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greg 2019-11-13 18:45:24 -08:00
parent ad385d2f4f
commit 5bbbcfa676
1 changed files with 2 additions and 0 deletions
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schala-lang/language/src/ast/visitor.rs
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@ -46,6 +46,8 @@ pub enum VisitorOutput<T, E> {
Err(E) Err(E)
} }
//TODO - cf. the example about "Tree Construction Visitors", every enum type needs its own Visitor
//trait
pub trait ExpressionVisitor { pub trait ExpressionVisitor {
type Output; type Output;
fn type_anno(&mut self, _anno: &TypeIdentifier) -> Self::Output; fn type_anno(&mut self, _anno: &TypeIdentifier) -> Self::Output;