railt/railt

/**
 * --------------------------------------------------------------------------
 *  GraphQL SDL Schema
 * --------------------------------------------------------------------------
 *
 * A GraphQL service's collective type system capabilities are referred
 * to as that service's "schema". A schema is defined in terms of the
 * types and directives it supports as well as the root operation types for
 * each kind of operation: query, mutation, and subscription; this
 * determines the place in the type system where those operations begin.
 *
 * @see https://facebook.github.io/graphql/June2018/#sec-Schema
 */

#SchemaDefinition -> Railt\GraphQL\AST\Definition\SchemaNode
  : Description()?
    SchemaDefinitionExceptDescription()
  ;

SchemaDefinitionExceptDescription
  : SchemaDefinitionHead()
    SchemaDefinitionBody()?
  ;

SchemaDefinitionHead
  : ::T_SCHEMA:: TypeName()?
    Directive()*
  ;

SchemaDefinitionBody
  : ::T_BRACE_OPEN::
      (SchemaFieldDefinition() ::T_COMMA::?)*
    ::T_BRACE_CLOSE::
  ;