Issue when running macro. Not evaluating Symbols properly. about pluto.jl HOT 4 CLOSED

Awesome! Thanks. This seems to be working!

from pluto.jl.

The problem here is calling eval(x) in the macro body which results in the literal value of x being put in the returned expression. Pluto only analyzes the @macroexpand @handcalc expr expression and cannot therefore see that x is referenced. Using something like Expr(:($), esc(x)) would be more Pluto friendly as the symbol contained in x would appear in the expanded expression.

from pluto.jl.

Substituting in Expr(:($), esc(x)) results in an error. I believe it is because it is returning something latexify can not evaluate since it is not a number. This is what is returns for example a.

I don't think this is being evaluated either anyway, because doing something like this causes similar issues. When I change that respective value (a), the printed terminal line goes away.

I guess what is Jupyter doing differently? I change the value of lets say a in Jupyter and then rerun the @handcalc h = (-b + sqrt(b^2 - 4*a*c))/(2*a) cell, and everything is updated and works.

I thought all Pluto did was rerun any cell that is dependent on a. I know it re-runs the cell, because the value of h changes properly as seen in the original video. It just seems strange that I get three different results when I change the a cell, then I manually re-run the handcalc cell, and then finally manually re-running the handcalc macro cell.

from pluto.jl.

It seems escapping is not needed so replacing eval(x) only with Expr(:($), x) appear to do what is expected and trigger reactivity.

I thought all Pluto did was rerun any cell that is dependent on a.

Yes, but it cannot know that the cell is dependent on a if a is not present in the expanded expression. The difference with Jupyter, is that every run will re-trigger macro expansion whereas it only happen in Pluto when the run button is explicitely clicked for that cell.

from pluto.jl.