Class: YARD::CodeObjects::Proxy

Inherits:
Object
  • Object
show all
Defined in:
lib/yard/code_objects/proxy.rb

Overview

The Proxy class is a way to lazily resolve code objects in cases where the object may not yet exist. A proxy simply stores an unresolved path until a method is called on the object, at which point it does a lookup using Registry.resolve. If the object is not found, a warning is raised and ProxyMethodError might be raised.

Examples:

Creates a Proxy to the String class from a module

# When the String class is parsed this method will
# begin to act like the String ClassObject.
Proxy.new(mymoduleobj, "String")

See Also:

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(namespace, name) ⇒ Proxy

Creates a new Proxy

Raises:

  • (ArgumentError) —

    if namespace is not a NamespaceObject



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
 
# File 'lib/yard/code_objects/proxy.rb', line 28

def initialize(namespace, name)
  namespace = Registry.root if !namespace || namespace == :root
  
  if name =~ /^#{NSEPQ}/
    namespace = Registry.root
    name = name[2..-1]
  end
  
  if name =~ /(?:#{NSEPQ}|#{ISEPQ}|#{CSEPQ})([^#{NSEPQ}#{ISEPQ}#{CSEPQ}]+)$/
    @orignamespace, @origname = namespace, name
    @imethod = true if name.include? ISEP
    namespace = Proxy.new(namespace, $`) unless $`.empty?
    name = $1
  else
    @orignamespace, @origname, @imethod = nil, nil, nil
  end 
  
  @name = name.to_sym
  @namespace = namespace
  @obj = nil
  @imethod ||= nil
  
  unless @namespace.is_a?(NamespaceObject) or @namespace.is_a?(Proxy)
    raise ArgumentError, "Invalid namespace object: #{namespace}"
  end
  
  # If the name begins with "::" (like "::String")
  # this is definitely a root level object, so
  # remove the namespace and attach it to the root
  if @name =~ /^#{NSEPQ}/
    @name.gsub!(/^#{NSEPQ}/, '')
    @namespace = Registry.root
  end
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

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

Dispatches the method to the resolved object.

Raises:



196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
 
# File 'lib/yard/code_objects/proxy.rb', line 196

def method_missing(meth, *args, &block)
  if obj = to_obj
    obj.__send__(meth, *args, &block)
  else
    log.warn "Load Order / Name Resolution Problem on #{path}:"
    log.warn "-"
    log.warn "Something is trying to call #{meth} on object #{path} before it has been recognized."
    log.warn "This error usually means that you need to modify the order in which you parse files"
    log.warn "so that #{path} is parsed before methods or other objects attempt to access it."
    log.warn "-"
    log.warn "YARD will recover from this error and continue to parse but you *may* have problems"
    log.warn "with your generated documentation. You should probably fix this."
    log.warn "-"
    begin 
      super
    rescue NoMethodError
      raise ProxyMethodError, "Proxy cannot call method ##{meth} on object '#{path}'"
    end
  end
end

Instance Attribute Details

#namespace ⇒ Object (readonly) Also known as: parent

Returns the value of attribute namespace.



21
22
23
 
# File 'lib/yard/code_objects/proxy.rb', line 21

def namespace
  @namespace
end

Class Method Details

.===(other) ⇒ Object 



19
 
# File 'lib/yard/code_objects/proxy.rb', line 19

def self.===(other) other.is_a?(self) end

Instance Method Details

#<=>(other) ⇒ Boolean

Returns:

  • (Boolean) 


124
125
126
127
128
129
130
 
# File 'lib/yard/code_objects/proxy.rb', line 124

def <=>(other)
  if other.respond_to? :path
    path <=> other.path
  else
    false
  end
end

#===(other) ⇒ Boolean

Returns:

  • (Boolean) 


115
116
117
118
119
120
121
 
# File 'lib/yard/code_objects/proxy.rb', line 115

def ===(other)
  if obj = to_obj
    obj === other
  else
    self.class <= other.class
  end
end

#class ⇒ Class

Returns the class name of the object the proxy is mimicking, if resolved. Otherwise returns Proxy.

Returns:

  • (Class) —

    the resolved object’s class or Proxy



148
149
150
151
152
153
154
 
# File 'lib/yard/code_objects/proxy.rb', line 148

def class
  if obj = to_obj
    obj.class
  else
    Proxy
  end
end

#equal?(other) ⇒ Boolean Also known as: ==

Returns:

  • (Boolean) 


133
134
135
136
137
138
139
 
# File 'lib/yard/code_objects/proxy.rb', line 133

def equal?(other)
  if other.respond_to? :path
    path == other.path
  else
    false
  end
end

#hash ⇒ Integer

Returns the object’s hash value (for equality checking).

Returns:

  • (Integer) —

    the object’s hash value (for equality checking)



143
 
# File 'lib/yard/code_objects/proxy.rb', line 143

def hash; path.hash end

#inspect ⇒ String

Returns a text representation of the Proxy

Returns:

  • (String) —

    the object’s #inspect method or P(OBJECTPATH)



70
71
72
73
74
75
76
 
# File 'lib/yard/code_objects/proxy.rb', line 70

def inspect
  if obj = to_obj
    obj.inspect
  else
    "P(#{path})"
  end
end

#instance_of?(klass) ⇒ Boolean

Returns:

  • (Boolean) 


175
176
177
 
# File 'lib/yard/code_objects/proxy.rb', line 175

def instance_of?(klass)
  self.class == klass
end

#is_a?(klass) ⇒ Boolean

Returns:

  • (Boolean) 


106
107
108
109
110
111
112
 
# File 'lib/yard/code_objects/proxy.rb', line 106

def is_a?(klass)
  if obj = to_obj
    obj.is_a?(klass)
  else
    self.class <= klass
  end
end

#kind_of?(klass) ⇒ Boolean

Returns:

  • (Boolean) 


180
181
182
 
# File 'lib/yard/code_objects/proxy.rb', line 180

def kind_of?(klass)
  self.class <= klass
end

#name(prefix = false) ⇒ Symbol, String

The name of the object

Parameters:

  • prefix (Boolean) (defaults to: false) —

    whether to show a prefix. Implement this in a subclass to define how the prefix is showed.

Returns:

  • (Symbol) —

    if prefix is false, the symbolized name

  • (String) —

    if prefix is true, prefix + the name as a String. This must be implemented by the subclass.



64
65
66
 
# File 'lib/yard/code_objects/proxy.rb', line 64

def name(prefix = false)
  prefix ? (@imethod ? ISEP : '') + @name.to_s : @name
end

#path ⇒ String Also known as: to_s, to_str

If the proxy resolves to an object, returns its path, otherwise guesses at the correct path using the original namespace and name.

Returns:

  • (String) —

    the assumed path of the proxy (or the real path of the resolved object)



83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
 
# File 'lib/yard/code_objects/proxy.rb', line 83

def path
  if obj = to_obj
    obj.path
  else
    if @namespace.root?
      (@imethod ? ISEP : "") + name.to_s
    elsif @origname
      if @origname =~ /^[A-Z]/
        @origname
      else
        [namespace.path, @origname].join
      end
    elsif name.to_s =~ /^[A-Z]/ # const
      name.to_s
    else # class meth?
      [namespace.path, name.to_s].join(CSEP)
    end
  end
end

#respond_to?(meth, include_private = false) ⇒ Boolean

Returns:

  • (Boolean) 


185
186
187
188
189
190
191
 
# File 'lib/yard/code_objects/proxy.rb', line 185

def respond_to?(meth, include_private = false)
  if obj = to_obj
    obj.respond_to?(meth, include_private)
  else
    super
  end
end

#root? ⇒ Boolean

This class is never a root object

Returns:

  • (Boolean) 


218
 
# File 'lib/yard/code_objects/proxy.rb', line 218

def root?; false end

#type ⇒ Symbol

Returns the type of the proxy. If it cannot be resolved at the time of the call, it will either return the inferred proxy type (see #type=) or :proxy

Returns:

  • (Symbol) —

    the Proxy’s type

See Also:



161
162
163
164
165
166
167
 
# File 'lib/yard/code_objects/proxy.rb', line 161

def type
  if obj = to_obj
    obj.type
  else
    Registry.proxy_types[path] || :proxy
  end
end

#type=(type) ⇒ void

This method returns an undefined value.

Allows a parser to infer the type of the proxy by its path.

Parameters:

  • type (#to_sym) —

    the proxy’s inferred type



172
 
# File 'lib/yard/code_objects/proxy.rb', line 172

def type=(type) Registry.proxy_types[path] = type.to_sym end