import { APPLICABILITY_KINDS, LOOKUP_RESULT_KINDS, PRESENCE_KINDS } from "./constants.js";
/** A value that is either present or explicitly absent. */
export type Presence<T> = {
    readonly kind: typeof PRESENCE_KINDS.PRESENT;
    readonly value: T;
} | {
    readonly kind: typeof PRESENCE_KINDS.ABSENT;
};
/** A lookup that either found a value or explicitly found no value. */
export type LookupResult<T> = {
    readonly kind: typeof LOOKUP_RESULT_KINDS.FOUND;
    readonly value: T;
} | {
    readonly kind: typeof LOOKUP_RESULT_KINDS.NOT_FOUND;
};
/** A value that applies to an operation or is not meaningful for it. */
export type Applicability<T> = {
    readonly kind: typeof APPLICABILITY_KINDS.APPLICABLE;
    readonly value: T;
} | {
    readonly kind: typeof APPLICABILITY_KINDS.NOT_APPLICABLE;
};
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