pub enum Type<'a> {
Named(Cow<'a, str>),
List(Box<Type<'a>>),
NonNullNamed(Cow<'a, str>),
NonNullList(Box<Type<'a>>),
}
Expand description
A type literal in the syntax tree
This enum carries no semantic information and might refer to types that do not exist.
Variants
Named(Cow<'a, str>)
A nullable named type, e.g. String
List(Box<Type<'a>>)
A nullable list type, e.g. [String]
The list itself is what’s nullable, the containing type might be non-null.
NonNullNamed(Cow<'a, str>)
A non-null named type, e.g. String!
NonNullList(Box<Type<'a>>)
A non-null list type, e.g. [String]!
.
The list itself is what’s non-null, the containing type might be null.
Implementations
Get the name of a named type.
Only applies to named types; lists will return None
.
Get the innermost name by unpacking lists
All type literals contain exactly one named type.
Determines if a type only can represent non-null values.
Trait Implementations
Auto Trait Implementations
impl<'a> RefUnwindSafe for Type<'a>
impl<'a> UnwindSafe for Type<'a>
Blanket Implementations
Mutably borrows from an owned value. Read more
Compare self to key
and return true
if they are equal.