Add the c++ code part of bindings2/

sky/engine/bindings2/exception_messages.h

Index: sky/engine/bindings2/exception_messages.h
diff --git a/sky/engine/bindings2/exception_messages.h b/sky/engine/bindings2/exception_messages.h
new file mode 100644
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+++ b/sky/engine/bindings2/exception_messages.h
@@ -0,0 +1,155 @@
+// Copyright 2015 The Chromium 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 SKY_ENGINE_BINDINGS2_EXCEPTIONMESSAGES_H_
+#define SKY_ENGINE_BINDINGS2_EXCEPTIONMESSAGES_H_
+
+#include "sky/engine/wtf/MathExtras.h"
+#include "sky/engine/wtf/text/StringBuilder.h"
+#include "sky/engine/wtf/text/WTFString.h"
+
+namespace blink {
+
+class Decimal;
+
+class ExceptionMessages {
+ public:
+  enum BoundType {
+    InclusiveBound,
+    ExclusiveBound,
+  };
+
+  static String argumentNullOrIncorrectType(int argumentIndex,
+                                            const String& expectedType);
+  static String constructorNotCallableAsFunction(const char* type);
+
+  static String failedToConstruct(const char* type, const String& detail);
+  static String failedToEnumerate(const char* type, const String& detail);
+  static String failedToExecute(const char* method,
+                                const char* type,
+                                const String& detail);
+  static String failedToGet(const char* property,
+                            const char* type,
+                            const String& detail);
+  static String failedToSet(const char* property,
+                            const char* type,
+                            const String& detail);
+  static String failedToDelete(const char* property,
+                               const char* type,
+                               const String& detail);
+  static String failedToGetIndexed(const char* type, const String& detail);
+  static String failedToSetIndexed(const char* type, const String& detail);
+  static String failedToDeleteIndexed(const char* type, const String& detail);
+
+  template <typename NumType>
+  static String formatNumber(NumType number) {
+    return formatFiniteNumber(number);
+  }
+
+  static String incorrectPropertyType(const String& property,
+                                      const String& detail);
+
+  template <typename NumberType>
+  static String indexExceedsMaximumBound(const char* name,
+                                         NumberType given,
+                                         NumberType bound) {
+    bool eq = given == bound;
+    StringBuilder result;
+    result.appendLiteral("The ");
+    result.append(name);
+    result.appendLiteral(" provided (");
+    result.append(formatNumber(given));
+    result.appendLiteral(") is greater than ");
+    result.append(eq ? "or equal to " : "");
+    result.appendLiteral("the maximum bound (");
+    result.append(formatNumber(bound));
+    result.appendLiteral(").");
+    return result.toString();
+  }
+
+  template <typename NumberType>
+  static String indexExceedsMinimumBound(const char* name,
+                                         NumberType given,
+                                         NumberType bound) {
+    bool eq = given == bound;
+    StringBuilder result;
+    result.appendLiteral("The ");
+    result.append(name);
+    result.appendLiteral(" provided (");
+    result.append(formatNumber(given));
+    result.appendLiteral(") is less than ");
+    result.append(eq ? "or equal to " : "");
+    result.appendLiteral("the minimum bound (");
+    result.append(formatNumber(bound));
+    result.appendLiteral(").");
+    return result.toString();
+  }
+
+  template <typename NumberType>
+  static String indexOutsideRange(const char* name,
+                                  NumberType given,
+                                  NumberType lowerBound,
+                                  BoundType lowerType,
+                                  NumberType upperBound,
+                                  BoundType upperType) {
+    StringBuilder result;
+    result.appendLiteral("The ");
+    result.append(name);
+    result.appendLiteral(" provided (");
+    result.append(formatNumber(given));
+    result.appendLiteral(") is outside the range ");
+    result.append(lowerType == ExclusiveBound ? '(' : '[');
+    result.append(formatNumber(lowerBound));
+    result.appendLiteral(", ");
+    result.append(formatNumber(upperBound));
+    result.append(upperType == ExclusiveBound ? ')' : ']');
+    result.append('.');
+    return result.toString();
+  }
+
+  static String invalidArity(const char* expected, unsigned provided);
+
+  // If  > 0, the argument index that failed type check (1-indexed.)
+  // If == 0, a (non-argument) value (e.g., a setter) failed the same check.
+  static String notAnArrayTypeArgumentOrValue(int argumentIndex);
+  static String notASequenceTypeProperty(const String& propertyName);
+  static String notAFiniteNumber(double value,
+                                 const char* name = "value provided");
+  static String notAFiniteNumber(const Decimal& value,
+                                 const char* name = "value provided");
+
+  static String notEnoughArguments(unsigned expected, unsigned provided);
+
+  static String readOnly(const char* detail = 0);
+
+ private:
+  template <typename NumType>
+  static String formatFiniteNumber(NumType number) {
+    if (number > 1e20 || number < -1e20)
+      return String::format("%e", 1.0 * number);
+    return String::number(number);
+  }
+
+  template <typename NumType>
+  static String formatPotentiallyNonFiniteNumber(NumType number) {
+    if (std::isnan(number))
+      return "NaN";
+    if (std::isinf(number))
+      return number > 0 ? "Infinity" : "-Infinity";
+    if (number > 1e20 || number < -1e20)
+      return String::format("%e", number);
+    return String::number(number);
+  }
+
+  static String ordinalNumber(int number);
+};
+
+template <>
+String ExceptionMessages::formatNumber<float>(float number);
+template <>
+String ExceptionMessages::formatNumber<double>(double number);
+
+}  // namespace blink
+
+#endif  // SKY_ENGINE_BINDINGS2_EXCEPTIONMESSAGES_H_