bjoernager/rust
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fix #104440

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This commit is contained in:
Takayuki Maeda 2023-01-16 21:06:34 +09:00
parent d12412c90f
commit fe96c11aba
5 changed files with 174 additions and 25 deletions
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22
compiler/rustc_resolve/src/late/diagnostics.rs
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@ -2188,15 +2188,31 @@ impl<'a: 'ast, 'ast> LateResolutionVisitor<'a, '_, 'ast> {
let deletion_span = || {
if params.len() == 1 {
// if sole lifetime, remove the entire `<>` brackets
generics_span
Some(generics_span)
} else if param_index == 0 {
// if removing within `<>` brackets, we also want to
// delete a leading or trailing comma as appropriate
param.span().to(params[param_index + 1].span().shrink_to_lo())
match (
param.span().find_ancestor_inside(generics_span),
params[param_index + 1].span().find_ancestor_inside(generics_span),
) {
(Some(param_span), Some(next_param_span)) => {
Some(param_span.to(next_param_span.shrink_to_lo()))
}
_ => None,
}
} else {
// if removing within `<>` brackets, we also want to
// delete a leading or trailing comma as appropriate
params[param_index - 1].span().shrink_to_hi().to(param.span())
match (
param.span().find_ancestor_inside(generics_span),
params[param_index - 1].span().find_ancestor_inside(generics_span),
) {
(Some(param_span), Some(prev_param_span)) => {
Some(prev_param_span.shrink_to_hi().to(param_span))
}
_ => None,
}
}
};
match use_set {