[libcxx-commits] [libcxx] [libc++] Optimize string operator[] for known large inputs (PR #69500)

[Louis Dionne via libcxx-commits]

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@@ -1198,11 +1198,17 @@ public:
 
   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 const_reference operator[](size_type __pos) const _NOEXCEPT {
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ldionne wrote:

Let's add a few tests with clearly-constant indices in `libcxx/test/std/strings/basic.string/string.access/index.pass.cpp`. Otherwise I think this code path might not be tested.

https://github.com/llvm/llvm-project/pull/69500