/// <summary>
/// Rewrites Try/Catch part of the Try/Catch/Finally
/// </summary>
private Statement RewriteFinalizedRegion(TryStatement node)
{
var rewrittenTry = (Block)Visit(node.ProtectedBlock);
var catches = node.ExceptionHandlers;
if (catches.IsEmpty)
{
return(rewrittenTry);
}
var origAwaitCatchFrame = _currentAwaitCatchFrame;
_currentAwaitCatchFrame = null;
Visit(node.ExceptionHandlers);
Statement tryWithCatches = new TryStatement {
EnsureBlock = rewrittenTry
};
((TryStatement)tryWithCatches).ExceptionHandlers = node.ExceptionHandlers;
var currentAwaitCatchFrame = _currentAwaitCatchFrame;
if (currentAwaitCatchFrame != null)
{
var handledLabel = _F.CreateLabel(tryWithCatches, CompilerContext.Current.GetUniqueName("handled"), _tryDepth);
var handlersList = currentAwaitCatchFrame.handlers;
_tryDepth = node.GetAncestors <TryStatement>().Count() + 1;
var handlers = new List <Statement> {
_F.CreateGoto(handledLabel, _tryDepth)
};
for (int i = 0, l = handlersList.Count; i < l; i++)
{
handlers.Add(
new Block(
handlersList[i],
_F.CreateGoto(handledLabel, _tryDepth)));
}
_containingMethod.Locals.Add(currentAwaitCatchFrame.pendingCaughtException.Local);
_containingMethod.Locals.Add(currentAwaitCatchFrame.pendingCatch.Local);
_containingMethod.Locals.AddRange(currentAwaitCatchFrame.GetHoistedLocals().Select(l => l.Local));
tryWithCatches = new Block(
new ExpressionStatement(
_F.CreateAssignment(
_F.CreateLocalReference(currentAwaitCatchFrame.pendingCatch),
_F.CreateDefaultInvocation(LexicalInfo.Empty, currentAwaitCatchFrame.pendingCatch.Type))),
tryWithCatches,
CreateSwitch(handlers, handledLabel, currentAwaitCatchFrame.pendingCatch));
}
_currentAwaitCatchFrame = origAwaitCatchFrame;
return(tryWithCatches);
}
