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November 19, 2010 00:44
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Standard Exceptions in Ruby (MRI 1.9 and 1.8) and how to generate them
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ruby-1.8.7-p302 > tree_printer.call tree | |
Exception | |
IRB::Abort | |
NoMemoryError | |
ScriptError | |
LoadError | |
NotImplementedError | |
SyntaxError | |
SignalException | |
Interrupt | |
StandardError | |
ArgumentError | |
Exception2MessageMapper::ErrNotRegisteredException | |
IOError | |
EOFError | |
IRB::CantChangeBinding | |
IRB::CantReturnToNormalMode | |
IRB::CantShiftToMultiIrbMode | |
IRB::IllegalParameter | |
IRB::IrbAlreadyDead | |
IRB::IrbSwitchedToCurrentThread | |
IRB::NoSuchJob | |
IRB::NotImplementedError | |
IRB::Notifier::ErrUndefinedNotifier | |
IRB::Notifier::ErrUnrecognizedLevel | |
IRB::SLex::ErrNodeAlreadyExists | |
IRB::SLex::ErrNodeNothing | |
IRB::UndefinedPromptMode | |
IRB::UnrecognizedSwitch | |
IndexError | |
StopIteration | |
LocalJumpError | |
NameError | |
NoMethodError | |
RangeError | |
FloatDomainError | |
RegexpError | |
RubyLex::AlreadyDefinedToken | |
RubyLex::SyntaxError | |
RubyLex::TerminateLineInput | |
RubyLex::TkReading2TokenDuplicateError | |
RubyLex::TkReading2TokenNoKey | |
RubyLex::TkSymbol2TokenNoKey | |
RuntimeError | |
SecurityError | |
SystemCallError | |
SystemStackError | |
ThreadError | |
TypeError | |
ZeroDivisionError | |
SystemExit | |
fatal | |
=> [Exception] |
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ruby-1.9.2-p0 > tree_printer.call tree | |
BasicObject | |
Exception | |
IRB::Abort | |
NoMemoryError | |
ScriptError | |
LoadError | |
NotImplementedError | |
SyntaxError | |
SecurityError | |
SignalException | |
Interrupt | |
StandardError | |
ArgumentError | |
EncodingError | |
Encoding::CompatibilityError | |
Encoding::ConverterNotFoundError | |
Encoding::InvalidByteSequenceError | |
Encoding::UndefinedConversionError | |
Exception2MessageMapper::ErrNotRegisteredException | |
FiberError | |
IOError | |
EOFError | |
IRB::CantChangeBinding | |
IRB::CantReturnToNormalMode | |
IRB::CantShiftToMultiIrbMode | |
IRB::IllegalParameter | |
IRB::IrbAlreadyDead | |
IRB::IrbSwitchedToCurrentThread | |
IRB::NoSuchJob | |
IRB::NotImplementedError | |
IRB::Notifier::ErrUndefinedNotifier | |
IRB::Notifier::ErrUnrecognizedLevel | |
IRB::SLex::ErrNodeAlreadyExists | |
IRB::SLex::ErrNodeNothing | |
IRB::UndefinedPromptMode | |
IRB::UnrecognizedSwitch | |
IndexError | |
KeyError | |
StopIteration | |
LocalJumpError | |
Math::DomainError | |
NameError | |
NoMethodError | |
RangeError | |
FloatDomainError | |
RegexpError | |
RubyLex::AlreadyDefinedToken | |
RubyLex::SyntaxError | |
RubyLex::TerminateLineInput | |
RubyLex::TkReading2TokenDuplicateError | |
RubyLex::TkReading2TokenNoKey | |
RubyLex::TkSymbol2TokenNoKey | |
RuntimeError | |
SystemCallError | |
ThreadError | |
TypeError | |
ZeroDivisionError | |
SystemExit | |
SystemStackError | |
fatal | |
=> [BasicObject] |
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exceptions = [] | |
tree = {} | |
ObjectSpace.each_object(Class) do |cls| | |
next unless cls.ancestors.include? Exception | |
next if exceptions.include? cls | |
next if cls.superclass == SystemCallError # avoid dumping Errno's | |
exceptions << cls | |
cls.ancestors.delete_if {|e| [Object, Kernel].include? e }.reverse.inject(tree) {|memo,cls| memo[cls] ||= {}} | |
end | |
indent = 0 | |
tree_printer = Proc.new do |t| | |
t.keys.sort { |c1,c2| c1.name <=> c2.name }.each do |k| | |
space = (' ' * indent); space ||= '' | |
puts space + k.to_s | |
indent += 2; tree_printer.call t[k]; indent -= 2 | |
end | |
end | |
tree_printer.call tree |
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