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require 'spec_helper'
BENCHMARK = false
METAGRAMMAR_PATH = ([ File.expand_path('../../../lib/treetop/compiler/metagrammar.treetop', __FILE__) ] +
$:.map { |d| d + '/treetop/compiler/metagrammar.treetop' }).select { |f| File::exist?(f) }.first
module CircularCompilationSpec
describe "a parser for the metagrammar" do
attr_reader :parser
before do
@parser = Treetop::Compiler::MetagrammarParser.new
end
it "can parse the metagrammar.treetop whence it was generated" do
File.open(METAGRAMMAR_PATH, 'r') do |f|
metagrammar_source = f.read
result = parser.parse(metagrammar_source)
result.should_not be_nil
# generated_parser = result.compile
# Object.class_eval(generated_parser)
# parser_2 = Treetop::Compiler::MetagrammarParser.new
# optionally_benchmark do
# result = parser_2.parse(metagrammar_source)
# result.should_not be_nil
# end
end
end
end
end
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