Class: RuboCop::Cop::Style::HashSyntax

Inherits:
Cop
  • Object
show all
Includes:
ConfigurableEnforcedStyle
Defined in:
lib/rubocop/cop/style/hash_syntax.rb

Overview

This cop checks hash literal syntax.

It can enforce either the use of the class hash rocket syntax or the use of the newer Ruby 1.9 syntax (when applicable).

A separate offense is registered for each problematic pair.

Constant Summary collapse

MSG_19 =
'Use the new Ruby 1.9 hash syntax.'
MSG_RUBY19_NO_MIXED_KEYS =
"Don't mix styles in the same hash."
MSG_HASH_ROCKETS =
'Use hash rockets syntax.'

Constants included from Util

Util::ASGN_NODES, Util::BASIC_LITERALS, Util::EQUALS_ASGN_NODES, Util::LITERALS, Util::OPERATOR_METHODS, Util::PROC_NEW_NODE, Util::SHORTHAND_ASGN_NODES

Instance Attribute Summary

Attributes inherited from Cop

#config, #corrections, #offenses, #processed_source

Instance Method Summary collapse

Methods included from ConfigurableEnforcedStyle

#ambiguous_style_detected, #correct_style_detected, #detected_style, #detected_style=, #no_acceptable_style!, #no_acceptable_style?, #opposite_style_detected, #parameter_name, #style, #style_detected, #unexpected_style_detected

Methods inherited from Cop

#add_offense, all, #config_to_allow_offenses, #config_to_allow_offenses=, #cop_config, cop_name, #cop_name, cop_type, #correct, #debug?, #details, #display_cop_names?, #display_style_guide?, #excluded_file?, #extra_details?, inherited, #initialize, #join_force?, lint?, match?, #message, non_rails, qualified_cop_name, rails?, #reference_url, #relevant_file?, #style_guide_url

Methods included from NodePattern::Macros

#def_node_matcher, #def_node_search

Methods included from AutocorrectLogic

#autocorrect?, #autocorrect_enabled?, #autocorrect_requested?, #support_autocorrect?

Methods included from IgnoredNode

#ignore_node, #ignored_node?, #part_of_ignored_node?

Methods included from Util

begins_its_line?, block_length, command?, comment_line?, const_name, directions, first_part_of_call_chain, lambda?, lambda_or_proc?, line_range, move_pos, numeric_range_size, on_node, operator?, parentheses?, proc?, range_with_surrounding_comma, range_with_surrounding_space, source_range, strip_quotes, within_node?

Methods included from PathUtil

hidden?, issue_deprecation_warning, match_path?, relative_path

Constructor Details

This class inherits a constructor from RuboCop::Cop::Cop

Instance Method Details

#alternative_styleObject


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# File 'lib/rubocop/cop/style/hash_syntax.rb', line 72

def alternative_style
  case style
  when :hash_rockets then
    :ruby19
  when :ruby19, :ruby19_no_mixed_keys then
    :hash_rockets
  end
end

#autocorrect(node) ⇒ Object


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# File 'lib/rubocop/cop/style/hash_syntax.rb', line 60

def autocorrect(node)
  lambda do |corrector|
    if style == :hash_rockets || @force_hash_rockets
      autocorrect_hash_rockets(corrector, node)
    elsif style == :ruby19_no_mixed_keys
      autocorrect_ruby19_no_mixed_keys(corrector, node)
    else
      autocorrect_ruby19(corrector, node)
    end
  end
end

#hash_rockets_check(node) ⇒ Object


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# File 'lib/rubocop/cop/style/hash_syntax.rb', line 42

def hash_rockets_check(node)
  pairs = *node

  check(pairs, ':', MSG_HASH_ROCKETS)
end

#on_hash(node) ⇒ Object


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# File 'lib/rubocop/cop/style/hash_syntax.rb', line 21

def on_hash(node)
  if cop_config['UseHashRocketsWithSymbolValues']
    pairs = *node
    @force_hash_rockets = pairs.any? { |p| symbol_value?(p) }
  end

  if style == :hash_rockets || @force_hash_rockets
    hash_rockets_check(node)
  elsif style == :ruby19_no_mixed_keys
    ruby19_no_mixed_keys_check(node)
  else
    ruby19_check(node)
  end
end

#ruby19_check(node) ⇒ Object


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# File 'lib/rubocop/cop/style/hash_syntax.rb', line 36

def ruby19_check(node)
  pairs = *node

  check(pairs, '=>', MSG_19) if sym_indices?(pairs)
end

#ruby19_no_mixed_keys_check(node) ⇒ Object


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# File 'lib/rubocop/cop/style/hash_syntax.rb', line 48

def ruby19_no_mixed_keys_check(node)
  pairs = *node

  if @force_hash_rockets
    check(pairs, ':', MSG_HASH_ROCKETS)
  elsif sym_indices?(pairs)
    check(pairs, '=>', MSG_19)
  else
    check(pairs, ':', MSG_RUBY19_NO_MIXED_KEYS)
  end
end