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Switch export snippet to use exit matchers.

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This commit is contained in:
Tom Alexander 2023-08-14 13:13:32 -04:00
parent 422804d846
commit eb379af78d
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GPG Key ID: D3A179C9A53C0EDE
1 changed files with 18 additions and 11 deletions
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29
src/parser/export_snippet.rs
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@ -1,8 +1,6 @@
use nom::branch::alt;
use nom::bytes::complete::tag;
use nom::character::complete::anychar;
use nom::combinator::opt;
use nom::combinator::peek;
use nom::combinator::recognize;
use nom::combinator::verify;
use nom::multi::many1;
@ -11,6 +9,9 @@ use nom::sequence::tuple;
use super::Context;
use crate::error::Res;
use crate::parser::exiting::ExitClass;
use crate::parser::parser_context::ContextElement;
use crate::parser::parser_context::ExitMatcherNode;
use crate::parser::parser_with_context::parser_with_context;
use crate::parser::util::exit_matcher_parser;
use crate::parser::util::get_consumed;
@ -23,8 +24,15 @@ pub fn export_snippet<'r, 's>(
) -> Res<&'s str, ExportSnippet<'s>> {
let (remaining, _) = tag("@@")(input)?;
let (remaining, backend_name) = backend(context, remaining)?;
let (remaining, backend_contents) =
opt(tuple((tag(":"), parser_with_context!(contents)(context))))(remaining)?;
let parser_context =
context.with_additional_node(ContextElement::ExitMatcherNode(ExitMatcherNode {
class: ExitClass::Beta,
exit_matcher: &export_snippet_end,
}));
let (remaining, backend_contents) = opt(tuple((
tag(":"),
parser_with_context!(contents)(&parser_context),
)))(remaining)?;
let (remaining, _) = tag("@@")(remaining)?;
let source = get_consumed(input, remaining);
Ok((
@ -48,14 +56,13 @@ fn backend<'r, 's>(context: Context<'r, 's>, input: &'s str) -> Res<&'s str, &'s
#[cfg_attr(feature = "tracing", tracing::instrument(ret, level = "debug"))]
fn contents<'r, 's>(context: Context<'r, 's>, input: &'s str) -> Res<&'s str, &'s str> {
let (remaining, source) = recognize(verify(
many_till(
anychar,
peek(alt((
parser_with_context!(exit_matcher_parser)(context),
tag("@@"),
))),
),
many_till(anychar, parser_with_context!(exit_matcher_parser)(context)),
|(children, _exit_contents)| !children.is_empty(),
))(input)?;
Ok((remaining, source))
}
#[cfg_attr(feature = "tracing", tracing::instrument(ret, level = "debug"))]
fn export_snippet_end<'r, 's>(context: Context<'r, 's>, input: &'s str) -> Res<&'s str, &'s str> {
tag("@@")(input)
}