[libc-commits] [libc] [libc][NFC] Fix accessor qualifiers for `cpp::expected` (PR #80424)

[via libc-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-libc

Author: Guillaume Chatelet (gchatelet)

<details>
<summary>Changes</summary>



---
Full diff: https://github.com/llvm/llvm-project/pull/80424.diff


1 Files Affected:

- (modified) libc/src/__support/CPP/expected.h (+5-3) 


``````````diff
diff --git a/libc/src/__support/CPP/expected.h b/libc/src/__support/CPP/expected.h
index 52174a054f874..100abfc221161 100644
--- a/libc/src/__support/CPP/expected.h
+++ b/libc/src/__support/CPP/expected.h
@@ -33,10 +33,12 @@ template <class T, class E> class expected {
   constexpr expected(unexpected<E> unexp)
       : unexp(unexp.error()), is_expected(false) {}
 
-  constexpr bool has_value() { return is_expected; }
+  constexpr bool has_value() const { return is_expected; }
 
-  constexpr T value() { return exp; }
-  constexpr E error() { return unexp; }
+  constexpr T &value() { return exp; }
+  constexpr E &error() { return unexp; }
+  constexpr const T &value() const { return exp; }
+  constexpr const E &error() const { return unexp; }
 
   constexpr operator bool() { return is_expected; }
 

``````````

</details>


https://github.com/llvm/llvm-project/pull/80424