bjoernager/rust
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Tweak CheckLintNameResult::Tool.

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It has a clumsy type, with repeated `&'a [LintId]`, and sometimes
requires an empty string that isn't used in the `Err`+`None` case.

This commit splits it into two variants.
This commit is contained in:
Nicholas Nethercote 2024-05-07 14:37:57 +10:00
parent d070e89230
commit 32c8a12854
2 changed files with 46 additions and 53 deletions
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39
compiler/rustc_lint/src/context.rs
View file

@ -127,12 +127,16 @@ pub enum CheckLintNameResult<'a> {
Renamed(String),
/// The lint has been removed due to the given reason.
Removed(String),
/// The lint is from a tool. If the Option is None, then either
/// the lint does not exist in the tool or the code was not
/// compiled with the tool and therefore the lint was never
/// added to the `LintStore`. Otherwise the `LintId` will be
/// returned as if it where a rustc lint.
Tool(Result<&'a [LintId], (Option<&'a [LintId]>, String)>),
/// The lint is from a tool. The `LintId` will be returned as if it were a
/// rustc lint. The `Option<String>` indicates if the lint has been
/// renamed.
Tool(&'a [LintId], Option<String>),
/// The lint is from a tool. Either the lint does not exist in the tool or
/// the code was not compiled with the tool and therefore the lint was
/// never added to the `LintStore`.
MissingTool,
}
impl LintStore {
@ -385,14 +389,14 @@ impl LintStore {
} else {
// 2. The tool isn't currently running, so no lints will be registered.
// To avoid giving a false positive, ignore all unknown lints.
CheckLintNameResult::Tool(Err((None, String::new())))
CheckLintNameResult::MissingTool
};
}
Some(LintGroup { lint_ids, .. }) => {
return CheckLintNameResult::Tool(Ok(lint_ids));
return CheckLintNameResult::Tool(lint_ids, None);
}
},
Some(Id(id)) => return CheckLintNameResult::Tool(Ok(slice::from_ref(id))),
Some(Id(id)) => return CheckLintNameResult::Tool(slice::from_ref(id), None),
// If the lint was registered as removed or renamed by the lint tool, we don't need
// to treat tool_lints and rustc lints different and can use the code below.
_ => {}
@ -412,7 +416,7 @@ impl LintStore {
return if *silent {
CheckLintNameResult::Ok(lint_ids)
} else {
CheckLintNameResult::Tool(Err((Some(lint_ids), (*name).to_string())))
CheckLintNameResult::Tool(lint_ids, Some((*name).to_string()))
};
}
CheckLintNameResult::Ok(lint_ids)
@ -473,18 +477,17 @@ impl LintStore {
// Reaching this would be weird, but let's cover this case anyway
if let Some(LintAlias { name, silent }) = depr {
let LintGroup { lint_ids, .. } = self.lint_groups.get(name).unwrap();
return if *silent {
CheckLintNameResult::Tool(Err((Some(lint_ids), complete_name)))
if *silent {
CheckLintNameResult::Tool(lint_ids, Some(complete_name))
} else {
CheckLintNameResult::Tool(Err((Some(lint_ids), (*name).to_string())))
};
CheckLintNameResult::Tool(lint_ids, Some((*name).to_string()))
}
} else {
CheckLintNameResult::Tool(lint_ids, Some(complete_name))
}
CheckLintNameResult::Tool(Err((Some(lint_ids), complete_name)))
}
},
Some(Id(id)) => {
CheckLintNameResult::Tool(Err((Some(slice::from_ref(id)), complete_name)))
}
Some(Id(id)) => CheckLintNameResult::Tool(slice::from_ref(id), Some(complete_name)),
Some(other) => {
debug!("got renamed lint {:?}", other);
CheckLintNameResult::NoLint(None)