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===Generator Frames=== | ===Generator Frames=== | ||
SpiderMonkey supports generator-iterator objects, which produce a series of values by repeatedly suspending the execution of a function or expression. For example, calling a function that uses <code>yield</code> produces a generator-iterator object, as does evaluating a generator expression. | SpiderMonkey supports generator-iterator objects, which produce a series of values by repeatedly suspending the execution of a function or expression. For example, calling a function that uses <code>yield</code> produces a generator-iterator object, as does evaluating a generator expression like <code>(i*i for each (i in [1,2,3]))</code>. | ||
A generator-iterator object refers to a stack frame with no fixed continuation frame. While the generator's code is running, its continuation is whatever frame called its <code>next</code> method; while the generator is suspended, it has no particular continuation frame; and when it resumes again, the continuation frame for that resumption could be different from that of the previous resumption. | A generator-iterator object refers to a stack frame with no fixed continuation frame. While the generator's code is running, its continuation is whatever frame called its <code>next</code> method; while the generator is suspended, it has no particular continuation frame; and when it resumes again, the continuation frame for that resumption could be different from that of the previous resumption. | ||