TYPE_INFO
This structure specifies various kinds of information about a field's type.
struct _tagTYPE_INFO_UNION {
dwTYPE_KIND dwKind;
union {
METADATA_TYPE typeMeta;
PDB_TYPE typePdb;
BUILT_TYPE typeBuilt;
DWORD unused;
} type;
} TYPE_INFO;
public struct TYPE_INFO {
public uint dwKind;
public IntPtr unionmember;
};
Parameters
dwKind
A value from the dwTYPE_KIND enumeration that determines how to interpret the union.type.typeMeta
[C++ only] Contains a METADATA_TYPE structure if dwKind is TYPE_KIND_METADATA.type.typePdb
[C++ only] Contains a PDB_TYPE structure if dwKind is TYPE_KIND_PDB.type.typeBuilt
[C++ only] Contains a BUILT_TYPE structure if dwKind is TYPE_KIND_BUILT.type.unused
Unused padding.type
Name of the union.unionmember
[C# only] Marshal this to the appropriate structure type based on dwKind.
Remarks
This structure is passed to the IDebugField::GetTypeInfo method where it is filled in. How the contents of the structure are interpreted is based on the dwKind field.
备注
[C++ only] If dwKind equals TYPE_KIND_BUILT, then it is necessary to release the underlying IDebugField object when destroying the TYPE_INFO structure. This is done by calling typeInfo.type.typeBuilt.pUnderlyingField->Release().
[C# only] The following table shows how to interpret the unionmember member for each kind of type. The Example shows how this is done for one kind of type.
dwKind |
unionmember interpreted as |
|---|---|
TYPE_KIND_METADATA |
|
TYPE_KIND_PDB |
|
TYPE_KIND_BUILT |
Example
This example shows how to interpret the unionmember member of the TYPE_INFO structure in C#. This example shows interpreting only one type (TYPE_KIND_METADATA) but the others are interpreted in exactly the same way.
using System;
using System.Runtime.Interop.Services;
using Microsoft.VisualStudio.Debugger.Interop;
namespace MyPackage
{
public class MyClass
{
public void Interpret(TYPE_INFO ti)
{
if (ti.dwKind == (uint)enum_dwTypeKind.TYPE_KIND_METADATA)
{
METADATA_TYPE dataType = (METADATA_TYPE)Marshal.PtrToStructure(ti.unionmember,
typeof(METADATA_TYPE));
}
}
}
}
Requirements
Header: sh.h
Namespace: Microsoft.VisualStudio.Debugger.Interop
Assembly: Microsoft.VisualStudio.Debugger.Interop.dll