Many thanks
I've filed a ticket, hope the warning can be enhanced.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92642
Jonny
On 23/11/2019 14:15, Ponnuvel Palaniyappan wrote:
The shift actually happens as int because the type of 1 is int, and
the result is then assigned to size_t. You can instead use a wider type:
size_t big = 1UL<<41;
On Sat, 23 Nov 2019, 13:56 Jonny Grant, <jg@xxxxxxxx
<mailto:jg@xxxxxxxx>> wrote:
I see on my 64bit Ubuntu PC that size_t is 8 bytes, that is 64bits,
however I see a warning:
$ g++-8 -Wall -Wextra -o size_t size_t.cpp
size_t.cpp: In function ‘int main()’:
size_t.cpp:11:21: warning: left shift count >= width of type
[-Wshift-count-overflow]
size_t big = 1<<40;
^~
Same on Godbolt trunk.
Is this an issue?
Regards, Jonny
https://godbolt.org/z/xeefQ8
#include <stdio.h>
size_t big = 1<<41;
Please keep my email on any replies
Jonny
