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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - overloadable + string literal => ambiguous"
href="https://bugs.llvm.org/show_bug.cgi?id=49978">49978</a>
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<th>Summary</th>
<td>overloadable + string literal => ambiguous
</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>PC
</td>
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<th>OS</th>
<td>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>C
</td>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>jonathanchesterfield@gmail.com
</td>
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<th>CC</th>
<td>blitzrakete@gmail.com, dgregor@apple.com, erik.pilkington@gmail.com, llvm-bugs@lists.llvm.org, richard-llvm@metafoo.co.uk
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<p>
<div>
<pre>Godbolt <a href="https://godbolt.org/z/49j3E6Tjn">https://godbolt.org/z/49j3E6Tjn</a>
Give overloadable functions on const char* and char*,
__attribute__((overloadable))
void func(const char * s) {}
__attribute__((overloadable))
void func(char * s) {}
All the calls below work except the unadorned string literal. This should decay
to a char* (this is C, not C++) and call the char* overload.
<source>:17:5: error: call to 'func' is ambiguous
func("failure");
void caller()
{
char mut[4] = "mut";
const char * cst = "cst";
func(mut);
func(cst);
func((const char*)"cst cast");
func((char*)"mut cast");
func(&"explicit ok"[0]);
func((char[3]){1,2,3});
func((const char[3]){1,2,3});
func("failure");
}
This is moderately annoying for some library code intended for openmp so I'm
probably available to fix if there is consensus that this is indeed a bug in
clang.</pre>
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