On 9/28/20 11:34 AM, Marek Polacek wrote:
On Fri, Sep 25, 2020 at 04:31:16PM -0600, Martin Sebor wrote:
On 9/24/20 6:05 PM, Marek Polacek via Gcc-patches wrote:
This new warning can be used to prevent expensive copies inside range-based
for-loops, for instance:
struct S { char arr[128]; };
On Fri, Sep 25, 2020 at 04:31:16PM -0600, Martin Sebor wrote:
> On 9/24/20 6:05 PM, Marek Polacek via Gcc-patches wrote:
> > This new warning can be used to prevent expensive copies inside range-based
> > for-loops, for instance:
> >
> >struct S { char arr[128]; };
> >void fn () {
> >
On 9/24/20 6:05 PM, Marek Polacek via Gcc-patches wrote:
This new warning can be used to prevent expensive copies inside range-based
for-loops, for instance:
struct S { char arr[128]; };
void fn () {
S arr[5];
for (const auto x : arr) { }
}
where auto deduces to S and then w
On 9/24/20 8:05 PM, Marek Polacek wrote:
This new warning can be used to prevent expensive copies inside range-based
for-loops, for instance:
struct S { char arr[128]; };
void fn () {
S arr[5];
for (const auto x : arr) { }
}
where auto deduces to S and then we copy the big S
