Clippy · Correctness

Match arm case contradicting the converted scrutinee

clippy::match_str_case_mismatch

Write the match arm in the case the scrutinee was converted to, or it can never match.

Category: Correctness
Default level: warn
Tier: P1
Producer: Clippy
Diff scope: line

Not a defect when

There is effectively no such case: an arm containing characters the conversion removes can never match, so only a deliberately unreachable placeholder arm would qualify.

What it reads

Clippy, with the compiler behind it. The only pass that compiles.

Tier

Serious: worth interrupting other work for.

The tier bounds how severe a rule may be; its category bounds the tier.

Diff scope

The changed line itself.

What --scope contextual looks at to decide whether a change caused the finding.

Change it

Turn it off, or make it blocking, without touching the code it flags:

rust-doctor --rule clippy::match_str_case_mismatch=off .
rust-doctor --rule clippy::match_str_case_mismatch=error .

Set it once in rust-doctor.toml

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