+ ruby28.y: branch parser (#677)

.gitignore

@@ -29,5 +29,6 @@ lib/parser/ruby24.rb
 lib/parser/ruby25.rb
 lib/parser/ruby26.rb
 lib/parser/ruby27.rb
+lib/parser/ruby28.rb
 lib/parser/macruby.rb
 lib/parser/rubymotion.rb

Rakefile

@@ -32,6 +32,7 @@ GENERATED_FILES = %w(lib/parser/lexer.rb
                      lib/parser/ruby25.rb
                      lib/parser/ruby26.rb
                      lib/parser/ruby27.rb
+                     lib/parser/ruby28.rb
                      lib/parser/macruby.rb
                      lib/parser/rubymotion.rb)
 

lib/parser/all.rb

@@ -10,3 +10,4 @@
 require 'parser/ruby25'
 require 'parser/ruby26'
 require 'parser/ruby27'
+require 'parser/ruby28'

lib/parser/current.rb

@@ -83,6 +83,15 @@ def warn_syntax_deviation(feature, version)
     require 'parser/ruby27'
     CurrentRuby = Ruby27
 
+  when /^2\.8\./
+    current_version = '2.8.0-dev'
+    if RUBY_VERSION != current_version
+      warn_syntax_deviation 'parser/ruby28', current_version
+    end
+
+    require 'parser/ruby28'
+    CurrentRuby = Ruby28
+
   else # :nocov:
     # Keep this in sync with released Ruby.
     warn_syntax_deviation 'parser/ruby27', '2.7.x'