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30 lines
520 B
Rust
30 lines
520 B
Rust
//! Ensures that #[derive(Fold)] works with generic types.
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#![feature(specialization)]
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use std::fmt::Debug;
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use swc_common::{AstNode, Fold};
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pub trait Ast: Copy + Eq + Debug {
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type CustomExpr: AstNode;
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}
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#[derive(Fold)]
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pub struct Stmt<A: Ast> {
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#[fold(bound)]
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pub expr: Expr<A>,
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}
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#[derive(Fold)]
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pub struct Expr<A: Ast> {
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#[fold(bound)]
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pub node: ExprKind<A>,
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}
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#[derive(Fold)]
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pub enum ExprKind<A: Ast> {
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Custom(#[fold(bound)] A::CustomExpr),
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/// Recursive
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Stmt(Box<Stmt<A>>),
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}
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