whatcanGOwrong

go/pkg/mod/github.com/sourcegraph/jsonrpc2@v0.0.0-20191222043438-96c4efab7ee2/call_opt.go

@@ -0,0 +1,30 @@
+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)
+	})
+}
+
+// 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
+	})
+}