eslint-plugin-de-morgan/dist/utils/has-operator.d.ts

ESLint plugin for transforming negated boolean expressions via De Morgan’s laws

import {
  LogicalExpression,
  LogicalOperator,
  UnaryExpression,
  UnaryOperator,
} from 'estree'
/**
 * Creates a predicate function that checks if an AST node has a specific
 * operator.
 *
 * @example
 *
 * ```ts
 * const isAnd = hasOperator('&&')
 * isAnd({ type: 'LogicalExpression', operator: '&&' }) // returns true
 * ```
 *
 * @example
 *
 * ```ts
 * const isNot = hasOperator('!')
 * isNot({ type: 'UnaryExpression', operator: '!' }) // returns true
 * ```
 *
 * @param operator - The operator to check for. For LogicalOperator: `&&`, `||`,
 *   `??` For UnaryOperator: `-`, `+`, `!`, `~`, `typeof`, etc.
 * @returns A predicate function that:
 *
 *   - Takes a LogicalExpression or UnaryExpression node
 *   - Returns `true` if the node's operator matches the specified operator
 *   - Returns `false` otherwise.
 */
export declare function hasOperator(
  operator: LogicalOperator | UnaryOperator,
): (node: LogicalExpression | UnaryExpression) => boolean