Class <anonymous struct>
   size=8 align=4
   base size=8 base align=4
<anonymous struct> (0x0x7f6b722d4c00) 0

Class <anonymous struct>::<anonymous union>
   size=4 align=4
   base size=4 base align=4
<anonymous struct>::<anonymous union> (0x0x7f6b722d4cc0) 0

Class <anonymous struct>
   size=8 align=4
   base size=8 base align=4
<anonymous struct> (0x0x7f6b722d4c60) 0

Class <anonymous struct>
   size=12 align=4
   base size=12 base align=4
<anonymous struct> (0x0x7f6b722d4d20) 0

Class <anonymous struct>
   size=16 align=8
   base size=16 base align=8
<anonymous struct> (0x0x7f6b722d4d80) 0

Class _IO_marker
   size=12 align=4
   base size=12 base align=4
_IO_marker (0x0x7f6b722d4de0) 0

Class _IO_FILE
   size=152 align=8
   base size=152 base align=8
_IO_FILE (0x0x7f6b722d4e40) 0

Class <anonymous struct>
   size=16 align=4
   base size=16 base align=4
<anonymous struct> (0x0x7f6b722d4ea0) 0

Vtable for OutputStream
OutputStream::_ZTV12OutputStream: 8u entries
0     (int (*)(...))0
4     (int (*)(...))(& _ZTI12OutputStream)
8     0u
12    0u
16    (int (*)(...))__cxa_pure_virtual
20    (int (*)(...))__cxa_pure_virtual
24    (int (*)(...))__cxa_pure_virtual
28    (int (*)(...))__cxa_pure_virtual

Class OutputStream
   size=4 align=4
   base size=4 base align=4
OutputStream (0x0x7f6b723880c0) 0 nearly-empty
    vptr=((& OutputStream::_ZTV12OutputStream) + 8u)

Class write_le_alias(OutputStream*, T) [with T = float; AliasT = unsigned int]::<anonymous union>
   size=4 align=4
   base size=4 base align=4
write_le_alias(OutputStream*, T) [with T = float; AliasT = unsigned int]::<anonymous union> (0x0x7f6b72388180) 0

Class write_le_alias(OutputStream*, T) [with T = double; AliasT = long long unsigned int]::<anonymous union>
   size=8 align=8
   base size=8 base align=8
write_le_alias(OutputStream*, T) [with T = double; AliasT = long long unsigned int]::<anonymous union> (0x0x7f6b723882a0) 0

