* Re: No! [not found] ` <3355E2D9.243@aonix.com> @ 1997-04-17 0:00 ` Gautier 1997-04-17 0:00 ` No! Oliver Kellogg 1997-04-17 0:00 ` Examine my code! Dale Stanbrough 1 sibling, 1 reply; 9+ messages in thread From: Gautier @ 1997-04-17 0:00 UTC (permalink / raw) > Yes! Me too. ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: Examine my code! [not found] ` <3355E2D9.243@aonix.com> 1997-04-17 0:00 ` No! Gautier @ 1997-04-17 0:00 ` Dale Stanbrough 1 sibling, 0 replies; 9+ messages in thread From: Dale Stanbrough @ 1997-04-17 0:00 UTC (permalink / raw) Robert Dewar writes: "A somewhat cryptic post :-) Dale Stanbrough: >No! Dale" :-) Ah, the toubles you have when you use good tools :-) My threaded newsreader quite ably showed this as a followup to a post entitled "Examine my code!". Ah well, no more subject line jokes i suppose! Dale :-) ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: Examine my code! [not found] <01bc49c1$c8c990a0$c47d8ea1@AaBbCcDd> [not found] ` <3355E2D9.243@aonix.com> @ 1997-04-20 0:00 ` Nick Roberts 1997-04-23 0:00 ` Centaury 1997-04-24 0:00 ` Keith Thompson 1997-04-29 0:00 ` Examine my code! Odo Wolbers 2 siblings, 2 replies; 9+ messages in thread From: Nick Roberts @ 1997-04-20 0:00 UTC (permalink / raw) The answer is to use Get_Line(Command); instead of just get(command) Reason why: things getting stuck in the buffer. Nick. ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: Examine my code! 1997-04-20 0:00 ` Nick Roberts @ 1997-04-23 0:00 ` Centaury 1997-04-24 0:00 ` Keith Thompson 1 sibling, 0 replies; 9+ messages in thread From: Centaury @ 1997-04-23 0:00 UTC (permalink / raw) You can't get_line a variable, can you? -- Please mail replies to : utopian@pl.jaring.my ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: Examine my code! 1997-04-20 0:00 ` Nick Roberts 1997-04-23 0:00 ` Centaury @ 1997-04-24 0:00 ` Keith Thompson 1997-04-26 0:00 ` Text input on a console Nick Roberts 1 sibling, 1 reply; 9+ messages in thread From: Keith Thompson @ 1997-04-24 0:00 UTC (permalink / raw) In <01bc4d85$4c127b40$f4f582c1@xhv46.dial.pipex.com> "Nick Roberts" <Nick.Roberts@dial.pipex.com> writes: > The answer is to use > > Get_Line(Command); > > instead of just > > get(command) > > Reason why: things getting stuck in the buffer. That's the problem, but it's not the solution. In the previously posted program, Command is an object of an enumeration type. There is no Get_Line procedure for enumeration types (though it wouldn't be difficult to write one). Take a look at the original program and consider exactly what happens if the statement Get(Command) raises an exception. The solution, of course, is left as an exercise for the student. (I welcome e-mail feedback from educators on whether this is the right level of response for this kind of question.) -- Keith Thompson (The_Other_Keith) kst@sd.aonix.com <http://www.aonix.com> <*> TeleSo^H^H^H^H^H^H Alsy^H^H^H^H Thomson Softw^H^H^H^H^H^H^H^H^H^H^H^H^H Aonix 5040 Shoreham Place, San Diego, CA, USA, 92122-5989 "Humor is such a subjective thing." -- Cartagia ^ permalink raw reply [flat|nested] 9+ messages in thread
* Text input on a console 1997-04-24 0:00 ` Keith Thompson @ 1997-04-26 0:00 ` Nick Roberts 1997-04-27 0:00 ` Jerry van Dijk 0 siblings, 1 reply; 9+ messages in thread From: Nick Roberts @ 1997-04-26 0:00 UTC (permalink / raw) Keith Thompson <kst@sd.aonix.com> wrote in article <E961o5.AuL@thomsoft.com>... > In <01bc4d85$4c127b40$f4f582c1@xhv46.dial.pipex.com> "Nick Roberts" <Nick.Roberts@dial.pipex.com> writes: > > The answer is to use > > > > Get_Line(Command); > > > > instead of just > > > > get(command) > > > > Reason why: things getting stuck in the buffer. > > That's the problem, but it's not the solution. > > In the previously posted program, Command is an object of an enumeration > type. There is no Get_Line procedure for enumeration types (though it > wouldn't be difficult to write one). I blunder again. Sorry (the little yellow tablets strike again). However, this does raise another point, of more general interest. The behaviour of a program when inputting text from a console is relatively undefined in Ada (as in most languages). It may be impracticable to try to formally define things more closely (i.e. in the RM), but it may be sensible to informally define things a little bit more than the RM, somehow. When GET is used to read a string, or other type, from the console, should the program wait for a carriage-return ('cooked' or 'buffered' mode) or just get the characters directly ('raw' mode)? Should special characters (like backspace, control-D, control-Z, ESC, etc.) be automatically supported? Should there be some agreed parameters in the FORM parameter to specify this sort of thing? (And, in which case, what do we do about STANDARD_INPUT?) Comments welcome. Nick. ^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: Text input on a console 1997-04-26 0:00 ` Text input on a console Nick Roberts @ 1997-04-27 0:00 ` Jerry van Dijk 0 siblings, 0 replies; 9+ messages in thread From: Jerry van Dijk @ 1997-04-27 0:00 UTC (permalink / raw) In article <01bc524d$a0fe21a0$28f982c1@xhv46.dial.pipex.com> Nick.Roberts@dial.pipex.com writes: >However, this does raise another point, of more general interest. The >behaviour of a program when inputting text from a console is relatively >undefined in Ada (as in most languages). It may be impracticable to try to >formally define things more closely (i.e. in the RM), but it may be >sensible to informally define things a little bit more than the RM, >somehow. "Define informally" ? Although I sympathize with the idea, how would one go about this ? >When GET is used to read a string, or other type, from the console, should >the program wait for a carriage-return ('cooked' or 'buffered' mode) or >just get the characters directly ('raw' mode)? Like Get vs Get_Immediate ? The problem is of course how to go about it in a portable way as this is purely OS dependend. >Should special characters >(like backspace, control-D, control-Z, ESC, etc.) be automatically >supported? As these are part of Latin-1 that shouldn't be much of a problem, but how about Ctrl-Home or Gold-F1 ? Or are you talking about the Line Editing features of the OS ? > Should there be some agreed parameters in the FORM parameter to >specify this sort of thing? (And, in which case, what do we do about >STANDARD_INPUT?) One solution might be the way C compilers for DOS solved it: using a special Console I/O (conio) package. This could be in a special Annex, applicable only to platforms that support terminal based or interactive I/O. Since the IS Annex comes close to this, I wonder if such a package (which would do wonders for the portability of console apps) has been considered. A good candidate would be a binding to termios, if it were supported on all platforms (GNAT doesn't, it even can't agree on the implementation of Get_Immediate between different ports...) >Comments welcome. You asked for it :-) -- -- Jerry van Dijk | Leiden, Holland -- Business Consultant | Team Ada -- Ordina Finance | jdijk@acm.org ^ permalink raw reply [flat|nested] 9+ messages in thread
* Examine my code! [not found] <01bc49c1$c8c990a0$c47d8ea1@AaBbCcDd> [not found] ` <3355E2D9.243@aonix.com> 1997-04-20 0:00 ` Nick Roberts @ 1997-04-29 0:00 ` Odo Wolbers 2 siblings, 0 replies; 9+ messages in thread From: Odo Wolbers @ 1997-04-29 0:00 UTC (permalink / raw) > SkipLine; > > in this expression to throw away the Inputline like this: > > exception > when data_error=> > put("Invalid command! Type help."); > newline; > SkipLine; > end; Oops, where are the underscores? I meant Skip_Line; and New_Line; ciao Odo ^ permalink raw reply [flat|nested] 9+ messages in thread
end of thread, other threads:[~1997-04-29 0:00 UTC | newest] Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- [not found] <01bc49c1$c8c990a0$c47d8ea1@AaBbCcDd> [not found] ` <3355E2D9.243@aonix.com> 1997-04-17 0:00 ` No! Gautier 1997-04-17 0:00 ` No! Oliver Kellogg 1997-04-17 0:00 ` Examine my code! Dale Stanbrough 1997-04-20 0:00 ` Nick Roberts 1997-04-23 0:00 ` Centaury 1997-04-24 0:00 ` Keith Thompson 1997-04-26 0:00 ` Text input on a console Nick Roberts 1997-04-27 0:00 ` Jerry van Dijk 1997-04-29 0:00 ` Examine my code! Odo Wolbers
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