224dc34089
This is a replacement for boost::lexical_cast (but without its long dependency chain). It wraps std::from_chars(), providing a less flexible but also more concise interface.
27 lines
792 B
C++
27 lines
792 B
C++
// Copyright (C) 2025-present ScyllaDB
|
|
// SPDX-License-Identifier: LicenseRef-ScyllaDB-Source-Available-1.0
|
|
|
|
#pragma once
|
|
|
|
#include <charconv>
|
|
#include <concepts>
|
|
#include <string_view>
|
|
|
|
namespace utils {
|
|
|
|
// Parses a string into a number, throwing an exception if the entire string is not consumed
|
|
// or a conversion error happens. The exception is created by calling the provided callable.
|
|
template <typename T>
|
|
requires std::integral<T> || std::floating_point<T>
|
|
T
|
|
from_chars_exactly(std::string_view str, std::invocable<std::string_view> auto&& make_exception) {
|
|
T result;
|
|
auto [ptr, ec] = std::from_chars(str.data(), str.data() + str.size(), result);
|
|
if (ptr != str.data() + str.size() || ec != std::errc{}) {
|
|
throw make_exception(str);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
}
|