[Ur] calling sml

[Adam Chlipala]

Gergely Buday wrote:
> is it possible to call SML functions - e.g. yacc or antlr parsers -
> from Ur/Web code? If not, how much work would it be to implement this?
>    

Despite the fact that the Ur/Web compiler is written in SML, there is 
currently no special support for run-time interaction with SML code.  It 
can be coded up fairly easily via the Ur/Web FFI and the FFI of any SML 
implementation that allows C programs to "be in charge" and occasionally 
call SML code.