Re: [Boost-users] [Spirit] dereferencing type-punned pointer will break strict-aliasing rules

Subject: Re: [Boost-users] [Spirit] dereferencing type-punned pointer will break strict-aliasing rules
From: Frank Mori Hess (frank.hess_at_[hidden])
Date: 2010-08-12 14:37:09

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On Thursday 12 August 2010, Emil Dotchevski wrote:
> 2)
> strict aliasing rules should not apply to char pointers (as far as I
> can tell, in_buffer.data is of char type specifically to deal with
> this issue.)

It's safe to cast to a char pointer and use the char pointer, but in this case 
you are casting away from a char pointer.  Bouncing a non-char pointer 
through a char pointer doesn't give any relief from the usual strict aliasing 
rules.
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