abstract class Class

Defined in:

class.cr
primitives.cr

Constructors

Class Method Summary

Instance Method Summary

Instance methods inherited from struct Value

==(other : JSON::Any)
==(other : YAML::Any)
==(other) ==, dup dup

Instance methods inherited from class Object

!=(other) !=, !~(other) !~, ==(other) ==, ===(other : JSON::Any)
===(other : YAML::Any)
===(other) ===, =~(other) =~, class class, dup dup, hash(hasher)
hash hash, inspect(io : IO)
inspect inspect, itself itself, not_nil! not_nil!, pretty_inspect(width = 79, newline = "\n", indent = 0) : String pretty_inspect, pretty_print(pp : PrettyPrint) : Nil pretty_print, tap(&block) tap, to_json(io : IO)
to_json to_json, to_pretty_json(indent : String = " ")
to_pretty_json(io : IO, indent : String = " ") to_pretty_json, to_s
to_s(io : IO) to_s, to_yaml(io : IO)
to_yaml to_yaml, try(&block) try, unsafe_as(type : T.class) forall T unsafe_as

Constructor methods inherited from class Object

from_json(string_or_io, root : String) : self
from_json(string_or_io) : self from_json, from_yaml(string_or_io : String | IO) : self from_yaml

Constructor Detail

def self.cast(other) : self #

Casts other to this class.

This is the same as using as, but allows the class to be passed around as an argument. See the documentation on as for more information.

klass = Int32
number = [99, "str"][0]
typeof(number)             # => (String | Int32)
typeof(klass.cast(number)) # => Int32

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Class Method Detail

def self.<(other : T.class) : Bool forall T #

Returns whether this class inherits or includes other.

Int32 < Number  # => true
Int32 < Value   # => true
Int32 < Int32   # => false
Int32 <= String # => false

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def self.<=(other : T.class) : Bool forall T #

Returns whether this class inherits or includes other, or is equal to other.

Int32 < Number  # => true
Int32 < Value   # => true
Int32 <= Int32  # => true
Int32 <= String # => false

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def self.==(other : Class) : Bool #

Returns whether this class is the same as other.

Int32 == Int32  # => true
Int32 == String # => false

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def self.===(other) #

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def self.>(other : T.class) forall T #

Returns whether other inherits or includes self.

Number > Int32  # => true
Number > Number # => false
Number > Object # => false

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def self.>=(other : T.class) forall T #

Returns whether other inherits or includes self, or is equal to self.

Number >= Int32  # => true
Number >= Number # => true
Number >= Object # => false

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def self.clone #

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def self.dup #

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def self.hash(hasher) #

See Object#hash(hasher)


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def self.inspect(io) #

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def self.name : String #

Returns the name of this class.

String.name # => "String"

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def self.nilable? #

Returns true if this class is Nil.

Int32.nilable? # => false
Nil.nilable?   # => true

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def self.to_s(io) #

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def self.|(other : U.class) forall U #

Returns the union type of self and other.

Int32 | Char # => (Int32 | Char)

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Instance Method Detail

def <(other : T.class) : Bool forall T #

Returns whether this class inherits or includes other.

Int32 < Number  # => true
Int32 < Value   # => true
Int32 < Int32   # => false
Int32 <= String # => false

[View source]
def <=(other : T.class) : Bool forall T #

Returns whether this class inherits or includes other, or is equal to other.

Int32 < Number  # => true
Int32 < Value   # => true
Int32 <= Int32  # => true
Int32 <= String # => false

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def ==(other : Class) : Bool #

Returns whether this class is the same as other.

Int32 == Int32  # => true
Int32 == String # => false

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def ===(other) #

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def >(other : T.class) forall T #

Returns whether other inherits or includes self.

Number > Int32  # => true
Number > Number # => false
Number > Object # => false

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def >=(other : T.class) forall T #

Returns whether other inherits or includes self, or is equal to self.

Number >= Int32  # => true
Number >= Number # => true
Number >= Object # => false

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def cast(other) : self #

Casts other to this class.

This is the same as using as, but allows the class to be passed around as an argument. See the documentation on as for more information.

klass = Int32
number = [99, "str"][0]
typeof(number)             # => (String | Int32)
typeof(klass.cast(number)) # => Int32

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def clone #

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def dup #

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def hash(hasher) #

See Object#hash(hasher)


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def inspect(io) #

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def name : String #

Returns the name of this class.

String.name # => "String"

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def nilable? #

Returns true if this class is Nil.

Int32.nilable? # => false
Nil.nilable?   # => true

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def to_s(io) #

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def |(other : U.class) forall U #

Returns the union type of self and other.

Int32 | Char # => (Int32 | Char)

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