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        A type X meets the Endpoint requirements if it
        satisfies the requirements of Destructible (C++Std [destructible]),
        DefaultConstructible (C++Std [defaultconstructible]), CopyConstructible
        (C++Std [copyconstructible]), and CopyAssignable (C++Std [copyassignable]),
        as well as the additional requirements listed below.
      
        In the table below, a denotes a (possibly const) value of type
        X, and u denotes an identifier.
      
Table 10. Endpoint requirements
| expression | type | 
                  assertion/note | 
|---|---|---|
| 
                   | 
                  type meeting  | |
| 
                   | 
                   | 
        In the table below, a denotes a (possibly const) value of type
        X, b denotes a value of type X, and
        s denotes a (possibly const) value of a type that is convertible
        to size_t and denotes a size in bytes.
      
Table 11. Endpoint requirements for extensible implementations
| expression | type | 
                  assertion/note | 
|---|---|---|
| 
                   | 
                   | 
                  Returns a pointer suitable for passing as the address
                  argument to functions such as POSIX  | 
| 
                   | 
                   | 
                  Returns a pointer suitable for passing as the address
                  argument to functions such as POSIX  | 
| 
                   | 
                   | 
                  Returns a value suitable for passing as the address_len
                  argument to functions such as POSIX  | 
| 
                   | 
                  pre:  | |
| 
                   | 
                   | 
                  Returns a value suitable for passing as the address_len
                  argument to functions such as POSIX  |