Class: Struct

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# File 'opal/opal/corelib/struct.rb', line 77
def initialize(*args)
 if `#{self.class}.$$keyword_init`
 kwargs = args.last || {}
 if args.length > 1 || `(args.length === 1 && !kwargs.$$is_hash)`
 raise ArgumentError , "wrong number of arguments (given #{args.length}, expected 0)"
 end
 extra = kwargs.keys - self.class.members
 if extra.any?
 raise ArgumentError , "unknown keywords: #{extra.join(', ')}"
 end
 self.class.members.each do |name|
 self[name] = kwargs[name]
 end
 else
 if args.length > self.class.members.length
 raise ArgumentError , 'struct size differs'
 end
 self.class.members.each_with_index do |name, index|
 self[name] = args[index]
 end
 end
end

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# File 'opal/opal/corelib/struct.rb', line 45
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.$$data[name]`
 end
 define_method "#{name}=" do |value|
 `self.$$data[name] = value`
 end
end

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# File 'opal/opal/corelib/struct.rb', line 69
def self.inherited(klass)
 members = @members
 klass.instance_eval do
 @members = members
 end
end

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# File 'opal/opal/corelib/struct.rb', line 61
def self.members
 if self == Struct 
 raise ArgumentError , 'the Struct class has no members'
 end
 @members ||= []
end

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# File 'opal/opal/corelib/struct.rb', line 6
def self.new(const_name, *args, keyword_init: false, &block)
 if const_name
 begin
 const_name = Opal .const_name! (const_name)
 rescue TypeError , NameError 
 args.unshift(const_name)
 const_name = nil
 end
 end
 args.map do |arg|
 Opal .coerce_to! (arg, String , :to_str)
 end
 klass = Class .new (self) do
 args.each { |arg| define_struct_attribute(arg) }
 class << self
 def new(*args)
 instance = allocate
 `#{instance}.$$data = {}`
 instance.initialize(*args)
 instance
 end
 alias_method :[], :new
 end
 end
 klass.module_eval(&block) if block
 `klass.$$keyword_init = keyword_init`
 if const_name
 Struct .const_set(const_name, klass)
 end
 klass
end

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# File 'opal/opal/corelib/struct.rb', line 159
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

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# File 'opal/opal/corelib/struct.rb', line 123
def [](name)
 if Integer  === name
 raise IndexError , "offset #{name} too small for struct(size:#{self.class.members.size})" if name < -self.class.members.size
 raise IndexError , "offset #{name} too large for struct(size:#{self.class.members.size})" if name >= self.class.members.size
 name = self.class.members[name]
 elsif String  === name
 %x{
 if(!self.$$data.hasOwnProperty(name)) {
 #{raise NameError .new ("no member '#{name}' in struct", name)}
 }
 }
 else
 raise TypeError , "no implicit conversion of #{name.class} into Integer"
 end
 name = Opal .coerce_to! (name, String , :to_str)
 `self.$$data[name]`
end

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# File 'opal/opal/corelib/struct.rb', line 143
def []=(name, value)
 if Integer  === name
 raise IndexError , "offset #{name} too small for struct(size:#{self.class.members.size})" if name < -self.class.members.size
 raise IndexError , "offset #{name} too large for struct(size:#{self.class.members.size})" if name >= self.class.members.size
 name = self.class.members[name]
 elsif String  === name
 raise NameError .new ("no member '#{name}' in struct", name) unless self.class.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

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# File 'opal/opal/corelib/marshal/write_buffer.rb', line 166
def __marshal__(buffer)
 buffer.save_link(self)
 buffer.write_ivars_prefix(self)
 buffer.write_extends(self)
 buffer.append('S')
 buffer.append_symbol(self.class.name)
 buffer.write_fixnum(length)
 each_pair do |attr_name, value|
 buffer.append_symbol(attr_name)
 buffer.write(value)
 end
 buffer.write_ivars_suffix(self)
end

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# File 'opal/opal/corelib/pattern_matching.rb', line 140
def deconstruct_keys(keys)
 return to_h if keys.nil?
 raise TypeError , 'expected Array or nil' unless Array  === keys
 return {} if keys.length > values.length
 out = {}
 keys.each do |key|
 should_break = case key
 when Integer 
 values.length < key
 when Symbol  # Or String? Doesn't matter, we're in Opal.
 !members.include?(key)
 end
 break if should_break
 out[key] = self[key]
 end
 out
end

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# File 'opal/opal/corelib/struct.rb', line 295
def dig(key, *keys)
 item = if `key.$$is_string && self.$$data.hasOwnProperty(key)`
 `self.$$data[key] || nil`
 end
 %x{
 if (item === nil || keys.length === 0) {
 return item;
 }
 }
 unless item.respond_to?(:dig)
 raise TypeError , "#{item.class} does not have #dig method"
 end
 item.dig(*keys)
end

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# File 'opal/opal/corelib/struct.rb', line 231
def each
 return enum_for(:each) { size } unless block_given?
 self.class.members.each { |name| yield self[name] }
 self
end

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# File 'opal/opal/corelib/struct.rb', line 238
def each_pair
 return enum_for(:each_pair) { size } unless block_given?
 self.class.members.each { |name| yield [name, self[name]] }
 self
end

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# File 'opal/opal/corelib/struct.rb', line 195
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

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# File 'opal/opal/corelib/struct.rb', line 119
def hash
 Hash .new (`self.$$data`).hash 
end

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# File 'opal/opal/corelib/struct.rb', line 104
def initialize_copy(from)
 %x{
 self.$$data = {}
 var keys = Object.keys(from.$$data), i, max, name;
 for (i = 0, max = keys.length; i < max; i++) {
 name = keys[i];
 self.$$data[name] = from.$$data[name];
 }
 }
end

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# File 'opal/opal/corelib/struct.rb', line 257
def inspect
 result = '#<struct '
 if Struct  === self && self.class.name
 result += "#{self.class}"
 end
 result += each_pair.map do |name, value|
 "#{name}=#{value.inspect}"
 end.join ', '
 result += '>'
 result
end

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# File 'opal/opal/corelib/struct.rb', line 245
def length
 self.class.members.length
end

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# File 'opal/opal/corelib/struct.rb', line 115
def members
 self.class.members
end

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# File 'opal/opal/corelib/struct.rb', line 251
def to_a
 self.class.members.map { |name| self[name] }
end

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# File 'opal/opal/corelib/struct.rb', line 275
def to_h(&block)
 return map(&block).to_h(*args) if block_given?
 self.class.members.each_with_object({}) { |name, h| h[name] = self[name] }
end

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# File 'opal/opal/corelib/struct.rb', line 281
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