# core.exception

The exception module defines all system-level exceptions and provides a mechanism to alter system-level error handling.
License:
Distributed under the Boost Software License 1.0. (See accompanying file LICENSE)
Authors:
Sean Kelly and Jonathan M Davis
Source:

class RangeError: object.Error;
  Thrown on a range error.
class AssertError: object.Error;
  Thrown on an assert error.
class FinalizeError: object.Error;
  Thrown on finalize error.
class HiddenFuncError: object.Error;
  Thrown on hidden function error.
class OutOfMemoryError: object.Error;
  Thrown on an out of memory error.
class InvalidMemoryOperationError: object.Error;
  Thrown on an invalid memory operation.
  An invalid memory operation error occurs in circumstances when the garbage collector has detected an operation it cannot reliably handle. The default D GC is not re-entrant, so this can happen due to allocations done from within finalizers called during a garbage collection cycle.
class SwitchError: object.Error;
  Thrown on a switch error.
class UnicodeException: object.Exception;
  Thrown on a unicode conversion error.
alias AssertHandler = void function(string file, uint line, string msg) nothrow;
nothrow @property @trusted AssertHandler assertHandler();
nothrow @property @trusted void assertHandler(AssertHandler handler);
  Gets/sets assert hander. null means the default handler is used.
deprecated nothrow @trusted void setAssertHandler(AssertHandler h);
  Overrides the default assert hander with a user-supplied version. Deprecated. Please use instead.
  Params:

  AssertHandler h | The new assert handler. Set to null to use the default handler.

nothrow void onAssertError(string file = __FILE__, size_t line = __LINE__);
  A callback for assert errors in D. The user-supplied assert handler will be called if one has been supplied, otherwise an AssertError will be thrown.
  Params:

  string file | The name of the file that signaled this error.
  size_t line | The line number on which this error occurred.

nothrow void onAssertErrorMsg(string file, size_t line, string msg);
  A callback for assert errors in D. The user-supplied assert handler will be called if one has been supplied, otherwise an AssertError will be thrown.
  Params:

  string file | The name of the file that signaled this error.
  size_t line | The line number on which this error occurred.
  string msg | An error message supplied by the user.

nothrow void onUnittestErrorMsg(string file, size_t line, string msg);
  A callback for unittest errors in D. The user-supplied unittest handler will be called if one has been supplied, otherwise the error will be written to stderr.
  Params:

  string file | The name of the file that signaled this error.
  size_t line | The line number on which this error occurred.
  string msg | An error message supplied by the user.

pure nothrow @safe void onRangeError(string file = __FILE__, size_t line = __LINE__);
  A callback for array bounds errors in D. A RangeError will be thrown.
  Params:

  string file | The name of the file that signaled this error.
  size_t line | The line number on which this error occurred.

  Throws:
  RangeError.
pure nothrow @safe void onFinalizeError(ClassInfo info, Throwable e, string file = __FILE__, size_t line = __LINE__);
  A callback for finalize errors in D. A FinalizeError will be thrown.
  Params:

  ClassInfo info | The ClassInfo instance for the object that failed finalization.
  Throwable e | The exception thrown during finalization.
  string file | The name of the file that signaled this error.
  size_t line | The line number on which this error occurred.

  Throws:
  FinalizeError.
pure nothrow @safe void onHiddenFuncError(Object o);
  A callback for hidden function errors in D. A HiddenFuncError will be thrown.
  Throws:
  HiddenFuncError.
pure nothrow @trusted void onOutOfMemoryError(void* pretend_sideffect = null);
  A callback for out of memory errors in D. An OutOfMemoryError will be thrown.
  Throws:
  OutOfMemoryError.
pure nothrow @trusted void onInvalidMemoryOperationError(void* pretend_sideffect = null);
  A callback for invalid memory operations in D. An InvalidMemoryOperationError will be thrown.
  Throws:
  InvalidMemoryOperationError.
pure nothrow @safe void onSwitchError(string file = __FILE__, size_t line = __LINE__);
  A callback for switch errors in D. A SwitchError will be thrown.
  Params:

  string file | The name of the file that signaled this error.
  size_t line | The line number on which this error occurred.

  Throws:
  SwitchError.
pure @safe void onUnicodeError(string msg, size_t idx, string file = __FILE__, size_t line = __LINE__);
  A callback for unicode errors in D. A UnicodeException will be thrown.
  Params:

  string msg | Information about the error.
  size_t idx | String index where this error was detected.
  string file | The name of the file that signaled this error.
  size_t line | The line number on which this error occurred.

  Throws:
  UnicodeException.
void _d_assertm(immutable(ModuleInfo)* m, uint line);
  These functions must be defined for any D program linked against this library.
  Function calls to these are generated by the compiler and inserted into the object code.
void _d_assert_msg(string msg, string file, uint line);
  These functions must be defined for any D program linked against this library.
  Function calls to these are generated by the compiler and inserted into the object code.
void _d_assert(string file, uint line);
  These functions must be defined for any D program linked against this library.
  Function calls to these are generated by the compiler and inserted into the object code.
void _d_unittestm(immutable(ModuleInfo)* m, uint line);
  These functions must be defined for any D program linked against this library.
  Function calls to these are generated by the compiler and inserted into the object code.
void _d_unittest_msg(string msg, string file, uint line);
  These functions must be defined for any D program linked against this library.
  Function calls to these are generated by the compiler and inserted into the object code.
void _d_unittest(string file, uint line);
  These functions must be defined for any D program linked against this library.
  Function calls to these are generated by the compiler and inserted into the object code.
void _d_array_bounds(immutable(ModuleInfo)* m, uint line);
  These functions must be defined for any D program linked against this library.
  Function calls to these are generated by the compiler and inserted into the object code.
void _d_arraybounds(string file, uint line);
  These functions must be defined for any D program linked against this library.
  Function calls to these are generated by the compiler and inserted into the object code.
void _d_switch_error(immutable(ModuleInfo)* m, uint line);
  These functions must be defined for any D program linked against this library.
  Function calls to these are generated by the compiler and inserted into the object code.
void _d_hidden_func();
  These functions must be defined for any D program linked against this library.
  Function calls to these are generated by the compiler and inserted into the object code.

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