Parsing, ASTs, and semantic analysis for the declaration of overloaded

operators in C++. Overloaded operators can be called directly via
their operator-function-ids, e.g., "operator+(foo, bar)", but we don't
yet implement the semantics of operator overloading to handle, e.g.,
"foo + bar".

llvm-svn: 58817

1 files changed, 37 insertions, 0 deletions

diff --git a/clang/test/SemaCXX/overloaded-operator-decl.cpp b/clang/test/SemaCXX/overloaded-operator-decl.cpp
new file mode 100644
index 00000000000..b755ebc98e6
--- /dev/null
+++ b/clang/test/SemaCXX/overloaded-operator-decl.cpp
@@ -0,0 +1,37 @@
+// RUN: clang -fsyntax-only -verify %s 
+struct X { 
+  X();
+  X(int); 
+};
+
+X operator+(X, X);
+X operator-(X, X) { X x; return x; }
+
+struct Y {
+  Y operator-() const;
+  void operator()(int x = 17) const;
+  int operator[](int);
+
+  static int operator+(Y, Y); // expected-error{{overloaded operator 'operator+' cannot be a static member function}}
+};
+
+
+void f(X x) {
+  x = operator+(x, x);
+}
+
+X operator+(int, float); // expected-error{{non-member overloaded operator 'operator+' must have at least one parameter of class or enumeration type (or reference thereof)}}
+
+X operator*(X, X = 5); // expected-error{{a parameter of an overloaded operator cannot have a default argument}}
+
+X operator/(X, X, ...); // expected-error{{overloaded operator cannot be variadic}}
+
+X operator%(Y); // expected-error{{overloaded operator 'operator%' must be a binary operator (has 1 parameter)}}
+
+void operator()(Y&, int, int); // expected-error{{overloaded operator 'operator()' must be a non-static member function}}
+
+typedef int INT;
+typedef float FLOAT;
+Y& operator++(Y&);
+Y operator++(Y&, INT);
+X operator++(X&, FLOAT); // expected-error{{second parameter of overloaded post-increment operator must have type 'int' (not 'float')}}