Function builtin_dot_external 

fn builtin_dot_external(
    args: &[RValue],
    _named: &[(String, RValue)],
    ctx: &BuiltinContext<'_>,
) -> Result<RValue, RError>

.External — invoke a compiled C function via the .External calling convention.

Like .Call but passes all arguments as a single pairlist SEXP. The C function signature is SEXP fn(SEXP args).

@param .NAME character string naming the C function @param … arguments passed to the native function @return the value returned by the native function @namespace base