diff options
Diffstat (limited to 'lib/system/exceptions.nim')
| -rw-r--r-- | lib/system/exceptions.nim | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/lib/system/exceptions.nim b/lib/system/exceptions.nim new file mode 100644 index 000000000..63588f858 --- /dev/null +++ b/lib/system/exceptions.nim @@ -0,0 +1,122 @@ +## Exception and effect types used in Nim code. + +type + TimeEffect* = object of RootEffect ## Time effect. + IOEffect* = object of RootEffect ## IO effect. + ReadIOEffect* = object of IOEffect ## Effect describing a read IO operation. + WriteIOEffect* = object of IOEffect ## Effect describing a write IO operation. + ExecIOEffect* = object of IOEffect ## Effect describing an executing IO operation. + +type + IOError* = object of CatchableError ## \ + ## Raised if an IO error occurred. + EOFError* = object of IOError ## \ + ## Raised if an IO "end of file" error occurred. + OSError* = object of CatchableError ## \ + ## Raised if an operating system service failed. + errorCode*: int32 ## OS-defined error code describing this error. + LibraryError* = object of OSError ## \ + ## Raised if a dynamic library could not be loaded. + ResourceExhaustedError* = object of CatchableError ## \ + ## Raised if a resource request could not be fulfilled. + ArithmeticDefect* = object of Defect ## \ + ## Raised if any kind of arithmetic error occurred. + DivByZeroDefect* = object of ArithmeticDefect ## \ + ## Raised for runtime integer divide-by-zero errors. + + OverflowDefect* = object of ArithmeticDefect ## \ + ## Raised for runtime integer overflows. + ## + ## This happens for calculations whose results are too large to fit in the + ## provided bits. + AccessViolationDefect* = object of Defect ## \ + ## Raised for invalid memory access errors + AssertionDefect* = object of Defect ## \ + ## Raised when assertion is proved wrong. + ## + ## Usually the result of using the `assert() template + ## <assertions.html#assert.t,untyped,string>`_. + ValueError* = object of CatchableError ## \ + ## Raised for string and object conversion errors. + KeyError* = object of ValueError ## \ + ## Raised if a key cannot be found in a table. + ## + ## Mostly used by the `tables <tables.html>`_ module, it can also be raised + ## by other collection modules like `sets <sets.html>`_ or `strtabs + ## <strtabs.html>`_. + OutOfMemDefect* = object of Defect ## \ + ## Raised for unsuccessful attempts to allocate memory. + IndexDefect* = object of Defect ## \ + ## Raised if an array index is out of bounds. + + FieldDefect* = object of Defect ## \ + ## Raised if a record field is not accessible because its discriminant's + ## value does not fit. + RangeDefect* = object of Defect ## \ + ## Raised if a range check error occurred. + StackOverflowDefect* = object of Defect ## \ + ## Raised if the hardware stack used for subroutine calls overflowed. + ReraiseDefect* = object of Defect ## \ + ## Raised if there is no exception to reraise. + ObjectAssignmentDefect* = object of Defect ## \ + ## Raised if an object gets assigned to its parent's object. + ObjectConversionDefect* = object of Defect ## \ + ## Raised if an object is converted to an incompatible object type. + ## You can use `of` operator to check if conversion will succeed. + FloatingPointDefect* = object of Defect ## \ + ## Base class for floating point exceptions. + FloatInvalidOpDefect* = object of FloatingPointDefect ## \ + ## Raised by invalid operations according to IEEE. + ## + ## Raised by `0.0/0.0`, for example. + FloatDivByZeroDefect* = object of FloatingPointDefect ## \ + ## Raised by division by zero. + ## + ## Divisor is zero and dividend is a finite nonzero number. + FloatOverflowDefect* = object of FloatingPointDefect ## \ + ## Raised for overflows. + ## + ## The operation produced a result that exceeds the range of the exponent. + FloatUnderflowDefect* = object of FloatingPointDefect ## \ + ## Raised for underflows. + ## + ## The operation produced a result that is too small to be represented as a + ## normal number. + FloatInexactDefect* = object of FloatingPointDefect ## \ + ## Raised for inexact results. + ## + ## The operation produced a result that cannot be represented with infinite + ## precision -- for example: `2.0 / 3.0, log(1.1)` + ## + ## **Note**: Nim currently does not detect these! + DeadThreadDefect* = object of Defect ## \ + ## Raised if it is attempted to send a message to a dead thread. + NilAccessDefect* = object of Defect ## \ + ## Raised on dereferences of `nil` pointers. + ## + ## This is only raised if the `segfaults module <segfaults.html>`_ was imported! + +when not defined(nimPreviewSlimSystem): + type + ArithmeticError* {.deprecated: "See corresponding Defect".} = ArithmeticDefect + DivByZeroError* {.deprecated: "See corresponding Defect".} = DivByZeroDefect + OverflowError* {.deprecated: "See corresponding Defect".} = OverflowDefect + AccessViolationError* {.deprecated: "See corresponding Defect".} = AccessViolationDefect + AssertionError* {.deprecated: "See corresponding Defect".} = AssertionDefect + OutOfMemError* {.deprecated: "See corresponding Defect".} = OutOfMemDefect + IndexError* {.deprecated: "See corresponding Defect".} = IndexDefect + + FieldError* {.deprecated: "See corresponding Defect".} = FieldDefect + RangeError* {.deprecated: "See corresponding Defect".} = RangeDefect + StackOverflowError* {.deprecated: "See corresponding Defect".} = StackOverflowDefect + ReraiseError* {.deprecated: "See corresponding Defect".} = ReraiseDefect + ObjectAssignmentError* {.deprecated: "See corresponding Defect".} = ObjectAssignmentDefect + ObjectConversionError* {.deprecated: "See corresponding Defect".} = ObjectConversionDefect + FloatingPointError* {.deprecated: "See corresponding Defect".} = FloatingPointDefect + FloatInvalidOpError* {.deprecated: "See corresponding Defect".} = FloatInvalidOpDefect + FloatDivByZeroError* {.deprecated: "See corresponding Defect".} = FloatDivByZeroDefect + FloatOverflowError* {.deprecated: "See corresponding Defect".} = FloatOverflowDefect + FloatUnderflowError* {.deprecated: "See corresponding Defect".} = FloatUnderflowDefect + FloatInexactError* {.deprecated: "See corresponding Defect".} = FloatInexactDefect + DeadThreadError* {.deprecated: "See corresponding Defect".} = DeadThreadDefect + NilAccessError* {.deprecated: "See corresponding Defect".} = NilAccessDefect |