AK+Everywhere: Replace custom number parsers with fast_float

Our floating point number parser was based on the fast_float library: https://github.com/fastfloat/fast_float However, our implementation only supports 8-bit characters. To support UTF-16, we will need to be able to convert char16_t-based strings to numbers as well. This works out-of-the-box with fast_float. We can also use fast_float for integer parsing.
Author: https://github.com/trflynn89 Commit: 62d9a84b8d Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/5228 Reviewed-by: https://github.com/ADKaster ✅ Reviewed-by: https://github.com/shannonbooth
2025-07-30 04:39:06 +00:00 · 2025-06-26 19:06:46 -04:00 · 2025-06-26 19:06:46 -04:00 · 62d9a84b8d · 2025-07-03 13:53:10 +00:00
commit 62d9a84b8d
parent 9fc3e72db2
30 changed files with 413 additions and 3034 deletions
--- a/AK/StringView.h
+++ b/AK/StringView.h
@ -14,6 +14,7 @@
 #include <AK/Optional.h>
 #include <AK/Span.h>
 #include <AK/StdLibExtras.h>
+#include <AK/StringConversions.h>
 #include <AK/StringHash.h>
 #include <AK/StringUtils.h>

@ -349,12 +350,7 @@ public:
    template<Arithmetic T>
    Optional<T> to_number(TrimWhitespace trim_whitespace = TrimWhitespace::Yes) const
    {
-        if constexpr (IsFloatingPoint<T>)
-            return StringUtils::convert_to_floating_point<T>(*this, trim_whitespace);
-        if constexpr (IsSigned<T>)
-            return StringUtils::convert_to_int<T>(*this, trim_whitespace);
-        else
-            return StringUtils::convert_to_uint<T>(*this, trim_whitespace);
+        return parse_number<T>(*this, trim_whitespace);
    }

 private: