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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - compiling w -fno-exceptions generates errors on "throw" in templates that are never instantiated"
href="https://llvm.org/bugs/show_bug.cgi?id=26216">26216</a>
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<th>Summary</th>
<td>compiling w -fno-exceptions generates errors on "throw" in templates that are never instantiated
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>Macintosh
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<th>OS</th>
<td>All
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>C++
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>mclow.lists@gmail.com
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<th>CC</th>
<td>dgregor@apple.com, llvm-bugs@lists.llvm.org
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<th>Classification</th>
<td>Unclassified
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<p>
<div>
<pre>I ran into this in the libc++ test suite.
If -fno-exceptions is defined, the following code compiles w/o error using GCC,
but gets an error with clang.
My expectation matches gcc's behavior; no error should be generated
unless/until the template is instantiated.
Reproducer:
#include <iostream>
#include <stdexcept>
template <typename T>
struct wrap {
wrap() : t_() {}
wrap(const T& t) : t_(t) {}
T & get() { return t_; }
void toss () { throw std::runtime_error("Toss"); }
T t_;
};
int main() {
std::cout << "Hello World" << std::endl;
}</pre>
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