Use require_relative in the Regexp::Parser codebase

If there are many searches in the `$LOAD_PATH` in the user environment,
require will perform unnecessary searches that are not needed.
In contrast, `require_relative` is efficient because it uses a relative path.

Author: koic

lib/regexp_parser.rb

@@ -1,6 +1,6 @@
-require 'regexp_parser/version'
-require 'regexp_parser/token'
-require 'regexp_parser/scanner'
-require 'regexp_parser/syntax'
-require 'regexp_parser/lexer'
-require 'regexp_parser/parser'
+require_relative 'regexp_parser/version'
+require_relative 'regexp_parser/token'
+require_relative 'regexp_parser/scanner'
+require_relative 'regexp_parser/syntax'
+require_relative 'regexp_parser/lexer'
+require_relative 'regexp_parser/parser'

lib/regexp_parser/expression.rb

@@ -1,37 +1,37 @@
-require 'regexp_parser/error'
+require_relative 'error'
 
-require 'regexp_parser/expression/shared'
-require 'regexp_parser/expression/base'
-require 'regexp_parser/expression/quantifier'
-require 'regexp_parser/expression/subexpression'
-require 'regexp_parser/expression/sequence'
-require 'regexp_parser/expression/sequence_operation'
+require_relative 'expression/shared'
+require_relative 'expression/base'
+require_relative 'expression/quantifier'
+require_relative 'expression/subexpression'
+require_relative 'expression/sequence'
+require_relative 'expression/sequence_operation'
 
-require 'regexp_parser/expression/classes/alternation'
-require 'regexp_parser/expression/classes/anchor'
-require 'regexp_parser/expression/classes/backreference'
-require 'regexp_parser/expression/classes/character_set'
-require 'regexp_parser/expression/classes/character_set/intersection'
-require 'regexp_parser/expression/classes/character_set/range'
-require 'regexp_parser/expression/classes/character_type'
-require 'regexp_parser/expression/classes/conditional'
-require 'regexp_parser/expression/classes/escape_sequence'
-require 'regexp_parser/expression/classes/free_space'
-require 'regexp_parser/expression/classes/group'
-require 'regexp_parser/expression/classes/keep'
-require 'regexp_parser/expression/classes/literal'
-require 'regexp_parser/expression/classes/posix_class'
-require 'regexp_parser/expression/classes/root'
-require 'regexp_parser/expression/classes/unicode_property'
+require_relative 'expression/classes/alternation'
+require_relative 'expression/classes/anchor'
+require_relative 'expression/classes/backreference'
+require_relative 'expression/classes/character_set'
+require_relative 'expression/classes/character_set/intersection'
+require_relative 'expression/classes/character_set/range'
+require_relative 'expression/classes/character_type'
+require_relative 'expression/classes/conditional'
+require_relative 'expression/classes/escape_sequence'
+require_relative 'expression/classes/free_space'
+require_relative 'expression/classes/group'
+require_relative 'expression/classes/keep'
+require_relative 'expression/classes/literal'
+require_relative 'expression/classes/posix_class'
+require_relative 'expression/classes/root'
+require_relative 'expression/classes/unicode_property'
 
-require 'regexp_parser/expression/methods/construct'
-require 'regexp_parser/expression/methods/human_name'
-require 'regexp_parser/expression/methods/match'
-require 'regexp_parser/expression/methods/match_length'
-require 'regexp_parser/expression/methods/negative'
-require 'regexp_parser/expression/methods/options'
-require 'regexp_parser/expression/methods/parts'
-require 'regexp_parser/expression/methods/printing'
-require 'regexp_parser/expression/methods/strfregexp'
-require 'regexp_parser/expression/methods/tests'
-require 'regexp_parser/expression/methods/traverse'
+require_relative 'expression/methods/construct'
+require_relative 'expression/methods/human_name'
+require_relative 'expression/methods/match'
+require_relative 'expression/methods/match_length'
+require_relative 'expression/methods/negative'
+require_relative 'expression/methods/options'
+require_relative 'expression/methods/parts'
+require_relative 'expression/methods/printing'
+require_relative 'expression/methods/strfregexp'
+require_relative 'expression/methods/tests'
+require_relative 'expression/methods/traverse'

lib/regexp_parser/parser.rb

@@ -1,5 +1,5 @@
-require 'regexp_parser/error'
-require 'regexp_parser/expression'
+require_relative 'error'
+require_relative 'expression'
 
 class Regexp::Parser
   include Regexp::Expression

lib/regexp_parser/scanner/errors/scanner_error.rb

@@ -1,4 +1,4 @@
-require 'regexp_parser/error'
+require_relative '../../../regexp_parser/error'
 
 class Regexp::Scanner
   # General scanner error (catch all)

lib/regexp_parser/scanner/scanner.rl

@@ -640,9 +640,9 @@
   *|;
 }%%
 
-require 'regexp_parser/scanner/errors/scanner_error'
-require 'regexp_parser/scanner/errors/premature_end_error'
-require 'regexp_parser/scanner/errors/validation_error'
+require_relative 'scanner/errors/scanner_error'
+require_relative 'scanner/errors/premature_end_error'
+require_relative 'scanner/errors/validation_error'
 
 class Regexp::Scanner
   # Scans the given regular expression text, or Regexp object and collects the

lib/regexp_parser/syntax.rb

@@ -1,4 +1,4 @@
-require 'regexp_parser/error'
+require_relative 'error'
 
 module Regexp::Syntax
   class SyntaxError < Regexp::Parser::Error; end

lib/regexp_parser/syntax/token.rb

@@ -20,19 +20,19 @@ module FreeSpace
 
 
 # Load all the token files, they will populate the Map constant.
-require 'regexp_parser/syntax/token/anchor'
-require 'regexp_parser/syntax/token/assertion'
-require 'regexp_parser/syntax/token/backreference'
-require 'regexp_parser/syntax/token/posix_class'
-require 'regexp_parser/syntax/token/character_set'
-require 'regexp_parser/syntax/token/character_type'
-require 'regexp_parser/syntax/token/conditional'
-require 'regexp_parser/syntax/token/escape'
-require 'regexp_parser/syntax/token/group'
-require 'regexp_parser/syntax/token/keep'
-require 'regexp_parser/syntax/token/meta'
-require 'regexp_parser/syntax/token/quantifier'
-require 'regexp_parser/syntax/token/unicode_property'
+require_relative '../syntax/token/anchor'
+require_relative '../syntax/token/assertion'
+require_relative '../syntax/token/backreference'
+require_relative '../syntax/token/posix_class'
+require_relative '../syntax/token/character_set'
+require_relative '../syntax/token/character_type'
+require_relative '../syntax/token/conditional'
+require_relative '../syntax/token/escape'
+require_relative '../syntax/token/group'
+require_relative '../syntax/token/keep'
+require_relative '../syntax/token/meta'
+require_relative '../syntax/token/quantifier'
+require_relative '../syntax/token/unicode_property'
 
 
 # After loading all the tokens the map is full. Extract all tokens and types

lib/regexp_parser/syntax/versions.rb

@@ -3,6 +3,6 @@
 #
 # Aliases for the latest patch version are provided as 'ruby/n.n',
 # e.g. 'ruby/1.9' refers to Ruby v1.9.3.
-Dir[File.expand_path('../versions/*.rb', __FILE__)].sort.each { |f| require f }
+Dir[File.expand_path('../versions/*.rb', __FILE__)].sort.each { |f| require_relative f }
 
 Regexp::Syntax::CURRENT = Regexp::Syntax.for("ruby/#{RUBY_VERSION}")