Remove warning on Ruby 3.x

Author: jaynetics

README.md

@@ -8,8 +8,8 @@ A Ruby gem for tokenizing, parsing, and transforming regular expressions.
   * A scanner/tokenizer based on [Ragel](http://www.colm.net/open-source/ragel/)
   * A lexer that produces a "stream" of token objects.
   * A parser that produces a "tree" of Expression objects (OO API)
-* Runs on Ruby 2.x and JRuby runtimes
-* Recognizes Ruby 1.8, 1.9, and 2.x regular expressions [See Supported Syntax](#supported-syntax)
+* Runs on Ruby 2.x, 3.x and JRuby runtimes
+* Recognizes Ruby 1.8, 1.9, 2.x and 3.x regular expressions [See Supported Syntax](#supported-syntax)
 
 
 _For examples of regexp_parser in use, see [Example Projects](#example-projects)._
@@ -317,7 +317,7 @@ Expression class. See the next section for details._
 
 ## Supported Syntax
 The three modules support all the regular expression syntax features of Ruby 1.8,
-1.9, and 2.x:
+1.9, 2.x and 3.x:
 
 _Note that not all of these are available in all versions of Ruby_
 

lib/regexp_parser/expression.rb

@@ -80,10 +80,12 @@ def repetitions
       return 1..1 unless quantified?
       min = quantifier.min
       max = quantifier.max < 0 ? Float::INFINITY : quantifier.max
-      # fix Range#minmax - https://bugs.ruby-lang.org/issues/15807
-      (min..max).tap do |r|
-        r.define_singleton_method(:minmax) { [min, max] } unless RUBY_VERSION.to_f > 2.6
+      range = min..max
+      # fix Range#minmax on old Rubies - https://bugs.ruby-lang.org/issues/15807
+      if RUBY_VERSION.to_f < 2.7
+        range.define_singleton_method(:minmax) { [min, max] }
       end
+      range
     end
 
     def greedy?

lib/regexp_parser/syntax/version_lookup.rb

@@ -74,9 +74,9 @@ def comparable_version(name)
   end
 
   def warn_if_future_version(const_name)
-    return if comparable_version(const_name) < comparable_version('3.0.0')
+    return if comparable_version(const_name) < comparable_version('4.0.0')
 
-    warn('This library has only been tested up to Ruby 2.x, '\
+    warn('This library has only been tested up to Ruby 3.x, '\
          "but you are running with #{const_get(const_name).inspect}")
   end
 end