Fix analyzer interpretation of 'ClassName?.staticMember'.

tests/language/conditional_property_increment_decrement_test.dart

Index: tests/language/conditional_property_increment_decrement_test.dart
diff --git a/tests/language/conditional_property_increment_decrement_test.dart b/tests/language/conditional_property_increment_decrement_test.dart
index 6858a6990b320a1794c0fa902a284a87c56bde3e..81a27c65b5a4f1e2b07c647f224cd74b2d32b3a0 100644
--- a/tests/language/conditional_property_increment_decrement_test.dart
+++ b/tests/language/conditional_property_increment_decrement_test.dart
@@ -6,16 +6,18 @@
 // preincrement expression (or a postdecrement or predecrement expression).
 
 import "package:expect/expect.dart";
+import "conditional_access_helper.dart" as h;
 
 class C {
   int v;
   C(this.v);
-  static var staticField;
+  static int staticInt;
 }
 
 class D {
   E v;
   D(this.v);
+  static E staticE;
 }
 
 class E {
@@ -42,31 +44,63 @@ main() {
   Expect.equals(null, nullC()?.v++); /// 01: ok
   { C c = new C(1); Expect.equals(1, c?.v++); Expect.equals(2, c.v); } /// 02: ok
 
+  // C?.v++ is equivalent to C.v++.
+  { C.staticInt = 1; Expect.equals(1, C?.staticInt++); Expect.equals(2, C.staticInt); } /// 17: ok
+  { h.C.staticInt = 1; Expect.equals(1, h.C?.staticInt++); Expect.equals(2, h.C.staticInt); } /// 18: ok
+
   // The static type of e1?.v++ is the same as the static type of e1.v.
   { E e1 = new E(); D d = new D(e1); E e2 = d?.v++; Expect.identical(e1, e2); } /// 03: ok
   { G g = new G(); D d = new D(g); F f = d?.v++; Expect.identical(f, g); } /// 04: static type warning
+  { E e1 = new E(); D.staticE = e1; E e2 = D?.staticE++; Expect.identical(e1, e2); } /// 19: ok
+  { h.E e1 = new h.E(); h.D.staticE = e1; h.E e2 = h.D?.staticE++; Expect.identical(e1, e2); } /// 20: ok
+  { G g = new G(); D.staticE = g; F f = D?.staticE++; Expect.identical(f, g); } /// 21: static type warning
+  { h.G g = new h.G(); h.D.staticE = g; h.F f = h.D?.staticE++; Expect.identical(f, g); } /// 22: static type warning
 
   // e1?.v-- is equivalent to ((x) => x == null ? null : x.v--)(e1).
   Expect.equals(null, nullC()?.v--); /// 05: ok
   { C c = new C(1); Expect.equals(1, c?.v--); Expect.equals(0, c.v); } /// 06: ok
 
+  // C?.v-- is equivalent to C.v--.
+  { C.staticInt = 1; Expect.equals(1, C?.staticInt--); Expect.equals(0, C.staticInt); } /// 23: ok
+  { h.C.staticInt = 1; Expect.equals(1, h.C?.staticInt--); Expect.equals(0, h.C.staticInt); } /// 24: ok
+
   // The static type of e1?.v-- is the same as the static type of e1.v.
   { E e1 = new E(); D d = new D(e1); E e2 = d?.v--; Expect.identical(e1, e2); } /// 07: ok
   { G g = new G(); D d = new D(g); F f = d?.v--; Expect.identical(f, g); } /// 08: static type warning
+  { E e1 = new E(); D.staticE = e1; E e2 = D?.staticE--; Expect.identical(e1, e2); } /// 25: ok
+  { h.E e1 = new h.E(); h.D.staticE = e1; h.E e2 = h.D?.staticE--; Expect.identical(e1, e2); } /// 26: ok
+  { G g = new G(); D.staticE = g; F f = D?.staticE--; Expect.identical(f, g); } /// 27: static type warning
+  { h.G g = new h.G(); h.D.staticE = g; h.F f = h.D?.staticE--; Expect.identical(f, g); } /// 28: static type warning
 
   // ++e1?.v is equivalent to e1?.v += 1.
   Expect.equals(null, ++nullC()?.v); /// 09: ok
   { C c = new C(1); Expect.equals(2, ++c?.v); Expect.equals(2, c.v); } /// 10: ok
 
+  // ++C?.v is equivalent to C?.v += 1.
+  { C.staticInt = 1; Expect.equals(2, ++C?.staticInt); Expect.equals(2, C.staticInt); } /// 29: ok
+  { h.C.staticInt = 1; Expect.equals(2, ++h.C?.staticInt); Expect.equals(2, h.C.staticInt); } /// 30: ok
+
   // The static type of ++e1?.v is the same as the static type of e1.v + 1.
   { D d = new D(new E()); F f = ++d?.v; Expect.identical(d.v, f); } /// 11: ok
   { D d = new D(new E()); H h = ++d?.v; Expect.identical(d.v, h); } /// 12: static type warning
+  { D.staticE = new E(); F f = ++D?.staticE; Expect.identical(D.staticE, f); } /// 31: ok
+  { h.D.staticE = new h.E(); h.F f = ++h.D?.staticE; Expect.identical(h.D.staticE, f); } /// 32: ok
+  { D.staticE = new E(); H h = ++D?.staticE; Expect.identical(D.staticE, h); } /// 33: static type warning
+  { h.D.staticE = new h.E(); h.H hh = ++h.D?.staticE; Expect.identical(h.D.staticE, hh); } /// 34: static type warning
 
-  // --e1?.v is equivalent to e1?.v += 1.
+  // --e1?.v is equivalent to e1?.v -= 1.
   Expect.equals(null, --nullC()?.v); /// 13: ok
   { C c = new C(1); Expect.equals(0, --c?.v); Expect.equals(0, c.v); } /// 14: ok
 
+  // --C?.v is equivalent to C?.v -= 1.
+  { C.staticInt = 1; Expect.equals(0, --C?.staticInt); Expect.equals(0, C.staticInt); } /// 35: ok
+  { h.C.staticInt = 1; Expect.equals(0, --h.C?.staticInt); Expect.equals(0, h.C.staticInt); } /// 36: ok
+
   // The static type of --e1?.v is the same as the static type of e1.v - 1.
   { D d = new D(new E()); F f = --d?.v; Expect.identical(d.v, f); } /// 15: ok
   { D d = new D(new E()); H h = --d?.v; Expect.identical(d.v, h); } /// 16: static type warning
+  { D.staticE = new E(); F f = --D?.staticE; Expect.identical(D.staticE, f); } /// 37: ok
+  { h.D.staticE = new h.E(); h.F f = --h.D?.staticE; Expect.identical(h.D.staticE, f); } /// 38: ok
+  { D.staticE = new E(); H h = --D?.staticE; Expect.identical(D.staticE, h); } /// 39: static type warning
+  { h.D.staticE = new h.E(); h.H hh = --h.D?.staticE; Expect.identical(h.D.staticE, hh); } /// 40: static type warning
 }