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https://github.com/nim-lang/Nim.git
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c3344862b0
This implements "deterministic" exception handling for Nim based on goto instead of setjmp. This means raising an exception is much cheaper than in C++'s table based implementations. Supports hard realtime systems. Default for --gc:arc and the C target because it's generally a good idea and arc is all about deterministic behavior. Note: This implies that fatal runtime traps are not catchable anymore! This needs to be documented.
118 lines
1.6 KiB
Nim
Executable File
118 lines
1.6 KiB
Nim
Executable File
discard """
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output: '''
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msg1
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msg2
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finally2
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finally1
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begin
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one iteration!
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caught!
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except1
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finally1
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caught! 2
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BEFORE
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FINALLY
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BEFORE
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EXCEPT
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FINALLY
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RECOVER
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BEFORE
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EXCEPT: IOError: hi
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FINALLY
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'''
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cmd: "nim c --gc:arc --exceptions:goto $file"
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"""
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#bug 7204
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proc nested_finally =
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try:
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raise newException(KeyError, "msg1")
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except KeyError as ex:
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echo ex.msg
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try:
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raise newException(ValueError, "msg2")
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except:
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echo getCurrentExceptionMsg()
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finally:
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echo "finally2"
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finally:
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echo "finally1"
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nested_finally()
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proc doraise =
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raise newException(ValueError, "gah")
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proc main =
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while true:
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try:
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echo "begin"
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doraise()
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finally:
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echo "one ", "iteration!"
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try:
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main()
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except:
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echo "caught!"
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when true:
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proc p =
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try:
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raise newException(Exception, "Hello")
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except:
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echo "except1"
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raise
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finally:
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echo "finally1"
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try:
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p()
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except:
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echo "caught! 2"
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proc noException =
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try:
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echo "BEFORE"
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except:
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echo "EXCEPT"
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raise
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finally:
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echo "FINALLY"
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try: noException()
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except: echo "RECOVER"
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proc reraise_in_except =
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try:
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echo "BEFORE"
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raise newException(IOError, "")
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except IOError:
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echo "EXCEPT"
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raise
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finally:
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echo "FINALLY"
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try: reraise_in_except()
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except: echo "RECOVER"
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proc return_in_except =
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try:
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echo "BEFORE"
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raise newException(IOError, "hi")
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except:
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echo "EXCEPT: ", getCurrentException().name, ": ", getCurrentExceptionMsg()
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return
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finally:
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echo "FINALLY"
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try: return_in_except()
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except: echo "RECOVER"
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