src: add incr/decr operators for Reference #19083

danbev · 2018-03-02T11:44:45Z

This commit adds operator overloads for increment/decrement to
AliasedBuffer::Reference.
The motivation for doing this is to hopefully make code that needs
to increment/decrement a little simpler.

Checklist

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

Affected core subsystem(s)

src

danbev · 2018-03-02T11:45:23Z

CI: https://ci.nodejs.org/job/node-test-pull-request/13444/

danbev · 2018-03-02T13:45:02Z

node-test-commit-windows-fanned failure looks unrelated

console output:

not ok 230 parallel/test-http2-https-fallback
  ---
  duration_ms: 0.264
  severity: fail
  stack: |-
    (node:3544) ExperimentalWarning: The http2 module is an experimental API.
    assert.js:243
        throw err;
        ^
    
    AssertionError [ERR_ASSERTION]: The expression evaluated to a falsy value:
    
      assert.ok(/Unknown ALPN Protocol, expected `h2` to be available/.test(text))
    
        at TLSSocket.tls.setEncoding.on.on.common.mustCall (c:\workspace\node-test-binary-windows\test\parallel\test-http2-https-fallback.js:143:9)
        at TLSSocket.<anonymous> (c:\workspace\node-test-binary-windows\test\common\index.js:467:15)
        at TLSSocket.emit (events.js:136:15)
        at endReadableNT (_stream_readable.js:1021:12)
        at process._tickCallback (internal/process/next_tick.js:115:19)
  ...

richardlau · 2018-03-02T17:32:04Z

node-test-commit-windows-fanned failure looks unrelated

      assert.ok(/Unknown ALPN Protocol, expected `h2` to be available/.test(text))
   
       at TLSSocket.tls.setEncoding.on.on.common.mustCall (c:\workspace\node-test-binary-windows\test\parallel\test-http2-https-fallback.js:143:9)

This assert was recently introduced in #18986
cc @addaleax

Update: being addressed by #19093.

TimothyGu · 2018-03-02T20:48:23Z

src/aliased_buffer.h

+    template <typename T>
+    inline Reference& operator-=(const T& val) {
+      const T current = aliased_buffer_->GetValue(index_);
+      aliased_buffer_->SetValue(index_, current - val);


Unless I’m missing something, you could just do operator+=(index_, -val) here. If you add an overload for the unary minus operator (or is that even necessary?), that should get rid of the overload below that takes in a const Reference&.

I'll take a closer look at your suggestion on Monday (little short of time right now). Thanks

@TimothyGu Please take a look and see if this was what you had in mind, thanks.

@TimothyGu If possible I'd like get this merged but it would be great if you could take a look at the latest change and see if this is what you had in mind. Thanks

addaleax

Awesome, thank you!

addaleax · 2018-03-02T21:40:55Z

src/aliased_buffer.h

+    }
+
+    inline Reference& operator-=(const Reference& val) {
+      this->operator-=(static_cast<NativeT>(val));


Just a suggestion, but I would personally find return *this -= static_cast<NativeT>(val); a bit clearer/more idiomatic in these places.

Ah yes, let me change that thanks!

danbev · 2018-03-05T13:38:24Z

CI: https://ci.nodejs.org/job/node-test-pull-request/13502/

addaleax

This is definitely still merge-able :)

TimothyGu · 2018-03-08T16:58:29Z

src/aliased_buffer.h

+
+    template <typename T>
+    inline Reference& operator-=(const T& val) {
+      return this->operator+=(-val);


Just making sure, this still works if val is a reference?

Would definitely be good to test for that.

This commit adds operator overloads for increment/decrement to AliasedBuffer::Reference. The motivation for doing this is to hopefully make code that needs to increment/decrement a little simpler.

danbev · 2018-03-09T06:57:10Z

Test added and rebased CI: https://ci.nodejs.org/job/node-test-pull-request/13599/

This commit adds operator overloads for increment/decrement to AliasedBuffer::Reference. The motivation for doing this is to hopefully make code that needs to increment/decrement a little simpler. PR-URL: #19083 Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: Tobias Nießen <tniessen@tnie.de> Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Tiancheng "Timothy" Gu <timothygu99@gmail.com>

jasnell · 2018-03-09T16:07:42Z

Landed in 45277e2

This commit adds operator overloads for increment/decrement to AliasedBuffer::Reference. The motivation for doing this is to hopefully make code that needs to increment/decrement a little simpler. PR-URL: #19083 Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: Tobias Nießen <tniessen@tnie.de> Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Tiancheng "Timothy" Gu <timothygu99@gmail.com>

This commit adds operator overloads for increment/decrement to AliasedBuffer::Reference. The motivation for doing this is to hopefully make code that needs to increment/decrement a little simpler. PR-URL: nodejs#19083 Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: Tobias Nießen <tniessen@tnie.de> Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Tiancheng "Timothy" Gu <timothygu99@gmail.com>

jasnell · 2018-08-17T23:30:11Z

Should this be backported to 8.x? If so, a separate backport PR is necessary.

nodejs-github-bot added the c++ Issues and PRs that require attention from people who are familiar with C++. label Mar 2, 2018

jasnell approved these changes Mar 2, 2018

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BridgeAR added the author ready PRs that have at least one approval, no pending requests for changes, and a CI started. label Mar 2, 2018

TimothyGu reviewed Mar 2, 2018

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addaleax approved these changes Mar 2, 2018

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tniessen approved these changes Mar 4, 2018

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cjihrig approved these changes Mar 5, 2018

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addaleax approved these changes Mar 8, 2018

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TimothyGu approved these changes Mar 8, 2018

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danbev added 5 commits March 9, 2018 04:41

src: add incr/decr operators for Reference

5cb22f6

This commit adds operator overloads for increment/decrement to AliasedBuffer::Reference. The motivation for doing this is to hopefully make code that needs to increment/decrement a little simpler.

squash: fix return statements

4fca5f7

squash: call inc operator for decr operator

5c687c0

squash: add test for overload operators

651bfb2

squash: add test for Reference overloads

18f46e8

danbev force-pushed the aliased_buffer_plus_minus_equals_overload branch from 6802731 to 18f46e8 Compare March 9, 2018 06:56

TimothyGu approved these changes Mar 9, 2018

View reviewed changes

jasnell closed this Mar 9, 2018

danbev deleted the aliased_buffer_plus_minus_equals_overload branch March 12, 2018 05:56

targos mentioned this pull request Mar 18, 2018

v9.9.0 proposal #19428

Merged

jasnell added the backport-requested-v8.x label Aug 17, 2018

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src: add incr/decr operators for Reference #19083

src: add incr/decr operators for Reference #19083

danbev commented Mar 2, 2018

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richardlau commented Mar 2, 2018 •

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jasnell commented Aug 17, 2018

src: add incr/decr operators for Reference #19083

src: add incr/decr operators for Reference #19083

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danbev commented Mar 2, 2018

Checklist

Affected core subsystem(s)

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danbev commented Mar 9, 2018

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jasnell commented Aug 17, 2018

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