1 files changed, 75 insertions, 0 deletions
diff --git a/clang-tools-extra/test/clang-tidy/readability-shrink-to-fit.cpp b/clang-tools-extra/test/clang-tidy/readability-shrink-to-fit.cpp
new file mode 100644
index 00000000000..039d95f1aa9
--- /dev/null
+++ b/clang-tools-extra/test/clang-tidy/readability-shrink-to-fit.cpp
@@ -0,0 +1,75 @@
+// RUN: $(dirname %s)/check_clang_tidy.sh %s readability-shrink-to-fit %t
+// REQUIRES: shell
+
+namespace std {
+template <typename T> struct vector { void swap(vector &other); };
+}
+
+void f() {
+  std::vector<int> v;
+
+  std::vector<int>(v).swap(v);
+  // CHECK-MESSAGES: :[[@LINE-1]]:3: warning: the shrink_to_fit method should be used to reduce the capacity of a shrinkable container [readability-shrink-to-fit] 
+  // CHECK-FIXES: {{^  }}v.shrink_to_fit();{{$}}
+
+  std::vector<int> &vref = v;
+  std::vector<int>(vref).swap(vref);
+  // CHECK-MESSAGES: :[[@LINE-1]]:3: warning: the shrink_to_fit method should
+  // CHECK-FIXES: {{^  }}vref.shrink_to_fit();{{$}}
+
+  std::vector<int> *vptr = &v;
+  std::vector<int>(*vptr).swap(*vptr);
+  // CHECK-MESSAGES: :[[@LINE-1]]:3: warning: the shrink_to_fit method should
+  // CHECK-FIXES: {{^  }}vptr->shrink_to_fit();{{$}}
+}
+
+struct X {
+  std::vector<int> v;
+  void f() {
+    std::vector<int>(v).swap(v);
+    // CHECK-MESSAGES: :[[@LINE-1]]:5: warning: the shrink_to_fit method should
+    // CHECK-FIXES: {{^    }}v.shrink_to_fit();{{$}}
+
+    std::vector<int> *vptr = &v;
+    std::vector<int>(*vptr).swap(*vptr);
+    // CHECK-MESSAGES: :[[@LINE-1]]:5: warning: the shrink_to_fit method should
+    // CHECK-FIXES: {{^    }}vptr->shrink_to_fit();{{$}}
+  }
+};
+
+template <typename T> void g() {
+  std::vector<int> v;
+  std::vector<int>(v).swap(v);
+  // CHECK-MESSAGES: :[[@LINE-1]]:3: warning: the shrink_to_fit method should 
+  // CHECK-FIXES: {{^  }}v.shrink_to_fit();{{$}}
+
+  std::vector<T> v2;
+  std::vector<T>(v2).swap(v2);
+  // CHECK-FIXES: {{^  }}std::vector<T>(v2).swap(v2);{{$}}
+}
+
+template <typename T> void g2() {
+  std::vector<int> v;
+  std::vector<int>(v).swap(v);
+  // CHECK-MESSAGES: :[[@LINE-1]]:3: warning: the shrink_to_fit method should 
+  // CHECK-FIXES: {{^  }}v.shrink_to_fit();{{$}}
+
+  T v3;
+  T(v3).swap(v3);
+  // CHECK-FIXES: {{^  }}T(v3).swap(v3);{{$}}
+}
+
+#define COPY_AND_SWAP_INT_VEC(x) std::vector<int>(x).swap(x)
+// CHECK-FIXES: #define COPY_AND_SWAP_INT_VEC(x) std::vector<int>(x).swap(x)
+
+void h() {
+  g<int>();
+  g<double>();
+  g<bool>();
+  g2<std::vector<int>>();
+  std::vector<int> v;
+  COPY_AND_SWAP_INT_VEC(v);
+  // CHECK-MESSAGES: :[[@LINE-1]]:3: warning: the shrink_to_fit method should 
+  // CHECK-FIXES: {{^  }}COPY_AND_SWAP_INT_VEC(v);{{$}}
+}
+