[clang-tidy] readability-container-contains literal suffixes (#74215)

Before this PR, readability-container-contains fix-its did not handle
integer literal suffixes correctly. It e.g. changed
```
  MyMap.count(2) != 0U;
```
into
```
  MyMap.contains(2)U;
```

With this PR, it correctly changes it to
```
  MyMap.contains(2);
```

1 files changed, 31 insertions, 0 deletions

diff --git a/clang-tools-extra/test/clang-tidy/checkers/readability/container-contains.cpp b/clang-tools-extra/test/clang-tidy/checkers/readability/container-contains.cpp
index 05a4ebc9..0ecb61b 100644
--- a/clang-tools-extra/test/clang-tidy/checkers/readability/container-contains.cpp
+++ b/clang-tools-extra/test/clang-tidy/checkers/readability/container-contains.cpp
@@ -175,6 +175,37 @@ int nonRewrittenCount(std::multimap<int, int> &MyMap) {
   return C1 + C2 + C3 + C4;
 }
 
+// Check different integer literal suffixes
+int testDifferentIntegerLiteralSuffixes(std::map<int, int> &MyMap) {
+
+  auto C1 = MyMap.count(2) != 0U;
+  // CHECK-MESSAGES: :[[@LINE-1]]:19: warning: use 'contains' to check for membership [readability-container-contains]
+  // CHECK-FIXES: auto C1 = MyMap.contains(2);
+  auto C2 = MyMap.count(2) != 0UL;
+  // CHECK-MESSAGES: :[[@LINE-1]]:19: warning: use 'contains' to check for membership [readability-container-contains]
+  // CHECK-FIXES: auto C2 = MyMap.contains(2);
+  auto C3 = 0U != MyMap.count(2);
+  // CHECK-MESSAGES: :[[@LINE-1]]:25: warning: use 'contains' to check for membership [readability-container-contains]
+  // CHECK-FIXES: auto C3 = MyMap.contains(2);
+  auto C4 = 0UL != MyMap.count(2);
+  // CHECK-MESSAGES: :[[@LINE-1]]:26: warning: use 'contains' to check for membership [readability-container-contains]
+  // CHECK-FIXES: auto C4 = MyMap.contains(2);
+  auto C5 = MyMap.count(2) < 1U;
+  // CHECK-MESSAGES: :[[@LINE-1]]:19: warning: use 'contains' to check for membership [readability-container-contains]
+  // CHECK-FIXES: auto C5 = !MyMap.contains(2);
+  auto C6 = MyMap.count(2) < 1UL;
+  // CHECK-MESSAGES: :[[@LINE-1]]:19: warning: use 'contains' to check for membership [readability-container-contains]
+  // CHECK-FIXES: auto C6 = !MyMap.contains(2);
+  auto C7 = 1U > MyMap.count(2);
+  // CHECK-MESSAGES: :[[@LINE-1]]:24: warning: use 'contains' to check for membership [readability-container-contains]
+  // CHECK-FIXES: auto C7 = !MyMap.contains(2);
+  auto C8 = 1UL > MyMap.count(2);
+  // CHECK-MESSAGES: :[[@LINE-1]]:25: warning: use 'contains' to check for membership [readability-container-contains]
+  // CHECK-FIXES: auto C8 = !MyMap.contains(2);
+
+  return C1 + C2 + C3 + C4 + C5 + C6 + C7 + C8;
+}
+
 // We don't want to rewrite if the `contains` call is from a macro expansion
 int testMacroExpansion(std::unordered_set<int> &MySet) {
 #define COUNT_ONES(SET) SET.count(1)