TODO

Random thoughts and Todos...

tldr; see _attic/templatized_conf_idea.hh

You can convert an element of a const struct with static linkage (known at compile time) to a constexpr like this:
	const SaiConf codec_sai_conf = { .periph_num = 1, ...};
	constexpr auto pn = [=]() { return codec_sai_conf.periph_num; };
	Clocks::SAIs<pn()>::enable();

However, you can't pass the const struct to a function (including a ctor).

-Consider more peripherals with a periph_num template parameter:
e.g: SAI<1>, SAI<2>
Small benefit is we can convert RCC_Control::PERIPH to be templated:
target::RCC_Control::PERIPH<periph_num>
target::RCC_Control::SAI<2>::set()

like this:
	template<int periph_num>
	class SaiPeriph {
		SaiPeriph(const SaiConf &defs)
		: defs_(defs)
		{
			target::RCC_Control::SAI<periph_num>::set();
		}


Clocks::SAI<2>::enable() just directly calls target::RCC_Control::SAI<2>::set();
and we may not even need the Clocks wrapper anymore

But--- the conf/defs struct must be constexpr in order to say:
	SaiPeriph<project_sai_conf.periph_num> sai {project_sai_conf};

...And clang doesn't allow constexpr structs to contain a pointer (...are there workarounds??)
But gcc does (and it's a bug, so we shouldn't rely on it)
--there may be a workaround for this, so it's not a deal-breaker 

Or: we can have the periph_num outside the struct:
	constexpr unsigned project_sai_periph_num = 2;
	const SaiConfig project_sai_conf = { .sai=SAI2, .tx_block=SAI2_Block_A, ...};

Even if we had multiple SAIs in a project, it'd be like this:
	SaiPeriph<main_sai_pn> sai_main {main_sai_conf};
	SaiPeriph<aux_sai_pn> sai_aux {aux_sai_conf};


Or could we templatize the conf struct?

//sai_conf_struct:
template <unsigned periph_num>
struct SaiConf {
	static inline const unsigned PeriphNum = periph_num;
	SAI_TypeDef *SAIx;
	...
};

//project sai_conf:
const SaiConf<1> project_sai_conf = {
	.SAIx = SAI1;
};

template <typename ConfT>
struct SaiPeriph {
	SaiPeriph(const ConfT &defs)
	: defs_(defs)
	{
		target::RCC_Controls::SAI<ConfT::PeriphNum>::set();
	}

	const ConfT &defs_;
};

^^ This works, see _attic/templatized_conf_idea.hh