glm/gtx/hash.hpp triggers C2760 syntax error with MSVC

[Gpinchon]

When trying to use hash.hpp with glm v1.0.1 and Visual Studio Build Tools 2022 v17.14.5 I get these errors:

• glm\gtx\dual_quaternion.inl(266,16): error C2187: syntax error: 'r' was unexpected here
• glm\gtx\dual_quaternion.inl(266,3): error C2760: syntax error: '<id-expr>' was unexpected here; expected 'declaration'
• glm\gtx\dual_quaternion.inl(266,17): error C3878: syntax error: unexpected token '.' following 'simple-declaration'

It seems to be coming from mat3x4_cast which I don't use (so there really is no reason for the compiler to instantiate it)

[Gpinchon]

The only way I found to use hash.hpp is to remove the include from my header file, replace it with a hasher forward declaration and define it in a cpp using glm::detail::hash_combine, that's really not optimal and I doubt it's supposed to work like that...
The forward declartion :

namespace std {
template <typename T>
struct hash;
template <>
struct hash<glm::uvec4> {
    size_t operator()(glm::uvec4 const& a_Val) const;
};
}

The definition in the cpp file:

#include <glm/gtx/hash.hpp>

inline size_t std::hash<glm::uvec4>::operator()(glm::uvec4 const& a_Val) const
{
    size_t seed = 0;
    std::hash<uint32_t> hasher;
    glm::detail::hash_combine(seed, hasher(a_Val.x));
    glm::detail::hash_combine(seed, hasher(a_Val.y));
    glm::detail::hash_combine(seed, hasher(a_Val.z));
    glm::detail::hash_combine(seed, hasher(a_Val.w));
    return seed;
}