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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - diagnose_if generates better diagnostics as a warning"
href="https://llvm.org/bugs/show_bug.cgi?id=31640">31640</a>
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<th>Summary</th>
<td>diagnose_if generates better diagnostics as a warning
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>All
</td>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>C++
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>eric@efcs.ca
</td>
</tr>
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<th>CC</th>
<td>dgregor@apple.com, llvm-bugs@lists.llvm.org
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<th>Classification</th>
<td>Unclassified
</td>
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<p>
<div>
<pre>Currently diagnose_if produces entirely different diagnostics when used as an
error instead of a warning. The error diagnostic is equivalent to an
"unavailable(msg)" diagnostic while the warning simply generates "warning:
msg".
I believe the error diagnostic is misleading and should be change to match the
warning diagnostics.
Example:
void foo(int i) __attribute__((diagnose_if(i, "my warning", "warning"))) {}
void foo(long i) {}
void bar(int i) __attribute__((diagnose_if(i, "my error", "error"))) {}
void bar(long i) {}
int main() {
foo(1); // expected-warning {{my warning}}
bar(1); // expected-error {{call to unavailable function 'bar'}}
}</pre>
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