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#  std::  default_initializable

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[ same_as  ](/w/cpp/concepts/same_as "cpp/concepts/same as")  
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to")  
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"cpp/concepts/common reference with")  
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[ integral  ](/w/cpp/concepts/integral "cpp/concepts/integral")  
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integral")  
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point")  
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** default_initializable  **  
[ move_constructible  ](/w/cpp/concepts/move_constructible "cpp/concepts/move
constructible")  
[ copy_constructible  ](/w/cpp/concepts/copy_constructible "cpp/concepts/copy
construc