drewcassidy/quicktex
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Fix map?

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This commit is contained in:
Andrew Cassidy 2021-04-01 23:26:16 -07:00
parent 53605c983d
commit e1739b99d3
1 changed files with 9 additions and 4 deletions
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13
quicktex/util.h
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@ -23,6 +23,7 @@
#include <limits>
#include <string>
#include <type_traits>
#include <functional>
#include <vector>
#include "ndebug.h"
@ -48,7 +49,7 @@ template <typename S> constexpr auto iabs(S i) {
* @param packed Packed integer input of type I.
* @return Unpacked std::array of type O and size C.
*/
template <typename I, typename O, size_t S, size_t C> constexpr auto Unpack(I packed) noexcept(ndebug) {
template <typename I, typename O, size_t S, size_t C> constexpr std::array<O, C> Unpack(I packed) {
// type checking
static_assert(std::is_unsigned<I>::value, "Packed input type must be unsigned");
static_assert(std::is_unsigned<O>::value, "Unpacked output type must be unsigned");
@ -75,7 +76,7 @@ template <typename I, typename O, size_t S, size_t C> constexpr auto Unpack(I pa
* @param vals Unpacked std::array of type I and size C.
* @return Packed integer input of type O.
*/
template <typename I, typename O, size_t S, size_t C> constexpr auto Pack(const std::array<I, C> &vals) {
template <typename I, typename O, size_t S, size_t C> constexpr O Pack(const std::array<I, C> &vals) {
// type checking
static_assert(std::is_unsigned<I>::value, "Unpacked input type must be unsigned");
static_assert(std::is_unsigned<O>::value, "Packed output type must be unsigned");
@ -100,8 +101,12 @@ template <size_t Size, int Op(int)> constexpr std::array<uint8_t, Size> ExpandAr
return res;
}
template <typename I, typename Fn, size_t N> constexpr auto MapArray(const std::array<I, N> &input, Fn op) {
std::array<std::invoke_result_t<Fn, I>, N> output;
template <typename Seq, typename Fn> constexpr auto MapArray(const Seq &input, Fn op) {
using I = typename Seq::value_type;
using O = decltype(op(std::declval<I>()));
constexpr size_t N = std::tuple_size<Seq>::value;
std::array<O, N> output;
for (unsigned i = 0; i < N; i++) { output[i] = op(input[i]); }
return output;
}