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Add a pre-C++11 constexpr compatibility macro.

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Needed for cases where something should be constexpr if possible, but
not being constexpr is fine if in pre-C++11 code (such as a const
static float member variable).

Bug: 18466763
Change-Id: I635d062575ba2fbc4cbe3a89f730128c404d95e1
This commit is contained in:
Dan Albert 2014-11-20 10:47:55 -08:00
parent 606bb5f2e5
commit e4c649c9fc
1 changed files with 11 additions and 0 deletions
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11
include/utils/Compat.h
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@ -43,6 +43,17 @@ static inline ssize_t pread64(int fd, void* buf, size_t nbytes, off64_t offset)
# define ZD_TYPE long
#endif
/*
* Needed for cases where something should be constexpr if possible, but not
* being constexpr is fine if in pre-C++11 code (such as a const static float
* member variable).
*/
#if __cplusplus >= 201103L
#define CONSTEXPR constexpr
#else
#define CONSTEXPR
#endif
/*
* TEMP_FAILURE_RETRY is defined by some, but not all, versions of
* <unistd.h>. (Alas, it is not as standard as we'd hoped!) So, if it's