module RuboCop::Cop::RegexpMetacharacter
Common functionality for handling regexp metacharacters.
Private Instance Methods
drop_end_metacharacter(regexp_string)
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# File lib/rubocop/cop/mixin/regexp_metacharacter.rb, line 63 def drop_end_metacharacter(regexp_string) if regexp_string.end_with?('\\z') regexp_string.chomp('\z') # drop `\z` anchor else regexp_string.chop # drop `$` anchor end end
drop_start_metacharacter(regexp_string)
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# File lib/rubocop/cop/mixin/regexp_metacharacter.rb, line 55 def drop_start_metacharacter(regexp_string) if regexp_string.start_with?('\\A') regexp_string[2..-1] # drop `\A` anchor else regexp_string[1..-1] # drop `^` anchor end end
literal_at_end?(regexp)
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# File lib/rubocop/cop/mixin/regexp_metacharacter.rb, line 15 def literal_at_end?(regexp) return true if literal_at_end_with_backslash_z?(regexp) !safe_multiline? && literal_at_end_with_dollar?(regexp) end
literal_at_end_with_backslash_z?(regex_str)
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# File lib/rubocop/cop/mixin/regexp_metacharacter.rb, line 41 def literal_at_end_with_backslash_z?(regex_str) # is this regexp 'literal' in the sense of only matching literal # chars, rather than using metachars like . and * and so on? # also, is it anchored at the end of the string? /\A(?:#{Util::LITERAL_REGEX})+\\z\z/o.match?(regex_str) end
literal_at_end_with_dollar?(regex_str)
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# File lib/rubocop/cop/mixin/regexp_metacharacter.rb, line 48 def literal_at_end_with_dollar?(regex_str) # is this regexp 'literal' in the sense of only matching literal # chars, rather than using metachars like . and * and so on? # also, is it anchored at the end of the string? /\A(?:#{Util::LITERAL_REGEX})+\$\z/o.match?(regex_str) end
literal_at_start?(regexp)
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# File lib/rubocop/cop/mixin/regexp_metacharacter.rb, line 9 def literal_at_start?(regexp) return true if literal_at_start_with_backslash_a?(regexp) !safe_multiline? && literal_at_start_with_caret?(regexp) end
literal_at_start_with_backslash_a?(regex_str)
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# File lib/rubocop/cop/mixin/regexp_metacharacter.rb, line 21 def literal_at_start_with_backslash_a?(regex_str) # is this regexp 'literal' in the sense of only matching literal # chars, rather than using metachars like `.` and `*` and so on? # also, is it anchored at the start of the string? # (tricky: \s, \d, and so on are metacharacters, but other characters # escaped with a slash are just literals. LITERAL_REGEX takes all # that into account.) /\A\\A(?:#{Util::LITERAL_REGEX})+\z/o.match?(regex_str) end
literal_at_start_with_caret?(regex_str)
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# File lib/rubocop/cop/mixin/regexp_metacharacter.rb, line 31 def literal_at_start_with_caret?(regex_str) # is this regexp 'literal' in the sense of only matching literal # chars, rather than using metachars like `.` and `*` and so on? # also, is it anchored at the start of the string? # (tricky: \s, \d, and so on are metacharacters, but other characters # escaped with a slash are just literals. LITERAL_REGEX takes all # that into account.) /\A\^(?:#{Util::LITERAL_REGEX})+\z/o.match?(regex_str) end
safe_multiline?()
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# File lib/rubocop/cop/mixin/regexp_metacharacter.rb, line 71 def safe_multiline? cop_config.fetch('SafeMultiline', true) end