Re: immediate strings #2

[Stefan Monnier <monnier@IRO.UMontreal.CA>]

> struct Data_Lisp_String
>   {
>     unsigned int immediate_bit : 1;
>     signed int : IMMEDIATE_STRING_LENGTH_BITS; /* padding for immediate size */
>     unsigned int gcmarkbit : 1;
>     signed int : IMMEDIATE_STRING_LENGTH_BITS; /* and for immediate size_byte */
>     INTERVAL intervals;
>     ptrdiff_t size;
>     ptrdiff_t size_byte;
>     unsigned char *data;
>   };

Why?  IIUC that sums up to 5x32bit, which will break the "multiple of
8 alignment" rule and hence will need to be be rounded up to 6x32bit,
for an overall  increase of 50% in the size of struct Lisp_String.
I.e. a non-starter.  There are bits available in size and size_byte, we
have to use those (like we currently do with gcmarkbit in `size').


        Stefan