Add missing test for the "overloadable" attribute

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@64396 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Sema/overloadable.c b/test/Sema/overloadable.c
new file mode 100644 (file)
index 0000000..5118e40
--- /dev/null
+++ b/test/Sema/overloadable.c
@@ -0,0 +1,37 @@
+// RUN: clang -fsyntax-only -verify %s
+
+int var __attribute__((overloadable)); // expected-error{{'overloadable' attribute can only be applied to a function}}
+
+int *f(int) __attribute__((overloadable)); // expected-note{{previous overload of function is here}}
+float *f(float); // expected-error{{overloaded function 'f' must have the 'overloadable' attribute}}
+int *f(int); // expected-note{{previous declaration is here}}
+double *f(double) __attribute__((overloadable)); // okay, new
+
+void test_f(int iv, float fv, double dv) {
+  int *ip = f(iv);
+  float *fp = f(fv);
+  double *dp = f(dv);
+}
+
+int *accept_funcptr(int (*)()) __attribute__((overloadable)); //         \
+  // expected-note{{candidate function}}
+float *accept_funcptr(int (*)(int, double)) __attribute__((overloadable)); //  \
+  // expected-note{{candidate function}}
+
+void test_funcptr(int (*f1)(int, double),
+                  int (*f2)(int, float)) {
+  float *fp = accept_funcptr(f1);
+  accept_funcptr(f2); // expected-error{{no matching function for call to 'accept_funcptr'; candidates are:}}
+}
+
+struct X { int x; float y; };
+struct Y { int x; float y; };
+int* accept_struct(struct X x) __attribute__((overloadable));
+float* accept_struct(struct Y y) __attribute__((overloadable));
+
+void test_struct(struct X x, struct Y y) {
+  int *ip = accept_struct(x);
+  float *fp = accept_struct(y);
+}
+
+double *f(int) __attribute__((overloadable)); // expected-error{{conflicting types for 'f'}}