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<body><span class="vcard"><a class="email" href="mailto:dblaikie@gmail.com" title="David Blaikie <dblaikie@gmail.com>"> <span class="fn">David Blaikie</span></a>
</span> changed
<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED INVALID - compilation error when parameters have certain complexity"
href="https://bugs.llvm.org/show_bug.cgi?id=38294">bug 38294</a>
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<th>What</th>
<th>Removed</th>
<th>Added</th>
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<td style="text-align:right;">Resolution</td>
<td>---
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<td>INVALID
</td>
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<td style="text-align:right;">CC</td>
<td>
</td>
<td>dblaikie@gmail.com, richard-llvm@metafoo.co.uk
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<td style="text-align:right;">Status</td>
<td>NEW
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<td>RESOLVED
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<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED INVALID - compilation error when parameters have certain complexity"
href="https://bugs.llvm.org/show_bug.cgi?id=38294#c1">Comment # 1</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED INVALID - compilation error when parameters have certain complexity"
href="https://bugs.llvm.org/show_bug.cgi?id=38294">bug 38294</a>
from <span class="vcard"><a class="email" href="mailto:dblaikie@gmail.com" title="David Blaikie <dblaikie@gmail.com>"> <span class="fn">David Blaikie</span></a>
</span></b>
<pre>Richard can correct me if I'm wrong here, but I think this code is invalid,
though no diagnostic is required.
The complexity of the code doesn't seem to matter to Clang rejecting this and
GCC accepting it. I could maintain that invariant (using GCC 8.1 at least - I
don't have a dev revision of GCC built) while reducing the test down to:
class foo {
void operator+(const foo &x) const;
};
template <int footemplate> void foo_function(foo A, foo B) { A + B; }
Once 'foo_function' isn't a template (or if that template is instantiated in
any way) GCC also rejects this.
C++ doesn't require the compiler to diagnose these sort of cases of invalid
non-dependent expressions - Clang does, GCC doesn't, those are both acceptable
implementations. It'd be a minor quality-of-implementation improvement if GCC
rejected this, since all instantiations of the template are invalid.</pre>
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