1 files changed, 47 insertions, 0 deletions
diff --git a/clang/test/Sema/parentheses.cpp b/clang/test/Sema/parentheses.cpp
new file mode 100644
index 0000000..7674166
--- /dev/null
+++ b/clang/test/Sema/parentheses.cpp
@@ -0,0 +1,47 @@
+// RUN: %clang_cc1 -Wparentheses -fsyntax-only -verify %s
+// RUN: %clang_cc1 -Wparentheses -fixit %s -o - | %clang_cc1 -Wparentheses -Werror -
+
+bool someConditionFunc();
+
+void conditional_op(int x, int y, bool b) {
+  (void)(x + someConditionFunc() ? 1 : 2); // expected-warning {{operator '?:' has lower precedence than '+'}} \
+                                           // expected-note {{place parentheses around the '?:' expression to evaluate it first}} \
+                                           // expected-note {{place parentheses around the '+' expression to silence this warning}}
+
+  (void)(x - b ? 1 : 2); // expected-warning {{operator '?:' has lower precedence than '-'}} \
+                         // expected-note {{place parentheses around the '?:' expression to evaluate it first}} \
+                         // expected-note {{place parentheses around the '-' expression to silence this warning}}
+
+  (void)(x * (x == y) ? 1 : 2); // expected-warning {{operator '?:' has lower precedence than '*'}} \
+                                // expected-note {{place parentheses around the '?:' expression to evaluate it first}} \
+                                // expected-note {{place parentheses around the '*' expression to silence this warning}}
+}
+
+class Stream {
+public:
+  operator int();
+  Stream &operator<<(int);
+  Stream &operator<<(const char*);
+};
+
+void f(Stream& s, bool b) {
+  (void)(s << b ? "foo" : "bar"); // expected-warning {{operator '?:' has lower precedence than '<<'}} \
+                                  // expected-note {{place parentheses around the '?:' expression to evaluate it first}} \
+                                  // expected-note {{place parentheses around the '<<' expression to silence this warning}}
+}
+
+struct S {
+  operator int() { return 42; }
+  friend S operator+(const S &lhs, bool) { return S(); }
+};
+
+void test(S *s, bool (S::*m_ptr)()) {
+  (void)(*s + true ? "foo" : "bar"); // expected-warning {{operator '?:' has lower precedence than '+'}} \
+                                     // expected-note {{place parentheses around the '?:' expression to evaluate it first}} \
+                                     // expected-note {{place parentheses around the '+' expression to silence this warning}}
+
+  (void)((*s + true) ? "foo" : "bar"); // No warning.
+
+  // Don't crash on unusual member call expressions.
+  (void)((s->*m_ptr)() ? "foo" : "bar");
+}