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Starting to implement the match_fail function to walk up the matcher chain.

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This commit is contained in:
Tom Alexander 2022-11-24 16:01:52 -05:00
parent d277a033c9
commit 109a013057
Signed by: talexander
GPG Key ID: D3A179C9A53C0EDE
2 changed files with 24 additions and 1 deletions
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22
src/parser/nom_context.rs
View File

@ -48,6 +48,8 @@ pub enum ChainBehavior<'r> {
pub trait OrgModeContextTree<'r> {
fn with_additional_fail_matcher(&'r self, fail_matcher: &'r Matcher) -> OrgModeContext<'r>;
fn match_fail<'s>(&'r self, i: &'s str) -> IResult<&'s str, &'s str, VerboseError<&'s str>>;
}
impl<'r> OrgModeContextTree<'r> for OrgModeContext<'r> {
@ -59,4 +61,24 @@ impl<'r> OrgModeContextTree<'r> for OrgModeContext<'r> {
fail_matcher: ChainBehavior::AndParent(Some(fail_matcher)),
})
}
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();
while current_node.is_some() {
let current_node_unwrapped = current_node.as_ref().expect("while loop asserts current_node is some.");
match current_node_unwrapped.elem.fail_matcher {
ChainBehavior::AndParent(Some(matcher)) => {
let local_result = matcher(i);
if local_result.is_ok() {
return local_result;
}
},
ChainBehavior::AndParent(None) => {},
ChainBehavior::IgnoreParent(Some(matcher)) => todo!(),
ChainBehavior::IgnoreParent(None) => todo!(),
};
current_node = current_node.map(|current_head| current_head.next).flatten();
}
todo!()
}
}

3
src/parser/text_element_parser.rs
View File

@ -6,6 +6,7 @@ use crate::parser::parser_with_context::parser_with_context;
use crate::parser::text::paragraph_end;
use super::nom_context::OrgModeContext;
use super::nom_context::OrgModeContextTree;
use super::text::bold_end;
use super::text::bold_start;
use super::text::line_break;
@ -28,7 +29,7 @@ fn flat_text_element<'s, 'r>(
i: &'s str,
context: &'r OrgModeContext<'r>,
) -> Res<&'s str, TextElement<'s>> {
// context.not_matching_fail(i)?;
not(|i| context.match_fail(i))(i)?;
alt((
map(span, TextElement::Span),