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What is "underlying type" for wchar_t?

How is the underlying type decided in/(by the) a system for wchar_t? How will the system decide, this has to be the size of an int or short int etc.?
Feb 21 '13 #1
3 1666
weaknessforcats
9,208 Expert Mod 8TB
unsigned short.

However, it is implementaton dependent and could e something else so long as the something else is the width of two char.
Feb 21 '13 #2
Thanks weaknessforcats
Feb 21 '13 #3
donbock
2,426 Expert 2GB
In section 7.18 (stdint.h) the C99 Standard says:
If wchar_t (see 7.17) is defined as a signed integer type, the value of WCHAR_MIN shall be no greater than −127 and the value of WCHAR_MAX shall be no less than 127; otherwise, wchar_t is defined as an unsigned integer type, and the value of WCHAR_MIN shall be 0 and the value of WCHAR_MAX shall be no less than 255. (219)
(219) The values WCHAR_MIN and WCHAR_MAX do not necessarily correspond to members of the extended character set.
Implementations are allowed to use larger types than the minimum. I'm not aware of any that don't in fact use a larger type.
Feb 21 '13 #4

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