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maybe working with dynamic dispatch.

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This commit is contained in:
Tom Alexander 2022-11-27 00:07:43 -05:00
parent a08fab1a8d
commit a55b7c42fd
Signed by: talexander
GPG Key ID: D3A179C9A53C0EDE
1 changed files with 22 additions and 22 deletions
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44
src/parser/new_context.rs
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@ -77,41 +77,41 @@ pub struct ContextTree<'r, T> {
head: Option<Node<'r, T>>,
}
impl<'r, T> ContextTree<'r, T> {
impl<'r, T> ContextTree<'r, T>
where
T: ContextElement,
{
pub fn new() -> Self {
ContextTree { head: None }
}
// pub fn with_additional_node<'s, F: ContextElement<'s>>(
// &'r self,
// element: F,
// ) -> ContextTree<'r, F> {
// let new_node = {
// let parent: Option<&dyn NodeType<'_>> = match &self.head {
// Some(node) => Some(node),
// None => None,
// };
// Node {
// data: element,
// parent,
// }
// };
pub fn with_additional_node<F: ContextElement>(&'r self, element: F) -> ContextTree<'r, F> {
let new_node = {
let parent: Option<&dyn NodeType<'_>> = match &self.head {
Some(node) => Some(node),
None => None,
};
Node {
data: element,
parent,
}
};
// ContextTree {
// head: Some(new_node),
// }
// }
ContextTree {
head: Some(new_node),
}
}
}
fn test_context() {
let foo = "foo";
// let context = ContextTree::new();
let context: ContextTree<'_, PreviousElementNode> = ContextTree::new();
let child1_context = PreviousElementNode { dummy: foo };
// let child1 = context.with_additional_node(child1_context);
let child1 = context.with_additional_node(child1_context);
let child2_context = FailMatcherNode {
fail_matcher: ChainBehavior::AndParent(Some(&recognize_bold_end)),
};
// let child2 = child1.with_additional_node(child2_context);
let child2 = child1.with_additional_node(child2_context);
}
fn recognize_bold_end(input: &str) -> Res<&str, &str> {