// in unreachable code, for instance.
//
- if (warn)
+ bool unreachable = false;
+ if (warn && !ec.UnreachableReported) {
+ ec.UnreachableReported = true;
+ unreachable = true;
ec.Report.Warning (162, 2, loc, "Unreachable code detected");
+ }
ec.StartFlowBranching (FlowBranching.BranchingType.Block, loc);
bool ok = Resolve (ec);
ec.KillFlowBranching ();
+ if (unreachable) {
+ ec.UnreachableReported = false;
+ }
+
return ok;
}
#endif
// int assignable_slots;
- bool unreachable_shown;
- bool unreachable;
-
+
public Block (Block parent, Location start, Location end)
: this (parent, 0, start, end)
{
Block prev_block = ec.CurrentBlock;
bool ok = true;
+ bool unreachable = ec.IsUnreachable;
+ bool prev_unreachable = unreachable;
ec.CurrentBlock = this;
ec.StartFlowBranching (this);
if (s is EmptyStatement)
continue;
- if (!unreachable_shown && !(s is LabeledStatement)) {
+ if (!ec.UnreachableReported && !(s is LabeledStatement)) {
ec.Report.Warning (162, 2, s.loc, "Unreachable code detected");
- unreachable_shown = true;
+ ec.UnreachableReported = true;
}
-
- Block c_block = s as Block;
- if (c_block != null)
- c_block.unreachable = c_block.unreachable_shown = true;
}
//
statements [ix] = new EmptyStatement (s.loc);
unreachable = ec.CurrentBranching.CurrentUsageVector.IsUnreachable;
- if (unreachable && s is LabeledStatement)
- throw new InternalErrorException ("should not happen");
+ if (unreachable) {
+ ec.IsUnreachable = true;
+ } else if (ec.IsUnreachable)
+ ec.IsUnreachable = false;
+ }
+
+ if (unreachable != prev_unreachable) {
+ ec.IsUnreachable = prev_unreachable;
+ ec.UnreachableReported = false;
}
while (ec.CurrentBranching is FlowBranchingLabeled)
public override bool ResolveUnreachable (BlockContext ec, bool warn)
{
- unreachable_shown = true;
- unreachable = true;
-
- if (warn)
+ bool unreachable = false;
+ if (warn && !ec.UnreachableReported) {
+ ec.UnreachableReported = true;
+ unreachable = true;
ec.Report.Warning (162, 2, loc, "Unreachable code detected");
+ }
var fb = ec.StartFlowBranching (FlowBranching.BranchingType.Block, loc);
fb.CurrentUsageVector.IsUnreachable = true;
bool ok = Resolve (ec);
ec.KillFlowBranching ();
+ if (unreachable)
+ ec.UnreachableReported = false;
+
return ok;
}