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Versions: 12
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Stored size: 1.57 KB
Contents
require_relative 'cli_options'
require_relative 'json_parser'
require_relative 'json_minifier'
require_relative 'json_ast_builder'
prog_name = 'json_demo'
prog_version = '0.3.0'
cli_options = CLIOptions.new(prog_name, prog_version, ARGV)
if ARGV.empty?
puts 'Missing input file name.'
puts 'Use -h option for command-line help.'
exit(1)
end
file_name = ARGV[0]
# Create a JSON parser object
parser = JSONParser.new
result = parser.parse_file(file_name) # result object contains parse details
unless result.success?
# Stop if parse failed...
puts "Parsing of '#{file_name}' failed"
puts result.failure_reason.message
exit(1)
end
tree_rep = cli_options[:rep]
renderer = nil
# Select the output format
case cli_options[:format]
when :ascii_tree
renderer = Rley::Formatter::Asciitree.new($stdout)
when :labelled
renderer = Rley::Formatter::BracketNotation.new($stdout)
when :minify
msg = "minify format works for 'cst' representation only"
raise StandardError, msg if tree_rep == :ast
renderer = JSONMinifier.new($stdout)
when :ruby
msg = "ruby format works for 'ast' representation only"
raise StandardError, msg if tree_rep == :cst
end
tree_builder = tree_rep == :ast ? JSONASTBuilder : nil
# Generate a parse tree from the parse result
ptree = result.parse_tree(tree_builder)
if renderer
# Let's create a parse tree visitor
visitor = Rley::ParseTreeVisitor.new(ptree)
# Now output formatted parse tree
renderer.render(visitor)
else
root = ptree.root
p(root.to_ruby) # Output the Ruby representation of the JSON input
end
# End of file
Version data entries
12 entries across 12 versions & 1 rubygems