uniform

declare function uniform<T>(slot?: number | { group?: number; binding?: number }, binding?: number): ReadView<T>

A number in a parameter or a return position is the scalar slot. The ambient file declares a GPU scalar as a branded number whose brand is optional, so a literal and any branded scalar both fill it.

type f32 = number & { readonly [f32Tag]?: true }

A declaration you write still needs a width, and a bare number on a field or a parameter is refused; the TypeScript constructs page carries that row with the compiler's own message.

A signature may name a type the ambient file declares for its own use. These are those declarations.

ReadView

type ReadView<T> = T extends number | boolean ? T : T extends (...args: never[]) => unknown ? T : { readonly [K in keyof T]: K extends string | number ? ReadView<T[K]> : T[K] }