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<body><span class="vcard"><a class="email" href="mailto:rnk@google.com" title="Reid Kleckner <rnk@google.com>"> <span class="fn">Reid Kleckner</span></a>
</span> changed
<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED WONTFIX - MS compatibility: Use token-based instantiation for -fdelayed-template-parsing"
href="http://llvm.org/bugs/show_bug.cgi?id=18714">bug 18714</a>
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<table border="1" cellspacing="0" cellpadding="8">
<tr>
<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
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<tr>
<td style="text-align:right;">Resolution</td>
<td>---
</td>
<td>WONTFIX
</td>
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<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED WONTFIX - MS compatibility: Use token-based instantiation for -fdelayed-template-parsing"
href="http://llvm.org/bugs/show_bug.cgi?id=18714#c2">Comment # 2</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED WONTFIX - MS compatibility: Use token-based instantiation for -fdelayed-template-parsing"
href="http://llvm.org/bugs/show_bug.cgi?id=18714">bug 18714</a>
from <span class="vcard"><a class="email" href="mailto:rnk@google.com" title="Reid Kleckner <rnk@google.com>"> <span class="fn">Reid Kleckner</span></a>
</span></b>
<pre>(In reply to <a href="show_bug.cgi?id=18714#c1">comment #1</a>)
<span class="quote">> Can you give some pointers on the nature of the token transformation?
>
> Do you have a feel for the phases of token caching, instantiation and
> substitution that might be going on in MSVC?</span >
First, I just want to say that I've been talked out of this approach since I
filed this bug, so I'm closing it. :)
Answering your question, yes, they appear to do roughly what
-fdelayed-template-parsing does: they parse class template bodies, but they
slurp the tokens from C++ inline method definitions and parse them once they
are instantiated and referenced. I believe you *need* to use typename with
MSVC when appropriate in a class template body outside of C++ inline methods.
The key difference is that method bodies are *never* parsed prior to
instantiation. The template parameters are substituted with arguments before
parsing, so MSVC always knows if a nested-name-specifier is a type.
Basically, I've gotten the hang of recovering from missing 'typename' now, so I
don't think it will be that hard to handle this without token substitution.</pre>
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