Does not compile: no declaration matches ArrayToTuple

[ulidtko]

Hi!

I've tried building this, and got a compile error (GCC 8.2.1):

[  3%] Building CXX object source/reshaper/source/private/CMakeFiles/reshaper-impl.dir/ImageView.cpp.o
In file included from Depixelization/source/reshaper/source/private/ImageView.cpp:1:
Depixelization/source/reshaper/include/private/ImageView.h:220:6: error: no declaration matches ‘auto dpa::image::internal::ImageView<Channels, BitDepth>::ArrayToTuple(const std::array<BitDepth, channel_count_v<Channels> >&) const’
 auto ImageView<Channels, BitDepth>::ArrayToTuple(const std::array<BitDepth, channel_count_v<Channels>>& array) const noexcept
      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Depixelization/source/reshaper/include/private/ImageView.h:46:10: note: candidate is: ‘template<template<class> class Channels, class BitDepth> template<class Indices> auto dpa::image::internal::ImageView<Channels, BitDepth>::ArrayToTuple(const std::array<BitDepth, channel_count_v<Channels> >&) const’
     auto ArrayToTuple(const std::array<BitDepth, channel_count_v<Channels>> & array) const noexcept;
          ^~~~~~~~~~~~
source/reshaper/include/private/ImageView.h:21:7: note: ‘class dpa::image::internal::ImageView<Channels, BitDepth>’ defined here
 class ImageView final
       ^~~~~~~~~

This error is pretty challenging to digest, even to people calling themselves C++ programmers.

If that matters: I use cmake 3.15.5. Oh, indeed, here's also an output from [relatively old] Clang 7.0.1:

In file included from Depixelization/source/reshaper/source/private/ImageView.cpp:1:
In file included from Depixelization/source/reshaper/include/private/ImageView.h:3:
Depixelization/source/reshaper/include/private/../reshaper/Pixel.h:70:22: error: template template argument has different template parameters than its
      corresponding template template parameter
struct channel_count<Y>
                     ^
Depixelization/source/reshaper/include/private/../reshaper/Pixel.h:44:1: note: too many template parameters in template template argument
template<typename BitDepth, typename = EnableIfSTBBitDepth<BitDepth>>
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Depixelization/source/reshaper/include/private/../reshaper/Pixel.h:59:10: note: previous template template parameter is here
template<template<typename> class Channels>
         ^~~~~~~~~~~~~~~~~~
Depixelization/source/reshaper/include/private/../reshaper/Pixel.h:76:22: error: template template argument has different template parameters than its
      corresponding template template parameter
struct channel_count<YA>
                     ^
Depixelization/source/reshaper/include/private/../reshaper/Pixel.h:47:1: note: too many template parameters in template template argument
template<typename BitDepth, typename = EnableIfSTBBitDepth<BitDepth>>
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Depixelization/source/reshaper/include/private/../reshaper/Pixel.h:59:10: note: previous template template parameter is here
template<template<typename> class Channels>
         ^~~~~~~~~~~~~~~~~~
Depixelization/source/reshaper/include/private/../reshaper/Pixel.h:82:22: error: template template argument has different template parameters than its
      corresponding template template parameter
struct channel_count<RGB>
                     ^
Depixelization/source/reshaper/include/private/../reshaper/Pixel.h:50:1: note: too many template parameters in template template argument
template<typename BitDepth, typename = EnableIfSTBBitDepth<BitDepth>>
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Depixelization/source/reshaper/include/private/../reshaper/Pixel.h:59:10: note: previous template template parameter is here
template<template<typename> class Channels>
         ^~~~~~~~~~~~~~~~~~
Depixelization/source/reshaper/include/private/../reshaper/Pixel.h:88:22: error: template template argument has different template parameters than its
      corresponding template template parameter
struct channel_count<YCbCr>
                     ^
Depixelization/source/reshaper/include/private/../reshaper/Pixel.h:53:1: note: too many template parameters in template template argument
template<typename BitDepth, typename = EnableIfSTBBitDepth<BitDepth>>
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Depixelization/source/reshaper/include/private/../reshaper/Pixel.h:59:10: note: previous template template parameter is here
template<template<typename> class Channels>
         ^~~~~~~~~~~~~~~~~~
Depixelization/source/reshaper/include/private/../reshaper/Pixel.h:94:22: error: template template argument has different template parameters than its
      corresponding template template parameter
struct channel_count<RGBA>
                     ^
Depixelization/source/reshaper/include/private/../reshaper/Pixel.h:56:1: note: too many template parameters in template template argument
template<typename BitDepth, typename = EnableIfSTBBitDepth<BitDepth>>
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Depixelization/source/reshaper/include/private/../reshaper/Pixel.h:59:10: note: previous template template parameter is here
template<template<typename> class Channels>
         ^~~~~~~~~~~~~~~~~~
5 errors generated.

Can you fix this?