Class: RuboCop::AST::BlockNode

Inherits:
Node
  • Object
show all
Defined in:
lib/rubocop/ast/node/block_node.rb

Overview

A node extension for ‘block` nodes. This will be used in place of a plain node when the builder constructs the AST, making its methods available to all `send` nodes within RuboCop.

A ‘block` node is essentially a method send with a block. Parser nests the `send` node inside the `block` node.

Constant Summary collapse

VOID_CONTEXT_METHODS = 
%i[each].freeze

Constants inherited from Node

Node::BASIC_LITERALS, Node::COMPARISON_OPERATORS, Node::COMPOSITE_LITERALS, Node::FALSEY_LITERALS, Node::IMMUTABLE_LITERALS, Node::KEYWORDS, Node::LITERALS, Node::MUTABLE_LITERALS, Node::OPERATOR_KEYWORDS, Node::REFERENCES, Node::SPECIAL_KEYWORDS, Node::TRUTHY_LITERALS, Node::VARIABLES

Instance Method Summary collapse

Methods inherited from Node

#ancestors, #argument?, #asgn_method_call?, #basic_literal?, #binary_operation?, #chained?, #child_nodes, #complete!, #complete?, #const_name, #defined_module, #defined_module_name, #descendants, #each_ancestor, #each_child_node, #each_descendant, #each_node, #falsey_literal?, #immutable_literal?, #initialize, #keyword?, #keyword_bang?, #keyword_not?, #literal?, #mutable_literal?, #numeric_type?, #operator_keyword?, #parent, #parent_module_name, #pure?, #receiver, #reference?, #sibling_index, #source, #source_range, #special_keyword?, #truthy_literal?, #unary_operation?, #updated, #value_used?, #variable?

Methods included from NodePattern::Macros

#def_node_matcher, #def_node_search, #node_search, #node_search_all, #node_search_body, #node_search_first

Methods included from Sexp

#s

Constructor Details

This class inherits a constructor from RuboCop::AST::Node

Instance Method Details

#arguments ⇒ Array<Node>

The arguments of this block.

Returns:



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# File 'lib/rubocop/ast/node/block_node.rb', line 24

def arguments
  node_parts[1]
end

#arguments? ⇒ Boolean

Checks whether this block takes any arguments.

Returns:

  • (Boolean) —

    whether this ‘block` node takes any arguments



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# File 'lib/rubocop/ast/node/block_node.rb', line 38

def arguments?
  !arguments.empty?
end

#body ⇒ Node?

The body of this block.

Returns:

  • (Node, nil) —

    the body of the ‘block` node or `nil`



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# File 'lib/rubocop/ast/node/block_node.rb', line 31

def body
  node_parts[2]
end

#braces? ⇒ Boolean

Checks whether the ‘block` literal is delimited by curly braces.

Returns:

  • (Boolean) —

    whether the ‘block` literal is enclosed in braces



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# File 'lib/rubocop/ast/node/block_node.rb', line 45

def braces?
  loc.end && loc.end.is?('}')
end

#closing_delimiter ⇒ String

The closing delimiter for this ‘block` literal.

Returns:

  • (String) —

    the closing delimiter for the ‘block` literal



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# File 'lib/rubocop/ast/node/block_node.rb', line 73

def closing_delimiter
  delimiters.last
end

#delimiters ⇒ Array<String>

The delimiters for this ‘block` literal.

Returns:

  • (Array<String>) —

    the delimiters for the ‘block` literal



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# File 'lib/rubocop/ast/node/block_node.rb', line 59

def delimiters
  [loc.begin.source, loc.end.source].freeze
end

#keywords? ⇒ Boolean

Checks whether the ‘block` literal is delimited by `do`-`end` keywords.

Returns:

  • (Boolean) —

    whether the ‘block` literal is enclosed in `do`-`end`



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# File 'lib/rubocop/ast/node/block_node.rb', line 52

def keywords?
  loc.end && loc.end.is?('end')
end

#lambda? ⇒ Boolean

Checks whether this ‘block` literal belongs to a lambda.

Returns:

  • (Boolean) —

    whether the ‘block` literal belongs to a lambda



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# File 'lib/rubocop/ast/node/block_node.rb', line 96

def lambda?
  send_node.method?(:lambda)
end

#multiline? ⇒ Boolean

Checks whether this is a multiline block. This is overridden here because the general version in ‘Node` does not work for `block` nodes.

Returns:

  • (Boolean) —

    whether the ‘block` literal is on a several lines



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# File 'lib/rubocop/ast/node/block_node.rb', line 89

def multiline?
  !single_line?
end

#node_parts ⇒ Array

Custom destructuring method. This can be used to normalize destructuring for different variations of the node.

Returns:

  • (Array) —

    the different parts of the ‘block` node



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# File 'lib/rubocop/ast/node/block_node.rb', line 111

def node_parts
  to_a
end

#opening_delimiter ⇒ String

The opening delimiter for this ‘block` literal.

Returns:

  • (String) —

    the opening delimiter for the ‘block` literal



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# File 'lib/rubocop/ast/node/block_node.rb', line 66

def opening_delimiter
  delimiters.first
end

#send_node ⇒ SendNode

The ‘send` node associated with this block.

Returns:

  • (SendNode) —

    the ‘send` node associated with the `block` node



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# File 'lib/rubocop/ast/node/block_node.rb', line 17

def send_node
  node_parts[0]
end

#single_line? ⇒ Boolean

Checks whether this is a single line block. This is overridden here because the general version in ‘Node` does not work for `block` nodes.

Returns:

  • (Boolean) —

    whether the ‘block` literal is on a single line



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# File 'lib/rubocop/ast/node/block_node.rb', line 81

def single_line?
  loc.begin.line == loc.end.line
end

#void_context? ⇒ Boolean

Checks whether this node body is a void context.

Returns:

  • (Boolean) —

    whether the ‘block` node body is a void context



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# File 'lib/rubocop/ast/node/block_node.rb', line 103

def void_context?
  VOID_CONTEXT_METHODS.include?(send_node.method_name)
end