Remove Racc as it's now replaced by the parser gem

But keep the Opal version as it's needed by the parser gem.

Author: elia

Gemfile

@@ -9,10 +9,6 @@ tilt_version      = ENV['TILT_VERSION']
 rack_version      = ENV['RACK_VERSION']
 sprockets_version = ENV['SPROCKETS_VERSION']
 
-# Stick with older racc until
-# https://github.com/tenderlove/racc/issues/22
-# is solved.
-gem 'racc', '< 1.4.10', platform: :jruby
 gem 'json', '< 1.8.1',  platform: :ruby if ruby_version < v['2.2']
 gem 'rack-test', '< 0.8' if ruby_version <= v['2.0']
 gem 'rubysl', platform: :rbx

Guardfile

@@ -49,7 +49,6 @@ class ::Guard::Opal < Plugin
     path = m[0]
     puts color("Searching specs for #{m[0]}...", :yellow)
     case path
-    when %r{grammar\.y$}  then system 'rake racc'
     when %r{^spec/lib}     then rspec path
     when %r{^spec/ruby} then mspec path
     when %r{^opal/corelib}

HACKING.md

@@ -195,38 +195,4 @@ Array#permutation_generates_from_a_defensive_copy,_ignoring_mutations
 
 ## Parser
 
-## Enabling debug output from Racc
-
-To enable debug output in the Racc grammar set the `RACC_DEBUG` env var and recompile the grammar. While the env variable is set the parser will output the debug info for the parsing process.
-
-```bash
-$ export RACC_DEBUG=true
-$ bundle exec rake racc               # recompile the grammar
-$ bundle exec exe/opal --sexp -e "42" # ask Opal for the SExp of some code
-
-read    :tINTEGER(tINTEGER) [42, [1, 0]]
-
-shift   tINTEGER
-        [ (tINTEGER [42, [1, 0]]) ]
-
-…cut…
-
-shift   $end
-        [ (program (:int, 42)) ($end [false, [1, 2]]) ($end [false, [1, 2]]) ]
-
-goto    403
-        [ 0 1 97 403 ]
-
-accept
-
-(:int, 42)
-```
-
-When done unset the env variable and recompile the grammar.
-
-```bash
-$ unset RACC_DEBUG
-$ bundle exec rake racc               # recompile the grammar
-$ bundle exec exe/opal --sexp -e "42" # ask Opal for the SExp of some code
-(:int, 42)
-```
+Opal relies on the `parser` gem, see debug/development documentation there to know more about its internals: https://whitequark.github.io/parser/.

docs/compiler.md

@@ -9,27 +9,12 @@ other runtime helpers.
 
 The compiler can be broken down into 3 separate stages:
 
-* lexing
-* parsing
+* lexing/parsing
 * code generation
 
-### Lexer
+### Lexer/Parser
 
-The [opal lexer][lexer] is implemented in pure ruby using
-the `StringScanner` class from the opal stdlib. The source code is scanned
-and tokens are then provided to the parser. This process simply converts
-the ruby code given as a string, into a list of tokens representing the
-parts of the ruby code.
-
-### Parser
-
-The [opal parser][parser] is implemented using a standard
-bison like syntax, but relies on `racc`, a ruby implementation of yacc/bison
-which is again available in the standard library. The parser takes these tokens
-generated by the lexer and builds a syntax tree representing the ruby code.
-This syntax tree is represented by [sexps][sexps]. As
-ruby is such a complex and dynamic language, there is a lot of interaction
-between the parser and the lexer, namely through a preserved `lex_state`.
+The [opal parser][parser] relies on the `parser` gem, see debug/development documentation there to know more about its internals: https://whitequark.github.io/parser/.
 
 ### Code generation
 
@@ -42,8 +27,6 @@ code as well as a reference back to the original sexp which is useful for
 generating source maps afterwards.
 
 
-[lexer]: https://github.com/opal/opal/tree/master/lib/opal/parser/lexer.rb
-[parser]: https://github.com/opal/opal/tree/master/lib/opal/parser/grammar.y
 [sexps]: https://github.com/opal/opal/tree/master/lib/opal/parser/sexp.rb
 [compiler]: https://github.com/opal/opal/tree/master/lib/opal/compiler.rb
 [fragments]: https://github.com/opal/opal/tree/master/lib/opal/fragment.rb

opal.gemspec

@@ -41,7 +41,6 @@ Gem::Specification.new do |spec|
 
   spec.add_development_dependency 'sourcemap', '~> 0.1.0'
   spec.add_development_dependency 'rake', '~> 10.0'
-  spec.add_development_dependency 'racc'
   spec.add_development_dependency 'rspec', '~> 3.6.0'
   spec.add_development_dependency 'octokit', '~> 2.4.0'
   spec.add_development_dependency 'bundler', '~> 1.5'

tasks/building.rake

@@ -55,12 +55,6 @@ task :dist do
   end.map(&:value).map(&method(:puts))
 end
 
-desc 'Rebuild grammar.rb for opal parser'
-task :racc do
-  debug_option = '--debug' if ENV['RACC_DEBUG']
-  sh "racc #{debug_option} -l -o lib/opal/parser/grammar.rb lib/opal/parser/grammar.y"
-end
-
 desc 'Remove any generated file.'
 task :clobber do
   rm_r './build'