Glen Whitney
70ce01d12b
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Establishes a global config object for a TypeDispatcher instance, so far with just properties representing comparison tolerances. Begins a "relational" group of functions with basic approximate equality, and an initial primitive ordering comparison. Ensures that methods that depend on properties of `config` will be properly updated when those properties change. Reviewed-on: #19 Co-authored-by: Glen Whitney <glen@studioinfinity.org> Co-committed-by: Glen Whitney <glen@studioinfinity.org>
13 lines
436 B
JavaScript
13 lines
436 B
JavaScript
import {ReturnsAs} from './helpers.js'
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import {onType, ResolutionError} from '#core/helpers.js'
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import {Returns} from '#core/Type.js'
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import {Any} from "#core/TypePatterns.js"
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export const isZero = (math, [T]) => {
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if (!T) { // called with no arguments
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throw new ResolutionError('isZero() requires one argument')
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}
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const z = math.zero(T)
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const eq = math.equal.resolve([T, T])
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return ReturnsAs(eq, x => eq(z, x))
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}
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