1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
|
module Kernel
#
# call-seq:
# obj.class -> class
#
# Returns the class of <i>obj</i>. This method must always be called
# with an explicit receiver, as #class is also a reserved word in
# Ruby.
#
# 1.class #=> Integer
# self.class #=> Object
#--
# Equivalent to \c Object\#class in Ruby.
#
# Returns the class of \c obj, skipping singleton classes or module inclusions.
#++
#
def class
Primitive.attr! 'inline'
Primitive.cexpr! 'rb_obj_class(self)'
end
#
# call-seq:
# obj.clone(freeze: nil) -> an_object
#
# Produces a shallow copy of <i>obj</i>---the instance variables of
# <i>obj</i> are copied, but not the objects they reference.
# #clone copies the frozen value state of <i>obj</i>, unless the
# +:freeze+ keyword argument is given with a false or true value.
# See also the discussion under Object#dup.
#
# class Klass
# attr_accessor :str
# end
# s1 = Klass.new #=> #<Klass:0x401b3a38>
# s1.str = "Hello" #=> "Hello"
# s2 = s1.clone #=> #<Klass:0x401b3998 @str="Hello">
# s2.str[1,4] = "i" #=> "i"
# s1.inspect #=> "#<Klass:0x401b3a38 @str=\"Hi\">"
# s2.inspect #=> "#<Klass:0x401b3998 @str=\"Hi\">"
#
# This method may have class-specific behavior. If so, that
# behavior will be documented under the #+initialize_copy+ method of
# the class.
#
def clone(freeze: nil)
Primitive.rb_obj_clone2(freeze)
end
#
# call-seq:
# obj.frozen? -> true or false
#
# Returns the freeze status of <i>obj</i>.
#
# a = [ "a", "b", "c" ]
# a.freeze #=> ["a", "b", "c"]
# a.frozen? #=> true
#--
# Determines if the object is frozen. Equivalent to \c Object\#frozen? in Ruby.
# \param[in] obj the object to be determines
# \retval Qtrue if frozen
# \retval Qfalse if not frozen
#++
#
def frozen?
Primitive.attr! 'inline'
Primitive.cexpr! 'rb_obj_frozen_p(self)'
end
#
# call-seq:
# obj.tap {|x| block } -> obj
#
# Yields self to the block, and then returns self.
# The primary purpose of this method is to "tap into" a method chain,
# in order to perform operations on intermediate results within the chain.
#
# (1..10) .tap {|x| puts "original: #{x}" }
# .to_a .tap {|x| puts "array: #{x}" }
# .select {|x| x.even? } .tap {|x| puts "evens: #{x}" }
# .map {|x| x*x } .tap {|x| puts "squares: #{x}" }
#
#--
# \private
#++
#
def tap
yield(self)
self
end
#
# call-seq:
# obj.then {|x| block } -> an_object
#
# Yields self to the block and returns the result of the block.
#
# 3.next.then {|x| x**x }.to_s #=> "256"
#
# Good usage for +then+ is value piping in method chains:
#
# require 'open-uri'
# require 'json'
#
# construct_url(arguments).
# then {|url| URI(url).read }.
# then {|response| JSON.parse(response) }
#
# When called without block, the method returns +Enumerator+,
# which can be used, for example, for conditional
# circuit-breaking:
#
# # meets condition, no-op
# 1.then.detect(&:odd?) # => 1
# # does not meet condition, drop value
# 2.then.detect(&:odd?) # => nil
#
def then
unless Primitive.block_given_p
return Primitive.cexpr! 'SIZED_ENUMERATOR(self, 0, 0, rb_obj_size)'
end
yield(self)
end
#
# call-seq:
# obj.yield_self {|x| block } -> an_object
#
# Yields self to the block and returns the result of the block.
#
# "my string".yield_self {|s| s.upcase } #=> "MY STRING"
#
# Good usage for +then+ is value piping in method chains:
#
# require 'open-uri'
# require 'json'
#
# construct_url(arguments).
# then {|url| URI(url).read }.
# then {|response| JSON.parse(response) }
#
def yield_self
unless Primitive.block_given_p
return Primitive.cexpr! 'SIZED_ENUMERATOR(self, 0, 0, rb_obj_size)'
end
yield(self)
end
module_function
#
# call-seq:
# Float(arg, exception: true) -> float or nil
#
# Returns <i>arg</i> converted to a float. Numeric types are
# converted directly, and with exception to String and
# <code>nil</code> the rest are converted using
# <i>arg</i><code>.to_f</code>. Converting a String with invalid
# characters will result in a ArgumentError. Converting
# <code>nil</code> generates a TypeError. Exceptions can be
# suppressed by passing <code>exception: false</code>.
#
# Float(1) #=> 1.0
# Float("123.456") #=> 123.456
# Float("123.0_badstring") #=> ArgumentError: invalid value for Float(): "123.0_badstring"
# Float(nil) #=> TypeError: can't convert nil into Float
# Float("123.0_badstring", exception: false) #=> nil
#
def Float(arg, exception: true)
Primitive.rb_f_float(arg, exception)
end
end
|
