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//===- unittests/ErrorOrTest.cpp - ErrorOr.h tests ------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "llvm/Support/ErrorOr.h"
#include "gtest/gtest.h"
#include <memory>
using namespace llvm;
namespace {
ErrorOr<int> t1() {return 1;}
ErrorOr<int> t2() { return errc::invalid_argument; }
TEST(ErrorOr, SimpleValue) {
ErrorOr<int> a = t1();
EXPECT_TRUE(a);
EXPECT_EQ(1, *a);
a = t2();
EXPECT_FALSE(a);
EXPECT_EQ(errc::invalid_argument, a.getError());
#ifdef EXPECT_DEBUG_DEATH
EXPECT_DEBUG_DEATH(*a, "Cannot get value when an error exists");
#endif
}
#if LLVM_HAS_CXX11_STDLIB
ErrorOr<std::unique_ptr<int> > t3() {
return std::unique_ptr<int>(new int(3));
}
#endif
TEST(ErrorOr, Types) {
int x;
ErrorOr<int&> a(x);
*a = 42;
EXPECT_EQ(42, x);
#if LLVM_HAS_CXX11_STDLIB
// Move only types.
EXPECT_EQ(3, **t3());
#endif
}
struct B {};
struct D : B {};
TEST(ErrorOr, Covariant) {
ErrorOr<B*> b(ErrorOr<D*>(0));
b = ErrorOr<D*>(0);
#if LLVM_HAS_CXX11_STDLIB
ErrorOr<std::unique_ptr<B> > b1(ErrorOr<std::unique_ptr<D> >(0));
b1 = ErrorOr<std::unique_ptr<D> >(0);
#endif
}
} // end anon namespace
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