tree a041afd68b22401208af7cfe00f64e051486fdef
parent ccd3babbdcef30f9d3b4cabccfcbb72dce6ef008
author Hong Shin <hongshin@google.com> 1700087621 -0800
committer Copybara-Service <copybara-worker@google.com> 1700087741 -0800

Add submsg support for strings and bytes.

msg.submsg().x() and msg.submsg().x_mut() should now be callable for strings and bytes. Main idea here was to return &[u8] for bytes (vs [u8]) and &ProtoStr instead of &str or &[u8] for strings.

This CL also expunges IsSimpleScalar.

PiperOrigin-RevId: 582809307