feat(render): experimental package to render arbitrary values to different formats

multi.go

@@ -0,0 +1,30 @@
+package render
+
+import (
+	"errors"
+	"io"
+)
+
+// MultiRenderer is a renderer that tries multiple renderers until one succeeds.
+type MultiRenderer struct {
+	Renderers []Renderer
+}
+
+var _ Renderer = (*MultiRenderer)(nil)
+
+// Render tries each renderer in order until one succeeds. If none succeed,
+// ErrCannotRender is returned. If a renderer returns an error that is not
+// ErrCannotRender, that error is returned.
+func (mr *MultiRenderer) Render(w io.Writer, v any) error {
+	for _, r := range mr.Renderers {
+		err := r.Render(w, v)
+		if err == nil {
+			return nil
+		}
+		if !errors.Is(err, ErrCannotRender) {
+			return err
+		}
+	}
+
+	return ErrCannotRender
+}