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src: ignore unused warning for inspector-agent.cc #13188

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src: ignore unused warning for inspector-agent.cc #13188

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2 changes: 1 addition & 1 deletion src/inspector_agent.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -215,7 +215,7 @@ class JsBindingsSessionDelegate : public InspectorSessionDelegate {
Local<Value> argument = v8string.ToLocalChecked().As<Value>();
Local<Function> callback = callback_.Get(isolate);
Local<Object> receiver = receiver_.Get(isolate);
callback->Call(env_->context(), receiver, 1, &argument);
static_cast<void>(callback->Call(env_->context(), receiver, 1, &argument));
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@refack refack May 24, 2017 •
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Wouldn't

#pragma GCC unused-result push
#pragma GCC unused-result ignored
callback->Call(env_->context(), receiver, 1, &argument)
#pragma GCC unused-result pop

be better, so it could be traced in the future

Or even just a comment stating the the // static_cast<void> is to skip 'unused-result' warning?

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@sam-github sam-github May 24, 2017

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No comment on the portability of the pragma, but there is no reason to cast to void other than to avoid warnings and visually document that the return value is explicitly being ignored, I don't think a comment is needed for that usage.

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@refack refack May 24, 2017

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Agreed if we document this somewhere as an idiom static_cast<void> === #pragma GCC unused-result ignored
Because a quick search only found one other use, in this file in line 210@master 352@here.

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@refack refack May 24, 2017

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Since we don't have a style guide, I'll add a note to #12791

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@sam-github sam-github May 24, 2017

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Casting to void is standard C++, https://stackoverflow.com/questions/689677/why-cast-unused-return-values-to-void, unlike GCC pramas.

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@refack refack May 24, 2017

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I already agreed 👌

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@sam-github sam-github May 24, 2017

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Sorry, I thought you wanted this documented as a node-specific style. Nice emoji use.

}

void Disconnect() {
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