hi all, We've been making some progress with GHCJS [1] recently (preemptive lightweight threads, async io, black holes and async exceptions work in the new code generator now), but have run into a problem with FFI imports. So far we've been using the ccall import syntax: foreign import ccall "sin" :: CDouble -> CDouble This would import the JavaScript function `h$sin` (in order to reduce clashes with other JavaScript functions in foreign imports of existing Haskell packages). Other than the ccall name, which is just a minor niggle, this worked completely fine. Now we would like to extend this, for example: foreign import ccall "@cos" :: CDouble -> CDouble (@ would escape the usual `h$` prefixing) foreign import ccall "$r = $1.someMethod($2)" :: JSObject -> CDouble -> CDouble (inline JavaScript macro, similar to Fay and UHC-JS) Unfortunately GHC rejects these, since they're not valid C identifiers. What we need is some calling convention that just accepts any import string, but otherwise behaves like ccall. What would be a good way of doing this, is it possible without changing GHC? If not, would it be acceptable to add a calling convention? Suggestions welcome! luite [1] https://github.com/ghcjs/ghcjs/tree/gen2-64-alth