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IDebugCustomAttributeQuery::IsCustomAttributeDefined

  • Article

Determines if the specified custom attribute is defined.

Syntax

int IsCustomAttributeDefined(
    string pszCustomAttributeName
);

Parameters

pszCustomAttributeName
[in] Name of the custom attribute.

Return Value

If the custom attribute is defined, returns S_OK; otherwise, returns S_FALSE.

Example

The following example shows how to implement this method for a CDebugClassFieldSymbol object that exposes the IDebugCustomAttributeQuery interface.

HRESULT CDebugClassFieldSymbol::IsCustomAttributeDefined(
    LPCOLESTR pszCustomAttribute
)
{
    HRESULT hr = S_FALSE;
    CComPtr<IMetaDataImport> pMetadata;
    mdToken token = mdTokenNil;
    CComPtr<IDebugField> pField;
    CComPtr<IDebugCustomAttributeQuery> pCA;

    ASSERT(IsValidWideStringPtr(pszCustomAttribute));

    METHOD_ENTRY( CDebugClassFieldSymbol::IsCustomAttributeDefined );

    IfFalseGo( pszCustomAttribute, E_INVALIDARG );

    IfFailGo( m_spSH->GetMetadata( m_spAddress->GetModule(), &pMetadata ) );

    IfFailGo( CDebugCustomAttribute::GetTokenFromAddress( m_spAddress, &token) );
    IfFailGo( pMetadata->GetCustomAttributeByName( token,
              pszCustomAttribute,
              NULL,
              NULL ) );
Error:

    METHOD_EXIT( CDebugClassFieldSymbol::IsCustomAttributeDefined, hr );

    if (hr != S_OK)
    {
        hr = S_FALSE;
    }

    return hr;
}

See also