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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Duplicate -Wunguarded-availability warnings on nested classes when if(@available) is present"
href="https://bugs.llvm.org/show_bug.cgi?id=50310">50310</a>
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<th>Summary</th>
<td>Duplicate -Wunguarded-availability warnings on nested classes when if(@available) is present
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<th>Product</th>
<td>clang
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>Macintosh
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<th>OS</th>
<td>MacOS X
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>enhancement
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>Frontend
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>logan.r.smith0@gmail.com
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org, neeilans@live.com, richard-llvm@metafoo.co.uk
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<p>
<div>
<pre>The presence of an if(@available) check in a function body can cause duplicate
-Wunguarded-availability warnings to be produced on members of nested classes
in that same function body:
// clang -cc1 -xobjective-c++ -triple x86_64-apple-macosx10.9
-Wunguarded-availability -fblocks -fsyntax-only
typedef int __attribute__((availability(macos, introduced = 10.12))) new_int;
void foo() {
struct local {
new_int x; // two -Wunguarded-availability warnings produced on this
line
};
if (@available(macos 10.12, *)) {}
}
Removing the if(@available) check below the struct causes only one warning to
be produced, as expected.</pre>
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