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-rw-r--r--src/constant.rs11
-rw-r--r--src/construct/label_end.rs4
2 files changed, 10 insertions, 5 deletions
diff --git a/src/constant.rs b/src/constant.rs
index 5cb7826..fc74316 100644
--- a/src/constant.rs
+++ b/src/constant.rs
@@ -193,10 +193,15 @@ pub const HTML_RAW_SIZE_MAX: usize = 8;
/// To safeguard performance, labels are capped at a large number: `999`.
pub const LINK_REFERENCE_SIZE_MAX: usize = 999;
-/// To do.
+/// Maximum allowed unbalanced parens in destination.
+///
+/// There can be many balanced parens, but if there are 33 opens that were not
+/// yet closed, the destination does not parse.
+/// `CommonMark` requires that at least 3 opening parens are allowed.
/// See: <https://spec.commonmark.org/0.30/#link-destination>,
-/// <https://github.com/remarkjs/react-markdown/issues/658#issuecomment-984345577>.
-pub const LINK_RESOURCE_DESTINATION_BALANCE_MAX: usize = 32;
+/// In practice, this is quite low, and several places instead cap it at 32.
+/// See: <https://github.com/remarkjs/react-markdown/issues/658#issuecomment-984345577>.
+pub const RESOURCE_DESTINATION_BALANCE_MAX: usize = 32;
/// List of protocols allowed, when operating safely, as `href` on `a`.
///
diff --git a/src/construct/label_end.rs b/src/construct/label_end.rs
index 6e8e476..a814302 100644
--- a/src/construct/label_end.rs
+++ b/src/construct/label_end.rs
@@ -1,6 +1,6 @@
//! To do
-use crate::constant::LINK_RESOURCE_DESTINATION_BALANCE_MAX;
+use crate::constant::RESOURCE_DESTINATION_BALANCE_MAX;
use crate::construct::{
partial_destination::{start as destination, Options as DestinationOptions},
partial_label::{start as label, Options as LabelOptions},
@@ -436,7 +436,7 @@ fn resource_open(tokenizer: &mut Tokenizer, code: Code) -> StateFnResult {
t,
c,
DestinationOptions {
- limit: LINK_RESOURCE_DESTINATION_BALANCE_MAX,
+ limit: RESOURCE_DESTINATION_BALANCE_MAX,
destination: TokenType::ResourceDestination,
literal: TokenType::ResourceDestinationLiteral,
marker: TokenType::ResourceDestinationLiteralMarker,