declared parameter type, are accepted. */ (args: { readonly [K in keyof P]: ReadonlyNode<KeyOf<P[K]>> | number }): Node<KeyOf<R>>; /** Positional call. Arguments are matched to the parameters in declaration order. */ (...args: NodeLike[]): Node<KeyOf<R>>;};Description
Use it when the callee cannot be an importable
FnHandle at the caller’s module-load time, for instance a function a host builds
from configuration after the calling module has already authored its body. The handle
carries only the signature (name, parameter types and return type), so the caller makes a
typed call now, object-param f({ a, b }) or positional f(a, b), and the host links the
body in at emit. The emitted node is a call by name.
See also
Source
src/core/ir/builder.ts, line 1048, at commit 26de7be8