SNEX lookup table float index access error

[ustk]

I have this array I want to write/read using a float (in real life using an interpolator), but it only wants an integer index.
I get 2 distinct errors when using a float or an interpolator.

static const int S = 128;
using Interp = index::lerp<index::normalised<float, index::wrapped<S, false>>>;
Interp intL;

span<float, S> lut;

for(int i = 0; i < lut.size(); i++)
{
	lut[0] = 0.5f; // Ok
	lut[0.0f] = 0.5f; // ERROR: LookupTableTest:Line 30(19): subscript index must be integer type
	
	intL = (float)(i / lut.size());
	lut[intL] = 0.5f; // ERROR: LookupTableTest:Line 30(24): Can't assign to target
}

I assume the second error is not an index issue but a writing one, so in the end my interpolator seems to work if I am not mistaken...

Also @Christoph-Hart, the doc here doesn't seem complete or up to date, and there're quite some errors and typos all along.
For instance, index::safe does not exist in the snex_jit_IndexLibrary

[ustk]

@Christoph-Hart Ok so the access from a normalised index works

using NormIdx = index::normalised<float, index::wrapped<S, false>>;
NormIdx normIdx;

// later...
normIdx = (float)(i / lut.size());
lut[normIdx] = 0.5f;

But I soon as an interpolator is added it doesn't compile

[ustk]

@Christoph-Hart Oh I am so dumb! Of course I cannot set an array value with an interpolated index! It's only a read index... I just got confused between read and write access