import type { Base, Location, NoInfo, RNode } from '../model';
import type { RType } from '../type';
import type { RArgument, RUnnamedArgument } from './r-argument';
import type { EmptyArgument } from './r-function-call';
/**
 * Represents an R Indexing operation with `$`, `@`, `[[`, or `[`.
 */
interface RAccessBase<Info = NoInfo> extends Base<Info>, Location {
    readonly type: RType.Access;
    /** the accessed container/variable/expression */
    accessed: RNode<Info>;
    operator: '[' | '[[' | '$' | '@';
}
/**
 * Represents an R named access operation with `$` or `@`, the field is a string.
 */
export interface RNamedAccess<Info = NoInfo> extends RAccessBase<Info> {
    operator: '$' | '@';
    access: [RUnnamedArgument<Info>];
}
/** access can be a number, a variable or an expression that resolves to one, a filter etc. */
export interface RIndexAccess<Info = NoInfo> extends RAccessBase<Info> {
    operator: '[' | '[[';
    /** is null if the access is empty, e.g. `a[,3]` */
    access: readonly (RArgument<Info> | typeof EmptyArgument)[];
}
export type RAccess<Info = NoInfo> = RNamedAccess<Info> | RIndexAccess<Info>;
export {};