39 lines
850 B
JavaScript
39 lines
850 B
JavaScript
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module.exports = function enforce(type, value) {
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switch (type) {
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// http://jsperf.com/array-typecheck-2
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case 'Array': {
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if (value != null && value.constructor === Array) return
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break
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}
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// http://jsperf.com/boolean-typecheck
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case 'Boolean': {
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if (typeof value === 'boolean') return
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break
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}
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case 'Buffer': {
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if (Buffer.isBuffer(value)) return
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break
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}
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// http://jsperf.com/number-constructor-v-isnan
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case 'Number': {
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if (typeof value === 'number') return
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break
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}
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// http://jsperf.com/string-typecheck-2
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case 'String': {
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if (value != null && value.constructor === String) return
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break
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}
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default: {
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if (value instanceof type) return
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}
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}
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throw new TypeError('Expected ' + (type.name || type) + ', got ' + value)
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}
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