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51 lines
1.7 KiB
JavaScript
51 lines
1.7 KiB
JavaScript
var Map = require('./es6.map')
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, $export = require('./_export')
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, shared = require('./_shared')('metadata')
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, store = shared.store || (shared.store = new (require('./es6.weak-map')));
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var getOrCreateMetadataMap = function(target, targetKey, create){
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var targetMetadata = store.get(target);
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if(!targetMetadata){
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if(!create)return undefined;
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store.set(target, targetMetadata = new Map);
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}
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var keyMetadata = targetMetadata.get(targetKey);
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if(!keyMetadata){
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if(!create)return undefined;
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targetMetadata.set(targetKey, keyMetadata = new Map);
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} return keyMetadata;
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};
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var ordinaryHasOwnMetadata = function(MetadataKey, O, P){
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var metadataMap = getOrCreateMetadataMap(O, P, false);
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return metadataMap === undefined ? false : metadataMap.has(MetadataKey);
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};
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var ordinaryGetOwnMetadata = function(MetadataKey, O, P){
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var metadataMap = getOrCreateMetadataMap(O, P, false);
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return metadataMap === undefined ? undefined : metadataMap.get(MetadataKey);
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};
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var ordinaryDefineOwnMetadata = function(MetadataKey, MetadataValue, O, P){
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getOrCreateMetadataMap(O, P, true).set(MetadataKey, MetadataValue);
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};
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var ordinaryOwnMetadataKeys = function(target, targetKey){
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var metadataMap = getOrCreateMetadataMap(target, targetKey, false)
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, keys = [];
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if(metadataMap)metadataMap.forEach(function(_, key){ keys.push(key); });
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return keys;
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};
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var toMetaKey = function(it){
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return it === undefined || typeof it == 'symbol' ? it : String(it);
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};
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var exp = function(O){
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$export($export.S, 'Reflect', O);
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};
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module.exports = {
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store: store,
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map: getOrCreateMetadataMap,
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has: ordinaryHasOwnMetadata,
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get: ordinaryGetOwnMetadata,
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set: ordinaryDefineOwnMetadata,
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keys: ordinaryOwnMetadataKeys,
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key: toMetaKey,
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exp: exp
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}; |