class Exception
Overview
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.
Direct Known Subclasses
- ArgumentError
- Base64::Error
- Channel::ClosedError
- Compress::Deflate::Error
- Compress::Gzip::Error
- Compress::Zip::Error
- Compress::Zlib::Error
- Crypto::Bcrypt::Error
- CSV::Error
- Digest::FinalizedError
- DivisionByZeroError
- Enumerable::EmptyError
- Enumerable::NotFoundError
- File::BadPatternError
- HTTP::FormData::Error
- HTTP::Server::ClientError
- IndexError
- INI::ParseException
- InvalidBigDecimalException
- InvalidByteSequenceError
- IO::Error
- JSON::Error
- KeyError
- MIME::Error
- MIME::Multipart::Error
- NilAssertionError
- NotImplementedError
- OAuth2::Error
- OAuth::Error
- OpenSSL::Error
- OptionParser::Exception
- OverflowError
- Path::Error
- Regex::Error
- RuntimeError
- System::Group::NotFoundError
- System::User::NotFoundError
- Time::Error
- Time::Format::Error
- TypeCastError
- URI::Error
- UUID::Error
- XML::Error
- YAML::Error
Defined in:
exception.crConstructors
Instance Method Summary
-
#backtrace : Array(String)
Returns any backtrace associated with the exception.
-
#backtrace?
Returns any backtrace associated with the exception if the call stack exists.
-
#cause : Exception | Nil
Returns the previous exception at the time this exception was raised.
-
#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.
- #inspect_with_backtrace(io : IO) : Nil
- #inspect_with_backtrace : String
- #message : String | Nil
-
#to_s(io : IO) : Nil
Appends a short String representation of this object which includes its class name and its object address.
Instance methods inherited from class Reference
==(other : self)==(other : JSON::Any)
==(other : YAML::Any)
==(other) ==, dup dup, hash(hasher) hash, initialize initialize, inspect(io : IO) : Nil inspect, object_id : UInt64 object_id, pretty_print(pp) : Nil pretty_print, same?(other : Reference) : Bool
same?(other : Nil) same?, to_s(io : IO) : Nil to_s
Constructor methods inherited from class Reference
new
new,
unsafe_construct(address : Pointer, *args, **opts) : self
unsafe_construct
Class methods inherited from class Reference
pre_initialize(address : Pointer)
pre_initialize
Instance methods inherited from class Object
! : Bool
!,
!=(other)
!=,
!~(other)
!~,
==(other)
==,
===(other : JSON::Any)===(other : YAML::Any)
===(other) ===, =~(other) =~, as(type : Class) as, as?(type : Class) as?, class class, dup dup, hash(hasher)
hash hash, in?(collection : Object) : Bool
in?(*values : Object) : Bool in?, inspect(io : IO) : Nil
inspect : String inspect, is_a?(type : Class) : Bool is_a?, itself itself, nil? : Bool nil?, not_nil!(message)
not_nil! not_nil!, pretty_inspect(width = 79, newline = "\n", indent = 0) : String pretty_inspect, pretty_print(pp : PrettyPrint) : Nil pretty_print, responds_to?(name : Symbol) : Bool responds_to?, tap(&) tap, to_json(io : IO) : Nil
to_json : String to_json, to_pretty_json(indent : String = " ") : String
to_pretty_json(io : IO, indent : String = " ") : Nil to_pretty_json, to_s(io : IO) : Nil
to_s : String to_s, to_yaml(io : IO) : Nil
to_yaml : String to_yaml, try(&) try, unsafe_as(type : T.class) forall T unsafe_as
Class methods inherited from class Object
from_json(string_or_io, root : String)from_json(string_or_io) from_json, from_yaml(string_or_io : String | IO) from_yaml
Macros inherited from class Object
class_getter(*names, &block)
class_getter,
class_getter!(*names)
class_getter!,
class_getter?(*names, &block)
class_getter?,
class_property(*names, &block)
class_property,
class_property!(*names)
class_property!,
class_property?(*names, &block)
class_property?,
class_setter(*names)
class_setter,
def_clone
def_clone,
def_equals(*fields)
def_equals,
def_equals_and_hash(*fields)
def_equals_and_hash,
def_hash(*fields)
def_hash,
delegate(*methods, to object)
delegate,
forward_missing_to(delegate)
forward_missing_to,
getter(*names, &block)
getter,
getter!(*names)
getter!,
getter?(*names, &block)
getter?,
property(*names, &block)
property,
property!(*names)
property!,
property?(*names, &block)
property?,
setter(*names)
setter
Constructor Detail
Instance Method Detail
Returns any backtrace associated with the exception. The backtrace is an array of strings, each containing “0xAddress: Function at File Line Column”.
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”.
Returns the previous exception at the time this exception was raised. This is useful for wrapping exceptions and retaining the original exception information.
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>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>