[clang-tools-extra] [clang-tidy] Replace /* ... */ single-line comments with // ... comments (PR #124319)

[via cfe-commits]

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@@ -0,0 +1,68 @@
+// RUN: %check_clang_tidy -std=c++11 %s modernize-use-cpp-style-comments %t -- --
+
+// Single-line full C-style comment
+static const int CONSTANT = 42; /* Important constant value */
+// CHECK-MESSAGES: :[[@LINE-1]]:33: warning: use C++ style comments '//' instead of C style comments '/*...*/' [modernize-use-cpp-style-comments]
+// CHECK-FIXES: static const int CONSTANT = 42; // Important constant value
+
+// Inline comment that should NOT be transformed
+int a = /* inline comment */ 5;
+
+// Multiline full-line comment
+/* This is a multiline comment
+   that spans several lines
+   and should be converted to C++ style */
+// CHECK-MESSAGES: :[[@LINE-3]]:1: warning: use C++ style comments '//' instead of C style comments '/*...*/' [modernize-use-cpp-style-comments]
+// CHECK-FIXES: // This is a multiline comment
+// CHECK-FIXES: // that spans several lines
+// CHECK-FIXES: // and should be converted to C++ style
+void fnWithSomeBools(bool A,bool B) {}
+// Function with parameter inline comments
+void processData(int data /* input data */, 
+                 bool validate /* perform validation */) {
+    // These inline comments should NOT be transformed
+    fnWithSomeBools(/*ControlsA=*/ true, /*ControlsB=*/ false);
+}
+
+// Multiline comment with asterisk styling
+/*******************************
+ * Block comment with asterisks
+ * Should be converted to C++ style
+ *******************************/
+// CHECK-MESSAGES: :[[@LINE-4]]:1: warning: use C++ style comments '//' instead of C style comments '/*...*/' [modernize-use-cpp-style-comments]
+// CHECK-FIXES: // ******************************
+// CHECK-FIXES: // * Block comment with asterisks
+// CHECK-FIXES: // * Should be converted to C++ style
+// CHECK-FIXES: // ******************************
+int calculateSomething() { return 1;}
+// Comment at end of complex line
+int complexCalculation = calculateSomething(); /* Result of complex calculation */
+// CHECK-MESSAGES: :[[@LINE-1]]:48: warning: use C++ style comments '//' instead of C style comments '/*...*/' [modernize-use-cpp-style-comments]
+// CHECK-FIXES: int complexCalculation = calculateSomething(); // Result of complex calculation
+
+// Nested comments and edge cases
+void edgeCaseFunction() {
+    int x = 10 /* First value */ + 20 /* Second value */;  // Inline comments should not transform
+    
+    /* Comment with special characters !@#$%^&*()_+ */
+    // CHECK-MESSAGES: :[[@LINE-1]]:5: warning: use C++ style comments '//' instead of C style comments '/*...*/' [modernize-use-cpp-style-comments]
+    // CHECK-FIXES: // Comment with special characters !@#$%^&*()_+
+}
+
+// Multiline comment with various indentations
+    /* This comment is indented
+       and should preserve indentation when converted */
+// CHECK-MESSAGES: :[[@LINE-2]]:5: warning: use C++ style comments '//' instead of C style comments '/*...*/' [modernize-use-cpp-style-comments]
+// CHECK-FIXES:     // This comment is indented
+// CHECK-FIXES:     // and should preserve indentation when converted
+
+// Complex function with mixed comment types
+void complexFunction() {
+    /* Full line comment at start of block */
+    // CHECK-MESSAGES: :[[@LINE-1]]:5: warning: use C++ style comments '//' instead of C style comments '/*...*/' [modernize-use-cpp-style-comments]
+    // CHECK-FIXES: // Full line comment at start of block
+    
+    int x = 10; /* Inline comment not to be transformed */
+    // CHECK-MESSAGES: :[[@LINE-1]]:17: warning: use C++ style comments '//' instead of C style comments '/*...*/' [modernize-use-cpp-style-comments]
+    // CHECK-FIXES: int x = 10; // Inline comment not to be transformed
+}
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4m4n-x-B4w4ne wrote:

Done Thanks.

https://github.com/llvm/llvm-project/pull/124319