Class: Struct

Inherits:
Object
  • Object
show all
Includes:
Enumerable
Defined in:
opal/opal/rspec/fixes/opal/corelib/struct.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(*args) ⇒ Struct

Returns a new instance of Struct.



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# File 'opal/opal/rspec/fixes/opal/corelib/struct.rb', line 80

def initialize(*args)
  members.each_with_index { |name, index|
    self[name] = args[index]
  }
end

Class Method Details

.define_struct_attribute(name) ⇒ Object 



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# File 'opal/opal/rspec/fixes/opal/corelib/struct.rb', line 48

def self.define_struct_attribute(name)
  if self == Struct
    raise ArgumentError, 'you cannot define attributes to the Struct class'
  end

  members << name

  define_method name do
    self[name]
  end

  define_method "#{name}=" do |value|
    self[name] = value
  end
end

.inherited(klass) ⇒ Object 



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# File 'opal/opal/rspec/fixes/opal/corelib/struct.rb', line 72

def self.inherited(klass)
  members = @members

  klass.instance_eval {
    @members = members
  }
end

.members ⇒ Object 



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# File 'opal/opal/rspec/fixes/opal/corelib/struct.rb', line 64

def self.members
  if self == Struct
    raise ArgumentError, 'the Struct class has no members'
  end

  @members ||= []
end

.new(name = undefined, *args, &block) ⇒ Object 



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# File 'opal/opal/rspec/fixes/opal/corelib/struct.rb', line 21

def self.new(name = undefined, *args, &block)
  return super unless self == Struct

  if name[0] == name[0].upcase
    Struct.const_set(name, new(*args))
  else
    args.unshift name

    Class.new(self) {
      args.each { |arg| define_struct_attribute arg }

      instance_eval(&block) if block

      class << self
        def new(*args)
          instance = allocate
          `#{instance}.$$data = {};`
          instance.initialize(*args)
          instance
        end

        alias [] new
      end
    }
  end
end

Instance Method Details

#==(other) ⇒ Object 



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# File 'opal/opal/rspec/fixes/opal/corelib/struct.rb', line 122

def ==(other)
  return false unless other.instance_of?(self.class)

  %x{
      var recursed1 = {}, recursed2 = {};

      function _eqeq(struct, other) {
        var key, a, b;

        recursed1[#{`struct`.__id__}] = true;
        recursed2[#{`other`.__id__}] = true;

        for (key in struct.$$data) {
          a = struct.$$data[key];
          b = other.$$data[key];

          if (#{Struct === `a`}) {
            if (!recursed1.hasOwnProperty(#{`a`.__id__}) || !recursed2.hasOwnProperty(#{`b`.__id__})) {
              if (!_eqeq(a, b)) {
                return false;
              }
            }
          } else {
            if (!#{`a` == `b`}) {
              return false;
            }
          }
        }

        return true;
      }

      return _eqeq(self, other);
    }
end

#[](name) ⇒ Object 



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# File 'opal/opal/rspec/fixes/opal/corelib/struct.rb', line 90

def [](name)
  if Integer === name
    raise IndexError, "offset #{name} too small for struct(size:#{members.size})" if name < -members.size
    raise IndexError, "offset #{name} too large for struct(size:#{members.size})" if name >= members.size

    name = members[name]
  elsif String === name
    raise NameError, "no member '#{name}' in struct" unless members.include?(name.to_sym)
  else
    raise TypeError, "no implicit conversion of #{name.class} into Integer"
  end

  name = Opal.coerce_to!(name, String, :to_str)
  `self.$$data[name]`
end

#[]=(name, value) ⇒ Object 



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# File 'opal/opal/rspec/fixes/opal/corelib/struct.rb', line 106

def []=(name, value)
  if Integer === name
    raise IndexError, "offset #{name} too small for struct(size:#{members.size})" if name < -members.size
    raise IndexError, "offset #{name} too large for struct(size:#{members.size})" if name >= members.size

    name = members[name]
  elsif String === name
    raise NameError, "no member '#{name}' in struct" unless members.include?(name.to_sym)
  else
    raise TypeError, "no implicit conversion of #{name.class} into Integer"
  end

  name = Opal.coerce_to!(name, String, :to_str)
  `self.$$data[name] = value`
end

#each ⇒ Object 



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# File 'opal/opal/rspec/fixes/opal/corelib/struct.rb', line 198

def each
  return enum_for(:each) { self.size } unless block_given?

  members.each { |name| yield self[name] }
  self
end

#each_pair ⇒ Object 



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# File 'opal/opal/rspec/fixes/opal/corelib/struct.rb', line 205

def each_pair
  return enum_for(:each_pair) { self.size } unless block_given?

  members.each { |name| yield [name, self[name]] }
  self
end

#eql?(other) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'opal/opal/rspec/fixes/opal/corelib/struct.rb', line 162

def eql?(other)
  return false unless other.instance_of?(self.class)

  %x{
      var recursed1 = {}, recursed2 = {};

      function _eqeq(struct, other) {
        var key, a, b;

        recursed1[#{`struct`.__id__}] = true;
        recursed2[#{`other`.__id__}] = true;

        for (key in struct.$$data) {
          a = struct.$$data[key];
          b = other.$$data[key];

          if (#{Struct === `a`}) {
            if (!recursed1.hasOwnProperty(#{`a`.__id__}) || !recursed2.hasOwnProperty(#{`b`.__id__})) {
              if (!_eqeq(a, b)) {
                return false;
              }
            }
          } else {
            if (!#{`a`.eql?(`b`)}) {
              return false;
            }
          }
        }

        return true;
      }

      return _eqeq(self, other);
    }
end

#hash ⇒ Object 



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# File 'opal/opal/rspec/fixes/opal/corelib/struct.rb', line 158

def hash
  Hash.new(`self.$$data`).hash
end

#inspect ⇒ Object Also known as: to_s 



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# File 'opal/opal/rspec/fixes/opal/corelib/struct.rb', line 224

def inspect
  result = "#<struct "

  if self.class == Struct
    result += "#{self.class} "
  end

  result += each_pair.map { |name, value|
    "#{name}=#{value.inspect}"
  }.join ", "

  result += ">"

  result
end

#length ⇒ Object Also known as: size 



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# File 'opal/opal/rspec/fixes/opal/corelib/struct.rb', line 212

def length
  members.length
end

#members ⇒ Object 



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# File 'opal/opal/rspec/fixes/opal/corelib/struct.rb', line 86

def members
  self.class.members
end

#to_a ⇒ Object Also known as: values 



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# File 'opal/opal/rspec/fixes/opal/corelib/struct.rb', line 218

def to_a
  members.map { |name| self[name] }
end

#to_h ⇒ Object 



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# File 'opal/opal/rspec/fixes/opal/corelib/struct.rb', line 242

def to_h
  members.inject({}) { |h, name| h[name] = self[name]; h }
end

#values_at(*args) ⇒ Object 



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# File 'opal/opal/rspec/fixes/opal/corelib/struct.rb', line 246

def values_at(*args)
  args = args.map { |arg| `arg.$$is_range ? #{arg.to_a} : arg` }.flatten
  %x{
      var result = [];
      for (var i = 0, len = args.length; i < len; i++) {
        if (!args[i].$$is_number) {
          #{raise TypeError, "no implicit conversion of #{`args[i]`.class} into Integer"}
        }
        result.push(#{self[`args[i]`]});
      }
      return result;
    }
end