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Document match_ast!

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kjeremy 2019-10-30 14:38:45 -04:00
parent eee55d4663
commit 7ad55e976c
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14
crates/ra_syntax/src/lib.rs
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@ -160,6 +160,20 @@ impl SourceFile {
} }
} }
/// Matches a `SyntaxNode` against an `ast` type.
///
/// # Example:
///
/// ```ignore
/// match_ast! {
/// match node {
/// ast::CallExpr(it) => { ... },
/// ast::MethodCallExpr(it) => { ... },
/// ast::MacroCall(it) => { ... },
/// _ => None,
/// }
/// }
/// ```
#[macro_export] #[macro_export]
macro_rules! match_ast { macro_rules! match_ast {
(match $node:ident { (match $node:ident {