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match_ast! takes a pattern to allow underscore usage

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This commit is contained in:
Lukas Wirth 2021-12-14 12:44:31 +01:00
parent 9915103c9e
commit 901c7c7277
6 changed files with 35 additions and 35 deletions
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2
crates/syntax/src/lib.rs
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@ -242,7 +242,7 @@ macro_rules! match_ast {
(match $node:ident { $($tt:tt)* }) => { match_ast!(match ($node) { $($tt)* }) };
(match ($node:expr) {
$( ast::$ast:ident($it:ident) => $res:expr, )*
$( ast::$ast:ident($it:pat) => $res:expr, )*
_ => $catch_all:expr $(,)?
}) => {{
$( if let Some($it) = ast::$ast::cast($node.clone()) { $res } else )*