72b037275f
git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@1288 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
147 lines
2.8 KiB
Plaintext
147 lines
2.8 KiB
Plaintext
=================================================================
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Logtalk - Object oriented extension to Prolog
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Release 2.25.0
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Copyright (c) 1998-2005 Paulo Moura. All Rights Reserved.
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=================================================================
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% start by loading the example:
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| ?- logtalk_load(dcgs(loader)).
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...
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% DCG rules implementing a simple calculator:
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| ?- calculator::parse("1+2-3*4", Result).
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Result = -9
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yes
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% recognizing gramatically correct sentences:
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| ?- sentence::parse([the, girl, likes, the, boy], Result).
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Result = true
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yes
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| ?- sentence::parse([the, girl, scares, the, boy], Result).
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Result = false
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yes
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% generating parse trees for sentences:
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| ?- parsetree::parse([the, girl, likes, the, boy], Tree).
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Tree = s(np(d(the), n(girl)), vp(v(likes), np(d(the), n(boy))))
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yes
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% bill of materials example:
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| ?- bom::parts(bike, L).
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L = [frame, crank, pedal, pedal, chain, spokes, rim, hub, spokes, rim, hub]
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yes
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| ?- bom::parts(wheel, L).
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L = [spokes, rim, hub]
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yes
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% parsing command-line shell input:
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| ?- shell::parse("pwd; cd ..; ls -a", L).
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L = [pwd,'cd ..','ls -a'] ?
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yes
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% walker movements:
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| ?- walker::walk([n(5), e(4), s(2), nw(8), s(5), se(1), n(4)], Ending).
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Ending = -0.94974746830583223,6.9497474683058318 ?
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yes
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% conversion between compound terms and XML:
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| ?- xml::convert(word(child, children), word(singular, plural), XML).
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XML = '<word><singular>child</singular><plural>children</plural></word>'
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yes
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| ?- xml::convert(Term, Interpretation, '<word><singular>child</singular><plural>children</plural></word>').
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Term = word(child, children)
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Interpretation = word(singular, plural)
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yes
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% parsing URLs:
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| ?- url::parse("http://www.logtalk.org", Components).
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Components = [protocol(http), address([www, logtalk, org]), path([]), file('')]
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yes
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| ?- url::parse("http://www.logtalk.org/", Components).
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Components = [protocol(http), address([www, logtalk, org]), path(['']), file('')]
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yes
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| ?- url::parse("http://www.logtalk.org/cvs", Components).
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Components = [protocol(http), address([www, logtalk, org]), path([cvs]), file('')]
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yes
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| ?- url::parse("http://www.logtalk.org/cvs.html", Components).
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Components = [protocol(http), address([www, logtalk, org]), path([]), file('cvs.html')]
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yes
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| ?- url::parse("http://193.136.64.5/files/update", Components).
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Components = [protocol(http), address([193, 136, 64, 5]), path([files, update]), file('')]
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yes
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% command language example:
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| ?- faa::main.
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Fly Amzi! Air
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enter command> list flights
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aa101
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aa102
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aa103
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enter command> book elana aa102
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enter command> book tom aa102
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enter command> list passengers aa102
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elana
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tom
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enter command> exit
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yes
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% double bypass using the {}/1 control constructs of grammar rules and Logtalk:
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| ?- bypass::phrase(foo, _, _).
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bar predicate called
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yes
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% run the Logtalk DCG translator on the test cases:
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| ?- dcgtest::run.
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...
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