struct Bool

Overview

Bool has only two possible values: true and false. They are constructed using these literals:

true  # A Bool that is true
false # A Bool that is false

Defined in:

bool.cr
json/to_json.cr
yaml/to_yaml.cr

Class Method Summary

Instance Method Summary

Instance methods inherited from struct Value

! !, ==(other) ==, nil? nil?

Instance methods inherited from class Object

! !, !=(other) !=, !~(other) !~, ==(other) ==, ===(other) ===, =~(other) =~, class class, clone clone, crystal_type_id crystal_type_id, dup dup, hash hash, inspect
inspect(io : IO)
inspect
, itself itself, not_nil! not_nil!, tap(&block) tap, to_json to_json, to_pretty_json(io : IO)
to_pretty_json
to_pretty_json
, to_s
to_s(io : IO)
to_s
, to_yaml(io : IO)
to_yaml
to_yaml
, try(&block) try

Class methods inherited from class Object

==(other : Class) ==, ===(other) ===, cast(other) : self cast, from_json(string_or_io) from_json, from_yaml(string : String) from_yaml, hash hash, inspect(io) inspect, name : String name, to_s(io) to_s

Class Method Detail

def self.new(pull : YAML::PullParser) #

[View source]
def self.new(pull : JSON::PullParser) #

[View source]

Instance Method Detail

def ! #

Negates this boolean.

!true  # => false
!false # => true

[View source]
def !=(other : Bool) #

Returns true if this Bool is not equal to other.


def &(other : Bool) #

Bitwise AND. Returns true if this bool and other are true, otherwise returns false.

false & false # => false
false & true  # => false
true & false  # => false
true & true   # => true

[View source]
def ==(other : Bool) #

Returns true if this Bool is equal to other.


def ^(other : Bool) #

Exclusive Or. Returns true if this bool is different from other, otherwise returns false.

false ^ false # => false
false ^ true  # => true
true ^ false  # => true
true ^ true   # => false

[View source]
def hash #

Returns a hash value for this boolean: 0 for false, 1 for true.


[View source]
def to_json(io) #

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def to_s #

Returns "true" for true and "false" for false.


[View source]
def to_s(io) #

Appends "true" for true and "false" for false to the given IO.


[View source]
def to_yaml(yaml : YAML::Generator) #

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def |(other : Bool) #

Bitwise OR. Returns true if this bool or other is true, otherwise returns false.

false | false # => false
false | true  # => true
true | false  # => true
true | true   # => true

[View source]