ast

type Argument struct {
	Name  *Name
	Value Value
}

type BooleanValue struct {
	Value   bool
	Literal token.Position
}

type Definition interface {
	Node
}

type Directive struct {
	Name      *Name
	Arguments []*Argument
	At        token.Position
}

type Document struct {
	Definitions []Definition
}

type EnumValue struct {
	Value   string
	Literal token.Position
}

type Field struct {
	Alias        *Name
	Name         *Name
	Arguments    []*Argument
	Directives   []*Directive
	SelectionSet *SelectionSet
}

type FloatValue struct {
	Value   string
	Literal token.Position
}

type FragmentDefinition struct {
	Fragment      token.Position
	Name          *Name
	TypeCondition *NamedType
	Directives    []*Directive
	SelectionSet  *SelectionSet
}

type FragmentSpread struct {
	FragmentName *Name
	Directives   []*Directive
	Ellipsis     token.Position
}

type InlineFragment struct {
	TypeCondition *NamedType
	Directives    []*Directive
	SelectionSet  *SelectionSet
	Ellipsis      token.Position
}

type IntValue struct {
	Value   string
	Literal token.Position
}

type ListType struct {
	Type    Type
	Opening token.Position
	Closing token.Position
}

type ListValue struct {
	Values  []Value
	Opening token.Position
	Closing token.Position
}

type Name struct {
	Name         string
	NamePosition token.Position
}

type NamedType struct {
	Name *Name
}

type Node interface {
	Position() token.Position
}

type NonNullType struct {
	Type Type
}

type NullValue struct {
	Literal token.Position
}

type ObjectField struct {
	Name  *Name
	Value Value
}

type ObjectValue struct {
	Fields  []*ObjectField
	Opening token.Position
	Closing token.Position
}

type OperationDefinition struct {
	OperationType       *OperationType
	Name                *Name
	VariableDefinitions []*VariableDefinition
	Directives          []*Directive
	SelectionSet        *SelectionSet
}

type OperationType struct {
	Value         string
	ValuePosition token.Position
}

type Selection interface {
	Node
	SelectionDirectives() []*Directive
}

type SelectionSet struct {
	Selections []Selection
	Opening    token.Position
	Closing    token.Position
}

type StringValue struct {
	// Value is the actual, unquoted value.
	Value string

	Literal token.Position
}

type Type interface {
	Node
}

type Value interface {
	Node
	IsValue() bool
}

type Variable struct {
	Name   *Name
	Dollar token.Position
}

type VariableDefinition struct {
	Variable     *Variable
	Type         Type
	DefaultValue Value
}