Trait GraphQLUnion

pub trait GraphQLUnion<S: ScalarValue>: GraphQLType<S> {
    // Provided method
    fn mark() { ... }
}

Maker trait for GraphQL unions.

This trait extends the GraphQLType and is only used to mark an union. During compile this addition information is required to prevent unwanted structure compiling. If an object requires this trait instead of the GraphQLType, then it explicitly requires GraphQL unions. Other types (scalars, enums, objects, input objects and interfaces) are not allowed.

Provided Methods

fn mark()

An arbitrary function without meaning.

May contain compile timed check logic which ensures that types are used correctly according to the GraphQL specification.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl<S, T> GraphQLUnion<S> for &T

where T: GraphQLUnion<S> + ?Sized, S: ScalarValue,

fn mark()

impl<S, T> GraphQLUnion<S> for Box<T>

where T: GraphQLUnion<S> + ?Sized, S: ScalarValue,

fn mark()

impl<S, T> GraphQLUnion<S> for Arc<T>

where T: GraphQLUnion<S> + ?Sized, S: ScalarValue,

fn mark()

Implementors