import { KumoriServices } from "../../language/kumori.js";
import { Result } from "../../util/result.js";
import { AstNodeType } from "./type.js";
import { Cache2 } from "../../util/cache.js";
export interface AssignableError {
    from: AstNodeType;
    to: AstNodeType;
    cause: string;
}
export type AssignableContext = {
    cache: Cache2<AstNodeType, AstNodeType, Result<void, AssignableError[]>>;
    svcs: KumoriServices;
};
export declare function Assignable(ctx: AssignableContext, from: AstNodeType, to: AstNodeType): Result<void, AssignableError[]>;
export declare function _assignable(ctx: AssignableContext, from: AstNodeType, to: AstNodeType): Result<void, AssignableError[]>;