[llvm] [Support] add move operators to raw_ostream (PR #85134)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-llvm-support

Author: Sabianin Maksim (s-mx)

<details>
<summary>Changes</summary>

Copy constructor/operator= were explicitly deleted. Hence, move constructor/operator= were left implicitly deleted. This patch declares them by default and allows the following code to be compiled.

raw_fd_ostream openStream(StringRef Path) {
    std::error_code EC;
    raw_fd_ostream OS(Path, EC);
    // handle errors here
    return std::move(OS);
}

---
Full diff: https://github.com/llvm/llvm-project/pull/85134.diff


1 Files Affected:

- (modified) llvm/include/llvm/Support/raw_ostream.h (+2) 


``````````diff
diff --git a/llvm/include/llvm/Support/raw_ostream.h b/llvm/include/llvm/Support/raw_ostream.h
index 696290a5d99cf5..de6d6f1e0b006c 100644
--- a/llvm/include/llvm/Support/raw_ostream.h
+++ b/llvm/include/llvm/Support/raw_ostream.h
@@ -143,6 +143,8 @@ class raw_ostream {
 
   raw_ostream(const raw_ostream &) = delete;
   void operator=(const raw_ostream &) = delete;
+  raw_ostream(raw_ostream &&) = default;
+  raw_ostream &operator=(raw_ostream &&) = default;
 
   virtual ~raw_ostream();
 

``````````

</details>


https://github.com/llvm/llvm-project/pull/85134