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Re: folding STRING_CST + INTEGER_CST
On Mon, Jun 24, 2002 at 08:23:06PM -0700, Aldy Hernandez wrote:
>
> > We'd need to ensure that "hello"+3 != "HELlo"+3 (while still having "lo"
> > == "lo"), as well as that (("hello"+3)-3) == "hello", and so on.
>
> ahhhh!
>
> another alternative is to fold STRING_CST+INTEGER_CST when we are
> building the trees for certain builtins accepting "const char *".
> the following come to mind:
>
> strspn, strstr, strcspn, strrchr, strchr, index, fputs
>
> ...since we know we don't need equality operations on them.
Isn't it guaranteed that: strstr("hello"+3, "lo") != "lo" ?
-Tim