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node_modules/unbox-primitive/index.js

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+'use strict';
+
+var whichBoxedPrimitive = require('which-boxed-primitive');
+var bind = require('function-bind');
+var hasSymbols = require('has-symbols')();
+var hasBigInts = require('has-bigints')();
+
+var stringToString = bind.call(Function.call, String.prototype.toString);
+var numberValueOf = bind.call(Function.call, Number.prototype.valueOf);
+var booleanValueOf = bind.call(Function.call, Boolean.prototype.valueOf);
+var symbolValueOf = hasSymbols && bind.call(Function.call, Symbol.prototype.valueOf);
+var bigIntValueOf = hasBigInts && bind.call(Function.call, BigInt.prototype.valueOf);
+
+module.exports = function unboxPrimitive(value) {
+	var which = whichBoxedPrimitive(value);
+	if (typeof which !== 'string') {
+		throw new TypeError(which === null ? 'value is an unboxed primitive' : 'value is a non-boxed-primitive object');
+	}
+
+	if (which === 'String') {
+		return stringToString(value);
+	}
+	if (which === 'Number') {
+		return numberValueOf(value);
+	}
+	if (which === 'Boolean') {
+		return booleanValueOf(value);
+	}
+	if (which === 'Symbol') {
+		if (!hasSymbols) {
+			throw new EvalError('somehow this environment does not have Symbols, but you have a boxed Symbol value. Please report this!');
+		}
+		return symbolValueOf(value);
+	}
+	if (which === 'BigInt') {
+		return bigIntValueOf(value);
+	}
+	throw new RangeError('unknown boxed primitive found: ' + which);
+};