fixes #206, add checking for unary ops

lib/runtime/dart/math.js

 var math = dart.defineLibrary(math, {});
 var core = dart.import(core);
 var _js_helper = dart.lazyImport(_js_helper);
 (function(exports, core, _js_helper) {
   'use strict';
   class _JenkinsSmiHash extends core.Object {
     static combine(hash, value) {
       hash = 536870911 & dart.notNull(hash) + dart.notNull(value);
       hash = 536870911 & dart.notNull(hash) + ((524287 & dart.notNull(hash)) << 10);
       return dart.notNull(hash) ^ dart.notNull(hash) >> 6;
@@ skipping 24 matching lines @@
       Point(x, y) {
         this.x = x;
         this.y = y;
       }
       toString() {
         return `Point(${this.x}, ${this.y})`;
       }
       ['=='](other) {
         if (!dart.is(other, Point$()))
           return false;
-        return dart.notNull(dart.equals(this.x, dart.dload(other, 'x'))) && dart.notNull(dart.equals(this.y, dart.dload(other, 'y')));
+        return dart.equals(this.x, dart.dload(other, 'x')) && dart.equals(this.y, dart.dload(other, 'y'));
       }
       get hashCode() {
         return _JenkinsSmiHash.hash2(dart.hashCode(this.x), dart.hashCode(this.y));
       }
       ['+'](other) {
         dart.as(other, Point$(T));
         return new (Point$(T))(dart.as(this.x['+'](other.x), T), dart.as(this.y['+'](other.y), T));
       }
       ['-'](other) {
         dart.as(other, Point$(T));
@@ skipping 50 matching lines @@
       }
       get bottom() {
         return dart.as(this.top['+'](this.height), T);
       }
       toString() {
         return `Rectangle (${this.left}, ${this.top}) ${this.width} x ${this.height}`;
       }
       ['=='](other) {
         if (!dart.is(other, Rectangle))
           return false;
-        return dart.notNull(dart.equals(this.left, dart.dload(other, 'left'))) && dart.notNull(dart.equals(this.top, dart.dload(other, 'top'))) && dart.notNull(dart.equals(this.right, dart.dload(other, 'right'))) && dart.notNull(dart.equals(this.bottom, dart.dload(other, 'bottom')));
+        return dart.equals(this.left, dart.dload(other, 'left')) && dart.equals(this.top, dart.dload(other, 'top')) && dart.equals(this.right, dart.dload(other, 'right')) && dart.equals(this.bottom, dart.dload(other, 'bottom'));
       }
       get hashCode() {
         return _JenkinsSmiHash.hash4(dart.hashCode(this.left), dart.hashCode(this.top), dart.hashCode(this.right), dart.hashCode(this.bottom));
       }
       intersection(other) {
         dart.as(other, Rectangle$(T));
         let x0 = max(this.left, other.left);
         let x1 = min(this.left['+'](this.width), other.left['+'](other.width));
         if (dart.notNull(x0) <= dart.notNull(x1)) {
           let y0 = max(this.top, other.top);
@@ skipping 45 matching lines @@
       })
     });
     return _RectangleBase;
   });
   let _RectangleBase = _RectangleBase$();
   let Rectangle$ = dart.generic(function(T) {
     class Rectangle extends _RectangleBase$(T) {
       Rectangle(left, top, width, height) {
         this.left = left;
         this.top = top;
-        this.width = dart.as(width['<'](0) ? dart.notNull(width['unary-']()) * 0 : width, T);
-        this.height = dart.as(height['<'](0) ? dart.notNull(height['unary-']()) * 0 : height, T);
+        this.width = dart.as(dart.notNull(width['<'](0)) ? dart.notNull(width['unary-']()) * 0 : width, T);
+        this.height = dart.as(dart.notNull(height['<'](0)) ? dart.notNull(height['unary-']()) * 0 : height, T);
         super._RectangleBase();
       }
       static fromPoints(a, b) {
         let left = dart.as(min(a.x, b.x), T);
         let width = dart.as(max(a.x, b.x)[dartx['-']](left), T);
         let top = dart.as(min(a.y, b.y), T);
         let height = dart.as(max(a.y, b.y)[dartx['-']](top), T);
         return new (Rectangle$(T))(left, top, width, height);
       }
     }
     dart.setSignature(Rectangle, {
       constructors: () => ({
         Rectangle: [Rectangle$(T), [T, T, T, T]],
         fromPoints: [Rectangle$(T), [Point$(T), Point$(T)]]
       })
     });
     return Rectangle;
   });
   let Rectangle = Rectangle$();
   let _width = Symbol('_width');
   let _height = Symbol('_height');
   let MutableRectangle$ = dart.generic(function(T) {
     class MutableRectangle extends _RectangleBase$(T) {
       MutableRectangle(left, top, width, height) {
         this.left = left;
         this.top = top;
-        this[_width] = dart.as(width['<'](0) ? _clampToZero(width) : width, T);
-        this[_height] = dart.as(height['<'](0) ? _clampToZero(height) : height, T);
+        this[_width] = dart.as(dart.notNull(width['<'](0)) ? _clampToZero(width) : width, T);
+        this[_height] = dart.as(dart.notNull(height['<'](0)) ? _clampToZero(height) : height, T);
         super._RectangleBase();
       }
       static fromPoints(a, b) {
         let left = dart.as(min(a.x, b.x), T);
         let width = dart.as(max(a.x, b.x)[dartx['-']](left), T);
         let top = dart.as(min(a.y, b.y), T);
         let height = dart.as(max(a.y, b.y)[dartx['-']](top), T);
         return new (MutableRectangle$(T))(left, top, width, height);
       }
       get width() {
         return this[_width];
       }
       set width(width) {
         dart.as(width, T);
-        if (width['<'](0))
+        if (dart.notNull(width['<'](0)))
           width = dart.as(_clampToZero(width), T);
         this[_width] = width;
       }
       get height() {
         return this[_height];
       }
       set height(height) {
         dart.as(height, T);
-        if (height['<'](0))
+        if (dart.notNull(height['<'](0)))
           height = dart.as(_clampToZero(height), T);
         this[_height] = height;
       }
     }
     MutableRectangle[dart.implements] = () => [Rectangle$(T)];
     dart.setSignature(MutableRectangle, {
       constructors: () => ({
         MutableRectangle: [MutableRectangle$(T), [T, T, T, T]],
         fromPoints: [MutableRectangle$(T), [Point$(T), Point$(T)]]
       })
@@ skipping 44 matching lines @@
     if (dart.notNull(a) > dart.notNull(b))
       return a;
     if (dart.notNull(a) < dart.notNull(b))
       return b;
     if (typeof b == 'number') {
       if (typeof a == 'number') {
         if (a == 0.0) {
           return dart.notNull(a) + dart.notNull(b);
         }
       }
-      if (b[dartx.isNaN])
+      if (dart.notNull(b[dartx.isNaN]))
         return b;
       return a;
     }
     if (b == 0 && dart.notNull(a[dartx.isNegative]))
       return b;
     return a;
   }
   dart.fn(max, core.num, [core.num, core.num]);
   function atan2(a, b) {
     return Math.atan2(_js_helper.checkNum(a), _js_helper.checkNum(b));
@@ skipping 204 matching lines @@
   exports.sin = sin;
   exports.cos = cos;
   exports.tan = tan;
   exports.acos = acos;
   exports.asin = asin;
   exports.atan = atan;
   exports.sqrt = sqrt;
   exports.exp = exp;
   exports.log = log;
 })(math, core, _js_helper);