# Set this mark to skip the evaluation until a labeled statement catch it with `is_escape`
var escapemark: nullable EscapeMark = null
- # Is an abort being executed ?
- # Set this mark to return to the last `catch` bloc or effectively aborting if there isn't any
- var catch_mark = new EscapeMark
-
# The count of `catch` blocs that have been encountered and can catch an abort
var catch_count = 0
fatal(v, "Aborted")
exit(1)
else
- # Abort mode, skipping everything until a `catch` bloc is reached
- v.escapemark = v.catch_mark
+ abort
end
end
end
redef class ADoExpr
redef fun stmt(v)
do
- # If this bloc has a catch, register it in the counter
- if self.n_catch != null then v.catch_count += 1
- v.stmt(self.n_block)
- v.is_escape(self.break_mark) # Clear the break (if any)
+ # If this bloc has a catch, handle it with a do ... catch ... end
if self.n_catch != null then
- v.catch_count -= 1
- # Are we in abort mode? then this catch is executing
- if v.is_escape(v.catch_mark) then v.stmt(self.n_catch)
+ var frame = v.frame
+ v.catch_count += 1
+ do
+ v.stmt(self.n_block)
+ v.is_escape(self.break_mark) # Clear the break (if any)
+ v.catch_count -= 1
+ catch
+ # Restore the current frame if needed
+ while v.frame != frame do v.frames.shift
+ v.catch_count -= 1
+ v.stmt(self.n_catch)
+ end
+ else
+ v.stmt(self.n_block)
+ v.is_escape(self.break_mark)
end
end
end