Re: [fpc-pascal] TFPGObjectList error
On Sat, 30 Jun 2018, Jim Lee wrote: On 06/30/18 19:42, Ryan Joseph wrote: Is that part of the RTL and if so what’s the unit name? I had a hard time finding good resources on classes the RTL provides. That has been my experience as well. Is there a definitive source of documentation for both Free Pascal and Lazarus? Anyone? Please don't say the wiki. And "read the source" is not useful when one doesn't even know where to look, given the lack of documentation on what's available and how it's laid out. I have been forced to use my old Delphi reference manuals, and that is less than ideal. At some point I'd even like to contribute to the documentation, but right now it's a Catch-22 that has me seriously considering giving up on these tools (and that from 40+ years of programming veteran!)... Can you explain what you think is wrong with or missing in the official documentation ? (apart from a search mechanism) Michael.___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Loss of precision when using math.Max()
On 29/06/18 21:55, Sven Barth via fpc-pascal wrote:
Am 29.06.2018 um 18:45 schrieb Alan Krause:
I stumbled upon something the other day that was causing numerical
differences between compiled Delphi and FPC code. Executing the
following sample console application illustrates the issue clearly:
program test;
uses
math, SysUtils;
var
arg1 : double;
arg2 : double;
res : double;
begin
arg1 := 10.00;
arg2 := 72500.51;
writeln( 'arg1 = ' + FormatFloat( '0.', arg1 ) );
writeln( 'arg2 = ' + FormatFloat( '0.', arg2 ) );
res := arg1 - arg2;
writeln( 'arg1 - arg2 = ' + FormatFloat( '0.', res ) );
writeln( 'Max( arg1 - arg2, 0 ) = ' + FormatFloat( '0.',
Max( res, 0 ) ) );
writeln( 'Max( arg1 - arg2, 0.0 ) = ' + FormatFloat( '0.',
Max( res, 0.0 ) ) );
end.
--- begin output (Linux x86_64) ---
arg1 = 10.
arg2 = 72500.5100
arg1 - arg2 = 27499.4900
*Max( res, 0 ) = 27499.49023438*
Max( res, 0.0 ) = 27499.4900
--- end output ---
I am guessing that the integer value of zero is causing the wrong
overloaded function to be called? I was able to solve the problem in
my code by replacing the 0 with 0.0.
The compiler converts the 0 to the type with the lowest precision that
can hold the value (or the largest if none can hold it exactly). For 0
this is already satisfied by Single, so the compiler essentially has the
parameter types Double and Single. For some reason (I don't know whether
it's due to a bug or by design) it picks the Single overload instead of
the Double one.
Someone who knows more about the compiler's overload handling would need
to answer why it favors (Single, Single) over (Double, Double) for
(Double, Single) parameters (or (Single, Double), the order doesn't
matter here).
Regards,
Sven
More confusingly, if a single variable is used, the expected Max(Double,
Double) is called:
function Max(a, b: Double): Double; overload;
begin
WriteLn('Double');
if a > b then Result := a else Result := b;
end;
function Max(a, b: Single): Single; overload;
begin
WriteLn('Single');
if a > b then Result := a else Result := b;
end;
var
v1: Double;
v2: Single;
begin
v1 := Pi;
v2 := 0;
WriteLn(v1);
WriteLn(Max(v1,0));
WriteLn(Max(v1,0.0));
WriteLn(Max(v1,v2));
end.
Prints:
3.1415926535897931E+000
Single
3.141592741E+00
Double
3.1415926535897931E+000
Double
3.1415926535897931E+000
If this is not a bug, it would be very helpful if the compiler could
print a warning whenever a value is implicitly converted from double to
single.
Colin
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Re: [fpc-pascal] TFPGObjectList error
In our previous episode, Michael Van Canneyt said: > Can you explain what you think is wrong with or missing in the official > documentation ? > (apart from a search mechanism) (the CHM form of the documentation has fulltext search, indexes etc. On Windows you can just click them to open. It also works from Lazarus, but you can also try a 3rd party CHM viewer like kchmviewer, though in my opinion the quality of those varies) ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] TFPGObjectList error
On Sun, 1 Jul 2018, Marco van de Voort wrote: In our previous episode, Michael Van Canneyt said: Can you explain what you think is wrong with or missing in the official documentation ? (apart from a search mechanism) (the CHM form of the documentation has fulltext search, indexes etc. On Windows you can just click them to open. I know. we have fpIndexer to make such an index. I just need to find time to integrate building the index into the deployment process and add a link in the header. The length of my todo list can no longer be expressed in an Int64. Maybe we need to add Int128 to the compiler... Michael. ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Daemon using TTimer on Windows
On Sat, Jun 30, 2018 at 9:13 PM, R0b0t1 wrote: > On Sat, Jun 30, 2018 at 3:57 PM, Marcos Douglas B. Santos > wrote: >> Hi, >> >> I need to build a daemon app on Windows. It will need a timer to >> performe some tasks. This timer could be big among 15 min, 30 min, 2 >> hours, etc. >> >> I thought that I can use TTimer but I've always heard that it's not >> possible because some problems related with "NoGUI" stuff. >> >> I've found a thread[1] which talks about that but they haven't >> provided a real solution, at least for Windows. >> >> My question is: Nowadays, can I use TTimer with no restrictions in a >> daemon application on Windows? If not, which could be a possible >> solution? >> > > If all your service does is wait for the timer you should instead use > a scheduled task. Actually, it could be a better idea. I will check the requirements and think if this would be possible. > Anyway - does TTimer use the WM_TIMER message? That is the type tied > to the GUI. Even if you need to use WM_TIMER for some reason you can, > as services should be run in "session 0" and should have access to a > GUI. The latter is, I think, a compatibility option you can enable. I didn't understand this "session 0"... is it a something related to Lazarus or Windows? > If you are not opposed to OS-level primitives you should use waitable > timers > (https://docs.microsoft.com/en-us/windows/desktop/sync/using-waitable-timer-objects). > Using waitable timers you can also wake the computer from sleep. I'm not opposed at all. Indeed I didn't know these functions... sounds a good option. Thanks. Regards, Marcos Douglas ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Daemon using TTimer on Windows
On Sun, Jul 1, 2018 at 2:15 AM, Martin Schreiber wrote: > On Saturday 30 June 2018 22:57:47 Marcos Douglas B. Santos wrote: > >>If not, which could be a possible >> solution? >> > You could use a MSEgui application, instead of > " > uses > msegui; > " > write > " > uses > msenogui; > " > in "program" source file. It will have an event queue and the usual event > driven programming paradigm including the use of datamodules and graphically > placed non visual components. Examples are here: > > https://gitlab.com/mseide-msegui/mseuniverse/tree/master/attic/msedocumenting/mse/trunk/help/tutorials/nogui Hey Martin, thanks to give me another good option. I'll check it. Regards, Marcos Douglas ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] Daemon using TTimer on Windows
On Sun, Jul 1, 2018 at 8:06 AM, Marcos Douglas B. Santos wrote: > On Sat, Jun 30, 2018 at 9:13 PM, R0b0t1 wrote: >> Anyway - does TTimer use the WM_TIMER message? That is the type tied >> to the GUI. Even if you need to use WM_TIMER for some reason you can, >> as services should be run in "session 0" and should have access to a >> GUI. The latter is, I think, a compatibility option you can enable. > > I didn't understand this "session 0"... is it a something related to > Lazarus or Windows? > It is something related to Windows, and the reason services can not use the GUI. A session is started for each terminal services instance. A session contains multiple window stations, each of which contains at least one desktop, one of which accepts keyboard/mouse input. One terminal services instance exists by default, and it is the "local session," i.e. the one that consumes physical keyboard and mouse input and outputs to the screen. It used to be that this local session was the one that ran services in addition to logged in user programs. This made it easier than it should have been to exploit service processes, so they made session 0 noninteractive and now the console logs in to session 1. One exploit was particularly bad. You can forcibly register WM_TIMER callbacks for an application and have that callback run in that processes' thread. As long as services were running in the same desktop you could trivially run code as SYSTEM. More information at https://blogs.technet.microsoft.com/askperf/2007/04/27/application-compatibility-session-0-isolation/ but it is not a lot. There is a better MSDN article I could not find. Cheers, R0b0t1 ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] TFPGObjectList error
> On Jul 1, 2018, at 6:19 AM, Marco van de Voort wrote: > > (the CHM form of the documentation has fulltext search, indexes etc. On > Windows you can just click them to open. The CHM reader can be searched so why doesn’t search work for the web interface? I would think there would be a standard script for displaying that format online. Also the RTL is missing collections.generics. Is that because it’s a new addition? Regards, Ryan Joseph ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] TFPGObjectList error
In our previous episode, Michael Van Canneyt said: > > (the CHM form of the documentation has fulltext search, indexes etc. On > > Windows you can just click them to open. > > I know. we have fpIndexer to make such an index. The CHM packages has its own (afaik with phrase compression) > I just need to find time to integrate building the index into the > deployment process and add a link in the header. > > The length of my todo list can no longer be expressed in an Int64. > Maybe we need to add Int128 to the compiler... True. I actually have a local webserver based helpsystem that loads the CHMs on my todo. Even to just be able to easier check working on non Windows systems. gnochm and kchmviewer are more often broken than not for non trivial files. ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] TFPGObjectList error
On 07/01/18 01:03, Michael Van Canneyt wrote: Can you explain what you think is wrong with or missing in the official documentation ? (apart from a search mechanism) Michael. Well, search is a big one, but there seems to be a lot of missing pieces (again, without search it's hard to tell exactly how much is missing). There also seems to be a lot of outdated stuff, and most of what I find was auto-generated from fpdoc (when? last week or 10 years ago? no timestamps!), with scant (or no) explanation beyond "here is a terse, un-commented example". I haven't found any sort of map or tree that shows how the rtl and fcl are organized, or an index that shows which types/functions/classes are in which units (that's hugely important). Basically, I expected to find the equivalent of the old Borland programmer's reference manuals. The most common scenario for me is this: "I wonder if fpc (or Lazarus) already has ". Go to the wiki and browse haphazardly, looking for something named similarly. If that something is found, and looks promising, follow link to a half-page of "documentation" which is basically just a snippet of the interface section in the source. Then, try to find the referenced module in my local source tree and discover that it's not quite the same, or is not what I was looking for in the first place. Rinse and repeat. I would love to be able to use fpc, as it's pretty much the only game in town when it comes to a cross-platform Pascal able to be used for low-level, even bare metal programming. I also realize that documentation is often low on the list of priorities - but good documentation is vital to build a user base, and bad documentation is what drives people away. -Jim ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] TFPGObjectList error
On 07/01/2018 02:38 PM, Jim Lee wrote: The most common scenario for me is this: "I wonder if fpc (or Lazarus) already has ". Go to the wiki and browse haphazardly, looking for [...] that may be part of your problem... you're looking in a wiki instead of a more proper place... all the FPC docs i read on the web are almost exactly like the help files you can use locally with a CHM viewer or similar... what you are looking for are these... https://www.freepascal.org/docs-html/rtl/index.html https://www.freepascal.org/docs-html/fcl/index.html and actually, you would start here at the beginning... https://www.freepascal.org/docs.var it is rather interesting that the above docs.var doesn't appear to be mentioned in the wiki's page for Lazarus_Documentation... all the links in the #Free_Pascal_Compiler_Documentation section of that page point to lazarus-ccr instead of the above docs.var location... i don't know which is right but i do know you're not looking in the right place or your google-fu is lacking a bit... i started this reply with a search for "freepascal runtime library" and the second hit was the docs-html one above... ;) -- NOTE: No off-list assistance is given without prior approval. *Please keep mailing list traffic on the list unless* *a signed and pre-paid contract is in effect with us.* ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] TFPGObjectList error
On 07/01/18 12:07, wkitt...@windstream.net wrote: On 07/01/2018 02:38 PM, Jim Lee wrote: The most common scenario for me is this: "I wonder if fpc (or Lazarus) already has ". Go to the wiki and browse haphazardly, looking for [...] that may be part of your problem... you're looking in a wiki instead of a more proper place... all the FPC docs i read on the web are almost exactly like the help files you can use locally with a CHM viewer or similar... what you are looking for are these... https://www.freepascal.org/docs-html/rtl/index.html https://www.freepascal.org/docs-html/fcl/index.html and actually, you would start here at the beginning... https://www.freepascal.org/docs.var it is rather interesting that the above docs.var doesn't appear to be mentioned in the wiki's page for Lazarus_Documentation... all the links in the #Free_Pascal_Compiler_Documentation section of that page point to lazarus-ccr instead of the above docs.var location... i don't know which is right but i do know you're not looking in the right place or your google-fu is lacking a bit... i started this reply with a search for "freepascal runtime library" and the second hit was the docs-html one above... ;) That is exactly the documentation I'm talking about. I've seen all of them. I got to them via the wiki, so I suppose I should have said "The wiki, and documentation linked to from there". -Jim ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] TFPGObjectList error
On 07/01/2018 03:13 PM, Jim Lee wrote: That is exactly the documentation I'm talking about. I've seen all of them. I got to them via the wiki, so I suppose I should have said "The wiki, and documentation linked to from there". oh!! ok, well... i think the docs.var one i pointed out above is the better one... i don't know why but i do... it is where i always go... it also has dates at the very bottom of when it was generated... the rtl one i linked to was generated in 2017... bookmark that docs.var link ;) -- NOTE: No off-list assistance is given without prior approval. *Please keep mailing list traffic on the list unless* *a signed and pre-paid contract is in effect with us.* ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] TFPGObjectList error
On Sun, 1 Jul 2018, Jim Lee wrote: On 07/01/18 01:03, Michael Van Canneyt wrote: Can you explain what you think is wrong with or missing in the official documentation ? (apart from a search mechanism) Michael. Well, search is a big one, but there seems to be a lot of missing pieces (again, without search it's hard to tell exactly how much is missing). There also seems to be a lot of outdated stuff, and most of what I find was auto-generated from fpdoc (when? last week or 10 years ago? no timestamps!), with scant (or no) explanation beyond "here is a terse, un-commented example". The documentation is brought up to date at every release: all new identifiers are documented and the documentation regenerated. If you look in the bugtracker, you will see that I regularly fix documentation issues. If you think it is too terse in places, please report them in the bugtracker. I will always fix all such reports. I haven't found any sort of map or tree that shows how the rtl and fcl are organized, or an index that shows which types/functions/classes are in which units (that's hugely important). Basically, I expected to find the equivalent of the old Borland programmer's reference manuals. It is all there, user's guide, language reference, programmer's guide, Reference to *all* rtl units. What do you think is missing ? See https://www.freepascal.org/docs.var index: RTL: https://www.freepascal.org/docs-html/current/rtl/index-8.html FCL: https://www.freepascal.org/docs-html/current/fcl/index-8.html The most common scenario for me is this: "I wonder if fpc (or Lazarus) already has ". Go to the wiki and browse haphazardly, looking for something named similarly. If that something is found, and looks promising, follow link to a half-page of "documentation" which is basically just a snippet of the interface section in the source. Then, try to find the referenced module in my local source tree and discover that it's not quite the same, or is not what I was looking for in the first place. Rinse and repeat. I don't know what documentation you are referring to, but as said, all basic RTL units, and selected FCL units are documented: https://www.freepascal.org/docs.var Packages are another story. I checked the packages. There are roughly 16.000 classes. I didn't count methods/functions, but they surely are a multiple of that. There is 1 documenter: me. I have toyed with the idea to run fpDoc on all packages, and put the result online, so people can at least have a look in the index to see what's available., Feel free to chip in. Michael.___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] TFPGObjectList error
On 07/01/18 12:28, Michael Van Canneyt wrote: The documentation is brought up to date at every release: all new identifiers are documented and the documentation regenerated. If you look in the bugtracker, you will see that I regularly fix documentation issues. Thanks. The user's guide, programmer's guide, and language reference manual all say they are for version 3.0.2. Perhaps the current version didn't require any documentation changes? If you think it is too terse in places, please report them in the bugtracker. I will always fix all such reports. That really wasn't my point. From the point of view of someone just coming to fpc, the documentation is the "face" of the product. If that face is ugly or hard to navigate, they are likely to just walk away. Getting involved in the bugtracker is for people already invested in fpc, and familiar enough with it to not *need* the documentation. It is all there, user's guide, language reference, programmer's guide, Reference to *all* rtl units. What do you think is missing ? See https://www.freepascal.org/docs.var Perhaps the rtl is more complete than the rest - I'll take your word for it. I know it's a tremendous amount of work! The class library chart on that page is nice, but it's 11 years old (dated 2007). index: RTL: https://www.freepascal.org/docs-html/current/rtl/index-8.html FCL: https://www.freepascal.org/docs-html/current/fcl/index-8.html An auto-generated index of all identifiers used across all modules is useful, if you know what you're looking for. Say I was looking for something like a Timer class - where do I start? Would it be in the rtl, the fcl, or somewhere else? Would it be named Timer, TTimer, or something else? I can't find an index that has an entry for "timer" and points to all the timer-related things. Packages are another story. I checked the packages. There are roughly 16.000 classes. I didn't count methods/functions, but they surely are a multiple of that. There is 1 documenter: me. Pardon my ignorance, but I take it that "packages" is more like an un-curated repository of contributions rather than an official part of the fpc distribution? If so, I wasn't aware of that. It would explain a big part of my frustration. -Jim ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] TFPGObjectList error
> On Jul 1, 2018, at 1:28 PM, Michael Van Canneyt > wrote: > > RTL: https://www.freepascal.org/docs-html/current/rtl/index-8.html Without a good search feature these are really hard to use. Searching should be the first priority. Can’t we just make a little script to put on the server which searches the original indexed format which the HTML is derived from? It would be so easy to make something that’s cheap but at least works. Regards, Ryan Joseph ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
[fpc-pascal] List of chars for case
Is there a way to make a constant for a list of chars which I can use in a case
statement? I’ve got a bunch of code duplication happening I’d like to clean up.
const
TChars = ('[', ']', '(', ')', '{', '}', '=', ‘:’);
case c of
TChars:
...
Regards,
Ryan Joseph
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Re: [fpc-pascal] List of chars for case
On Sun, Jul 1, 2018 at 5:51 PM, Ryan Joseph wrote:
> Is there a way to make a constant for a list of chars which I can use in a
> case statement? I’ve got a bunch of code duplication happening I’d like to
> clean up.
>
> const
> TChars = ('[', ']', '(', ')', '{', '}', '=', ‘:’);
>
>
> case c of
> TChars:
> ...
>
I suspect you may need to use sets and the "in" operator.
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Re: [fpc-pascal] TFPGObjectList error
On Sun, 1 Jul 2018, Ryan Joseph wrote: On Jul 1, 2018, at 1:28 PM, Michael Van Canneyt wrote: RTL: https://www.freepascal.org/docs-html/current/rtl/index-8.html Without a good search feature these are really hard to use. Searching should be the first priority. Can’t we just make a little script to put on the server which searches the original indexed format which the HTML is derived from? It would be so easy to make something that’s cheap but at least works. And to what page would this script then point when you find something ? If it was easy, it would have been done already. But, here's your shot at contributing :) Michael.___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] TFPGObjectList error
On Sun, 1 Jul 2018, Jim Lee wrote: On 07/01/18 12:28, Michael Van Canneyt wrote: The documentation is brought up to date at every release: all new identifiers are documented and the documentation regenerated. If you look in the bugtracker, you will see that I regularly fix documentation issues. Thanks. The user's guide, programmer's guide, and language reference manual all say they are for version 3.0.2. Perhaps the current version didn't require any documentation changes? Seems I forgot to update the symlink when we released. I fixed that. Thanks for pointing it out. If you think it is too terse in places, please report them in the bugtracker. I will always fix all such reports. That really wasn't my point. From the point of view of someone just coming to fpc, the documentation is the "face" of the product. If that face is ugly or hard to navigate, they are likely to just walk away. Getting involved in the bugtracker is for people already invested in fpc, and familiar enough with it to not *need* the documentation. I consider this an error in your reasoning. The bugtracker is very lowlevel, and should be usable and familiar for all. Many of the documentation bugreports are from one-time users, people I never have heard from. It is all there, user's guide, language reference, programmer's guide, Reference to *all* rtl units. What do you think is missing ? See https://www.freepascal.org/docs.var Perhaps the rtl is more complete than the rest - I'll take your word for it. I know it's a tremendous amount of work! The class library chart on that page is nice, but it's 11 years old (dated 2007). This is known. I better remove it, it does more damage than good now. index: RTL: https://www.freepascal.org/docs-html/current/rtl/index-8.html FCL: https://www.freepascal.org/docs-html/current/fcl/index-8.html An auto-generated index of all identifiers used across all modules is useful, if you know what you're looking for. Say I was looking for something like a Timer class - where do I start? Would it be in the rtl, the fcl, or somewhere else? Would it be named Timer, TTimer, or something else? I can't find an index that has an entry for "timer" and points to all the timer-related things. In the absence of a search mechanism: You would get a long way if go to the FCL page, press ctrl-f and type timer in the search box of your browser.. The 4th hit on the page gives you fptimer, the unit that contains a timer. But most of the time when I search for something, I just enter google, type "free pascal timer". The third hit is the same as the one I mention above. You can't beat google for ease of use and accuracy. Packages are another story. I checked the packages. There are roughly 16.000 classes. I didn't count methods/functions, but they surely are a multiple of that. There is 1 documenter: me. Pardon my ignorance, but I take it that "packages" is more like an un-curated repository of contributions rather than an official part of the fpc distribution? If so, I wasn't aware of that. It would explain a big part of my frustration. FPC's "packages" are not uncurated. They are mostly import units, allowing you to work with all kinds of open source libraries. On top of these e.g. the data acces units are built. But I know that search is an issue, hence my question "what is the problem with the documentation _besides_ search". Contrary to what it may seem it is not so easy to make a search engine for the documentation. I've had several shots at it, but have not yet come up with a good mechanism. The last mechanism I tried ended up indexing more than 24 hours before I killed it. Contributions or ideas welcome. Michael.___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] List of chars for case
Ryan Joseph wrote:
Is there a way to make a constant for a list of chars which I can use in a case
statement? I’ve got a bunch of code duplication happening I’d like to clean up.
const
TChars = ('[', ']', '(', ')', '{', '}', '=', ‘:’);
case c of
TChars:
...
Regards,
Ryan Joseph
case c of
'[', ']', '(', ')', '{', '}', '=', ':' : result := true;
end;
Dennis
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