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Render matched macro arm on hover of macro calls

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This commit is contained in:
Lukas Wirth 2023-12-08 18:24:24 +01:00
parent 062e1b9b81
commit 6bfdd38c69
11 changed files with 133 additions and 65 deletions
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6
crates/mbe/src/lib.rs
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@ -251,7 +251,7 @@ impl DeclarativeMacro {
new_meta_vars: bool,
call_site: Span,
def_site_edition: Edition,
) -> ExpandResult<tt::Subtree<Span>> {
) -> ExpandResult<(tt::Subtree<Span>, Option<u32>)> {
expander::expand_rules(&self.rules, tt, marker, new_meta_vars, call_site, def_site_edition)
}
}
@ -330,6 +330,10 @@ impl<T, E> ValueResult<T, E> {
Self { value: Default::default(), err: Some(err) }
}
pub fn zip_val<U>(self, other: U) -> ValueResult<(T, U), E> {
ValueResult { value: (self.value, other), err: self.err }
}
pub fn map<U>(self, f: impl FnOnce(T) -> U) -> ValueResult<U, E> {
ValueResult { value: f(self.value), err: self.err }
}