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<body><span class="vcard"><a class="email" href="mailto:richard-llvm@metafoo.co.uk" title="Richard Smith <richard-llvm@metafoo.co.uk>"> <span class="fn">Richard Smith</span></a>
</span> changed
<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED INVALID - explicitly instantiating an overloaded template function instantiates the wrong function"
href="http://llvm.org/bugs/show_bug.cgi?id=20739">bug 20739</a>
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<th>What</th>
<th>Removed</th>
<th>Added</th>
</tr>
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<td style="text-align:right;">Status</td>
<td>NEW
</td>
<td>RESOLVED
</td>
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<td style="text-align:right;">CC</td>
<td>
</td>
<td>richard-llvm@metafoo.co.uk
</td>
</tr>
<tr>
<td style="text-align:right;">Resolution</td>
<td>---
</td>
<td>INVALID
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<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED INVALID - explicitly instantiating an overloaded template function instantiates the wrong function"
href="http://llvm.org/bugs/show_bug.cgi?id=20739#c2">Comment # 2</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED INVALID - explicitly instantiating an overloaded template function instantiates the wrong function"
href="http://llvm.org/bugs/show_bug.cgi?id=20739">bug 20739</a>
from <span class="vcard"><a class="email" href="mailto:richard-llvm@metafoo.co.uk" title="Richard Smith <richard-llvm@metafoo.co.uk>"> <span class="fn">Richard Smith</span></a>
</span></b>
<pre>Explicitly-specified template arguments are substituted before template
argument deduction is performed; see 14.8.2 paragraphs 2-5. Therefore, when
Clang sees
template unsigned long & thrust::get <2, unsigned long,
X>(thrust::detail::cons<unsigned long, X> &);
[with X = thrust::detail::cons<unsigned long, thrust::detail::cons<unsigned
long, thrust::null_type> >]
... it will try substituting <2, unsigned long, ...> into each declaration of
'get' before it considers whether the parameter types can match. And
substituting into the declaration on line 126...
template<unsigned int N, typename T1, typename T2>
inline
typename tuple_element<N, pair<T1,T2> >::type &
get(pair<T1,T2> &p)
... produces the type 'tuple_element<2, pair<unsigned long, X> >::type', which
triggers the instantiation of 'tuple_element<2, pair<unsigned long, X> >',
which results in an error outside the immediate context of the substitution.
Therefore your code is ill-formed.</pre>
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