Class: Parser::AST::Node

Inherits:
Object
  • Object
show all
Defined in:
lib/synvert/core/node_ext.rb

Overview

Parser::AST::Node monkey patch.

Instance Method Summary collapse

Instance Method Details

#arguments ⇒ Array<Parser::AST::Node>

Get arguments node of :send, :block or :defined? node.

Returns:

Raises:



94
95
96
97
98
99
100
101
102
103
104
105
106
107
 
# File 'lib/synvert/core/node_ext.rb', line 94

def arguments
  case self.type
  when :def, :block
    ArgumentsNode.new self.children[1]
  when :defs
    ArgumentsNode.new self.children[2]
  when :send
    self.children[2..-1]
  when :defined?
    self.children
  else
    raise Synvert::Core::MethodNotSupported.new "arguments is not handled for #{self.debug_info}"
  end
end

#body ⇒ Array<Parser::AST::Node>

Get body node of :begin or :block node.

Returns:

Raises:



125
126
127
128
129
130
131
132
133
134
135
136
137
138
 
# File 'lib/synvert/core/node_ext.rb', line 125

def body
  case self.type
  when :begin
    self.children
  when :def, :block
    return [] if self.children[2].nil?
    :begin == self.children[2].type ? self.children[2].body : self.children[2..-1]
  when :defs
    return [] if self.children[3].nil?
    :begin == self.children[3].type ? self.children[3].body : self.children[3..-1]
  else
    raise Synvert::Core::MethodNotSupported.new "body is not handled for #{self.debug_info}"
  end
end

#caller ⇒ Parser::AST::Node

Get caller node of :block node.

Returns:

Raises:



113
114
115
116
117
118
119
 
# File 'lib/synvert/core/node_ext.rb', line 113

def caller
  if :block == self.type
    self.children[0]
  else
    raise Synvert::Core::MethodNotSupported.new "caller is not handled for #{self.debug_info}"
  end
end

#condition ⇒ Parser::AST::Node

Get condition node of :if node.

Returns:

Raises:



144
145
146
147
148
149
150
 
# File 'lib/synvert/core/node_ext.rb', line 144

def condition
  if :if == self.type
    self.children[0]
  else
    raise Synvert::Core::MethodNotSupported.new "condition is not handled for #{self.debug_info}"
  end
end

#debug_info ⇒ Object 



274
275
276
277
278
279
280
281
 
# File 'lib/synvert/core/node_ext.rb', line 274

def debug_info
  "\n" + [
    "file: #{self.loc.expression.source_buffer.name}",
    "line: #{self.loc.expression.line}",
    "source: #{self.to_source}",
    "node: #{self.inspect}"
  ].join("\n")
end

#has_key?(key) ⇒ Boolean

Test if hash node contains specified key.

Parameters:

  • key (Object) —

    value.

Returns:

  • (Boolean) —

    true if specified key exists.

Raises:



181
182
183
184
185
186
187
 
# File 'lib/synvert/core/node_ext.rb', line 181

def has_key?(key)
  if :hash == self.type
    self.children.any? { |pair_node| pair_node.key.to_value == key }
  else
    raise Synvert::Core::MethodNotSupported.new "has_key? is not handled for #{self.debug_info}"
  end
end

#hash_value(key) ⇒ Parser::AST::Node

Get hash value node according to specified key.

Parameters:

  • key (Object) —

    value.

Returns:

Raises:



194
195
196
197
198
199
200
201
 
# File 'lib/synvert/core/node_ext.rb', line 194

def hash_value(key)
  if :hash == self.type
    value_node = self.children.find { |pair_node| pair_node.key.to_value == key }
    value_node ? value_node.value : nil
  else
    raise Synvert::Core::MethodNotSupported.new "has_key? is not handled for #{self.debug_info}"
  end
end

#indent ⇒ Integer

Get the indent of current node.

Returns:

  • (Integer) —

    indent.



295
296
297
 
# File 'lib/synvert/core/node_ext.rb', line 295

def indent
  self.loc.expression.column
end

#key ⇒ Parser::AST::Node

Get key node of hash :pair node.

Returns:

Raises:



207
208
209
210
211
212
213
 
# File 'lib/synvert/core/node_ext.rb', line 207

def key
  if :pair == self.type
    self.children.first
  else
    raise Synvert::Core::MethodNotSupported.new "key is not handled for #{self.debug_info}"
  end
end

#keys ⇒ Array<Parser::AST::Node>

Get keys node of :hash node.

Returns:

Raises:



156
157
158
159
160
161
162
 
# File 'lib/synvert/core/node_ext.rb', line 156

def keys
  if :hash == self.type
    self.children.map { |child| child.children[0] }
  else
    raise Synvert::Core::MethodNotSupported.new "keys is not handled for #{self.debug_info}"
  end
end

#left_value ⇒ Parser::AST::Node

Return the left value.

Returns:

Raises:



231
232
233
234
235
236
237
 
# File 'lib/synvert/core/node_ext.rb', line 231

def left_value
  if [:masgn, :lvasgn, :ivasgn].include? self.type
    self.children[0]
  else
    raise Synvert::Core::MethodNotSupported.new "left_value is not handled for #{self.debug_info}"
  end
end

#line ⇒ Integer

Get the line of current node.

Returns:

  • (Integer) —

    line.



302
303
304
 
# File 'lib/synvert/core/node_ext.rb', line 302

def line
  self.loc.expression.line
end

#match?(rules) ⇒ Boolean

Match current node with rules.

Parameters:

  • rules (Hash) —

    rules to match.

Returns:

  • (Boolean) —

    true if matches.



323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
 
# File 'lib/synvert/core/node_ext.rb', line 323

def match?(rules)
  flat_hash(rules).keys.all? do |multi_keys|
    if multi_keys.last == :any
      actual_values = actual_value(self, multi_keys[0...-1])
      expected = expected_value(rules, multi_keys)
      actual_values.any? { |actual| match_value?(actual, expected) }
    elsif multi_keys.last == :not
      actual = actual_value(self, multi_keys[0...-1])
      expected = expected_value(rules, multi_keys)
      !match_value?(actual, expected)
    else
      actual = actual_value(self, multi_keys)
      expected = expected_value(rules, multi_keys)
      match_value?(actual, expected)
    end
  end
end

#message ⇒ Parser::AST::Node

Get message node of :send node.

Returns:

Raises:



82
83
84
85
86
87
88
 
# File 'lib/synvert/core/node_ext.rb', line 82

def message
  if :send == self.type
    self.children[1]
  else
    raise Synvert::Core::MethodNotSupported.new "message is not handled for #{self.debug_info}"
  end
end

#name ⇒ Parser::AST::Node

Get name node of :class, :module, :const, :def and :defs node.

Returns:

Raises:



31
32
33
34
35
36
37
38
39
40
 
# File 'lib/synvert/core/node_ext.rb', line 31

def name
  case self.type
  when :class, :module, :def, :arg, :blockarg
    self.children[0]
  when :defs, :const
    self.children[1]
  else
    raise Synvert::Core::MethodNotSupported.new "name is not handled for #{self.debug_info}"
  end
end

#parent_class ⇒ Parser::AST::Node

Get parent_class node of :class node.

Returns:

Raises:



46
47
48
49
50
51
52
 
# File 'lib/synvert/core/node_ext.rb', line 46

def parent_class
  if :class == self.type
    self.children[1]
  else
    raise Synvert::Core::MethodNotSupported.new "parent_class is not handled for #{self.debug_info}"
  end
end

#parent_const ⇒ Parser::AST::Node

Get parent constant node of :const node.

Returns:

Raises:



58
59
60
61
62
63
64
 
# File 'lib/synvert/core/node_ext.rb', line 58

def parent_const
  if :const == self.type
    self.children[0]
  else
    raise Synvert::Core::MethodNotSupported.new "parent_const is not handled for #{self.debug_info}"
  end
end

#receiver ⇒ Parser::AST::Node

Get receiver node of :send node.

Returns:

Raises:



70
71
72
73
74
75
76
 
# File 'lib/synvert/core/node_ext.rb', line 70

def receiver
  if :send == self.type
    self.children[0]
  else
    raise Synvert::Core::MethodNotSupported.new "receiver is not handled for #{self.debug_info}"
  end
end

#recursive_children {|child| ... } ⇒ Object

Recursively iterate all child nodes of current node.

Yields:

  • (child) —

    Gives a child node.

Yield Parameters:



310
311
312
313
314
315
316
317
 
# File 'lib/synvert/core/node_ext.rb', line 310

def recursive_children
  self.children.each do |child|
    if Parser::AST::Node === child
      yield child
      child.recursive_children { |c| yield c }
    end
  end
end

#rewritten_source(code) ⇒ String

Get rewritten source code.

Examples:

node.rewritten_source("create({{arguments}})") #=> "create(:post)"

Parameters:

  • code (String) —

    raw code.

Returns:

  • (String) —

    rewritten code, replace string in block } in raw code.

Raises:



348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
 
# File 'lib/synvert/core/node_ext.rb', line 348

def rewritten_source(code)
  code.gsub(/{{(.*?)}}/m) do
    old_code = $1
    if self.respond_to? old_code.split(/\.|\[/).first
      evaluated = self.instance_eval old_code
      case evaluated
      when Parser::AST::Node
        evaluated.loc.expression.source
      when Array, ArgumentsNode
        if evaluated.size > 0
          file_source = evaluated.first.loc.expression.source_buffer.source
          source = file_source[evaluated.first.loc.expression.begin_pos...evaluated.last.loc.expression.end_pos]
          lines = source.split "\n"
          lines_count = lines.length
          if lines_count > 1 && lines_count == evaluated.size
            new_code = []
            lines.each_with_index { |line, index|
              new_code << (index == 0 ? line : line[evaluated.first.indent-2..-1])
            }
            new_code.join("\n")
          else
            source
          end
        end
      when String, Symbol
        evaluated
      when NilClass
        'nil'
      else
        raise Synvert::Core::MethodNotSupported.new "rewritten_source is not handled for #{evaluated.inspect}"
      end
    else
      "{{#{old_code}}}"
    end
  end
end

#right_value ⇒ Array<Parser::AST::Node>

Return the right value.

Returns:

Raises:



243
244
245
246
247
248
249
 
# File 'lib/synvert/core/node_ext.rb', line 243

def right_value
  if [:masgn, :lvasgn, :ivasgn].include? self.type
    self.children[1]
  else
    raise Synvert::Core::MethodNotSupported.new "right_value is not handled for #{self.debug_info}"
  end
end

#to_source ⇒ String

Get the source code of current node.

Returns:

  • (String) —

    source code.



286
287
288
289
290
 
# File 'lib/synvert/core/node_ext.rb', line 286

def to_source
  if self.loc.expression
    self.loc.expression.source
  end
end

#to_value ⇒ Object

Return the exact value.

Returns:

  • (Object) —

    exact value.

Raises:



255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
 
# File 'lib/synvert/core/node_ext.rb', line 255

def to_value
  case self.type
  when :int, :str, :sym
    self.children.last
  when :true
    true
  when :false
    false
  when :array
    self.children.map(&:to_value)
  when :irange
    (self.children.first.to_value..self.children.last.to_value)
  when :begin
    self.children.first.to_value
  else
    raise Synvert::Core::MethodNotSupported.new "to_value is not handled for #{self.debug_info}"
  end
end

#value ⇒ Parser::AST::Node

Get value node of hash :pair node.

Returns:

Raises:



219
220
221
222
223
224
225
 
# File 'lib/synvert/core/node_ext.rb', line 219

def value
  if :pair == self.type
    self.children.last
  else
    raise Synvert::Core::MethodNotSupported.new "value is not handled for #{self.debug_info}"
  end
end

#values ⇒ Array<Parser::AST::Node>

Get values node of :hash node.

Returns:

Raises:



168
169
170
171
172
173
174
 
# File 'lib/synvert/core/node_ext.rb', line 168

def values
  if :hash == self.type
    self.children.map { |child| child.children[1] }
  else
    raise Synvert::Core::MethodNotSupported.new "keys is not handled for #{self.debug_info}"
  end
end