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<base href="https://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Template compilation failure with -fdelayed-template-parsing when compiling an AST loaded from a PCH/AST file"
href="https://llvm.org/bugs/show_bug.cgi?id=23388">23388</a>
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</tr>
<tr>
<th>Summary</th>
<td>Template compilation failure with -fdelayed-template-parsing when compiling an AST loaded from a PCH/AST file
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
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<th>Version</th>
<td>trunk
</td>
</tr>
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<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>C++
</td>
</tr>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>thonermann@coverity.com
</td>
</tr>
<tr>
<th>CC</th>
<td>dgregor@apple.com, llvmbugs@cs.uiuc.edu
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>The following test demonstrates a compilation failure that occurs only when the
code is first emitted to a .ast file, and then compiled. Direct compilation
succeeds. Tested with Clang 3.7.0 trunk (r234313), but this reproduces back to
Clang 3.4.
$ cat t.cpp
int f(int p) {
return p;
}
template<int N>
struct S {
static int smf() {
return f(static_cast<int>(N));
}
};
auto a = S<0>::smf();
$ clang -c -std=c++11 -fdelayed-template-parsing t.cpp; echo $?
0
$ clang -emit-ast -std=c++11 -fdelayed-template-parsing t.cpp; echo $?
0
$ clang -c t.ast; echo $?
/nfs/thonermann/tmp/t.cpp:7:18: error: use of undeclared identifier
'static_cast'
return f(static_cast<int>(N));
^
/nfs/thonermann/tmp/t.cpp:7:33: error: expected '(' for function-style cast or
type construction
return f(static_cast<int>(N));
~~~^
2 errors generated.
1
It seems some state is not being preserved in .ast files.</pre>
</div>
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