Usman Akinyemi b0e65da2af rustc_parse_format: improve error for missing : before ? in format args ...

Detect the `{ident?}` pattern where `?` is immediately followed by `}` and emit
a clearer diagnostic explaining that `:` is required for Debug formatting.
This avoids falling back to a generic “invalid format string” error and adds
a targeted UI test for the case.

Signed-off-by: Usman Akinyemi <usmanakinyemi202@gmail.com>

2026-01-08 06:39:55 +05:30

..

lib.rs

rustc_parse_format: improve error for missing : before ? in format args

2026-01-08 06:39:55 +05:30

tests.rs

Add ParseMode::Diagnostic unit tests

2025-06-09 16:28:58 +02:00