Is there a way to get the full definition of a function as String?

LeoK987 · September 21, 2018, 7:03pm

Beside having to parse the script file.

LeoK987 · September 21, 2018, 7:32pm

It looks I can call “code_lowered” on the function and get a CodeInfo, from which I can find the statements of the function. Is that a reliable way?

jw3126 · September 21, 2018, 8:54pm

I don’t know a way to get the code of a function as String. But there are plenty of ways to do similar things:

As you mentioned the @code_... macros give you the code after some compiler processing
@which gives you a link to the source location
@less shows you the code
@edit opens the code in your favorite editor

dpsanders · September 21, 2018, 9:43pm

Rebugger.jl does this (somehow).

LeoK987 · September 21, 2018, 9:46pm

You wouldn’t recommend using CodeIndo?

dpsanders · September 21, 2018, 10:14pm

CodeInfo is the type that is returned by eg @code_llvm.

LeoK987 · September 21, 2018, 10:17pm

So, what exactly are you saying?

dpsanders · September 21, 2018, 10:59pm

Yes code_lowered is a good option, but as its same suggests it returns a lower-level representation of the function, not the source code as it is written.

dfdx · September 22, 2018, 3:14pm

Try Espresso.funexpr() or MacroTools.macro_form() which Espresso calls internally. They try to find source file of a functions first, and when it’s not available, reconstruct source from lowered code. For me it works in 85-95% of cases, failing mostly on non-trivially defined functions like the ones generated from macros.