1 //===- unittests/ErrorOrTest.cpp - ErrorOr.h tests ------------------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9
10 #include "llvm/Support/ErrorOr.h"
11
12 #include "gtest/gtest.h"
13
14 #include <memory>
15
16 using namespace llvm;
17
18 namespace {
19
t1()20 ErrorOr<int> t1() {return 1;}
t2()21 ErrorOr<int> t2() { return errc::invalid_argument; }
22
TEST(ErrorOr,SimpleValue)23 TEST(ErrorOr, SimpleValue) {
24 ErrorOr<int> a = t1();
25 EXPECT_TRUE(a);
26 EXPECT_EQ(1, *a);
27
28 a = t2();
29 EXPECT_FALSE(a);
30 EXPECT_EQ(errc::invalid_argument, a);
31 #ifdef EXPECT_DEBUG_DEATH
32 EXPECT_DEBUG_DEATH(*a, "Cannot get value when an error exists");
33 #endif
34 }
35
36 #if LLVM_HAS_CXX11_STDLIB
t3()37 ErrorOr<std::unique_ptr<int> > t3() {
38 return std::unique_ptr<int>(new int(3));
39 }
40 #endif
41
TEST(ErrorOr,Types)42 TEST(ErrorOr, Types) {
43 int x;
44 ErrorOr<int&> a(x);
45 *a = 42;
46 EXPECT_EQ(42, x);
47
48 EXPECT_FALSE(ErrorOr<void>(errc::broken_pipe));
49 EXPECT_TRUE(ErrorOr<void>(errc::success));
50
51 #if LLVM_HAS_CXX11_STDLIB
52 // Move only types.
53 EXPECT_EQ(3, **t3());
54 #endif
55 }
56
57 struct B {};
58 struct D : B {};
59
TEST(ErrorOr,Covariant)60 TEST(ErrorOr, Covariant) {
61 ErrorOr<B*> b(ErrorOr<D*>(0));
62 b = ErrorOr<D*>(0);
63
64 #if LLVM_HAS_CXX11_STDLIB
65 ErrorOr<std::unique_ptr<B> > b1(ErrorOr<std::unique_ptr<D> >(0));
66 b1 = ErrorOr<std::unique_ptr<D> >(0);
67 #endif
68 }
69 } // end anon namespace
70
71 struct InvalidArgError {
InvalidArgErrorInvalidArgError72 InvalidArgError() {}
InvalidArgErrorInvalidArgError73 InvalidArgError(std::string S) : ArgName(S) {}
74 std::string ArgName;
75 };
76
77 namespace llvm {
78 template<>
79 struct ErrorOrUserDataTraits<InvalidArgError> : true_type {
errorllvm::ErrorOrUserDataTraits80 static error_code error() {
81 return make_error_code(errc::invalid_argument);
82 }
83 };
84 } // end namespace llvm
85
t4()86 ErrorOr<int> t4() {
87 return InvalidArgError("adena");
88 }
89
t5()90 ErrorOr<void> t5() {
91 return InvalidArgError("pie");
92 }
93
94 namespace {
TEST(ErrorOr,UserErrorData)95 TEST(ErrorOr, UserErrorData) {
96 ErrorOr<int> a = t4();
97 EXPECT_EQ(errc::invalid_argument, a);
98 EXPECT_EQ("adena", t4().getError<InvalidArgError>().ArgName);
99
100 ErrorOr<void> b = t5();
101 EXPECT_EQ(errc::invalid_argument, b);
102 EXPECT_EQ("pie", b.getError<InvalidArgError>().ArgName);
103 }
104 } // end anon namespace
105