71 lines
1.7 KiB
Rust
71 lines
1.7 KiB
Rust
// fn test_context() {
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// let foo = "foo";
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// let context = ContextTree::new();
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// let child1_context = PreviousElementNode { dummy: foo };
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// let child1 = context.with_additional_node(&child1_context);
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// let child2_context = FailMatcherNode {
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// fail_matcher: ChainBehavior::AndParent(Some(&recognize_bold_end)),
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// };
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// let child2 = child1.with_additional_node(&child2_context);
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// }
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use nom::error::VerboseError;
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use nom::IResult;
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type Matcher = dyn for<'s> Fn(&'s str) -> IResult<&'s str, &'s str, VerboseError<&'s str>>;
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type Link<'p> = Option<&'p dyn NodeType<'p>>;
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struct Node<'p, T> {
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data: T,
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parent: Link<'p>,
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}
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pub trait NodeType<'p> {
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fn get_data(&self) -> &dyn ContextElement;
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fn get_parent(&self) -> Link<'p>;
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}
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impl<'p, T> NodeType<'p> for Node<'p, T>
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where
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T: for<'s> ContextElement<'s>,
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{
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fn get_data<'s>(&'s self) -> &dyn ContextElement {
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&self.data
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}
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fn get_parent(&self) -> Link<'p> {
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self.parent
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}
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}
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pub trait ContextElement<'r> {
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fn get_fail_matcher(&self) -> ChainBehavior<'r>;
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}
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struct FailMatcherNode<'r> {
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fail_matcher: ChainBehavior<'r>,
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}
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struct PreviousElementNode<'r> {
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dummy: &'r str,
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}
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#[derive(Clone)]
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pub enum ChainBehavior<'r> {
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AndParent(Option<&'r Matcher>),
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IgnoreParent(Option<&'r Matcher>),
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}
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impl<'r> ContextElement<'r> for FailMatcherNode<'r> {
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fn get_fail_matcher(&self) -> ChainBehavior<'r> {
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// TODO: Remove this clone
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self.fail_matcher.clone()
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}
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}
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impl<'r> ContextElement<'r> for PreviousElementNode<'r> {
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fn get_fail_matcher(&self) -> ChainBehavior<'r> {
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ChainBehavior::AndParent(None)
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}
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}
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