C1X: implement generic selections

As an extension, generic selection support has been added for all
supported languages.  The syntax is the same as for C1X.

llvm-svn: 129554

1 files changed, 26 insertions, 0 deletions

diff --git a/clang/test/Sema/generic-selection.c b/clang/test/Sema/generic-selection.c
new file mode 100644
index 00000000000..8cef975c709
--- /dev/null
+++ b/clang/test/Sema/generic-selection.c
@@ -0,0 +1,26 @@
+// RUN: %clang_cc1 -std=c1x -fsyntax-only -verify %s
+
+void foo(int n) {
+  (void) _Generic(0,
+      struct A: 0, // expected-error {{type 'struct A' in generic association incomplete}}
+      void(): 0,   // expected-error {{type 'void ()' in generic association not an object type}}
+      int[n]: 0);  // expected-error {{type 'int [n]' in generic association is a variably modified type}}
+
+  (void) _Generic(0,
+      void (*)():     0,  // expected-note {{compatible type 'void (*)()' specified here}}
+      void (*)(void): 0); // expected-error {{type 'void (*)(void)' in generic association compatible with previously specified type 'void (*)()'}}
+
+  (void) _Generic((void (*)()) 0, // expected-error {{controlling expression type 'void (*)()' compatible with 2 generic association types}}
+      void (*)(int):  0,  // expected-note {{compatible type 'void (*)(int)' specified here}}
+      void (*)(void): 0); // expected-note {{compatible type 'void (*)(void)' specified here}}
+
+  (void) _Generic(0, // expected-error {{controlling expression type 'int' not compatible with any generic association type}}
+      char: 0, short: 0, long: 0);
+
+  int a1[_Generic(0, int: 1, short: 2, float: 3, default: 4) == 1 ? 1 : -1];
+  int a2[_Generic(0, default: 1, short: 2, float: 3, int: 4) == 4 ? 1 : -1];
+  int a3[_Generic(0L, int: 1, short: 2, float: 3, default: 4) == 4 ? 1 : -1];
+  int a4[_Generic(0L, default: 1, short: 2, float: 3, int: 4) == 1 ? 1 : -1];
+  int a5[_Generic(0, int: 1, short: 2, float: 3) == 1 ? 1 : -1];
+  int a6[_Generic(0, short: 1, float: 2, int: 3) == 3 ? 1 : -1];
+}