Glen Whitney
27fa4b0193
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This PR adds a boolean section, as well as an isNaN predicate on numbers. In a TypeDispatcher, when BooleanT is present, isNaN returns a BooleanT. However, in a numbers-only TypeDispatcher, it returns 1 or 0 instead. Moreover, when booleans are subsequently added to a numbers-only instance, isNaN properly reconfigures itself to return BooleanT. No predicates that depend on approximate equality testing or a configuration object are implemented in this PR. This PR also implements type matching and dispatching with implicit conversions, and adds an implicit conversion from BooleanT to NumberT. Reviewed-on: #17 Co-authored-by: Glen Whitney <glen@studioinfinity.org> Co-committed-by: Glen Whitney <glen@studioinfinity.org>
12 lines
303 B
JavaScript
12 lines
303 B
JavaScript
import {plain, boolnum} from './helpers.js'
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import {BooleanT} from '#boolean/BooleanT.js'
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import {Returns} from '#core/Type.js'
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import {NumberT} from '#number/NumberT.js'
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const num = f => Returns(NumberT, f)
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export const number = plain(a => a)
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number.also(
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BooleanT, boolnum,
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[], num(() => 0)
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)
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