Re: LuaJIT 2 ffi (casting / force hotpath)
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- Subject: Re: LuaJIT 2 ffi (casting / force hotpath)
- From: Leonardo Palozzi <lpalozzi@...>
- Date: 2011年1月25日 23:02:59 -0800
On 1/15/2011 2:54 PM, Mike Pall wrote:
> Well, I don't want to copy _all_ of the joys of C++ in Lua. :-)
> So LuaJIT simply allows all of these:
>
> ffi.cdef[[
> typedef enum { RED, GREEN, BLUE } PrimaryColor;
> int bar(PrimaryColor x);
> ]]
>
> ffi.C.bar(2)
> ffi.C.bar(ffi.C.BLUE)
> ffi.C.bar("BLUE") -- Strings are (type-safe!) converted to enums.
Are enum function return types supported?
I get "attempt to compare 'enum 95' with 'double'" error message when i
try something like this:
ffi.cdef[[PrimaryColor foo();]]
if foo() == ffi.C.BLUE then ...
I would like to avoid using tonumber():
if tonumber(foo()) == ffi.C.BLUE then ...
Thanks.