Re: [Bug-apl] )IN crashes

[Juergen Sauermann]

Hi David,

it is generally impossible in APL to check if a function uses a feature or not.

For example A ⎕CR B may or may not use dyadic ⎕CR (which is a GNU APL extension),
depending on whether A is a variable or a function.

And )OUT simply dumps the function's ⎕CR without further analyzing it.

/// Jürgen


On 06/15/2014 09:45 PM, David B. Lamkins wrote:

Thank you. Confirmed working.

On a related note: would it make sense to also warn about other GNU APL
extensions when writing an )OUT file? I'm thinking in particular of
lambdas and defined-function axis notation; these don't seem to cause
problems with )OUT and )IN, but neither are they standard APL notation.

On Sun, 2014-06-15 at 16:19 +0200, Juergen Sauermann wrote:

Hi David,

thanks for isolating the fault. I fixed it in SVN 327.

The fault was created by native functions being )OUT-ed and )IN-ed.
They are now handled properly, but the file created by )OUT is no longer
suitable as workspace exchange file when it contains native functions
(because native functions are a GNU APL extension that will not be 
understood
by other APL interpreters).

)OUT issues a warning for every native function being written.