import type { CallExpression, Node, Expression } from 'estree';
import type { TSESLint, TSESTree } from '@typescript-eslint/utils';
import type { SourceCode } from 'eslint';
export type AnyNode = Node | TSESTree.Node;
/**
 * Checks if a node is in a boolean context (where the result is only used as truthy/falsy).
 * e.g. if conditions, while loops, ternary tests, logical operators
 */
export declare function isInBooleanContext(node: AnyNode): boolean;
/**
 * Checks if a node is undefined, null, or void 0.
 * Returns the type of nullish value or false if not nullish.
 */
export declare function isNullish(node: Expression): 'undefined' | 'null' | false;
/**
 * Checks if a CallExpression is a copy operation that creates a shallow copy of an array.
 * e.g. concat(), slice(), slice(0)
 */
export declare function isCopyCall(node: CallExpression): boolean;
/**
 * Extracts the array node from array copy patterns.
 */
export declare function getArrayFromCopyPattern(node: TSESTree.Node): TSESTree.Node | null;
export declare function getArrayFromCopyPattern(node: Node): Node | null;
/**
 * Formats arguments from a CallExpression as a comma-separated string.
 */
export declare function formatArguments(args: TSESTree.CallExpression['arguments'], sourceCode: Readonly<TSESLint.SourceCode>): string;
export declare function formatArguments(args: CallExpression['arguments'], sourceCode: SourceCode): string;