A2-7-3: Exclude Doxygen comment groups from results

change_notes/2024-07-12-support-doxygen-comment-groups.md

@@ -0,0 +1,2 @@
+- `A2-7-3` - `UndocumentedUserDefinedType.ql`:
+  - Fixes #391. Declarations for which a Doxygen comment group provides documentation will no longer produce results.

cpp/autosar/src/rules/A2-7-3/UndocumentedUserDefinedType.ql

@@ -25,6 +25,39 @@ private predicate isInFunctionScope(Declaration d) {
   isInFunctionScope(d.getDeclaringType())
 }
 
+private string doxygenCommentGroupStrings(boolean opening) {
+  opening = true and result = ["///@{", "/**@{*/"]
+  or
+  opening = false and result = ["///@}", "/**@}*/"]
+}
+
+pragma[inline]
+private predicate isBetweenDoxygenCommentGroup(
+  Location loc, Comment opening, Comment body, Comment closing
+) {
+  // All in the same file
+  loc.getFile() = opening.getLocation().getFile() and
+  loc.getFile() = closing.getLocation().getFile() and
+  loc.getFile() = body.getLocation().getFile() and
+  // The comments are doxygen comments
+  opening.getContents().matches(doxygenCommentGroupStrings(true)) and
+  closing.getContents().matches(doxygenCommentGroupStrings(false)) and
+  // The closing comment is after the opening comment
+  opening.getLocation().getStartLine() < closing.getLocation().getStartLine() and
+  // The `body` comment directly precedes the opening comment
+  body.getLocation().getEndLine() = opening.getLocation().getStartLine() - 1 and
+  // There are no other opening/closing comment pairs between the opening and closing comments
+  not exists(Comment c |
+    c.getContents().matches(doxygenCommentGroupStrings(_)) and
+    c.getLocation().getStartLine() > opening.getLocation().getStartLine() and
+    c.getLocation().getStartLine() < closing.getLocation().getStartLine()
+  ) and
+  // `loc` is between the opening and closing comments and after the body comment
+  loc.getStartLine() > opening.getLocation().getStartLine() and
+  loc.getStartLine() < closing.getLocation().getStartLine() and
+  loc.getStartLine() > body.getLocation().getEndLine()
+}
+
 /**
  * A declaration which is required to be preceded by documentation by AUTOSAR A2-7-3.
  */
@@ -80,11 +113,13 @@ class DocumentableDeclaration extends Declaration {
 }
 
 /**
- * A `DeclarationEntry` is considered documented if it has an associated `Comment`, and the `Comment`
- * precedes the `DeclarationEntry`.
+ * A `DeclarationEntry` is considered documented if it has an associated `Comment`, the `Comment`
+ * precedes the `DeclarationEntry`, and the `Comment` is not a doxygen comment group prefix.
  */
+cached
 predicate isDocumented(DeclarationEntry de) {
   exists(Comment c | c.getCommentedElement() = de |
+    not c.getContents() = doxygenCommentGroupStrings(true) and
     exists(Location commentLoc, Location deLoc |
       commentLoc = c.getLocation() and deLoc = de.getLocation()
     |
@@ -96,6 +131,9 @@ predicate isDocumented(DeclarationEntry de) {
       commentLoc.getStartColumn() < deLoc.getStartColumn()
     )
   )
+  or
+  // The declaration entry is between a doxygen comment group
+  isBetweenDoxygenCommentGroup(de.getLocation(), _, _, _)
 }
 
 from DocumentableDeclaration d, DeclarationEntry de

cpp/autosar/test/rules/A2-7-3/UndocumentedUserDefinedType.expected

@@ -1,9 +1,11 @@
-| test.cpp:70:7:70:12 | definition of ClassD | Declaration entry for user-defined type ClassD is missing documentation. |
-| test.cpp:72:7:72:7 | definition of a | Declaration entry for member variable a is missing documentation. |
-| test.cpp:73:14:73:14 | declaration of b | Declaration entry for member variable b is missing documentation. |
-| test.cpp:74:8:74:8 | declaration of f | Declaration entry for function f is missing documentation. |
-| test.cpp:76:7:76:7 | definition of c | Declaration entry for member variable c is missing documentation. |
-| test.cpp:78:6:78:6 | declaration of d | Declaration entry for function d is missing documentation. |
-| test.cpp:81:6:81:6 | definition of e | Declaration entry for function e is missing documentation. |
-| test.cpp:88:1:88:30 | definition of message_to_string_undocumented | Declaration entry for function message_to_string_undocumented is missing documentation. |
-| test.cpp:160:21:160:24 | definition of kBar | Declaration entry for member variable kBar is missing documentation. |
+| test.cpp:74:8:74:8 | declaration of j | Declaration entry for function j is missing documentation. |
+| test.cpp:75:8:75:8 | declaration of k | Declaration entry for function k is missing documentation. |
+| test.cpp:90:7:90:12 | definition of ClassD | Declaration entry for user-defined type ClassD is missing documentation. |
+| test.cpp:92:7:92:7 | definition of a | Declaration entry for member variable a is missing documentation. |
+| test.cpp:93:14:93:14 | declaration of b | Declaration entry for member variable b is missing documentation. |
+| test.cpp:94:8:94:8 | declaration of f | Declaration entry for function f is missing documentation. |
+| test.cpp:96:7:96:7 | definition of c | Declaration entry for member variable c is missing documentation. |
+| test.cpp:98:6:98:6 | declaration of d | Declaration entry for function d is missing documentation. |
+| test.cpp:101:6:101:6 | definition of e | Declaration entry for function e is missing documentation. |
+| test.cpp:108:1:108:30 | definition of message_to_string_undocumented | Declaration entry for function message_to_string_undocumented is missing documentation. |
+| test.cpp:180:21:180:24 | definition of kBar | Declaration entry for member variable kBar is missing documentation. |

cpp/autosar/test/rules/A2-7-3/test.cpp

@@ -60,10 +60,30 @@ class ClassC { // COMPLIANT
   /// @param i an integer.
   /// @throw std::runtime_error
   void f(int i); // COMPLIANT
+
+  /** Same documentation for all members
+   * This is a multiline comment.
+   */
+  ///@{
+  void g(); // COMPLIANT
+  void h(); // COMPLIANT
+  void i(); // COMPLIANT
+  ///@}
+
+  ///@{
+  void j(); // NON_COMPLIANT
+  void k(); // NON_COMPLIANT
+  /** Member-specific documentation */
+  void l(); // COMPLIANT
+  ///@}
+
 private:
   /// @brief A Doxygen comment.
   int c; // COMPLIANT
 };
+void ClassC::i() { // not flagged, as we will only flag the non-definition
+                   // declaration
+}
 /// A Doxygen comment.
 void c(); // COMPLIANT