Trait juniper::GraphQLUnion

pub trait GraphQLUnion<S: ScalarValue>: GraphQLType<S> {
    pub 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

pub 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.

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Implementors

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