Description
This issue was originally filed by [email protected]
Hi guys,
I'm getting some "x is not a member of z" warnings in the editor (when I don't use that little check box in the preferences - as a side note - can't we make that check box a 'positive' - i.e. "use inferred type information..." instead of a "don't use..."?) where I think that the inference should work.
Here is my example:
void drawImage(Image image, num dx, num dy) {
assert(image is HtmlImage);
final htmlImage = image;// as HtmlImage;
_context2d.drawImage(htmlImage.element, dx, dy);
}
since the assert contains an "is" check I would expect not to get a "not a member of" warning on the .element of my HtmlImage class. If I uncomment the 'as' the warning goes away, but I think the 'is' should be enough?
if I wrap the assignment and the method call in an if statement then the warning goes away:
void drawImage(Image image, num dx, num dy) {
assert(image is HtmlImage);
if(image is HtmlImage)
{
final htmlImage = image;// as HtmlImage;
_context2d.drawImage(htmlImage.element, dx, dy);
}
}
What version of the product are you using? On what operating system?
Dart Editor 10315, Windows 64