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package ast
func NonNullNamedType(named string, pos *Position) *Type {
return &Type{NamedType: named, NonNull: true, Position: pos}
}
func NamedType(named string, pos *Position) *Type {
return &Type{NamedType: named, NonNull: false, Position: pos}
}
func NonNullListType(elem *Type, pos *Position) *Type {
return &Type{Elem: elem, NonNull: true, Position: pos}
}
func ListType(elem *Type, pos *Position) *Type {
return &Type{Elem: elem, NonNull: false, Position: pos}
}
type Type struct {
NamedType string
Elem *Type
NonNull bool
Position *Position `dump:"-"`
}
func (t *Type) Name() string {
if t.NamedType != "" {
return t.NamedType
}
return t.Elem.Name()
}
func (t *Type) String() string {
nn := ""
if t.NonNull {
nn = "!"
}
if t.NamedType != "" {
return t.NamedType + nn
}
return "[" + t.Elem.String() + "]" + nn
}
func (t *Type) IsCompatible(other *Type) bool {
if t.NamedType != other.NamedType {
return false
}
if t.Elem != nil && other.Elem == nil {
return false
}
if t.Elem != nil && !t.Elem.IsCompatible(other.Elem) {
return false
}
if other.NonNull {
return t.NonNull
}
return true
}
func (v *Type) Dump() string {
return v.String()
}
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