Re: [Bug-apl] Error declaring nihilic operator with index

[Juergen Sauermann]

Hi Elias,

you cannot define a niladic function with axis because you could not call it.
There is no reduction pattern defined for that - not in ISO and not in IBM APL2.
N[X] computes N and then indexes it with X and does not call N with axis X.

The other problem was a missing check for valid function headers - { ⍶ χ }
would be a niladic operator (which also does not exist). SVN 396 now issues
a syntax error when you try to define it.

/// Jürgen


On 07/25/2014 07:47 AM, Elias Mårtenson wrote:

I'm getting an error declaring a nihilic operator that has an index parameter using ⎕FX:

      ⎕FX 'Z←(OP F)[V]' "OP V"

1

When I declare it using the lambda format, the declaration works but trying to call it gives an error. Trying to call it without the index parameter (but with a normal parameter) causes a crash:

      FF ← { ⍶ χ }

      -FF[10]

SYNTAX ERROR

     -FF 10

====================================================

SEGMENTATION FAULT

----------------------------------------

-- Stack trace at main.cc:140

----------------------------------------

0xa @@@@

0xa  @@@@

0xa   @@@@

0xa    @@@@

0xa     @@@@

0xa      @@@@

0xa       @@@@

0xa        @@@@

0xa         @@@@

0xa          @@@@

0x0           @@@@

0x0            @@@@

0xa             @@@@

========================================

====================================================

Regards,

Elias