Expression Evaluation Interfaces

The following are the Expression Evaluation Interfaces for the Visual Studio Debugging SDK.

Discussion

These interfaces are used to evaluate expressions in a call stack during break mode. They are implemented only for common language run-time expression evaluators (EE).

Each interface in the table shows the component that can implement it from the following list:

• Debug Engine (DE)

• Expression Evaluator (EE)

• Visual Studio (VS)

Interface	Implemented by	Description
IDebugAlias	EE	Represents a numeric alias for a variable.
IDebugAlias2	EE	Represents a numeric alias for a variable, and enables an expression evaluator (EE) to obtain the application domain for the alias.
IDebugArrayObject	EE	Represents an array object.
IDebugArrayObject2	EE	Represents a managed array object, and allows an expression evaluator (EE) to determine the base index (lower bounds) for the array.
IDebugBinder	DE	Represents a binder that binds debug symbols to actual addresses in memory.
IDebugBinder3	DE	Same as the IDebugBinder interface but provides access to types, aliases, and custom visualizers.
IDebugExpressionEvaluator	EE	Represents the expression evaluator.
IDebugExpressionEvaluator2	EE	Represents an enhanced version of an expression evaluator (EE).
IDebugExpressionEvaluator3	EE	Represents an expression evaluator (EE) with an enhanced parser tree.
IDebugFunctionObject	EE	Represents a function.
IDebugFunctionObject2	EE	Represents a function and enhances the IDebugFunctionObject interface.
IDebugIDECallback	DE	Enables an expression evaluator (EE) to display a message in the debugger's output window.
IDebugManagedObject	EE	Represents a managed code object.
IDebugObject	EE	Base interface that represents any symbol bound to a memory address.
IDebugObject2	EE	Same as the IDebugObject interface but provides access to additional information.
IDebugParsedExpression	EE	Represents a parsed expression ready to be evaluated.
IDebugPointerObject	EE	Represents a pointer.
IDebugPointerObject3	EE	Represents a pointer in a parse tree, and extends the IDebugPointerObject interface.
IEEVisualizerDataProvider	EE	Provides the ability to modify a type's value through a type visualizer.
IEEVisualizerService	VS	Provides access to custom viewers and type visualizers.
IEEVisualizerServiceProvider	VS	Provides the ability to create an IEEVisualizerService object.
IEnumDebugObjects	EE	Represents a collection of IDebugObject objects.

See Also

Concepts

API Reference (Visual Studio Debugging SDK)

Writing a Common Language Runtime Expression Evaluator

Type Visualizer and Custom Viewer