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cleanup casts

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This commit is contained in:
Aleksey Kladov 2019-07-19 18:22:00 +03:00
parent 8718a47088
commit 5c594bcb48
6 changed files with 975 additions and 850 deletions
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4
crates/ra_syntax/src/ast.rs
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@ -10,7 +10,7 @@ use std::marker::PhantomData;
use crate::{
syntax_node::{SyntaxNode, SyntaxNodeChildren, SyntaxToken},
SmolStr,
SmolStr, SyntaxKind,
};
pub use self::{
@ -26,6 +26,8 @@ pub use self::{
/// the same representation: a pointer to the tree root and a pointer to the
/// node itself.
pub trait AstNode: Clone {
fn can_cast(kind: SyntaxKind) -> bool;
fn cast(syntax: SyntaxNode) -> Option<Self>
where
Self: Sized;