Nick Lewycky wrote:
The attached patch adds a new attribute named "enable_if" which takes an
expression and a string. At the call site, the arguments are substituted
into the enable_if expression (which is written in terms of the
parameters) to determine whether this function is a viable candidate.
Please review!
I forgot to mention. This patch implements the parse+sema, but there
will need to be a follow-up patch to make this useful in C++ mode
(without using __asm__). We'll need to mangle the enable_if expression
into the name, but I don't have a good mangling for that. The ABI does
provide ways to encode vendor extensions, but there's no way to indicate
that the vendor-extension should be demangled as an expression. It's a
problem for a future patch.
Nick
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