[libc] [llvm] [libc][NFC] Use user defined literals to build 128 and 256 bit constants. (PR #81746)

[Guillaume Chatelet via llvm-commits]

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@@ -76,7 +76,7 @@ template <typename T, int base> struct DigitBuffer {
   // Returns the digit for a particular character.
   // Returns 255 if the character is invalid.
   LIBC_INLINE static constexpr uint8_t get_digit_value(const char c) {
-    const auto to_lower = [](char c) { return c | 32; };
+    const auto to_lower = [](char c) -> uint8_t { return c | 32; };
     const auto is_digit = [](char c) { return c >= '0' && c <= '9'; };
     const auto is_alpha = [](char c) {
       return ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z');
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gchatelet wrote:

Yes just noticed, I'll revert, I don't have time to fix it now.

https://github.com/llvm/llvm-project/pull/81746