class

Exception

Represents errors that occur during application execution.

Exception and its descendants are used to communicate between raise and rescue statements in begin ... end blocks. Exception objects carry information about the exception – its type (the exception’s class name), an optional descriptive string, and optional traceback information. Exception subclasses may add additional information.

Constructors

new(message : String | Nil = nil, cause : Exception | Nil = nil)

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Instance methods

backtrace

Returns any backtrace associated with the exception. The backtrace is an array of strings, each containing “0xAddress: Function at File Line Column”.

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backtrace?

Returns any backtrace associated with the exception if the call stack exists. The backtrace is an array of strings, each containing “0xAddress: Function at File Line Column”.

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cause

Returns the previous exception at the time this exception was raised. This is useful for wrapping exceptions and retaining the original exception information.

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inspect(io : IO) : Nil

Appends a String representation of this object which includes its class name, its object address and the values of all instance variables.

class Person
  def initialize(@name : String, @age : Int32)
  end
end

Person.new("John", 32).inspect # => #<Person:0x10fd31f20 @name="John", @age=32>

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inspect_with_backtrace(io : IO) : Nil

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inspect_with_backtrace

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message

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to_s(io : IO) : Nil

Appends a short String representation of this object which includes its class name and its object address.

class Person
  def initialize(@name : String, @age : Int32)
  end
end

Person.new("John", 32).to_s # => #<Person:0x10a199f20>

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