P3556 R1 Input files are source files

[wg21bot]

P3556R0 Input files are source files (Alisdair Meredith)

[wg21bot]

P3556R1 Input files are source files (Alisdair Meredith, Lori Hughes)

[tahonermann]

SG16 reviewed P3556R0 during the 2025-05-14 SG16 meeting. No polls were taken; feedback was provided to the author.

I am retaining the SG16 label and will schedule additional review pending a new revision. Adding the needs-revision tag.