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Merge pull request #2 from lemire/dlemire/make_requirements_more_explicit

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C++11. Duh.
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Daniel Lemire 2020-10-19 15:15:40 -04:00 committed by GitHub
commit 6f2586c859
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3 changed files with 8 additions and 7 deletions
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2
CMakeLists.txt
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@ -1,7 +1,7 @@
cmake_minimum_required(VERSION 3.9)
project(fast_float VERSION 0.1.0 LANGUAGES CXX)
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

2
README.md
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@ -9,7 +9,7 @@ functions for `float` and `double` types. These functions convert ASCII strings
decimal values (e.g., `1.3e10`) into binary types. We provide exact rounding (including
round to even). In our experience, these `fast_float` functions are faster than any other comparable number-parsing functions. They provide a performance similar to that of the [fast_double_parser](https://github.com/lemire/fast_double_parser) but using an novel algorithm reworked from the ground up, and while offering an API more in line with the expectations of C++ programmers.
Specifically, `fast_float` provides the following two functions with a C++17-like syntax:
Specifically, `fast_float` provides the following two functions with a C++17-like syntax (the library itself only requires C++11):
```C++
from_chars_result from_chars(const char* first, const char* last, float& value, ...);

11
include/fast_float/float_common.h
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@ -133,6 +133,12 @@ struct decimal {
uint8_t digits[max_digits];
};
constexpr static double powers_of_ten_double[] = {
1e0, 1e1, 1e2, 1e3, 1e4, 1e5, 1e6, 1e7, 1e8, 1e9, 1e10, 1e11,
1e12, 1e13, 1e14, 1e15, 1e16, 1e17, 1e18, 1e19, 1e20, 1e21, 1e22};
constexpr static float powers_of_ten_float[] = {
1e0, 1e1, 1e2, 1e3, 1e4, 1e5, 1e6, 1e7, 1e8, 1e9, 1e10};
template <typename T>
struct binary_format {
static constexpr int mantissa_explicit_bits();
@ -145,11 +151,6 @@ struct binary_format {
static constexpr int min_exponent_round_to_even();
static constexpr uint64_t max_mantissa_fast_path();
static constexpr T exact_power_of_ten(int64_t power);
constexpr static double powers_of_ten_double[] = {
1e0, 1e1, 1e2, 1e3, 1e4, 1e5, 1e6, 1e7, 1e8, 1e9, 1e10, 1e11,
1e12, 1e13, 1e14, 1e15, 1e16, 1e17, 1e18, 1e19, 1e20, 1e21, 1e22};
constexpr static float powers_of_ten_float[] = {
1e0, 1e1, 1e2, 1e3, 1e4, 1e5, 1e6, 1e7, 1e8, 1e9, 1e10};
};
template <>