[cxx-abi-dev] Itanium ABI fails to specify how to mangle lambdas

[Richard Smith]

This is a defect in the standard; the intent was that lambdas would not
ever need to be mangled. See the top of page 2 here:

http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2009/n2859.pdf


On Thu, Jan 17, 2013 at 11:46 AM, Michael Wong <michaelw at ca.ibm.com> wrote:

> Lambdas can appear in contexts where the ABI requires that the expression
> be mangled.
> Note that the lambdas below participate in SFINAE as far as I know.
>
> template <typename T>
> void foo(const int *, char (*)[sizeof(T) > 1 || [] { goto lab; for (;;)
> lab: return T(); }] = 0) { }
>
> template <typename T>
> void foo(int *ptr, char (*)[sizeof(T) > 1 || [] { goto lab; decltype(ptr)
> ptr; lab: return T(ptr); }] = 0) { }
>
> int main() {
>    foo<float>(static_cast<int *>(0));
> }
>
>
>
> Regards, Michael
>
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