Use LLVM_EXPLICIT instead of a function pointer as bool.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199437 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 5 insertions, 6 deletions

diff --git a/include/llvm/Support/ErrorOr.h b/include/llvm/Support/ErrorOr.h
index 543f50766e..39fec3b5ae 100644
--- a/include/llvm/Support/ErrorOr.h
+++ b/include/llvm/Support/ErrorOr.h
@@ -169,12 +169,9 @@ public:
       getStorage()->~storage_type();
   }
 
-  typedef void (*unspecified_bool_type)();
-  static void unspecified_bool_true() {}
-
   /// \brief Return false if there is an error.
-  operator unspecified_bool_type() const {
-    return HasError ? 0 : unspecified_bool_true;
+  LLVM_EXPLICIT operator bool() const {
+    return !HasError;
   }
 
   reference get() { return *getStorage(); }
diff --git a/unittests/Support/ErrorOrTest.cpp b/unittests/Support/ErrorOrTest.cpp
index 8a5b068d47..7a0c31f484 100644
--- a/unittests/Support/ErrorOrTest.cpp
+++ b/unittests/Support/ErrorOrTest.cpp
@@ -20,7 +20,9 @@ ErrorOr<int> t2() { return errc::invalid_argument; }
 
 TEST(ErrorOr, SimpleValue) {
   ErrorOr<int> a = t1();
-  EXPECT_TRUE(a);
+  // FIXME: This is probably a bug in gtest. EXPECT_TRUE should expand to
+  // include the !! to make it friendly to explicit bool operators.
+  EXPECT_TRUE(!!a);
   EXPECT_EQ(1, *a);
 
   ErrorOr<int> b = a;