Clear raw_fd_ostream error string on success and explain behavior in
documentation.
Add C++ header marker.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@57923 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Support/raw_ostream.cpp b/lib/Support/raw_ostream.cpp
index 008f856..f3a53a5 100644
--- a/lib/Support/raw_ostream.cpp
+++ b/lib/Support/raw_ostream.cpp
@@ -196,10 +196,13 @@
// raw_fd_ostream
//===----------------------------------------------------------------------===//
-/// raw_fd_ostream - Open the specified file for writing. If an error occurs,
-/// information about the error is put into ErrorInfo, and the stream should
-/// be immediately destroyed.
+/// raw_fd_ostream - Open the specified file for writing. If an error
+/// occurs, information about the error is put into ErrorInfo, and the
+/// stream should be immediately destroyed; the string will be empty
+/// if no error occurred.
raw_fd_ostream::raw_fd_ostream(const char *Filename, std::string &ErrorInfo) {
+ ErrorInfo.clear();
+
// Handle "-" as stdout.
if (Filename[0] == '-' && Filename[1] == 0) {
FD = STDOUT_FILENO;