🐛 FIX: myst_role backslash-guard misparse at inline start

CHANGELOG.md

@@ -18,6 +18,8 @@
 
   **Requires markdown-it-py >= 4.1.0.**
 
+- 🐛 FIX: `myst_role` no longer mis-rejects a role at the start of inline content when the content ends with a backslash, and `\\{name}`x`` (an escaped backslash before a role) now parses the role (#62)
+
 ## 0.6.1 - 2026-05-13
 
 - 🐛 FIX: Nested field lists incorrectly nesting inside parent containers (#139)

mdit_py_plugins/myst_role/index.py

@@ -21,20 +21,15 @@ def myst_role_plugin(md: MarkdownIt) -> None:
 
 
 def myst_role(state: StateInline, silent: bool) -> bool:
+    # note ``\{`` escaping is handled by the core ``escape`` rule,
+    # which runs before this rule
+
     # check name
     match = VALID_NAME_PATTERN.match(state.src[state.pos :])
     if not match:
         return False
     name = match.group(1)
 
-    # check for starting backslash escape
-    try:
-        if state.src[state.pos - 1] == "\\":
-            # escaped (this could be improved in the case of edge case '\\{')
-            return False
-    except IndexError:
-        pass
-
     # scan opening tick length
     start = pos = state.pos + match.end()
     try:

tests/fixtures/myst_role.md

@@ -102,3 +102,24 @@ Escaped:
 .
 <p>{abc}<code>xyz</code></p>
 .
+
+Role at start with trailing backslash (#62):
+.
+{foo}`ar`\
+.
+<p><code class="myst role">{foo}[ar]</code>\</p>
+.
+
+Escaped role backslash:
+.
+\{foo}`x`
+.
+<p>{foo}<code>x</code></p>
+.
+
+Escaped double backslash before role (#62):
+.
+\\{foo}`x`
+.
+<p>\<code class="myst role">{foo}[x]</code></p>
+.