// Copyright (c) 2013, 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.

part of dart2js.js_emitter;

/// Enables debugging of fast/slow objects using V8-specific primitives.
const DEBUG_FAST_OBJECTS = false;

/**
 * A convenient type alias for some functions that emit keyed values.
 */
typedef void DefineStubFunction(String invocationName, jsAst.Expression value);

/**
 * [member] is a field (instance, static, or top level).
 *
 * [name] is the field name that the [Namer] has picked for this field's
 * storage, that is, the JavaScript property name.
 *
 * [accessorName] is the name of the accessor. For instance fields this is
 * mostly the same as [name] except when [member] is shadowing a field in its
 * superclass.  For other fields, they are rarely the same.
 *
 * [needsGetter] and [needsSetter] represent if a getter or a setter
 * respectively is needed.  There are many factors in this, for example, if the
 * accessor can be inlined.
 *
 * [needsCheckedSetter] indicates that a checked getter is needed, and in this
 * case, [needsSetter] is always false. [needsCheckedSetter] is only true when
 * type assertions are enabled (checked mode).
 */
typedef void AcceptField(VariableElement member,
                         String name,
                         String accessorName,
                         bool needsGetter,
                         bool needsSetter,
                         bool needsCheckedSetter);

// Function signatures used in the generation of runtime type information.
typedef void FunctionTypeSignatureEmitter(Element method,
                                          FunctionType methodType);

// TODO(johnniwinther): Clean up terminology for rti in the emitter.
typedef void FunctionTypeTestEmitter(FunctionType functionType);

typedef void SubstitutionEmitter(Element element, {bool emitNull});

const String GENERATED_BY = """
// Generated by dart2js, the Dart to JavaScript compiler.
""";

const String HOOKS_API_USAGE = """
// The code supports the following hooks:
// dartPrint(message)   - if this function is defined it is called
//                        instead of the Dart [print] method.
// dartMainRunner(main) - if this function is defined, the Dart [main]
//                        method will not be invoked directly.
//                        Instead, a closure that will invoke [main] is
//                        passed to [dartMainRunner].
""";