Cleanup of error and warning reporting.

runtime/vm/report.h

Index: runtime/vm/report.h
===================================================================
--- runtime/vm/report.h	(revision 0)
+++ runtime/vm/report.h	(revision 0)
@@ -0,0 +1,84 @@
+// Copyright (c) 2014, 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_REPORT_H_
+#define VM_REPORT_H_
+
+#include "vm/allocation.h"
+
+namespace dart {
+
+// Forward declarations.
+class Error;
+class ICData;
+class RawString;
+class Script;
+class StackFrame;
+class String;
+
+class Report : AllStatic {
+ public:
+  enum Kind {
+    kWarning,
+    kJSWarning,
+    kError,
+    kMalformedType,
+    kMalboundedType,
+    kBailout,
+  };
+
+  // Report an already formatted error via a long jump.
+  static void LongJump(const Error& error);
+
+  // Concatenate and report an already formatted error and a new error message.
+  static void LongJumpF(const Error& prev_error,
+                        const Script& script, intptr_t token_pos,
+                        const char* format, ...) PRINTF_ATTRIBUTE(4, 5);
+  static void LongJumpV(const Error& prev_error,
+                        const Script& script, intptr_t token_pos,
+                        const char* format, va_list args);
+
+  // Report a warning/jswarning/error/bailout message.
+  static void MessageF(Kind kind, const Script& script, intptr_t token_pos,
+                       const char* format, ...) PRINTF_ATTRIBUTE(4, 5);
+  static void MessageV(Kind kind, const Script& script, intptr_t token_pos,
+                       const char* format, va_list args);
+
+  // Support to report Javascript compatibility warnings. Note that a
+  // JavascriptCompatibilityError is thrown if --warning_as_error is specified.
+  // If a warning is issued by the various JSWarning calls, the warning is also
+  // emitted in the trace buffer of the current isolate.
+
+  // Report a Javascript compatibility warning at the call site given by
+  // ic_data, unless one has already been emitted at that location.
+  static void JSWarningFromIC(const ICData& ic_data, const char* msg);
+
+  // Report a Javascript compatibility warning at the current native call,
+  // unless one has already been emitted at that location.
+  static void JSWarningFromNative(bool is_static_native, const char* msg);
+
+  // Report a Javascript compatibility warning at the call site given by
+  // caller_frame.
+  static void JSWarningFromFrame(StackFrame* caller_frame, const char* msg);
+
+  // Prepend a source snippet to the message.
+  // A null script means no source and a negative token_pos means no position.
+  static RawString* PrependSnippet(Kind kind,
+                                   const Script& script,
+                                   intptr_t token_pos,
+                                   const String& message);
+
+ private:
+  // Emit a Javascript compatibility warning to the current trace buffer.
+  static void TraceJSWarning(const Script& script,
+                             intptr_t token_pos,
+                             const String& message);
+
+  DISALLOW_COPY_AND_ASSIGN(Report);
+};
+
+}  // namespace dart
+
+#endif  // VM_REPORT_H_
+