public static bool ShouldImportMethod(this PEModule module, TypeDefinitionHandle typeDef, MethodDefinitionHandle methodDef, MetadataImportOptions importOptions)
{
try
{
var flags = module.GetMethodDefFlagsOrThrow(methodDef);
// If the method is virtual, it must be accessible, although
// it may be an explicit (private) interface implementation.
// Otherwise, we need to check the accessibility.
if ((flags & MethodAttributes.Virtual) == 0 && !acceptBasedOnAccessibility(importOptions, flags) &&
((flags & MethodAttributes.Static) == 0 || !isMethodImpl(typeDef, methodDef)))
{
return(false);
}
}
catch (BadImageFormatException)
{ }
try
{
// As in the native C# compiler (see IMPORTER::ImportMethod), drop any method prefixed
// with "_VtblGap". They should be impossible to call/implement/etc.
// BREAK: The native VB compiler does not drop such methods, but it produces unverifiable
// code when they are called, so the break is acceptable.
// TODO: Keep some record of vtable gaps (DevDiv #17472).
var name = module.GetMethodDefNameOrThrow(methodDef);
return(!name.StartsWith(VTableGapMethodNamePrefix, StringComparison.Ordinal));
}
catch (BadImageFormatException)
{
return(true);
}