yield in Crystal is a very simple version of effects, since it will only allow jumping up one layer in the call stack, if you want to forward a block you need to re-yield when you call another function. There’s also only one possible receiver, the single block passed to the function will be used for all yield statements.
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。关于这个话题，clash下载提供了深入分析
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Акция протеста прошла у посольства Украины в стране ЕС20:39