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Merge pull request #7697 from Homebrew/dependabot/bundler/Library/Hom…
…ebrew/rubocop-performance-1.6.1 build(deps): bump rubocop-performance from 1.6.0 to 1.6.1 in /Library/Homebrew
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...e/ruby/2.6.0/gems/rubocop-performance-1.6.0/lib/rubocop/cop/mixin/regexp_metacharacter.rb
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...e/ruby/2.6.0/gems/rubocop-performance-1.6.1/lib/rubocop/cop/mixin/regexp_metacharacter.rb
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,76 @@ | ||
| # frozen_string_literal: true | ||
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| module RuboCop | ||
| module Cop | ||
| # Common functionality for handling regexp metacharacters. | ||
| module RegexpMetacharacter | ||
| private | ||
|
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| def literal_at_start?(regexp) | ||
| return true if literal_at_start_with_backslash_a?(regexp) | ||
|
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| !safe_multiline? && literal_at_start_with_caret?(regexp) | ||
| end | ||
|
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| def literal_at_end?(regexp) | ||
| return true if literal_at_end_with_backslash_z?(regexp) | ||
|
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| !safe_multiline? && literal_at_end_with_dollar?(regexp) | ||
| end | ||
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| 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/.match?(regex_str) | ||
| end | ||
|
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| 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/.match?(regex_str) | ||
| end | ||
|
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| 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/.match?(regex_str) | ||
| end | ||
|
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| 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/.match?(regex_str) | ||
| end | ||
|
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| 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 | ||
|
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| 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 | ||
|
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| def safe_multiline? | ||
| cop_config.fetch('SafeMultiline', true) | ||
| end | ||
| end | ||
| end | ||
| end |
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