text: import { GraphQLError } from '../../error/GraphQLError';
  
  import type { ASTVisitor } from '../../language/visitor';
  import { Kind } from '../../language/kinds';
  import { isExecutableDefinitionNode } from '../../language/predicates';
  
  import type { ASTValidationContext } from '../ValidationContext';
  
  /**
   * Executable definitions
   *
   * A GraphQL document is only valid for execution if all definitions are either
   * operation or fragment definitions.
   */
  export function ExecutableDefinitionsRule(
    context: ASTValidationContext,
  ): ASTVisitor {
    return {
      Document(node) {
        for (const definition of node.definitions) {
          if (!isExecutableDefinitionNode(definition)) {
            const defName =
              definition.kind === Kind.SCHEMA_DEFINITION ||
              definition.kind === Kind.SCHEMA_EXTENSION
                ? 'schema'
                : '"' + definition.name.value + '"';
            context.reportError(
              new GraphQLError(
                `The ${defName} definition is not executable.`,
                definition,
              ),
            );
          }
        }
        return false;
      },
    };
  }
  