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|
-- | This module defines an abstract syntax tree for the @GraphQL@ language based on
-- <https://facebook.github.io/graphql/ Facebook's GraphQL Specification>.
--
-- Target AST for Parser.
module Language.GraphQL.AST
( Alias
, Argument(..)
, Arguments
, Definition(..)
, Directive(..)
, Directives
, Document
, Field(..)
, FragmentDefinition(..)
, FragmentName
, FragmentSpread(..)
, InlineFragment(..)
, Name
, NonNullType(..)
, ObjectField(..)
, OperationDefinition(..)
, OperationType(..)
, Selection(..)
, SelectionSet
, SelectionSetOpt
, Type(..)
, TypeCondition
, Value(..)
, VariableDefinition(..)
, VariableDefinitions
) where
import Data.Int (Int32)
import Data.List.NonEmpty (NonEmpty)
import Data.Text (Text)
import Language.GraphQL.AST.Core ( Alias
, Name
)
-- * Document
type Document = NonEmpty Definition
-- * Operations
data Definition = DefinitionOperation OperationDefinition
| DefinitionFragment FragmentDefinition
deriving (Eq,Show)
data OperationDefinition = OperationSelectionSet SelectionSet
| OperationDefinition OperationType
(Maybe Name)
VariableDefinitions
Directives
SelectionSet
deriving (Eq,Show)
data OperationType = Query | Mutation deriving (Eq,Show)
-- * SelectionSet
type SelectionSet = NonEmpty Selection
type SelectionSetOpt = [Selection]
data Selection = SelectionField Field
| SelectionFragmentSpread FragmentSpread
| SelectionInlineFragment InlineFragment
deriving (Eq,Show)
-- * Field
data Field = Field (Maybe Alias) Name Arguments Directives SelectionSetOpt
deriving (Eq,Show)
-- * Arguments
type Arguments = [Argument]
data Argument = Argument Name Value deriving (Eq,Show)
-- * Fragments
data FragmentSpread = FragmentSpread Name Directives deriving (Eq,Show)
data InlineFragment = InlineFragment (Maybe TypeCondition) Directives SelectionSet
deriving (Eq,Show)
data FragmentDefinition =
FragmentDefinition FragmentName TypeCondition Directives SelectionSet
deriving (Eq,Show)
type FragmentName = Name
type TypeCondition = Name
-- * Input values
data Value = ValueVariable Name
| ValueInt Int32
| ValueFloat Double
| ValueString Text
| ValueBoolean Bool
| ValueNull
| ValueEnum Name
| ValueList [Value]
| ValueObject [ObjectField]
deriving (Eq, Show)
data ObjectField = ObjectField Name Value deriving (Eq, Show)
-- * Variables
type VariableDefinitions = [VariableDefinition]
data VariableDefinition = VariableDefinition Name Type (Maybe Value)
deriving (Eq,Show)
-- * Input types
data Type = TypeNamed Name
| TypeList Type
| TypeNonNull NonNullType
deriving (Eq,Show)
data NonNullType = NonNullTypeNamed Name
| NonNullTypeList Type
deriving (Eq,Show)
-- * Directives
type Directives = [Directive]
data Directive = Directive Name [Argument] deriving (Eq,Show)
|
