0061a2232d
Detect Python-style f-string debug syntax in format strings and emit a
clear diagnostic explaining that it is not supported in Rust. When the
intended operation can be inferred, suggest the corresponding Rust
alternative e.g from `println!("{=}", x)` to `dbg!({x})`.
Signed-off-by: Usman Akinyemi <usmanakinyemi202@gmail.com>
17 lines
496 B
Text
17 lines
496 B
Text
error: invalid format string: python's f-string debug `=` is not supported in rust, use `dbg(x)` instead
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--> $DIR/format-string-error-3.rs:4:16
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LL | println!("{=}", x);
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| -^ expected `}` in format string
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| because of this opening brace
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= note: to print `{`, you can escape it using `{{`
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help: use rust debug printing macro
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LL - println!("{=}", x);
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LL + dbg!(x);
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error: aborting due to 1 previous error
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