Add strictly checked numeric types

Add strictly checked numeric types

StrictNumeric and strict_cast can be used for compile time
detection of numeric truncation errors at API boundaries.

Committed: https://crrev.com/4bf22c6d746526624b79f4c9d7b01ee5bfdbe3d3
Cr-Commit-Position: refs/heads/master@{#331725}

[jschuh, 2015-05-27 22:01:34]

jschuh@chromium.org changed reviewers:
+ tsepez@chromium.org

[jschuh, 2015-05-27 22:01:35]

PTAL

[jschuh, 2015-05-27 22:01:45]

The CQ bit was checked by jschuh@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2015-05-27 22:02:19]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1154543003/40001

[Tom Sepez, 2015-05-27 22:11:30]

lgtm

[jschuh, 2015-05-27 22:36:42]

The CQ bit was checked by jschuh@chromium.org

[jschuh, 2015-05-27 22:36:42]

The patchset sent to the CQ was uploaded after l-g-t-m from tsepez@chromium.org
Link to the patchset: https://codereview.chromium.org/1154543003/#ps60001
(title: "test fix")

[commit-bot: I haz the power, 2015-05-27 22:37:55]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1154543003/60001

[rickyz (no longer on Chrome), 2015-05-27 22:50:53]

https://codereview.chromium.org/1154543003/diff/60001/base/numerics/safe_conv...
File base/numerics/safe_conversions.h (right):

https://codereview.chromium.org/1154543003/diff/60001/base/numerics/safe_conv...
base/numerics/safe_conversions.h:121: typedef StrictNumeric<size_t> SSizeT;
This name could potentially be confused with ssize_t (why does that exist again
:-()

[jschuh, 2015-05-27 23:04:51]

On 2015/05/27 22:50:53, rickyz wrote:
>
https://codereview.chromium.org/1154543003/diff/60001/base/numerics/safe_conv...
> File base/numerics/safe_conversions.h (right):
> 
>
https://codereview.chromium.org/1154543003/diff/60001/base/numerics/safe_conv...
> base/numerics/safe_conversions.h:121: typedef StrictNumeric<size_t> SSizeT;
> This name could potentially be confused with ssize_t (why does that exist
again
> :-()

Yeah, we had that discussion f2f. Neither of us could think of a better name,
but we're open to suggestions.

[jschuh, 2015-05-27 23:16:22]

The CQ bit was unchecked by jschuh@chromium.org

[jschuh, 2015-05-27 23:49:57]

On 2015/05/27 23:04:51, jschuh wrote:
> On 2015/05/27 22:50:53, rickyz wrote:
> >
>
https://codereview.chromium.org/1154543003/diff/60001/base/numerics/safe_conv...
> > File base/numerics/safe_conversions.h (right):
> > 
> >
>
https://codereview.chromium.org/1154543003/diff/60001/base/numerics/safe_conv...
> > base/numerics/safe_conversions.h:121: typedef StrictNumeric<size_t> SSizeT;
> > This name could potentially be confused with ssize_t (why does that exist
> again
> > :-()
> 
> Yeah, we had that discussion f2f. Neither of us could think of a better name,
> but we're open to suggestions.

Okay, the debate has awarded the win to SizeT.

[jschuh, 2015-05-27 23:50:01]

The CQ bit was checked by jschuh@chromium.org

[jschuh, 2015-05-27 23:50:02]

The patchset sent to the CQ was uploaded after l-g-t-m from tsepez@chromium.org
Link to the patchset: https://codereview.chromium.org/1154543003/#ps80001
(title: "CheckedNumeric ctor and SizeT rename")

[commit-bot: I haz the power, 2015-05-27 23:50:31]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1154543003/80001

[commit-bot: I haz the power, 2015-05-28 02:29:33]

Committed patchset #5 (id:80001)

[commit-bot: I haz the power, 2015-05-28 02:30:20]

Patchset 5 (id:??) landed as
https://crrev.com/4bf22c6d746526624b79f4c9d7b01ee5bfdbe3d3
Cr-Commit-Position: refs/heads/master@{#331725}