<html>
<head>
<base href="http://llvm.org/bugs/" />
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Compilation fail"
href="http://llvm.org/bugs/show_bug.cgi?id=16337">16337</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Compilation fail
</td>
</tr>
<tr>
<th>Product</th>
<td>libc++
</td>
</tr>
<tr>
<th>Version</th>
<td>3.2
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Macintosh
</td>
</tr>
<tr>
<th>OS</th>
<td>MacOS X
</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>
<tr>
<th>Component</th>
<td>All Bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>hhinnant@apple.com
</td>
</tr>
<tr>
<th>Reporter</th>
<td>matthewtff@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>#include <functional>
#include <iostream>
template <typename Type>
class Y {
public:
typedef std::function<Type(Type)> Lamba;
Lamba operator() (std::function<Type(Lamba, Type)> f) const {
auto combined = std::bind(&Y<Type>::operator(), this, f);
return std::bind(f, combined, std::placeholders::_1);
}
}; // class Y<Type>
typedef int Type;
typedef Y<Type> YCombinator;
int main(void)
{
YCombinator y;
auto result = y (
[](YCombinator::Lamba f, Type x) {
return x == 0 ? 1 : x * f(x - 1);
}) (5);
std::cout << "Result : " << result << std::endl;
return 0;
}
I've tried to compile such example code, but it fails under clang. Well it
fails whether i use libc++ or not, but errors are different. I actually don't
know if it is a libc++ bug or clang.
clang++ --version:
Apple LLVM version 4.2 (clang-425.0.27) (based on LLVM 3.2svn)
Target: x86_64-apple-darwin12.4.0
As far as I know this code is quite correct, and successfully compiled and
executed using g++/Visual Studio 2010.</pre>
</div>
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