graphql/src/Language/GraphQL/AST/DirectiveLocation.hs
Eugen Wissner 78ee76f9d5 Define schema AST.
Large parts of the schema aren't exported publically. They will be made
public during writing the parser.

Fixes #6.
2019-12-27 09:14:12 +01:00

42 lines
1.2 KiB
Haskell

-- | Various parts of a GraphQL document can be annotated with directives.
-- This module describes locations in a document where directives can appear.
module Language.GraphQL.AST.DirectiveLocation
( DirectiveLocation(..)
, ExecutableDirectiveLocation(..)
, TypeSystemDirectiveLocation(..)
) where
-- | All directives can be splitted in two groups: directives used to annotate
-- various parts of executable definitions and the ones used in the schema
-- definition.
data DirectiveLocation
= ExecutableDirectiveLocation ExecutableDirectiveLocation
| TypeSystemDirectiveLocation TypeSystemDirectiveLocation
deriving (Eq, Show)
-- | Where directives can appear in an executable definition, like a query.
data ExecutableDirectiveLocation
= Query
| Mutation
| Subscription
| Field
| FragmentDefinition
| FragmentSpread
| InlineFragment
deriving (Eq, Show)
-- | Where directives can appear in a type system definition.
data TypeSystemDirectiveLocation
= Schema
| Scalar
| Object
| FieldDefinition
| ArgumentDefinition
| Interface
| Union
| Enum
| EnumValue
| InputObject
| InputFieldDefinition
deriving (Eq, Show)