Source positions for constructors and lots of async machinery

runtime/vm/token.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_TOKEN_H_
 #define VM_TOKEN_H_
 
 #include "platform/assert.h"
+#include "vm/allocation.h"
 
 namespace dart {
 
 //  Operator precedence table
 //
 //  14  multiplicative  * / ~/ %
 //  13  additive        + -
 //  12  shift           << >>
 //  11  bitwise and     &
 //  10  bitwise xor     ^
@@ skipping 190 matching lines @@
   enum Attribute {
     kNoAttribute     = 0,
     kKeyword         = 1 << 0,
     kPseudoKeyword   = 1 << 1,
   };
 
   static const Kind kFirstKeyword = kABSTRACT;
   static const Kind kLastKeyword = kWITH;
   static const int kNumKeywords = kLastKeyword - kFirstKeyword + 1;
 
+  static const intptr_t kNoSourcePos = -1;
+
   static bool IsAssignmentOperator(Kind tok) {
     return kASSIGN <= tok && tok <= kASSIGN_COND;
   }
 
   static bool IsRelationalOperator(Kind tok) {
     return kLT <= tok && tok <= kGTE;
   }
 
   static bool IsEqualityOperator(Kind tok) {
     return kEQ <= tok && tok <= kNE_STRICT;
@@ skipping 93 matching lines @@
   }
 
  private:
   static const char* name_[];
   static const char* tok_str_[];
   static const uint8_t precedence_[];
   static const Attribute attributes_[];
 };
 
 
+// These token positions are used to classify instructions that can't be
+// directly tied to an actual source position.
+#define CLASSIFYING_TOKEN_POSITIONS(V)                                         \
+    V(Private, -2)                                                             \
+    V(Box, -3)                                                                 \
+    V(ParallelMove, -4)                                                        \
+    V(TempMove, -5)                                                            \
+    V(Constant, -6)                                                            \
+    V(PushArgument, -7)                                                        \
+    V(ControlFlow, -8)                                                         \
+    V(Context, -9)                                                             \
+    V(MethodExtractor, -10)
+
+// COMPILE_ASSERT that all CLASSIFYING_TOKEN_POSITIONS are less than
+// Token::kNoSourcePos.
+#define SANITY_CHECK_VALUES(name, value)                                       \
+  COMPILE_ASSERT(value < Token::kNoSourcePos);
+  CLASSIFYING_TOKEN_POSITIONS(SANITY_CHECK_VALUES);
+#undef SANITY_CHECK_VALUES
+
+class ClassifyingTokenPositions : public AllStatic {
+ public:
+#define DEFINE_VALUES(name, value)                                             \
+  static const intptr_t k##name = value;
+  CLASSIFYING_TOKEN_POSITIONS(DEFINE_VALUES);
+#undef DEFINE_VALUES
+
+  static const char* ToCString(intptr_t token_pos) {
+    ASSERT(token_pos < 0);
+    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
 
 #endif  // VM_TOKEN_H_