Source positions for constructors and lots of async machinery

runtime/vm/token.cc

Index: runtime/vm/token.cc
diff --git a/runtime/vm/token.cc b/runtime/vm/token.cc
index 75872e5d1077087923eb9636641cb6bfbac30f96..504b6d90a81bd40c4587503f83096ba6bbc322d5 100644
--- a/runtime/vm/token.cc
+++ b/runtime/vm/token.cc
@@ -78,4 +78,21 @@ bool Token::IsUnaryArithmeticOperator(Token::Kind token) {
 }
 
 
+const char* ClassifyingTokenPositions::ToCString(intptr_t token_pos) {
+  ASSERT(token_pos < Token::kMinSourcePos);
+  COMPILE_ASSERT(ClassifyingTokenPositions::kPrivate ==
+                 (Token::kNoSourcePos - 1));
+  COMPILE_ASSERT(kLast < kPrivate);
+  switch (token_pos) {
+    case Token::kNoSourcePos: return "NoSource";
+#define DEFINE_CASE(name, value)                                               \
+    case value: return #name;
+    CLASSIFYING_TOKEN_POSITIONS(DEFINE_CASE);
+#undef DEFINE_CASE
+    default:
+      UNIMPLEMENTED();
+      return NULL;
+  }
+}
+
 }  // namespace dart