Files
ladybird/AK/StringConversions.h
Timothy Flynn 62d9a84b8d 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.
2025-07-03 09:51:56 -04:00

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/*
* Copyright (c) 2022, David Tuin <davidot@serenityos.org>
* Copyright (c) 2025, Tim Flynn <trflynn89@ladybird.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Concepts.h>
#include <AK/Optional.h>
#include <AK/StringUtils.h>
namespace AK {
template<typename T>
struct ParseFirstNumberResult {
T value { 0 };
size_t characters_parsed { 0 };
};
template<Arithmetic T>
Optional<ParseFirstNumberResult<T>> parse_first_number(StringView, TrimWhitespace = TrimWhitespace::Yes, int base = 10);
template<Arithmetic T>
Optional<T> parse_number(StringView, TrimWhitespace = TrimWhitespace::Yes, int base = 10);
template<Integral T>
Optional<T> parse_hexadecimal_number(StringView, TrimWhitespace = TrimWhitespace::Yes);
}