[clang-tools-extra] [clang-tidy] fix incorrect hint for InitListExpr in prefer-member-initializer (PR #81560)

[Julian Schmidt via cfe-commits]

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@@ -616,3 +616,26 @@ class Foo {
 #undef INVALID_HANDLE_VALUE
 #undef RGB
 }
+
+namespace GH77684 {
+struct S1 {
+// CHECK-MESSAGES: :[[@LINE+1]]:16: warning: 'M' should be initialized in a member initializer of the constructor [cppcoreguidelines-prefer-member-initializer]
+  S1() : M{} { M = 0; }
+// CHECK-FIXES:  S1() : M{0}
+  int M;
+};
+struct S2 {
+// CHECK-MESSAGES: :[[@LINE+1]]:17: warning: 'M' should be initialized in a member initializer of the constructor [cppcoreguidelines-prefer-member-initializer]
+  S2() : M{2} { M = 1; }
+// CHECK-FIXES:  S2() : M{1}
+  int M;
+};
+struct T { int a; int b; int c; };
+T v;
+struct S3 {
+// CHECK-MESSAGES: :[[@LINE+1]]:21: warning: 'M' should be initialized in a member initializer of the constructor [cppcoreguidelines-prefer-member-initializer]
+  S3() : M{1,2,3} { M = v; }
+// CHECK-FIXES:  S3() : M{v}
+  T M;
+};
+}
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5chmidti wrote:

Please add the empty body to the test.

https://github.com/llvm/llvm-project/pull/81560