Differences between version #15195 and #15196

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> ====== Nullability ======
> When not specified, an optional parameter will have the default value ''null'' but on static platforms (Flash, CPP, Java, C#) null can't be used as basic type. On those platforms the following function definition:
> <code haxe> static function foo( ?x:Int ) { </code>
> will be compiled as:
> <code haxe>static function foo( ?x:Null<Int>) {</code>
> Considering the following function:
> <code haxe>static function foo( x=1 ) {</code>
> it cannot be called with //foo(null);// unless you add a question mark :
> <code haxe>static function foo( ?x=1 ) {</code>
> or add type information:
> <code haxe>static function foo( x:Null<Int>=1 ) {</code>