Re: mixing lush with clush

On 3/17/06, Ralf Juengling <[email protected]> wrote:
> The DX wrappers are all hand-coded. They essentially do runtime
> type-checking and then call the wrapped C function (if it exits).
> When you say "the compiler should produce marshalling code" for
> C API functions, I guess you mean it should do the type checking
> at compile time if possible, perhaps emit C code for runtime type
> checking where it doesn't have enough information at compile time,
> and finally emit the C function call. It currently cannot do compile
> time type-checking because the DXs do not carry information about
> the C functions they wrap. DHs do carry that information.

Well, by marshalling I meant that when the compiler comes across a
form that it can't translate into C, it emits code that does the
following:
   - box up any local variables that the form refers to and add them
to the lisp environment
   - call the interpreter to evaluate the form
   - insert run time type checks when assigning the return value to a
local variable of a specific type (otherwise leave the return value
boxed up)

> I hope that makes sense.

Yes, thank you for the primer!


Yury


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