Contents

module PAC
  module Runtimes
    class MustangRuntime
      class Context
        def initialize(source = "")
          source = source.encode("UTF-8") if source.respond_to?(:encode)

          @v8_context = ::Mustang::Context.new
          @v8_context.eval(source)
        end

        def include(mod)
          (mod.methods - Module.methods).each do |name|
            @v8_context[name] = mod.method(name)
          end
        end

        def call(properties, *args)
          unbox @v8_context.eval(properties).call(*args)
        rescue NoMethodError => e
          raise ProgramError, e.message
        end

        def unbox(value)
          case value
          when ::Mustang::V8::Array
            value.map { |v| unbox(v) }
          when ::Mustang::V8::Boolean
            value.to_bool
          when ::Mustang::V8::NullClass, ::Mustang::V8::UndefinedClass
            nil
          when ::Mustang::V8::Function
            nil
          when ::Mustang::V8::SyntaxError
            raise RuntimeError, value.message
          when ::Mustang::V8::Error
            raise ProgramError, value.message
          else
            value.respond_to?(:delegate) ? value.delegate : value
          end
        end
      end

      def name
        "Mustang (V8)"
      end

      def compile(source)
        Context.new(source)
      end

      def available?
        require "mustang"
        true
      rescue LoadError
        false
      end
    end
  end
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
pac-1.0.0	lib/pac/runtimes/mustang.rb