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

stringer.go

@@ -0,0 +1,28 @@
+package render
+
+import (
+	"fmt"
+	"io"
+)
+
+// Stringer is a renderer that renders a value to an io.Writer using the
+// String method.
+type Stringer struct{}
+
+var _ Renderer = (*Stringer)(nil)
+
+// Render renders a value to an io.Writer using the String method. If the value
+// does not implement fmt.Stringer, ErrCannotRender is returned.
+func (s *Stringer) Render(w io.Writer, v any) error {
+	x, ok := v.(fmt.Stringer)
+	if !ok {
+		return ErrCannotRender
+	}
+
+	_, err := fmt.Fprint(w, x.String())
+	if err != nil {
+		return fmt.Errorf("%w: %w", Err, err)
+	}
+
+	return nil
+}