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[Support][ErrorOr] Add optimized specialization of ErrorOr<void>.

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ErrorOr<void> represents an operation that returns nothing, but can still fail.
It should be used in cases where you need the aditional user data that ErrorOr
provides over error_code.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173209 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Michael J. Spencer
2013-01-23 00:18:31 +00:00
parent 0ec35ac4fc
commit bdd4e13118
2 changed files with 109 additions and 1 deletions
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11
unittests/Support/ErrorOrTest.cpp
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@ -45,6 +45,9 @@ TEST(ErrorOr, Types) {
*a = 42;
EXPECT_EQ(42, x);
EXPECT_FALSE(ErrorOr<void>(make_error_code(errc::broken_pipe)));
EXPECT_TRUE(ErrorOr<void>(make_error_code(errc::success)));
#if LLVM_HAS_CXX11_STDLIB
// Move only types.
EXPECT_EQ(3, **t3());
@ -71,10 +74,18 @@ ErrorOr<int> t4() {
return InvalidArgError("adena");
}
ErrorOr<void> t5() {
return InvalidArgError("pie");
}
namespace {
TEST(ErrorOr, UserErrorData) {
ErrorOr<int> a = t4();
EXPECT_EQ(errc::invalid_argument, a);
EXPECT_EQ("adena", t4().getError<InvalidArgError>().ArgName);
ErrorOr<void> b = t5();
EXPECT_EQ(errc::invalid_argument, b);
EXPECT_EQ("pie", b.getError<InvalidArgError>().ArgName);
}
} // end anon namespace