damn C++ templates... (revised to use a macro instead...)

binding.cc

#include "v8.h"
#include "node.h"

using namespace v8;
using namespace node;

namespace {

#define PASTE2(a, b) a##b
#define PASTE(a, b) PASTE2(a, b)

#define FN(type, v8type, fn) \
Handle<Value> PASTE(node_, fn) (const Arguments& args) { \
  HandleScope scope; \
  type input = (type)args[0]->PASTE(v8type, Value)(); \
  type output = fn(input); \
  return scope.Close(Number::New(output)); \
}

/* functions we want to expose to JavaScript */
int foo (int a) {
  return -a;
}

float bar (float f) {
  return f * f;
}

/* define the V8 functions */
FN(int, Int32, foo);
FN(float, Number, bar);

void Initialize(Handle<Object> target) {
  HandleScope scope;
  NODE_SET_METHOD(target, "foo", node_foo);
  NODE_SET_METHOD(target, "bar", node_bar);
}

}

NODE_MODULE(binding, Initialize);