Re: [Bug-apl] ISO Monadic Quad-FX

[Juergen Sauermann]

Hi Louis, the IBM APL2 reference p. 292 says: Invalid Definition: If the definition is not valid, Z is a scalar integer indicating the first row of the function or operator line in error. This integer is dependent on ⎕IO. I believe the equivalence mentioned in the ISO standard is only valid when the function definition C is valid. /// Jürgen On 06/26/2016 03:04 AM, Louis de Forcrand wrote: I've been browsing through the system functions in the standard, and found a (somewhat negligible) inconsistency in GNU APL's implementation of monadic ⎕FX. Shouldn't this use of ⎕FX: - define a monad TEST - return 'TEST' ?       )CLEAR CLEAR WS       ⎕FX ⊃'∇Z←TEST X' '⎕←"hi"' 'Z←X∇' 1       )FNS       TEST 5 VALUE ERROR       TEST 5       ^        Clearly ⎕CR ⎕FX C yields an error as well, while the standard states that it should be equivalent to C (which is a well-formed character matrix) on page 203. In addition, AFAIK GNU APL's ⎕FX returns 1 no matter what I feed it. Maybe my character matrix is ill-formed? Yes, I should remove the del characters. Then ⎕FX works as described in the standard, except when it should signal errors. Unless the returned 1 is intended behaviour? Thanks, Louis