Class: SyntaxTree::UntilMod

Inherits:
Node
  • Object
show all
Defined in:
lib/syntax_tree/node.rb

Overview

UntilMod represents the modifier form of a until loop.

expression until predicate

Instance Attribute Summary collapse

Attributes inherited from Node

#location

Instance Method Summary collapse

Methods inherited from Node

#construct_keys, #pretty_print, #to_json

Constructor Details

#initialize(statement:, predicate:, location:, comments: []) ⇒ UntilMod

Returns a new instance of UntilMod.



9331
9332
9333
9334
9335
9336
 
# File 'lib/syntax_tree/node.rb', line 9331

def initialize(statement:, predicate:, location:, comments: [])
  @statement = statement
  @predicate = predicate
  @location = location
  @comments = comments
end

Instance Attribute Details

#comments ⇒ Object (readonly)

[Array[ Comment | EmbDoc ]] the comments attached to this node



9329
9330
9331
 
# File 'lib/syntax_tree/node.rb', line 9329

def comments
  @comments
end

#predicate ⇒ Object (readonly)

[untyped] the expression to be checked



9326
9327
9328
 
# File 'lib/syntax_tree/node.rb', line 9326

def predicate
  @predicate
end

#statement ⇒ Object (readonly)

[untyped] the expression to be executed



9323
9324
9325
 
# File 'lib/syntax_tree/node.rb', line 9323

def statement
  @statement
end

Instance Method Details

#accept(visitor) ⇒ Object 



9338
9339
9340
 
# File 'lib/syntax_tree/node.rb', line 9338

def accept(visitor)
  visitor.visit_until_mod(self)
end

#child_nodes ⇒ Object Also known as: deconstruct 



9342
9343
9344
 
# File 'lib/syntax_tree/node.rb', line 9342

def child_nodes
  [statement, predicate]
end

#deconstruct_keys(_keys) ⇒ Object 



9348
9349
9350
9351
9352
9353
9354
9355
 
# File 'lib/syntax_tree/node.rb', line 9348

def deconstruct_keys(_keys)
  {
    statement: statement,
    predicate: predicate,
    location: location,
    comments: comments
  }
end

#format(q) ⇒ Object 



9357
9358
9359
9360
9361
9362
9363
9364
9365
9366
9367
9368
9369
9370
9371
9372
9373
9374
9375
9376
9377
9378
9379
 
# File 'lib/syntax_tree/node.rb', line 9357

def format(q)
  # If we're in the modifier form and we're modifying a `begin`, then this
  # is a special case where we need to explicitly use the modifier form
  # because otherwise the semantic meaning changes. This looks like:
  #
  #     begin
  #       foo
  #     end until bar
  #
  # Also, if the statement of the modifier includes an assignment, then we
  # can't know for certain that it won't impact the predicate, so we need to
  # force it to stay as it is. This looks like:
  #
  #     foo = bar until foo
  #
  if statement.is_a?(Begin) || ContainsAssignment.call(statement)
    q.format(statement)
    q.text(" until ")
    q.format(predicate)
  else
    LoopFormatter.new("until", self, statement).format(q)
  end
end