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Equivalent example using nbind

Thought you might be interested in a port of this example to nbind. Maybe this could be a tutorial step 4?

Here's the equivalent example.cc:

#include <string>
#include "nbind/nbind.h"

const int maxValue = 10;
int numberOfCalls = 0;

std::string WhoAmI() {
  return "I'm a Node Hero!";
}

double increment(int argsValue) {
  if (numberOfCalls + argsValue > maxValue) {
    NBIND_ERR("Counter went through the roof!");
    return 0;
  }

  numberOfCalls += argsValue;

  return numberOfCalls;
}

NBIND_GLOBAL() {
  // The second parameter renaming the function is optional.
  function(WhoAmI, "whoami");

  // The nbind::Strict() policy makes passing non-numbers throw
  // instead of coercing to number like +["42"] would do in JavaScript.
  // To also rename the function, add the new name before any policies.
  function(increment, nbind::Strict());
}

To avoid having to install node-gyp and autogypi globally, I usually add these scripts in package.json:

  "scripts": {
    "autogypi": "autogypi",
    "node-gyp": "node-gyp",

Then here's the extra shell commands to install nbind:

npm install --save nbind
npm install --save-dev autogypi
rm binding.gyp
npm run -- autogypi --init-gyp -p nbind -s example.cc

index.js needs a one-line change to how the addon is loaded:

const addon = require('nbind').init().lib

Now it works! Run:

npm install
node index.js

It prints the exact same output as the original version.

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