60 lines
1.2 KiB
JavaScript
60 lines
1.2 KiB
JavaScript
// bin/syndicatec compiler/demo-bad-this.js | node
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//
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// Bug with this-ness. Symptomatic output:
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//
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// + render one false
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// + render two false
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// present one
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// - render one false
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// - render two false
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// + render one one
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// + render two one
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//
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// Good output:
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//
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// + render one false
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// + render two false
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// present one
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// - render one false
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// + render one one
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var Syndicate = require('./src/main.js');
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assertion type user(who);
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assertion type present(who);
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assertion type rendered(who, isPresent);
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ground dataspace {
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spawn {
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assert user('one');
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assert present('one');
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}
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spawn {
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assert user('two');
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// assert present('two');
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}
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spawn {
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during user($who) {
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field this.isPresent = false;
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on asserted present(who) {
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console.log('present', who);
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this.isPresent = who;
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}
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on retracted present(who) {
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console.log('absent', who);
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this.isPresent = false;
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}
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assert rendered(who, this.isPresent);
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}
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}
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spawn {
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during rendered($who, $isPresent) {
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on start { console.log('+ render', who, isPresent); }
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on stop { console.log('- render', who, isPresent); }
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}
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}
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}
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