[NFC] Add some tests about two VarDecl in one DeclStmt.

Author: flovent

clang-tools-extra/test/clang-tidy/checkers/modernize/use-structured-binding.cpp

@@ -24,6 +24,14 @@ void DecomposeByAssignWarnCases() {
     // CHECK-FIXES-ALL: // REMOVE
   }
 
+  {
+    auto P = getPair<int, int>();
+    // CHECK-MESSAGES-ALL: :[[@LINE-1]]:5: warning: use structured binding to decompose a pair [modernize-use-structured-binding]
+    // CHECK-FIXES-ALL: auto [x, y] = getPair<int, int>();
+    int x = P.first, y = P.second; // REMOVE
+    // CHECK-FIXES-ALL: // REMOVE
+  }
+
   {
     auto P = getPair<int, int>();
     // CHECK-MESSAGES-ALL: :[[@LINE-1]]:5: warning: use structured binding to decompose a pair [modernize-use-structured-binding]
@@ -78,6 +86,13 @@ void forRangeWarnCases() {
     // CHECK-FIXES-ALL: // REMOVE
   }
 
+  for (auto P : Pairs) {
+    // CHECK-MESSAGES-ALL: :[[@LINE-1]]:8: warning: use structured binding to decompose a pair [modernize-use-structured-binding]
+    // CHECK-FIXES-ALL: for (auto [x, y] : Pairs) {
+    int x = P.first, y = P.second; // REMOVE
+    // CHECK-FIXES-ALL: // REMOVE
+  }
+
   for (const auto P : Pairs) {
     // CHECK-MESSAGES-ALL: :[[@LINE-1]]:8: warning: use structured binding to decompose a pair [modernize-use-structured-binding]
     // CHECK-FIXES-ALL: for (const auto [x, y] : Pairs) {
@@ -169,6 +184,12 @@ void stdTieWarnCases() {
   // CHECK-MESSAGES-ALL: :[[@LINE-1]]:3: warning: use structured binding to decompose a pair [modernize-use-structured-binding]
   // CHECK-FIXES-ALL: auto [a, b] = getPair<int, int>();
 
+  int x = 0, y = 0; // REMOVE
+  // CHECK-FIXES-ALL: // REMOVE
+  std::tie(x, y) = getPair<int, int>();
+  // CHECK-MESSAGES-ALL: :[[@LINE-1]]:3: warning: use structured binding to decompose a pair [modernize-use-structured-binding]
+  // CHECK-FIXES-ALL: auto [x, y] = getPair<int, int>();
+
   int* pa = nullptr; // REMOVE
   // CHECK-FIXES-ALL: // REMOVE
   int* pb = nullptr; // REMOVE