First pass at PEG parser.

Gemfile

@@ -14,13 +14,13 @@ group :development do
   gem 'json-ld-preloaded',github: 'ruby-rdf/json-ld-preloaded',   branch: 'develop'
   gem 'ld-patch',         github: 'ruby-rdf/ld-patch',            branch: 'develop'
   gem 'linkeddata',       github: 'ruby-rdf/linkeddata',          branch: 'develop'
-  gem 'rdf-hamster-repo',   github: 'ruby-rdf/rdf-hamster-repo',    branch: 'develop'
+  gem 'rdf-hamster-repo', github: 'ruby-rdf/rdf-hamster-repo',    branch: 'develop'
   gem 'rdf-isomorphic',   github: 'ruby-rdf/rdf-isomorphic',      branch: 'develop'
   gem 'rdf-json',         github: 'ruby-rdf/rdf-json',            branch: 'develop'
   gem 'rdf-microdata',    github: 'ruby-rdf/rdf-microdata',       branch: 'develop'
   gem 'rdf-n3',           github: 'ruby-rdf/rdf-n3',              branch: 'develop'
   gem 'rdf-normalize',    github: 'ruby-rdf/rdf-normalize',       branch: 'develop'
-  gem 'rdf-ordered-repo',   github: 'ruby-rdf/rdf-ordered-repo',    branch: 'develop'
+  gem 'rdf-ordered-repo', github: 'ruby-rdf/rdf-ordered-repo',    branch: 'develop'
   gem 'rdf-rdfa',         github: 'ruby-rdf/rdf-rdfa',            branch: 'develop'
   gem 'rdf-rdfxml',       github: 'ruby-rdf/rdf-rdfxml',          branch: 'develop'
   gem 'rdf-reasoner',     github: 'ruby-rdf/rdf-reasoner',        branch: 'develop'
@@ -35,6 +35,8 @@ group :development do
   gem 'erubis',           '>= 2.7.0'
   gem 'htmlentities',     '>= 4.3.4'
   gem 'equivalent-xml',   '>= 0.6.0'
+  gem 'ostruct',          '>= 0.6.0'
+  gem 'ruby-prof',        platforms: :mri
 end
 
 group :debug do

Rakefile

@@ -73,32 +73,32 @@ file "etc/manifest-cache.nt" do
 end
 
 desc 'Create versions of ebnf files in etc'
-task etc: %w{etc/sparql12.sxp etc/sparql12.html etc/sparql12.ll1.sxp}
+task etc: %w{etc/sparql12.sxp etc/sparql12.html etc/sparql12.peg.sxp}
 
 desc 'Build first, follow and branch tables'
 task meta: "lib/sparql/grammar/meta.rb"
 
 file "lib/sparql/grammar/meta.rb" => "etc/sparql12.bnf" do |t|
   sh %{
-    ebnf --ll1 QueryUnit --ll1 UpdateUnit --format rb \
+    ebnf --peg --format rb \
       --mod-name SPARQL::Grammar::Meta \
       --output lib/sparql/grammar/meta.rb \
       etc/sparql12.bnf
   }
 end
 
-file "etc/sparql12.ll1.sxp" => "etc/sparql12.bnf" do |t|
+file "etc/sparql12.sxp" => "etc/sparql12.bnf" do |t|
   sh %{
-    ebnf --ll1 QueryUnit --ll1 UpdateUnit --format sxp \
-      --output etc/sparql12.ll1.sxp \
+    ebnf --bnf --format sxp \
+      --output etc/sparql12.sxp \
       etc/sparql12.bnf
   }
 end
 
-file "etc/sparql12.sxp" => "etc/sparql12.bnf" do |t|
+file "etc/sparql12.peg.sxp" => "etc/sparql12.bnf" do |t|
   sh %{
-    ebnf --bnf --format sxp \
-      --output etc/sparql12.sxp \
+    ebnf --peg --format sxp \
+      --output etc/sparql12.peg.sxp \
       etc/sparql12.bnf
   }
 end