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import { Maybe } from '../jsutils/Maybe';
import { GraphQLError } from '../error/GraphQLError';
import { DocumentNode } from '../language/ast';
import { GraphQLSchema } from '../type/schema';
import { TypeInfo } from '../utilities/TypeInfo';
import { ValidationRule, SDLValidationRule } from './ValidationContext';
/**
* Implements the "Validation" section of the spec.
*
* Validation runs synchronously, returning an array of encountered errors, or
* an empty array if no errors were encountered and the document is valid.
*
* A list of specific validation rules may be provided. If not provided, the
* default list of rules defined by the GraphQL specification will be used.
*
* Each validation rules is a function which returns a visitor
* (see the language/visitor API). Visitor methods are expected to return
* GraphQLErrors, or Arrays of GraphQLErrors when invalid.
*
* Optionally a custom TypeInfo instance may be provided. If not provided, one
* will be created from the provided schema.
*/
export function validate(
schema: GraphQLSchema,
documentAST: DocumentNode,
rules?: ReadonlyArray<ValidationRule>,
typeInfo?: TypeInfo,
options?: { maxErrors?: number },
): ReadonlyArray<GraphQLError>;
/**
* @internal
*/
export function validateSDL(
documentAST: DocumentNode,
schemaToExtend?: Maybe<GraphQLSchema>,
rules?: ReadonlyArray<SDLValidationRule>,
): Array<GraphQLError>;
/**
* Utility function which asserts a SDL document is valid by throwing an error
* if it is invalid.
*
* @internal
*/
export function assertValidSDL(documentAST: DocumentNode): void;
/**
* Utility function which asserts a SDL document is valid by throwing an error
* if it is invalid.
*
* @internal
*/
export function assertValidSDLExtension(
documentAST: DocumentNode,
schema: GraphQLSchema,
): void;
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