[Support] Add a free toString function for Error
toString() consumes an Error and returns a string representation of its
contents. This commit also adds a message() method to ErrorInfoBase for
convenience.
Differential Revision: http://reviews.llvm.org/D19883
llvm-svn: 268465
diff --git a/llvm/unittests/Support/ErrorTest.cpp b/llvm/unittests/Support/ErrorTest.cpp
index f7e3b39..c2a1673 100644
--- a/llvm/unittests/Support/ErrorTest.cpp
+++ b/llvm/unittests/Support/ErrorTest.cpp
@@ -544,4 +544,23 @@
}
}
+// Test that error messages work.
+TEST(Error, ErrorMessage) {
+ EXPECT_EQ(toString(Error::success()).compare(""), 0);
+
+ Error E1 = make_error<CustomError>(0);
+ EXPECT_EQ(toString(std::move(E1)).compare("CustomError { 0}"), 0);
+
+ Error E2 = make_error<CustomError>(0);
+ handleAllErrors(std::move(E2), [](const CustomError &CE) {
+ EXPECT_EQ(CE.message().compare("CustomError { 0}"), 0);
+ });
+
+ Error E3 = joinErrors(make_error<CustomError>(0), make_error<CustomError>(1));
+ EXPECT_EQ(toString(std::move(E3))
+ .compare("CustomError { 0}\n"
+ "CustomError { 1}"),
+ 0);
+}
+
} // end anon namespace