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Commitbaf7c93

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Define unconstify() and unvolatize() for C++.
These two macros wouldn't work if used in an inline function definitionin a header seen by g++, because __builtin_types_compatible_p is onlyavailable in C. Redirect to standard C++ const_cast (which alsoadds/removes volatile despite its name).Per cpluspluscheck failure in a development branch.Suggested-by: Peter Eisentraut <peter@eisentraut.org>Discussion:https://postgr.es/m/CA%2BhUKGK3OXFjkOyZiw-DgL2bUqk9by1uGuCnViJX786W%2BfyDSw%40mail.gmail.com
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‎src/include/c.h

Lines changed: 4 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1245,7 +1245,10 @@ typedef union PGAlignedXLogBlock
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* Note that this only works in function scope, not for global variables (it'd
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* be nice, but not trivial, to improve that).
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*/
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#if defined(HAVE__BUILTIN_TYPES_COMPATIBLE_P)
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#if defined(__cplusplus)
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#defineunconstify(underlying_type,expr) const_cast<underlying_type>(expr)
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#defineunvolatize(underlying_type,expr) const_cast<underlying_type>(expr)
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#elif defined(HAVE__BUILTIN_TYPES_COMPATIBLE_P)
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#defineunconstify(underlying_type,expr) \
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(StaticAssertExpr(__builtin_types_compatible_p(__typeof(expr), const underlying_type), \
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"wrong cast"), \

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