[フレーム]

Class: Boolean

Inherits:
Object show all
Defined in:
opal/opal/corelib/boolean.rb,
opal/opal/corelib/marshal/write_buffer.rb

Overview

use_strict: true

Direct Known Subclasses

FalseClass , TrueClass

Class Method Summary collapse

Instance Method Summary collapse

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method, *args, &block) ⇒ Object

See: https://github.com/opal/opal/issues/2230

This is a hack that allows you to add methods to TrueClass and FalseClass. Do note, that while true and false have a correct $$class (it's either TrueClass or FalseClass), their prototype is Boolean.$$prototype, which basically means that when calling true.something we actually call Boolean#something instead of TrueClass#something. So using method_missing we dispatch it to TrueClass/FalseClass#something correctly.

The downside is that a correct implementation would also allow us to override the methods defined on Boolean, but our implementation doesn't allow that, unless you define them on Boolean and not on TrueClass/FalseClass.

92
93
94
95
96
# File 'opal/opal/corelib/boolean.rb', line 92
def method_missing(method, *args, &block)
 `var body = self.$$class.$$prototype[Opal.jsid(#{method})]`
 super unless `typeof body !== 'undefined' && !body.$$stub`
 `Opal.send(self, body, #{args}, #{block})`
end

Class Method Details

.allocate ⇒ Object 

33
34
35
# File 'opal/opal/corelib/boolean.rb', line 33
def allocate
 ::Kernel .raise  ::TypeError , "allocator undefined for #{name}"
end

Instance Method Details

#! ⇒ Object 

44
45
46
# File 'opal/opal/corelib/boolean.rb', line 44
def !
 `self != true`
end

#&(other) ⇒ Object 

48
49
50
# File 'opal/opal/corelib/boolean.rb', line 48
def &(other)
 `(self == true) ? (other !== false && other !== nil) : false`
end

#==(other) ⇒ Object Also known as: eql?, equal? 

60
61
62
# File 'opal/opal/corelib/boolean.rb', line 60
def ==(other)
 `(self == true) === other.valueOf()`
end

#^(other) ⇒ Object 

56
57
58
# File 'opal/opal/corelib/boolean.rb', line 56
def ^(other)
 `(self == true) ? (other === false || other === nil) : (other !== false && other !== nil)`
end

#__id__ ⇒ Object Also known as: object_id 

40
41
42
# File 'opal/opal/corelib/boolean.rb', line 40
def __id__
 `self.valueOf() ? 2 : 0`
end

#__marshal__(buffer) ⇒ Object 

8
9
10
11
12
13
14
# File 'opal/opal/corelib/marshal/write_buffer.rb', line 8
def __marshal__(buffer)
 if `self == true`
 buffer.append('T')
 else
 buffer.append('F')
 end
end

#clone(freeze: true) ⇒ Object 

76
77
78
# File 'opal/opal/corelib/boolean.rb', line 76
def clone(freeze: true)
 self
end

#dup ⇒ Object 

72
73
74
# File 'opal/opal/corelib/boolean.rb', line 72
def dup
 self
end

#respond_to_missing?(method, _include_all = false) ⇒ Boolean

Returns:

98
99
100
101
# File 'opal/opal/corelib/boolean.rb', line 98
def respond_to_missing?(method, _include_all = false)
 `var body = self.$$class.$$prototype[Opal.jsid(#{method})]`
 `typeof body !== 'undefined' && !body.$$stub`
end

#singleton_class ⇒ Object 

64
65
66
# File 'opal/opal/corelib/boolean.rb', line 64
def singleton_class
 `self.$$meta`
end

#to_s ⇒ Object Also known as: inspect 

68
69
70
# File 'opal/opal/corelib/boolean.rb', line 68
def to_s 
 `(self == true) ? 'true' : 'false'`
end

#|(other) ⇒ Object 

52
53
54
# File 'opal/opal/corelib/boolean.rb', line 52
def |(other)
 `(self == true) ? true : (other !== false && other !== nil)`
end

AltStyle によって変換されたページ (->オリジナル) /