diff options
Diffstat (limited to 'node_modules/core-js/library/modules/_iter-define.js')
| -rw-r--r-- | node_modules/core-js/library/modules/_iter-define.js | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/node_modules/core-js/library/modules/_iter-define.js b/node_modules/core-js/library/modules/_iter-define.js new file mode 100644 index 000000000..f72a50214 --- /dev/null +++ b/node_modules/core-js/library/modules/_iter-define.js @@ -0,0 +1,70 @@ +'use strict'; +var LIBRARY = require('./_library') + , $export = require('./_export') + , redefine = require('./_redefine') + , hide = require('./_hide') + , has = require('./_has') + , Iterators = require('./_iterators') + , $iterCreate = require('./_iter-create') + , setToStringTag = require('./_set-to-string-tag') + , getPrototypeOf = require('./_object-gpo') + , ITERATOR = require('./_wks')('iterator') + , BUGGY = !([].keys && 'next' in [].keys()) // Safari has buggy iterators w/o `next` + , FF_ITERATOR = '@@iterator' + , KEYS = 'keys' + , VALUES = 'values'; + +var returnThis = function(){ return this; }; + +module.exports = function(Base, NAME, Constructor, next, DEFAULT, IS_SET, FORCED){ + $iterCreate(Constructor, NAME, next); + var getMethod = function(kind){ + if(!BUGGY && kind in proto)return proto[kind]; + switch(kind){ + case KEYS: return function keys(){ return new Constructor(this, kind); }; + case VALUES: return function values(){ return new Constructor(this, kind); }; + } return function entries(){ return new Constructor(this, kind); }; + }; + var TAG = NAME + ' Iterator' + , DEF_VALUES = DEFAULT == VALUES + , VALUES_BUG = false + , proto = Base.prototype + , $native = proto[ITERATOR] || proto[FF_ITERATOR] || DEFAULT && proto[DEFAULT] + , $default = $native || getMethod(DEFAULT) + , $entries = DEFAULT ? !DEF_VALUES ? $default : getMethod('entries') : undefined + , $anyNative = NAME == 'Array' ? proto.entries || $native : $native + , methods, key, IteratorPrototype; + // Fix native + if($anyNative){ + IteratorPrototype = getPrototypeOf($anyNative.call(new Base)); + if(IteratorPrototype !== Object.prototype){ + // Set @@toStringTag to native iterators + setToStringTag(IteratorPrototype, TAG, true); + // fix for some old engines + if(!LIBRARY && !has(IteratorPrototype, ITERATOR))hide(IteratorPrototype, ITERATOR, returnThis); + } + } + // fix Array#{values, @@iterator}.name in V8 / FF + if(DEF_VALUES && $native && $native.name !== VALUES){ + VALUES_BUG = true; + $default = function values(){ return $native.call(this); }; + } + // Define iterator + if((!LIBRARY || FORCED) && (BUGGY || VALUES_BUG || !proto[ITERATOR])){ + hide(proto, ITERATOR, $default); + } + // Plug for library + Iterators[NAME] = $default; + Iterators[TAG] = returnThis; + if(DEFAULT){ + methods = { + values: DEF_VALUES ? $default : getMethod(VALUES), + keys: IS_SET ? $default : getMethod(KEYS), + entries: $entries + }; + if(FORCED)for(key in methods){ + if(!(key in proto))redefine(proto, key, methods[key]); + } else $export($export.P + $export.F * (BUGGY || VALUES_BUG), NAME, methods); + } + return methods; +};
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