public override void CloseScope(ILBuilder builder)
{
Debug.Assert(_handlers.Count > 1);
// Fix up the NextExceptionHandler reference of each leader block.
ExceptionHandlerScope tryScope = _handlers[0];
ExceptionHandlerLeaderBlock previousBlock = tryScope.LeaderBlock;
for (int i = 1; i < _handlers.Count; i++)
{
ExceptionHandlerScope handlerScope = _handlers[i];
ExceptionHandlerLeaderBlock nextBlock = handlerScope.LeaderBlock;
previousBlock.NextExceptionHandler = nextBlock;
previousBlock = nextBlock;
}
// Generate label for try/catch "leave" target.
builder.MarkLabel(_endLabel);
// hide the following code, since it could be reached through the label above.
builder.DefineHiddenSequencePoint();
Debug.Assert(builder._currentBlock == builder._labelInfos[_endLabel].bb);
if (_handlers[1].Type == ScopeType.Finally)
{
// Generate "nop" branch to itself. If this block is unreachable
// (because the finally block does not complete), the "nop" will be
// replaced by Br_s. On the other hand, if this block is reachable,
// the "nop" will be skipped so any "leave" instructions jumping
// to this block will jump to the next instead.
builder.EmitBranch(ILOpCode.Nop, _endLabel);
_handlers[1].SetBlockedByFinallyDestination(_endLabel);
}
}