[PATCH] Fix diagnostics for C-style cast to function type

[Logan Chien]

Ping?


On Mon, Mar 17, 2014 at 11:59 PM, Logan Chien <tzuhsiang.chien at gmail.com>wrote:

> Hi,
>
> It seems that if the C-style type cast is applied to the overloaded
> function and the destination type is function type, then Clang will crash
> with assertion failure.  For example,
>
>     void foo(int);
>     void foo(int, int);
>     void bar() {
>         typedef void (ft)(int);
>         ft p = (ft)foo;
>     }
>
> In this case, the overloaded function foo will be cast to a function type,
> which should be considered as an error.  But, unfortunately, since the
> function resolution is using canonical type, the matched function will be
> returned, and raise SEGV at lib/Sema/SemaCast.cpp:2101.
>
> This patch fixes this issue by removing the assertion and add some error
> diagnostics as the one in static_cast.  Please have a look.  Thanks.
>
> Logan
>
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