Re: [Boost-users] [numeric_cast] Warning with MSVC

On Thu, 16 Jul 2009 11:18:26 -0500, Zachary Turner wrote:

On Thu, Jul 16, 2009 at 8:29 AM, Andrew Holden wrote:

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Alexander Lamaison wrote: Sent: Thursday, July 16, 2009 6:09 AM

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MSVC still gives me a warning about possible loss of data:

 c:\program files\boost\boost_1_38\boost\numeric\conversion\  cast.hpp(41) : warning C4267: 'argument' : conversion from 'size_t'  to 'unsigned int', possible loss of data

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The issue is a compiler option called "detect 64-bit portability issues" or "/Wp64".  As it is both non-standard and a rather brutal hack, there is probably no way for Boost to support it.

I would recommend turning that option off.

For what it's worth, this compiler option is deprecated in recent versions of MSVC, so that adds one more to the list of reasons to disable the option.

Not the first time this flag has given me trouble. I one had "conversion from 'size_t' to 'size_t', possible loss of data". Mint. Turning it off immediately. Alex