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Groups > comp.lang.forth > #27390
| From | anton@mips.complang.tuwien.ac.at (Anton Ertl) |
|---|---|
| Newsgroups | comp.lang.forth |
| Subject | Re: What about code blocks (not Forth blocks)? |
| Date | 2013-12-20 17:46 +0000 |
| Organization | Institut fuer Computersprachen, Technische Universitaet Wien |
| Message-ID | <2013Dec20.184631@mips.complang.tuwien.ac.at> (permalink) |
| References | <583c56b0-8514-4e6c-a120-029bce9ad7c1@googlegroups.com> <2013Dec19.165803@mips.complang.tuwien.ac.at> <4535bd12-7ebd-42fa-8dde-6eeb8d1d740a@googlegroups.com> <2013Dec20.134114@mips.complang.tuwien.ac.at> |
anton@mips.complang.tuwien.ac.at (Anton Ertl) writes:
>Alexander Skobelev <al.skobelev@gmail.com> writes:
>> For
>>without access to local variables I don't see an easy way to implement
>>something like I did with my dirty implementation:
>>
>>: test-hello { c-addr u -- }
>> u 15 <
>> [:
>> [: c-addr u S" Hello" cstring-prefix ;]=20
>> [: c-addr u S" How do you do" cstring-contains ;] e-or
>> [: c-addr u S" How are you" cstring-contains ;] e-or
>> [: c-addr u S" Good morning" cstring-prefix ;] e-or
>> ;] e-and
>>=20
>> if ." Hello! " else ." Bye!" then cr ;
>
>Just use the stack.
Another alternative would be to define short-circuit words that do not
take quotations but just compile control-flow code directly. I don't
see any advantage from the use of quotations for implementing
short-circuit conditionals. And then you can use locals even inside
the short-circuited code, and the implementation will be more
efficient.
Wil Baden has done some work on short-circuiting words, but I don't
remember what names he used, so I will just make up my own:
: or< ( f -- )
postpone 0= postpone if ; immediate
: >or ( -- )
postpone else postpone true postpone then ; immediate
: and< ( f -- )
postpone if ; immediate
: >and ( -- )
postpone else postpone false postpone then ; immediate
: string-contains? ( c-addr1 u1 c-addr2 u2 -- f )
search nip nip ;
: test-hello { c-addr u -- }
u 15 < and<
c-addr u S" Hello" string-prefix? or<
c-addr u S" How do you do" string-contains? or<
c-addr u S" How are you" string-contains? or<
c-addr u S" Good morning" string-prefix? >or >or >or >and
if ." Hello! " else ." Bye!" then cr ;
I guess one can get rid of the "else <lit-flag> then" parts in some
way, and Wil Baden probably did, but that's good enough for
demonstration purposes. The test worked fine:
s" How are you" test-hello .s Hello!
<0> ok
s" Good morning" test-hello .s Hello!
<0> ok
s" How are you" test-hello .s Hello!
<0> ok
s" xHow do you do" test-hello .s Hello!
<0> ok
s" Hello" test-hello .s Hello!
<0> ok
s" Hi" test-hello .s Bye!
<0> ok
- anton
--
M. Anton Ertl http://www.complang.tuwien.ac.at/anton/home.html
comp.lang.forth FAQs: http://www.complang.tuwien.ac.at/forth/faq/toc.html
New standard: http://www.forth200x.org/forth200x.html
EuroForth 2013: http://www.euroforth.org/ef13/
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What about code blocks (not Forth blocks)? Alexander Skobelev <al.skobelev@gmail.com> - 2013-12-17 23:56 -0800
Re: What about code blocks (not Forth blocks)? mhx@iae.nl - 2013-12-18 01:14 -0800
Re: What about code blocks (not Forth blocks)? Mark Wills <markrobertwills@yahoo.co.uk> - 2013-12-18 01:34 -0800
Re: What about code blocks (not Forth blocks)? Alexander Skobelev <al.skobelev@gmail.com> - 2013-12-18 02:33 -0800
Re: What about code blocks (not Forth blocks)? Coos Haak <chforth@hccnet.nl> - 2013-12-18 14:36 +0100
Re: What about code blocks (not Forth blocks)? Alexander Skobelev <al.skobelev@gmail.com> - 2013-12-18 06:24 -0800
Re: What about code blocks (not Forth blocks)? Coos Haak <chforth@hccnet.nl> - 2013-12-19 02:54 +0100
Re: What about code blocks (not Forth blocks)? Alexander Skobelev <al.skobelev@gmail.com> - 2013-12-18 22:12 -0800
Re: What about code blocks (not Forth blocks)? mhx@iae.nl - 2013-12-18 05:43 -0800
Re: What about code blocks (not Forth blocks)? albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-12-18 11:21 +0000
Re: What about code blocks (not Forth blocks)? Alexander Skobelev <al.skobelev@gmail.com> - 2013-12-18 04:31 -0800
Re: What about code blocks (not Forth blocks)? Ilya Tarasov <ilya74.tarasov@gmail.com> - 2013-12-18 04:49 -0800
Re: What about code blocks (not Forth blocks)? Alexander Skobelev <al.skobelev@gmail.com> - 2013-12-18 05:12 -0800
Re: What about code blocks (not Forth blocks)? "Elizabeth D. Rather" <erather@forth.com> - 2013-12-18 08:26 -1000
Re: What about code blocks (not Forth blocks)? Paul Rubin <no.email@nospam.invalid> - 2013-12-18 11:03 -0800
Re: What about code blocks (not Forth blocks)? Alexander Skobelev <al.skobelev@gmail.com> - 2013-12-18 11:21 -0800
Re: What about code blocks (not Forth blocks)? Alexander Skobelev <al.skobelev@gmail.com> - 2013-12-18 11:19 -0800
Re: What about code blocks (not Forth blocks)? "Elizabeth D. Rather" <erather@forth.com> - 2013-12-18 10:08 -1000
Re: What about code blocks (not Forth blocks)? Bernd Paysan <bernd.paysan@gmx.de> - 2013-12-18 21:58 +0100
Re: What about code blocks (not Forth blocks)? "Ed" <invalid@invalid.com> - 2013-12-19 14:15 +1100
Re: What about code blocks (not Forth blocks)? "Alex McDonald" <blog@rivadpm.com> - 2013-12-19 13:32 +0000
Re: What about code blocks (not Forth blocks)? "Ed" <invalid@invalid.com> - 2013-12-20 21:07 +1100
Re: What about code blocks (not Forth blocks)? "Alex McDonald" <blog@rivadpm.com> - 2013-12-20 12:35 +0000
Re: What about code blocks (not Forth blocks)? "Alex McDonald" <blog@rivadpm.com> - 2013-12-20 13:02 +0000
Re: What about code blocks (not Forth blocks)? "Ed" <invalid@invalid.com> - 2013-12-22 14:19 +1100
Re: What about code blocks (not Forth blocks)? "Alex McDonald" <blog@rivadpm.com> - 2013-12-22 10:15 +0000
Re: What about code blocks (not Forth blocks)? "Ed" <invalid@invalid.com> - 2013-12-24 12:30 +1100
Re: What about code blocks (not Forth blocks)? albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-12-24 16:48 +0000
Re: What about code blocks (not Forth blocks)? "Ed" <invalid@invalid.com> - 2013-12-28 11:08 +1100
Re: What about code blocks (not Forth blocks)? albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-12-28 11:40 +0000
Re: What about code blocks (not Forth blocks)? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-12-26 18:03 +0000
Re: What about code blocks (not Forth blocks)? Paul Rubin <no.email@nospam.invalid> - 2013-12-26 10:34 -0800
Re: What about code blocks (not Forth blocks)? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-12-27 15:53 +0000
Re: What about code blocks (not Forth blocks)? Gerry Jackson <gerry@jackson9000.fsnet.co.uk> - 2013-12-28 17:26 +0000
Re: What about code blocks (not Forth blocks)? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-12-28 17:53 +0000
Re: What about code blocks (not Forth blocks)? Gerry Jackson <gerry@jackson9000.fsnet.co.uk> - 2013-12-28 18:21 +0000
Re: What about code blocks (not Forth blocks)? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-12-29 14:49 +0000
Re: What about code blocks (not Forth blocks)? Gerry Jackson <gerry@jackson9000.fsnet.co.uk> - 2013-12-29 20:45 +0000
Re: What about code blocks (not Forth blocks)? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-12-30 17:08 +0000
Re: What about code blocks (not Forth blocks)? Gerry Jackson <gerry@jackson9000.fsnet.co.uk> - 2013-12-30 20:00 +0000
Re: What about code blocks (not Forth blocks)? albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-12-28 18:04 +0000
Re: What about code blocks (not Forth blocks)? Gerry Jackson <gerry@jackson9000.fsnet.co.uk> - 2013-12-28 18:47 +0000
Re: What about code blocks (not Forth blocks)? Gerry Jackson <gerry@jackson9000.fsnet.co.uk> - 2013-12-28 19:12 +0000
Re: What about code blocks (not Forth blocks)? "Ed" <invalid@invalid.com> - 2013-12-28 11:09 +1100
Re: What about code blocks (not Forth blocks)? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-12-28 13:45 +0000
Re: What about code blocks (not Forth blocks)? Elizabeth D Rather <erather@forth.com> - 2013-12-18 19:04 -1000
Re: What about code blocks (not Forth blocks)? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-12-19 09:25 +0000
Re: What about code blocks (not Forth blocks)? Paul Rubin <no.email@nospam.invalid> - 2013-12-19 05:00 -0800
Re: What about code blocks (not Forth blocks)? Alexander Skobelev <al.skobelev@gmail.com> - 2013-12-18 23:41 -0800
Re: What about code blocks (not Forth blocks)? Alexander Skobelev <al.skobelev@gmail.com> - 2013-12-19 01:00 -0800
Re: What about code blocks (not Forth blocks)? Alexander Skobelev <al.skobelev@gmail.com> - 2013-12-19 02:47 -0800
Re: What about code blocks (not Forth blocks)? Gerry Jackson <gerry@jackson9000.fsnet.co.uk> - 2013-12-19 11:23 +0000
Re: What about code blocks (not Forth blocks)? Alexander Skobelev <al.skobelev@gmail.com> - 2013-12-19 03:52 -0800
Re: What about code blocks (not Forth blocks)? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-12-19 15:58 +0000
Re: What about code blocks (not Forth blocks)? Paul Rubin <no.email@nospam.invalid> - 2013-12-19 10:05 -0800
Re: What about code blocks (not Forth blocks)? "Alex McDonald" <blog@rivadpm.com> - 2013-12-19 20:07 +0000
Re: What about code blocks (not Forth blocks)? Paul Rubin <no.email@nospam.invalid> - 2013-12-19 12:33 -0800
Re: What about code blocks (not Forth blocks)? "Alex McDonald" <blog@rivadpm.com> - 2013-12-19 20:33 +0000
Re: What about code blocks (not Forth blocks)? albert@spenarnc.xs4all.nl (Albert van der Horst) - 2013-12-19 20:52 +0000
Re: What about code blocks (not Forth blocks)? Paul Rubin <no.email@nospam.invalid> - 2013-12-19 18:52 -0800
Re: What about code blocks (not Forth blocks)? Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-12-28 12:52 -0600
Re: What about code blocks (not Forth blocks)? Paul Rubin <no.email@nospam.invalid> - 2013-12-28 11:47 -0800
Re: What about code blocks (not Forth blocks)? Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-12-29 07:39 -0600
Re: What about code blocks (not Forth blocks)? Paul Rubin <no.email@nospam.invalid> - 2013-12-29 08:11 -0800
Re: What about code blocks (not Forth blocks)? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-12-29 15:25 +0000
Re: What about code blocks (not Forth blocks)? Paul Rubin <no.email@nospam.invalid> - 2013-12-29 08:15 -0800
Re: What about code blocks (not Forth blocks)? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-12-29 16:03 +0000
Re: What about code blocks (not Forth blocks)? Gerry Jackson <gerry@jackson9000.fsnet.co.uk> - 2013-12-29 20:54 +0000
Re: What about code blocks (not Forth blocks)? mhx@iae.nl - 2013-12-29 13:38 -0800
Re: What about code blocks (not Forth blocks)? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-12-30 17:04 +0000
Re: What about code blocks (not Forth blocks)? Gerry Jackson <gerry@jackson9000.fsnet.co.uk> - 2013-12-30 20:05 +0000
Re: What about code blocks (not Forth blocks)? Paul Rubin <no.email@nospam.invalid> - 2013-12-30 16:49 -0800
Re: What about code blocks (not Forth blocks)? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2014-01-02 17:27 +0000
Re: What about code blocks (not Forth blocks)? Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-12-29 16:40 -0600
Re: What about code blocks (not Forth blocks)? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-12-30 16:51 +0000
Re: What about code blocks (not Forth blocks)? Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-12-30 11:15 -0600
Re: What about code blocks (not Forth blocks)? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-12-30 17:37 +0000
Re: What about code blocks (not Forth blocks)? Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-12-30 12:07 -0600
Re: What about code blocks (not Forth blocks)? "Alex McDonald" <blog@rivadpm.com> - 2013-12-20 13:50 +0000
Re: What about code blocks (not Forth blocks)? hughaguilar96@yahoo.com - 2013-12-19 21:49 -0800
Re: What about code blocks (not Forth blocks)? "Alex McDonald" <blog@rivadpm.com> - 2013-12-20 08:56 +0000
Re: What about code blocks (not Forth blocks)? hughaguilar96@yahoo.com - 2014-04-03 19:13 -0700
Re: What about code blocks (not Forth blocks)? "WJ" <w_a_x_man@yahoo.com> - 2014-03-11 05:35 +0000
Re: What about code blocks (not Forth blocks)? Bernd Paysan <bernd.paysan@gmx.de> - 2014-03-11 12:59 +0100
Re: What about code blocks (not Forth blocks)? hughaguilar96@yahoo.com - 2014-03-11 23:44 -0700
Re: What about code blocks (not Forth blocks)? Julian Fondren <ayrnieu@gmail.com> - 2014-03-12 11:48 -0700
Re: What about code blocks (not Forth blocks)? Bernd Paysan <bernd.paysan@gmx.de> - 2014-03-12 20:21 +0100
Re: What about code blocks (not Forth blocks)? hughaguilar96@yahoo.com - 2014-03-12 23:35 -0700
Re: What about code blocks (not Forth blocks)? "Alex McDonald" <blog@rivadpm.com> - 2014-03-14 14:25 +0000
Re: What about code blocks (not Forth blocks)? Bernd Paysan <bernd.paysan@gmx.de> - 2014-03-14 16:36 +0100
Re: What about code blocks (not Forth blocks)? mhx@iae.nl - 2014-03-14 11:27 -0700
Re: What about code blocks (not Forth blocks)? hughaguilar96@yahoo.com - 2014-03-16 17:38 -0700
Re: What about code blocks (not Forth blocks)? "Rod Pemberton" <dont_use_email@xnothavet.cqm> - 2014-03-17 03:35 -0400
Re: What about code blocks (not Forth blocks)? Paul Rubin <no.email@nospam.invalid> - 2014-03-17 20:36 -0700
Re: What about code blocks (not Forth blocks)? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2014-03-18 13:13 +0000
Re: What about code blocks (not Forth blocks)? albert@spenarnc.xs4all.nl (Albert van der Horst) - 2014-03-18 14:28 +0000
Re: What about code blocks (not Forth blocks)? Paul Rubin <no.email@nospam.invalid> - 2014-03-18 10:10 -0700
Re: What about code blocks (not Forth blocks)? Paul Rubin <no.email@nospam.invalid> - 2014-03-25 12:54 -0700
Re: What about code blocks (not Forth blocks)? hughaguilar96@yahoo.com - 2014-03-25 23:09 -0700
Re: What about code blocks (not Forth blocks)? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2014-03-26 13:49 +0000
Re: What about code blocks (not Forth blocks)? Bernd Paysan <bernd.paysan@gmx.de> - 2014-03-26 22:07 +0100
Re: What about code blocks (not Forth blocks)? hughaguilar96@yahoo.com - 2014-03-20 22:11 -0700
Re: What about code blocks (not Forth blocks)? hughaguilar96@yahoo.com - 2014-03-28 22:18 -0700
Re: What about code blocks (not Forth blocks)? "Alex McDonald" <blog@rivadpm.com> - 2014-03-29 10:57 +0000
Re: What about code blocks (not Forth blocks)? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2014-03-13 16:42 +0000
Re: What about code blocks (not Forth blocks)? albert@spenarnc.xs4all.nl (Albert van der Horst) - 2014-03-11 12:51 +0000
Re: What about code blocks (not Forth blocks)? "Alex McDonald" <blog@rivadpm.com> - 2014-03-11 14:54 +0000
Re: What about code blocks (not Forth blocks)? Alexander Skobelev <al.skobelev@gmail.com> - 2013-12-19 21:36 -0800
Re: What about code blocks (not Forth blocks)? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-12-20 16:56 +0000
Re: What about code blocks (not Forth blocks)? Alexander Skobelev <al.skobelev@gmail.com> - 2013-12-19 23:24 -0800
Re: What about code blocks (not Forth blocks)? mhx@iae.nl - 2013-12-20 02:05 -0800
Re: What about code blocks (not Forth blocks)? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-12-20 12:41 +0000
Re: What about code blocks (not Forth blocks)? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-12-20 17:46 +0000
Re: What about code blocks (not Forth blocks)? Alexander Skobelev <al.skobelev@gmail.com> - 2013-12-21 08:11 -0800
Re: What about code blocks (not Forth blocks)? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-12-23 10:07 +0000
Re: What about code blocks (not Forth blocks)? Bernd Paysan <bernd.paysan@gmx.de> - 2013-12-23 19:31 +0100
Re: What about code blocks (not Forth blocks)? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-12-26 17:45 +0000
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