Adding visitors to regurgitate expression types or reset them.

test/cctest/expression-type-collector-macros.h

+// Copyright 2015 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef V8_EXPRESSION_TYPE_COLLECTOR_MACROS_H_
+#define V8_EXPRESSION_TYPE_COLLECTOR_MACROS_H_
+
+#define CHECK_TYPES_BEGIN \
+  {                       \
+    size_t index = 0;     \
+    int depth = 0;
+
+#define CHECK_TYPES_END          \
+  CHECK_EQ(index, types.size()); \
+  }
+
+#define DEFAULT_TYPE Bounds::Unbounded(handles.main_zone())
+#define INT32_TYPE                            \
+  Bounds(Type::Signed32(handles.main_zone()), \
+         Type::Signed32(handles.main_zone()))
+
+#define CHECK_EXPR(ekind, type)                     \
+  CHECK_LT(index, types.size());                    \
+  CHECK(strcmp(#ekind, types[index].kind) == 0);    \
+  CHECK_EQ(depth, types[index].depth);              \
+  CHECK(type.lower->Is(types[index].bounds.lower)); \
+  CHECK(type.upper->Is(types[index].bounds.upper)); \
+  for (int j = (++depth, ++index, 0); j < 1 ? 1 : (--depth, 0); ++j)
+
+#define CHECK_VAR(vname, type)                                     \
+  CHECK_EXPR(VariableProxy, type);                                 \
+  CHECK_EQ(#vname, std::string(types[index - 1].name->raw_data(),  \
+                               types[index - 1].name->raw_data() + \
+                                   types[index - 1].name->byte_length()));
+
+#endif  // V8_EXPRESSION_TYPE_COLLECTOR_MACROS_H_