Add a limited version of ParameterMirrors that can only tell whether they are

runtime/include/dart_api.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 INCLUDE_DART_API_H_
 #define INCLUDE_DART_API_H_
 
 /** \mainpage Dart Embedding API Reference
  *
  * Dart is a class-based programming language for creating structured
@@ skipping 2105 matching lines @@
  *
  * \param function A handle to a function or method declaration.
  * \param is_static Returns whether the function or method is a setter.
  *
  * \return A valid handle if no error occurs during the operation.
  */
 DART_EXPORT Dart_Handle Dart_FunctionIsSetter(Dart_Handle function,
                                               bool* is_setter);
 
 /**
+ * Determines the number of required and optional parameters.
+ *
+ * \param function A handle to a function or method declaration.
+ * \param fixed_param_count Returns the number of required parameters.
+ * \param opt_param_count Returns the number of optional parameters.
+ *
+ * \return A valid handle if no error occurs during the operation.
+ */
+DART_EXPORT Dart_Handle Dart_FunctionParameterCounts(
+  Dart_Handle function,
+  int64_t* fixed_param_count,
+  int64_t* opt_param_count);
+
+/**
  * Returns a list of the names of all variables declared in a library
  * or class.
  *
  * \param target A library or class.
  *
  * \return If no error occurs, a list of strings is returned.
  *   Otherwise an erorr handle is returned.
  */
 DART_EXPORT Dart_Handle Dart_GetVariableNames(Dart_Handle target);
 
@@ skipping 431 matching lines @@
 // information that can be used for better profile reports for
 // dynamically generated code.
 DART_EXPORT void Dart_InitPprofSupport();
 DART_EXPORT void Dart_GetPprofSymbolInfo(void** buffer, int* buffer_size);
 
 // Support for generating flow graph compiler debugging output into a file.
 typedef void (*FileWriterFunction)(const char* buffer, int64_t num_bytes);
 DART_EXPORT void Dart_InitFlowGraphPrinting(FileWriterFunction function);
 
 #endif  // INCLUDE_DART_API_H_