graphql/validation/rules/PossibleFragmentSpreads.d.ts

A Query Language and Runtime which can target any service.

import { ASTVisitor } from '../../language/visitor';
import { ValidationContext } from '../ValidationContext';

export function typeIncompatibleSpreadMessage(
  fragName: string,
  parentType: string,
  fragType: string,
): string;

export function typeIncompatibleAnonSpreadMessage(
  parentType: string,
  fragType: string,
): string;

/**
 * Possible fragment spread
 *
 * A fragment spread is only valid if the type condition could ever possibly
 * be true: if there is a non-empty intersection of the possible parent types,
 * and possible types which pass the type condition.
 */
export function PossibleFragmentSpreads(context: ValidationContext): ASTVisitor;