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Rollup merge of #121230 - GuillaumeGomez:extend-level-api, r=Nadrieril

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Extend Level API

I need this API for https://github.com/rust-lang/rust-clippy/pull/12303: I have a nested `cfg` attribute (so a `MetaItem`) and I'd like to still be able to match against all possible kind of `Level`s.
This commit is contained in:
Matthias Krüger 2024-02-19 13:04:34 +01:00 committed by GitHub
commit ec07410f05
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1 changed files with 17 additions and 13 deletions
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30
compiler/rustc_lint_defs/src/lib.rs
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@ -227,8 +227,8 @@ pub fn as_str(self) -> &'static str {
}
/// Converts a lower-case string to a level. This will never construct the expect
/// level as that would require a [`LintExpectationId`]
pub fn from_str(x: &str) -> Option<Level> {
/// level as that would require a [`LintExpectationId`].
pub fn from_str(x: &str) -> Option<Self> {
match x {
"allow" => Some(Level::Allow),
"warn" => Some(Level::Warn),
@ -238,17 +238,21 @@ pub fn from_str(x: &str) -> Option<Level> {
}
}
/// Converts a symbol to a level.
pub fn from_attr(attr: &Attribute) -> Option<Level> {
match attr.name_or_empty() {
sym::allow => Some(Level::Allow),
sym::expect => Some(Level::Expect(LintExpectationId::Unstable {
attr_id: attr.id,
lint_index: None,
})),
sym::warn => Some(Level::Warn),
sym::deny => Some(Level::Deny),
sym::forbid => Some(Level::Forbid),
/// Converts an `Attribute` to a level.
pub fn from_attr(attr: &Attribute) -> Option<Self> {
Self::from_symbol(attr.name_or_empty(), Some(attr.id))
}
/// Converts a `Symbol` to a level.
pub fn from_symbol(s: Symbol, id: Option<AttrId>) -> Option<Self> {
match (s, id) {
(sym::allow, _) => Some(Level::Allow),
(sym::expect, Some(attr_id)) => {
Some(Level::Expect(LintExpectationId::Unstable { attr_id, lint_index: None }))
}
(sym::warn, _) => Some(Level::Warn),
(sym::deny, _) => Some(Level::Deny),
(sym::forbid, _) => Some(Level::Forbid),
_ => None,
}
}