gh-97740: Fix bang in Sphinx C domain ref target syntax (GH-97741)

* gh-97740: Fix bang in Sphinx C domain ref target syntax

Co-authored-by: Adam Turner <[email protected]>

* Add NEWS entry for C domain bang fix

Co-authored-by: Adam Turner <[email protected]>
(cherry picked from commit 9148c0d)

Co-authored-by: C.A.M. Gerlach <[email protected]>

Author: 2 people

Doc/conf.py

@@ -234,3 +234,28 @@
 # Relative filename of the data files
 refcount_file = 'data/refcounts.dat'
 stable_abi_file = 'data/stable_abi.dat'
+
+# Sphinx 2 and Sphinx 3 compatibility
+# -----------------------------------
+
+# bpo-40204: Allow Sphinx 2 syntax in the C domain
+c_allow_pre_v3 = True
+
+# bpo-40204: Disable warnings on Sphinx 2 syntax of the C domain since the
+# documentation is built with -W (warnings treated as errors).
+c_warn_on_allowed_pre_v3 = False
+
+# Fix '!' not working with C domain when pre_v3 is enabled
+import sphinx
+
+if sphinx.version_info[:2] < (5, 3):
+    from sphinx.domains.c import CXRefRole
+
+    original_run = CXRefRole.run
+
+    def new_run(self):
+        if self.disabled:
+            return super(CXRefRole, self).run()
+        return original_run(self)
+
+    CXRefRole.run = new_run

Misc/NEWS.d/next/Documentation/2022-10-02-10-58-52.gh-issue-97741.39l023.rst

@@ -0,0 +1,2 @@
+Fix ``!`` in c domain ref target syntax via a ``conf.py`` patch, so it works
+as intended to disable ref target resolution.