chaiscript_errorhandling.chai

// ChaiScript's primary error handling is exceptions, just like C++, and uses C++
// exceptions internally. This means that exceptions can be shared / passed / handled
// between ChaiScript and C++

// catching chaiscript errors inside of chaiscript
try {
  eval("BLARG")
} catch (e) {
  print("Error while processing eval statement"))
}

// catching C++ errors inside of chaiscript
// Note, there was a bug preventing this particular type
// of exception from being caught in chaiscript until
// 2014-08-26
try {
  var vec = [1,2]
  var val = vec[3]
} catch (e) {
  print("Oops, index out of range: " + e.what());
}


// throwing errors to myself. Just like in C++, an exception 
// can be anything.
try {
  throw(5.2)
} catch(e) {
  print(e); // prints 5.2
}

// Note that if you wanted to let this exception propigate to C++, you could, 
// see here for more examples http://chaiscript.com/docs/5/index.html#exceptions


// You can also use guards with a catch clause, just like any other function:
try {
  throw(5.2)
} catch(e) : is_type(e, "int") {
  print("Int: ${e}"); // e is a double, called
  // never called, 5.2 is not an int
} catch(e) : is_type(e, "double") {
  print("Double: ${e}"); // e is a double, called
}

Line 9 has a surplus closing bracket:

print("Error while processing eval statement"))

should be

print("Error while processing eval statement")