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src: apply clang-tidy rule bugprone-incorrect-roundings #26885

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merged 1 commit into from
Apr 3, 2019
Merged

src: apply clang-tidy rule bugprone-incorrect-roundings #26885

merged 1 commit into from
Apr 3, 2019

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see https://clang.llvm.org/extra/clang-tidy/checks/bugprone-incorrect-roundings.html.

Checks the usage of patterns known to produce incorrect rounding. Programmers often use:

(int)(double_expression + 0.5)
to round the double expression to an integer. The problem with this:

It is unnecessarily slow.
It is incorrect. The number 0.499999975 (smallest representable float number below 0.5) rounds to 1.0. Even worse behavior for negative numbers where both -0.5f and -1.4f both round to 0.0.

Checklist
  • make -j4 test (UNIX), or vcbuild test (Windows) passes
  • commit message follows commit guidelines

@nodejs-github-bot nodejs-github-bot added the c++ Issues and PRs that require attention from people who are familiar with C++. label Mar 24, 2019
mscdex
mscdex reviewed Mar 24, 2019
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refack
refack suggested changes Mar 25, 2019
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@BridgeAR BridgeAR requested a review from refack April 3, 2019 02:06
refack
refack suggested changes Apr 3, 2019
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@gengjiawen gengjiawen force-pushed the bugprone-incorrect-roundings branch from 9ce6d45 to eea7aab Compare April 3, 2019 13:11
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CI: https://ci.nodejs.org/job/node-test-pull-request/22166/

@gengjiawen @refack
src: apply clang-tidy rule bugprone-incorrect-roundings
d711b97 
PR-URL: nodejs#26885
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Minwoo Jung <minwoo@nodesource.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>
@refack refack force-pushed the bugprone-incorrect-roundings branch from eea7aab to d711b97 Compare April 3, 2019 16:20
@refack refack merged commit d711b97 into nodejs:master Apr 3, 2019
@gengjiawen gengjiawen deleted the bugprone-incorrect-roundings branch April 3, 2019 16:41
BethGriggs pushed a commit that referenced this pull request Apr 4, 2019
@gengjiawen @BethGriggs
src: apply clang-tidy rule bugprone-incorrect-roundings
49337b0 
PR-URL: #26885
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Minwoo Jung <minwoo@nodesource.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>
BethGriggs pushed a commit that referenced this pull request Apr 9, 2019
@gengjiawen @BethGriggs
src: apply clang-tidy rule bugprone-incorrect-roundings
c537daf 
PR-URL: #26885
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Minwoo Jung <minwoo@nodesource.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>
Signed-off-by: Beth Griggs <Bethany.Griggs@uk.ibm.com>
@BethGriggs BethGriggs mentioned this pull request Apr 9, 2019
Merged
BethGriggs pushed a commit that referenced this pull request Apr 10, 2019
@gengjiawen @BethGriggs
src: apply clang-tidy rule bugprone-incorrect-roundings
438bc52 
PR-URL: #26885
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Minwoo Jung <minwoo@nodesource.com>
Reviewed-By: Refael Ackermann <refack@gmail.com>
Signed-off-by: Beth Griggs <Bethany.Griggs@uk.ibm.com>
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@mscdex mscdex mscdex left review comments

@JungMinu JungMinu JungMinu approved these changes

@jasnell jasnell jasnell approved these changes

@refack refack refack approved these changes

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