Class: RuboCop::AST::RegexpNode

Relationships & Source Files
Super Chains via Extension / Inclusion / Inheritance
Class Chain: self, `Node`, `NodePattern::Macros`, Parser::AST::Node
Instance Chain: self, `Node`, `Descendence`, `Sexp`, Parser::AST::Node
Inherits:	RuboCop::AST::Node Object Parser::AST::Node RuboCop::AST::Node RuboCop::AST::RegexpNode
Defined in:	lib/rubocop/ast/node/regexp_node.rb

Overview

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

Constant Summary

OPTIONS = private
# File 'lib/rubocop/ast/node/regexp_node.rb', line 9

{
  x: Regexp::EXTENDED,
  i: Regexp::IGNORECASE,
  m: Regexp::MULTILINE,
  n: Regexp::NOENCODING,
  u: Regexp::FIXEDENCODING,
  o: 0
}.freeze

`Node` - Inherited

ASSIGNMENTS, BASIC_CONDITIONALS, BASIC_LITERALS, COMPARISON_OPERATORS, COMPOSITE_LITERALS, CONDITIONALS, EMPTY_CHILDREN, EMPTY_PROPERTIES, EQUALS_ASSIGNMENTS, FALSEY_LITERALS, GROUP_FOR_TYPE, IMMUTABLE_LITERALS, KEYWORDS, LITERALS, LITERAL_RECURSIVE_METHODS, LITERAL_RECURSIVE_TYPES, LOOP_TYPES, MUTABLE_LITERALS, OPERATOR_KEYWORDS, POST_CONDITION_LOOP_TYPES, REFERENCES, SHORTHAND_ASSIGNMENTS, SPECIAL_KEYWORDS, TRUTHY_LITERALS, VARIABLES

Class Method Summary

`Node` - Inherited

.new,
.def_recursive_literal_predicate	Define a `recursive_?` predicate method for the given node kind.

`NodePattern::Macros` - Extended

def_node_matcher	Define a method which applies a pattern to an AST node.
def_node_search	Define a method which recurses over the descendants of an AST node, checking whether any of them match the provided pattern.

Instance Attribute Summary

#extended? ⇒ Bool readonly
#fixed_encoding? ⇒ Bool readonly
#ignore_case? ⇒ Bool readonly
#interpolation? ⇒ Bool readonly
#multiline_mode? ⇒ Bool readonly
#no_encoding? ⇒ Bool readonly
#percent_r_literal? ⇒ Bool readonly
#single_interpolation? ⇒ Bool readonly
#slash_literal? ⇒ Bool readonly

`Node` - Inherited

#any_block_type?, #any_def_type?, #any_match_pattern_type?, #argument?, #argument_type?, #assignment?, #basic_conditional?, #basic_literal?, #boolean_type?, #call_type?, #chained?, #complete?, #conditional?, #empty_source?, #equals_asgn?, #falsey_literal?, #guard_clause?, #immutable_literal?, #keyword?, #literal?,

#loop_keyword?

Note	`loop { }` is a normal method call and thus not a loop keyword.

#multiline?

Predicates.

#mutable_literal?, #numeric_type?, #operator_keyword?,

#parent

Returns the parent node, or nil if the receiver is a root node.

#parent?, #parenthesized_call?, #post_condition_loop?,

#pure?

Some expressions are evaluated for their value, some for their side effects, and some for both.

#range_type?, #reference?, #root?,

#send_type?

Most nodes are of 'send' type, so this method is defined separately to make this check as fast as possible.

#shorthand_asgn?, #single_line?, #special_keyword?, #truthy_literal?,

#value_used?

Some expressions are evaluated for their value, some for their side effects, and some for both If we know that an expression is useful only for its side effects, that means we can transform it in ways which preserve the side effects, but change the return value So, does the return value of this node matter? If we changed it to (…; nil), might that affect anything?

#variable?, #begin_value_used?, #case_if_value_used?, #for_value_used?, #while_until_value_used?

Instance Method Summary

#content ⇒ String
#delimiter?(char) ⇒ Bool
#delimiters ⇒ String
#options ⇒ Integer

Note
The 'o' option is ignored.
#regopt ⇒ RuboCop::AST::Node
#to_regexp ⇒ Regexp
#regopt_include?(option) ⇒ Boolean private

`Node` - Inherited

#ancestors

Returns an array of ancestor nodes.

#assignment_or_similar?

Some cops treat the shovel operator as a kind of assignment.

#class_constructor?, #class_definition?, #complete!, #const_name, #defined_module, #defined_module_name,

#each_ancestor

Calls the given block for each ancestor node from parent to root.

#first_line, #global_const?, #lambda?, #lambda_or_proc?, #last_line,

#left_sibling

Use is discouraged, this is a potentially slow method and can lead to even slower algorithms.

#left_siblings

Use is discouraged, this is a potentially slow method and can lead to even slower algorithms.

#line_count,

#loc?

Shortcut to safely check if a location is present.

#loc_is?

Shortcut to safely test a particular location, even if this location does not exist or is nil.

#match_guard_clause?, #module_definition?,

#node_parts

Common destructuring method.

#nonempty_line_count,

#parent_module_name

Searching the AST.

#proc?, #receiver, #recursive_basic_literal?, #recursive_literal?,

#right_sibling

Use is discouraged, this is a potentially slow method and can lead to even slower algorithms.

#right_siblings

Use is discouraged, this is a potentially slow method and can lead to even slower algorithms.

#sibling_index

Returns the index of the receiver node in its siblings.

#source

Note	Some rare nodes may have no source, like `s(:args)` in `foo {}`.

#source_length, #source_range, #str_content, #struct_constructor?,

#type?

Determine if the node is one of several node types in a single query Allows specific single node types, as well as "grouped" types (e.g.

#updated

Override Node#updated so that AST::Processor does not try to mutate our ASTs.

#defined_module0, #new_class_or_module_block?, #parent_module_name_for_block, #parent_module_name_for_sclass, #parent_module_name_part, #visit_ancestors

`Descendence` - Included

#child_nodes	Returns an array of child nodes.
#descendants	Returns an array of descendant nodes.
#each_child_node	Calls the given block for each child node.
#each_descendant	Calls the given block for each descendant node with depth first order.
#each_node	Calls the given block for the receiver and each descendant node in depth-first order.

`Sexp` - Included

#s	Creates a `Node` with type `type` and children `children`.

Constructor Details

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

Instance Attribute Details

#extended? ⇒ `Bool` (readonly)

Returns:

(Bool) —

if regexp uses the extended regopt

[ GitHub ]

# File 'lib/rubocop/ast/node/regexp_node.rb', line 72


def extended?
  regopt_include?(:x)
end

#fixed_encoding? ⇒ `Bool` (readonly)

Returns:

(Bool) —

if regexp uses the fixed-encoding regopt

[ GitHub ]

# File 'lib/rubocop/ast/node/regexp_node.rb', line 92


def fixed_encoding?
  regopt_include?(:u)
end

#ignore_case? ⇒ `Bool` (readonly)

Returns:

(Bool) —

if regexp uses the ignore-case regopt

[ GitHub ]

# File 'lib/rubocop/ast/node/regexp_node.rb', line 77


def ignore_case?
  regopt_include?(:i)
end

#interpolation? ⇒ `Bool` (readonly)

Returns:

(Bool) —

if regexp contains interpolation

[ GitHub ]

# File 'lib/rubocop/ast/node/regexp_node.rb', line 62


def interpolation?
  children.any?(&:begin_type?)
end

#multiline_mode? ⇒ `Bool` (readonly)

Returns:

(Bool) —

if regexp uses the multiline regopt

[ GitHub ]

# File 'lib/rubocop/ast/node/regexp_node.rb', line 67


def multiline_mode?
  regopt_include?(:m)
end

#no_encoding? ⇒ `Bool` (readonly)

Returns:

(Bool) —

if regexp uses the no-encoding regopt

[ GitHub ]

# File 'lib/rubocop/ast/node/regexp_node.rb', line 87


def no_encoding?
  regopt_include?(:n)
end

#percent_r_literal? ⇒ `Bool` (readonly)

Returns:

(Bool) —

if the regexp is a %r… literal (using any delimiters)

[ GitHub ]

# File 'lib/rubocop/ast/node/regexp_node.rb', line 47


def percent_r_literal?
  !slash_literal?
end

#single_interpolation? ⇒ `Bool` (readonly)

Returns:

(Bool) —

if regexp uses the single-interpolation regopt

[ GitHub ]

# File 'lib/rubocop/ast/node/regexp_node.rb', line 82


def single_interpolation?
  regopt_include?(:o)
end

#slash_literal? ⇒ `Bool` (readonly)

Returns:

(Bool) —

if the regexp is a /…/ literal

[ GitHub ]

# File 'lib/rubocop/ast/node/regexp_node.rb', line 42


def slash_literal?
  loc.begin.source == '/'
end

Instance Method Details

#content ⇒ `String`

Returns:

(String) —

a string of regexp content

[ GitHub ]

# File 'lib/rubocop/ast/node/regexp_node.rb', line 37


def content
  children.select(&:str_type?).map(&:str_content).join
end

#delimiter?(char) ⇒ `Bool`

Returns:

(Bool) —

if char is one of the delimiters

[ GitHub ]

# File 'lib/rubocop/ast/node/regexp_node.rb', line 57


def delimiter?(char)
  delimiters.include?(char)
end

#delimiters ⇒ `String`

Returns:

(String) —

the regexp delimiters (without %r)

[ GitHub ]

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


def delimiters
  [loc.begin.source[-1], loc.end.source[0]]
end

#options ⇒ `Integer`

Note	The 'o' option is ignored.

Returns:

(Integer) —

the Regexp option bits as returned by Regexp#options

[ GitHub ]

# File 'lib/rubocop/ast/node/regexp_node.rb', line 32


def options
  regopt.children.map { |opt| OPTIONS.fetch(opt) }.inject(0, :|)
end

#regopt ⇒ RuboCop::AST::Node

Returns:

(RuboCop::AST::Node) —

a regopt node

[ GitHub ]

# File 'lib/rubocop/ast/node/regexp_node.rb', line 25


def regopt
  children.last
end

#regopt_include?(option) ⇒ `Boolean` (private)

[ GitHub ]

# File 'lib/rubocop/ast/node/regexp_node.rb', line 98


def regopt_include?(option)
  regopt.children.include?(option)
end

#to_regexp ⇒ `Regexp`

Returns:

(Regexp) —

a regexp of this node

[ GitHub ]

# File 'lib/rubocop/ast/node/regexp_node.rb', line 20


def to_regexp
  Regexp.new(content, options)
end

Class: RuboCop::AST::RegexpNode

Overview

Constant Summary

Node - Inherited

Class Method Summary

Node - Inherited

NodePattern::Macros - Extended

Instance Attribute Summary

Node - Inherited

Instance Method Summary

Node - Inherited

Descendence - Included

Sexp - Included

Constructor Details

Instance Attribute Details

#extended? ⇒ Bool (readonly)

#fixed_encoding? ⇒ Bool (readonly)

#ignore_case? ⇒ Bool (readonly)

#interpolation? ⇒ Bool (readonly)

#multiline_mode? ⇒ Bool (readonly)

#no_encoding? ⇒ Bool (readonly)

#percent_r_literal? ⇒ Bool (readonly)

#single_interpolation? ⇒ Bool (readonly)

#slash_literal? ⇒ Bool (readonly)

Instance Method Details

#content ⇒ String

#delimiter?(char) ⇒ Bool

#delimiters ⇒ String

#options ⇒ Integer

#regopt ⇒ RuboCop::AST::Node

#regopt_include?(option) ⇒ Boolean (private)

#to_regexp ⇒ Regexp

`Node` - Inherited

`Node` - Inherited

`NodePattern::Macros` - Extended

`Node` - Inherited

`Node` - Inherited

`Descendence` - Included

`Sexp` - Included

#extended? ⇒ `Bool` (readonly)

#fixed_encoding? ⇒ `Bool` (readonly)

#ignore_case? ⇒ `Bool` (readonly)

#interpolation? ⇒ `Bool` (readonly)

#multiline_mode? ⇒ `Bool` (readonly)

#no_encoding? ⇒ `Bool` (readonly)

#percent_r_literal? ⇒ `Bool` (readonly)

#single_interpolation? ⇒ `Bool` (readonly)

#slash_literal? ⇒ `Bool` (readonly)

#content ⇒ `String`

#delimiter?(char) ⇒ `Bool`

#delimiters ⇒ `String`

#options ⇒ `Integer`

#regopt_include?(option) ⇒ `Boolean` (private)

#to_regexp ⇒ `Regexp`