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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Need a pedantic warning for switch statements with implicit default"
href="https://bugs.llvm.org/show_bug.cgi?id=47112">47112</a>
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<th>Summary</th>
<td>Need a pedantic warning for switch statements with implicit default
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<th>Product</th>
<td>clang
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<th>Version</th>
<td>trunk
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<th>Hardware</th>
<td>PC
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<th>OS</th>
<td>All
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<th>Status</th>
<td>NEW
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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>-New Bugs
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>dave@znu.io
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<th>CC</th>
<td>htmldeveloper@gmail.com, llvm-bugs@lists.llvm.org, neeilans@live.com, richard-llvm@metafoo.co.uk
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<pre>I learned recently that the C++ standard allows enums to contain values that
aren't valid, therefore a "covered" switch without a default might not handle
all values from the perspective of the standard.
It would be nice if this scenario had an opt-in pedantic warning. For example:
enum class Foo { A, B, C };
int exampleCoveredSwitch(Foo foo) {
switch (foo) {
case Foo::A: return 12;
case Foo::B: return 34;
case Foo::C: return 56;
}
// some kind of opt-in warning here about returning from a non-void
function
}</pre>
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