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|    comp.lang.forth    |    Forth programmers eat a lot of Bratwurst    |    117,927 messages    |
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|    Message 117,298 of 117,927    |
|    Ruvim to dxf    |
|    Re: QUIT and ABORT    |
|    06 May 25 10:58:08    |
      From: ruvim.pinka@gmail.com              On 2025-05-06 06:55, dxf wrote:       > On 6/05/2025 3:29 am, Ruvim wrote:       >> On 2025-05-05 08:11, dxf wrote:       >>> ...       >>> However modifying it to do so gives these results:       >>>       >>> 1 .( a ) cr -56 throw .( b )       >>>       >>> 'a' is displayed and the stack is: 1       >>       >> This violates the behavior of `throw` specified in 9.6.1.2275,       >> because if there is no a user's exception frame, the data stack must be       emptied.       >>       >> The table 9.1 in Forth-2012 (or 9.2 in Forth-94) does not affect the       behavior of `throw` at all.       >       > Except THROW special-cased codes -1 and -2 effectively reserving their       behaviour.       > One can speculate why ANS didn't do so for -56 but to my mind QUIT when       implemented       > should function as expected i.e. -56 THROW uncaught should perform QUIT.       >              You suggest to make -56 a special case in `throw`. But what is the       rationale for this?              Yes, -1 and -2 are special cases in 9.6.1.2275 (when there is no user       exception frame). But for those cases it *only* specifies what message       shall be displayed, and *nothing more*. The standard should have       specified this messages anyway, and the only choice was which section to       specify it in.                     --       Ruvim              --- SoupGate-DOS v1.05        * Origin: you cannot sedate... all the things you hate (1:229/2)    |
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