Nullsafety

Macro functions to convert long chain of calls into if( x != null ) checks

Chained calls can have field accesses, function calls and array accesses. First expression of the array access is checked too, functions are called without checking if it is null

some().long[0].chain - will check some() != null, long != null, long[0] !=null

Parenthesis (some.long).chain - will check expression in parenthesis and the rest of the call: some.long != null, chain != null

safeCall

Returns true if all calls were made.

Example:

if(safeCall(some.long.chain)) {
}

Will be transformed into

var __f = false;
if(some != null) {
  var __0 = some.long;
  if(__0 != null){
     __0.chain;
     __f = true;
   }
}
if(__f){
  
}

safeGet

Returns the result of the chained calls or default value.

For nullable type: Will check the result of the last call as well and return default value if it is null. If call was successful, default expression will not be executed.

For Int, Float, Bool: Will not check the result of the last call. In case if default value is omitted, returns 0 , 0.0, false.

Expample:

var x = safeGet(some.long.chain.x, 10);

will be transformed into

var __f = false;
var __r = 0;
if(some != null) {
var __0 = some.long;
  if(__0 != null){
    var __1 = __0.chain;
    if(__1 != null){
      __r = __1.x;
      __f = true;
    }
  }
}
if(!__f)
  __r = 10;
var x = __r;