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package jsonrpc2
// CallOption is an option that can be provided to (*Conn).Call to
// configure custom behavior. See Meta.
type CallOption interface {
apply(r *Request) error
}
type callOptionFunc func(r *Request) error
func (c callOptionFunc) apply(r *Request) error { return c(r) }
// Meta returns a call option which attaches the given meta object to
// the JSON-RPC 2.0 request (this is a Sourcegraph extension to JSON
// RPC 2.0 for carrying metadata).
func Meta(meta interface{}) CallOption {
return callOptionFunc(func(r *Request) error {
return r.SetMeta(meta)
})
}
// ExtraField returns a call option which attaches the given name/value pair to
// the JSON-RPC 2.0 request. This can be used to add arbitrary extensions to
// JSON RPC 2.0.
func ExtraField(name string, value interface{}) CallOption {
return callOptionFunc(func(r *Request) error {
return r.SetExtraField(name, value)
})
}
// PickID returns a call option which sets the ID on a request. Care must be
// taken to ensure there are no conflicts with any previously picked ID, nor
// with the default sequence ID.
func PickID(id ID) CallOption {
return callOptionFunc(func(r *Request) error {
r.ID = id
return nil
})
}
// StringID returns a call option that instructs the request ID to be set as a
// string.
func StringID() CallOption {
return callOptionFunc(func(r *Request) error {
r.ID.IsString = true
return nil
})
}
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