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Start of working on enum.

This commit is contained in:
Tom Alexander 2022-11-26 22:54:54 -05:00
parent f4473cbf01
commit 2bb6f50cba
Signed by: talexander
GPG Key ID: D3A179C9A53C0EDE
1 changed files with 25 additions and 7 deletions
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32
src/parser/nom_context.rs
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@ -42,7 +42,12 @@ impl<'r, T> ContextTree<'r, T> {
} }
} }
pub struct ContextElement<'r> { pub enum ContextElement<'r> {
FailMatcherNode(FailMatcherNode<'r>),
PreviousElementNode(PreviousElementNode<'r>),
}
pub struct FailMatcherNode<'r> {
pub fail_matcher: ChainBehavior<'r>, pub fail_matcher: ChainBehavior<'r>,
} }
@ -50,6 +55,7 @@ pub struct PreviousElementNode<'r> {
pub dummy: &'r str, pub dummy: &'r str,
} }
#[derive(Clone)]
pub enum ChainBehavior<'r> { pub enum ChainBehavior<'r> {
AndParent(Option<&'r Matcher>), AndParent(Option<&'r Matcher>),
IgnoreParent(Option<&'r Matcher>), IgnoreParent(Option<&'r Matcher>),
@ -66,9 +72,9 @@ impl<'r> OrgModeContextTree<'r> for OrgModeContextNode<'r> {
&'r self, &'r self,
fail_matcher: &'r Matcher, fail_matcher: &'r Matcher,
) -> ContextTree<'r, ContextElement<'r>> { ) -> ContextTree<'r, ContextElement<'r>> {
self.with_additional_node(ContextElement { self.with_additional_node(ContextElement::FailMatcherNode(FailMatcherNode {
fail_matcher: ChainBehavior::AndParent(Some(fail_matcher)), fail_matcher: ChainBehavior::AndParent(Some(fail_matcher)),
}) }))
} }
// fn with_previous_element(&'r self, dummy: &'r str) -> ContextTree<'r, PreviousElementNode<'r>> { // fn with_previous_element(&'r self, dummy: &'r str) -> ContextTree<'r, PreviousElementNode<'r>> {
@ -80,10 +86,9 @@ impl<'r> OrgModeContextTree<'r> for OrgModeContextNode<'r> {
fn match_fail<'s>(&'r self, i: &'s str) -> IResult<&'s str, &'s str, VerboseError<&'s str>> { fn match_fail<'s>(&'r self, i: &'s str) -> IResult<&'s str, &'s str, VerboseError<&'s str>> {
let mut current_node = self.head.as_ref(); let mut current_node = self.head.as_ref();
while current_node.is_some() { while current_node.is_some() {
let current_node_unwrapped = current_node let current_node_unwrapped =
.as_ref() current_node.expect("while loop asserts current_node is some.");
.expect("while loop asserts current_node is some."); match current_node_unwrapped.elem.get_fail_matcher() {
match current_node_unwrapped.elem.fail_matcher {
ChainBehavior::AndParent(Some(matcher)) => { ChainBehavior::AndParent(Some(matcher)) => {
let local_result = matcher(i); let local_result = matcher(i);
if local_result.is_ok() { if local_result.is_ok() {
@ -117,3 +122,16 @@ impl<'r, T> std::fmt::Debug for ContextTree<'r, T> {
write!(f, "ContextTree") write!(f, "ContextTree")
} }
} }
impl<'r> ContextElement<'r> {
pub fn get_fail_matcher(&self) -> ChainBehavior<'r> {
match self {
ContextElement::FailMatcherNode(fail_matcher_node) => {
fail_matcher_node.fail_matcher.clone()
}
ContextElement::PreviousElementNode(previous_element_node) => {
ChainBehavior::AndParent(None)
}
}
}
}