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Use an empty expander for ignored non-attribute proc-macros

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This commit is contained in:
Lukas Wirth 2022-08-03 18:10:15 +02:00
parent ec3586eab9
commit a8a6c160be
1 changed files with 22 additions and 4 deletions
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26
crates/rust-analyzer/src/reload.rs
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@ -621,7 +621,10 @@ pub(crate) fn load_proc_macro(
};
let expander: Arc<dyn ProcMacroExpander> =
if dummy_replace.iter().any(|replace| &**replace == name) {
Arc::new(DummyExpander)
match kind {
ProcMacroKind::Attr => Arc::new(IdentityExpander),
_ => Arc::new(EmptyExpander),
}
} else {
Arc::new(Expander(expander))
};
@ -647,11 +650,11 @@ pub(crate) fn load_proc_macro(
}
}
/// Dummy identity expander, used for proc-macros that are deliberately ignored by the user.
/// Dummy identity expander, used for attribute proc-macros that are deliberately ignored by the user.
#[derive(Debug)]
struct DummyExpander;
struct IdentityExpander;
impl ProcMacroExpander for DummyExpander {
impl ProcMacroExpander for IdentityExpander {
fn expand(
&self,
subtree: &tt::Subtree,
@ -661,6 +664,21 @@ pub(crate) fn load_proc_macro(
Ok(subtree.clone())
}
}
/// Empty expander, used for proc-macros that are deliberately ignored by the user.
#[derive(Debug)]
struct EmptyExpander;
impl ProcMacroExpander for EmptyExpander {
fn expand(
&self,
_: &tt::Subtree,
_: Option<&tt::Subtree>,
_: &Env,
) -> Result<tt::Subtree, ProcMacroExpansionError> {
Ok(tt::Subtree::default())
}
}
}
pub(crate) fn should_refresh_for_change(path: &AbsPath, change_kind: ChangeKind) -> bool {