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LibJS: Implement Iterator.from and the WrapForValidIteratorPrototype

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Iterator.from creates an Iterator from either an existing iterator or
an iterator-like object. In the latter case, it sets the prototype of
the returned iterator to WrapForValidIteratorPrototype to wrap around
the iterator-like object's iteration methods.
This commit is contained in:
Timothy Flynn 2023-06-24 11:27:30 -04:00 • committed by Andreas Kling
parent 5736b53013
commit d9d245faa7
11 changed files with 299 additions and 0 deletions
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2
Userland/Libraries/LibJS/Runtime/Intrinsics.h
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@ -29,6 +29,7 @@ public:
NonnullGCPtr<Object> async_from_sync_iterator_prototype() { return *m_async_from_sync_iterator_prototype; }
NonnullGCPtr<Object> async_generator_prototype() { return *m_async_generator_prototype; }
NonnullGCPtr<Object> generator_prototype() { return *m_generator_prototype; }
NonnullGCPtr<Object> wrap_for_valid_iterator_prototype() { return *m_wrap_for_valid_iterator_prototype; }
// Alias for the AsyncGenerator Prototype Object used by the spec (%AsyncGeneratorFunction.prototype.prototype%)
NonnullGCPtr<Object> async_generator_function_prototype_prototype() { return *m_async_generator_prototype; }
@ -128,6 +129,7 @@ private:
GCPtr<Object> m_async_from_sync_iterator_prototype;
GCPtr<Object> m_async_generator_prototype;
GCPtr<Object> m_generator_prototype;
GCPtr<Object> m_wrap_for_valid_iterator_prototype;
// Not included in JS_ENUMERATE_INTL_OBJECTS due to missing distinct constructor
GCPtr<Object> m_intl_segments_prototype;