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<p class="MsoNormal">You can’t append to an ArrayRef<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><b><span style="font-size:12.0pt;color:black">From: </span></b><span style="font-size:12.0pt;color:black">llvm-dev <llvm-dev-bounces@lists.llvm.org> on behalf of llvm-dev <llvm-dev@lists.llvm.org><br>
<b>Reply-To: </b>Russell Wallace <russell.wallace@gmail.com><br>
<b>Date: </b>Friday, May 3, 2019 at 6:39 PM<br>
<b>To: </b>llvm-dev <llvm-dev@lists.llvm.org><br>
<b>Subject: </b>[llvm-dev] ArrayRef vs SmallVectorImpl<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">It is suggested in the documentation that if you would have declared a function parameter as SmallVector<Foo,N>&, it is better to instead declare it as SmallVectorImpl<Foo>&.
<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">This makes sense, but it seems to me that it is better still to declare it as ArrayRef<Foo>; a quick test suggests it compiles to the same (highly efficient) code, and adds a bit more flexibility in case e.g. you someday want to pass a
std::vector.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">By that logic, there is never any reason to take a SmallVectorImpl, because ArrayRef is strictly better. Am I missing anything?<o:p></o:p></p>
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