pub trait AstNode {
type Language: Language;
// Required methods
fn can_cast(kind: <Self::Language as Language>::Kind) -> bool
where Self: Sized;
fn cast(node: SyntaxNode<Self::Language>) -> Option<Self>
where Self: Sized;
fn syntax(&self) -> &SyntaxNode<Self::Language>;
// Provided methods
fn clone_for_update(&self) -> Self
where Self: Sized { ... }
fn clone_subtree(&self) -> Self
where Self: Sized { ... }
}Expand description
The main trait to go from untyped SyntaxNode to a typed AST. The
conversion itself has zero runtime cost: AST and syntax nodes have exactly
the same representation: a pointer to the tree root and a pointer to the
node itself.