support indicies

[MAKMED1337]

Add suppot for indicies

import math
import latexify

@latexify.with_latex
def solve(a):
	return a[0]

print(solve)

to be something like \mathrm{solve}(a) \triangleq a_0

[odashi]

I considered about some caveats by introducing this. I think there is not so large problem, except we got slices: a[x:y]. I also think we can simply raise errors when such input is given.

[MAKMED1337]

What to do with a[1][2] ?

[MAKMED1337]

What to do with a[1][2] ?

I think a_1_2 will be wrong because it's looks like a[12]
maybe a_{1,2} or a_{1\,2}

[odashi]

@MAKMED1337 Ah thanks, your suggestion seems reasonable. It requires some tricky parsing over the syntax tree though: if we found a node chain of indexing, we need to convert it to a single subscript.

Furthermore we might also want some setting to keep the bracket notation as-is: $x[a][b]$ since it is also used frequently.