Trying to write a macro that will cause a function to be traced

Mark_Nahabedian · May 15, 2022, 4:39pm

I have it working:

MarkNahabedian/NahaJuliaLib.jl/blob/8da451b68b1a44a05be56e121b0bd82d2c5c1992/src/trace.jl#L51


      
          
          
rewrite_for_trace(ctx::RFTKw, kw::Symbol) = kw
          
          

          
"""
              @trace(global_flag, definition)
          Cause the call arguments and return values of the function defined by
          `definition` to be logged if `global_flag` is true at run time.
          `definition` should define a method.
          """
          macro trace(global_flag, definition)
              definition = longdef(definition)
              pieces = splitdef(definition)
              result = gensym("result")
              bodyfunction = gensym("bodyfunction")
              Expr(:escape,
                   Expr(definition.head,
                        definition.args[1],   # function signature
                        Expr(:block,
                             Expr(:function,
                                  Expr(:call, bodyfunction),

Sorry about the baroque coding. I just have a better understanding of using the Expr constructor that the :() syntax.

I think the insight that got meover the line is that can appear in the head of an Expr.

It currently uses println to output the trace info. I’d like to get it to use logging instead, but when I replace the printlnwith @infoI get an error.

If I don’t get past that after some amount of head banging, I’ll open another thread.

Thanks for your help.

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Trying to write a macro that will cause a function to be traced

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