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32 lines
1.2 KiB
32 lines
1.2 KiB
'use strict'; |
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var copy = require('es5-ext/object/copy') |
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, normalizeOptions = require('es5-ext/object/normalize-options') |
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, ensureCallable = require('es5-ext/object/valid-callable') |
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, map = require('es5-ext/object/map') |
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, callable = require('es5-ext/object/valid-callable') |
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, validValue = require('es5-ext/object/valid-value') |
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, bind = Function.prototype.bind, defineProperty = Object.defineProperty |
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, hasOwnProperty = Object.prototype.hasOwnProperty |
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, define; |
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define = function (name, desc, options) { |
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var value = validValue(desc) && callable(desc.value), dgs; |
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dgs = copy(desc); |
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delete dgs.writable; |
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delete dgs.value; |
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dgs.get = function () { |
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if (!options.overwriteDefinition && hasOwnProperty.call(this, name)) return value; |
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desc.value = bind.call(value, options.resolveContext ? options.resolveContext(this) : this); |
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defineProperty(this, name, desc); |
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return this[name]; |
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}; |
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return dgs; |
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}; |
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module.exports = function (props/*, options*/) { |
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var options = normalizeOptions(arguments[1]); |
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if (options.resolveContext != null) ensureCallable(options.resolveContext); |
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return map(props, function (desc, name) { return define(name, desc, options); }); |
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};
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