Do not lint ignored private doc tests

src/librustdoc/passes/doc_test_lints.rs

@@ -8,7 +8,7 @@ use crate::clean;
 use crate::clean::*;
 use crate::core::DocContext;
 use crate::fold::DocFolder;
-use crate::html::markdown::{find_testable_code, ErrorCodes, LangString};
+use crate::html::markdown::{find_testable_code, ErrorCodes, Ignore, LangString};
 use rustc_session::lint;
 
 pub const CHECK_PRIVATE_ITEMS_DOC_TESTS: Pass = Pass {
@@ -48,15 +48,11 @@ pub(crate) struct Tests {
     pub(crate) found_tests: usize,
 }
 
-impl Tests {
-    pub(crate) fn new() -> Tests {
-        Tests { found_tests: 0 }
-    }
-}
-
 impl crate::doctest::Tester for Tests {
-    fn add_test(&mut self, _: String, _: LangString, _: usize) {
-        self.found_tests += 1;
+    fn add_test(&mut self, _: String, config: LangString, _: usize) {
+        if config.rust && config.ignore == Ignore::None {
+            self.found_tests += 1;
+        }
     }
 }
 
@@ -85,7 +81,7 @@ pub fn look_for_tests<'tcx>(cx: &DocContext<'tcx>, dox: &str, item: &Item) {
         }
     };
 
-    let mut tests = Tests::new();
+    let mut tests = Tests { found_tests: 0 };
 
     find_testable_code(&dox, &mut tests, ErrorCodes::No, false, None);
 

src/test/rustdoc-ui/coverage/doc-examples.stdout

@@ -1,7 +1,7 @@
 +-------------------------------------+------------+------------+------------+------------+
 | File                                | Documented | Percentage |   Examples | Percentage |
 +-------------------------------------+------------+------------+------------+------------+
-| ...tdoc-ui/coverage/doc-examples.rs |          4 |     100.0% |          2 |      50.0% |
+| ...tdoc-ui/coverage/doc-examples.rs |          4 |     100.0% |          1 |      25.0% |
 +-------------------------------------+------------+------------+------------+------------+
-| Total                               |          4 |     100.0% |          2 |      50.0% |
+| Total                               |          4 |     100.0% |          1 |      25.0% |
 +-------------------------------------+------------+------------+------------+------------+

src/test/rustdoc-ui/private-doc-test.rs

@@ -0,0 +1,12 @@
+// check-pass
+
+#![deny(private_doc_tests)]
+
+mod foo {
+    /// private doc test
+    ///
+    /// ```ignore (used for testing ignored doc tests)
+    /// assert!(false);
+    /// ```
+    fn bar() {}
+}