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constexpr-to-string
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make digits inline; simplify digit_count

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master
Clyne 4 years ago committed by GitHub
parent efe33d79d5
commit 3234772a90
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1 changed files with 2 additions and 3 deletions
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5
to_string.hpp
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@ -11,8 +11,7 @@
namespace constexpr_to_string { namespace constexpr_to_string {
constexpr char digits[] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"; inline constexpr char digits[] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
constexpr auto digit_count = sizeof(digits) / sizeof(digits[0]);
/** /**
* @struct to_string_t * @struct to_string_t
@ -22,7 +21,7 @@ constexpr auto digit_count = sizeof(digits) / sizeof(digits[0]);
*/ */
template<auto N, int base, typename char_type, template<auto N, int base, typename char_type,
std::enable_if_t<std::is_integral_v<decltype(N)>, int> = 0, std::enable_if_t<std::is_integral_v<decltype(N)>, int> = 0,
std::enable_if_t<(base > 1 && base < digit_count), int> = 0> std::enable_if_t<(base > 1 && base < sizeof(digits)), int> = 0>
class to_string_t { class to_string_t {
// The lambda calculates what the string length of N will be, so that `buf` // The lambda calculates what the string length of N will be, so that `buf`
// fits to the number perfectly. // fits to the number perfectly.

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