Class: Struct
- Inherits:
-
Object
show all
- Includes:
- Enumerable
- Defined in:
- opal/opal/corelib/struct.rb,
opal/opal/corelib/marshal/write_buffer.rb
Class Method Summary
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Instance Method Summary
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Methods included from Enumerable
#all?, #any?, #chunk, #chunk_while, #collect, #collect_concat, #count, #cycle, #detect, #drop, #drop_while, #each_cons, #each_entry, #each_slice, #each_with_index, #each_with_object, #entries, #enumerator_size, #find_all, #find_index, #first, #grep, #grep_v, #group_by, #include?, #inject, #lazy, #max, #max_by, #min, #min_by, #minmax, #minmax_by, #none?, #one?, #partition, #reject, #reverse_each, #slice_after, #slice_before, #slice_when, #sort, #sort_by, #sum, #take, #take_while, #uniq, #zip
Constructor Details
#initialize(*args) ⇒ Struct
Returns a new instance of 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
= kwargs.keys - self.class.members
if .any?
raise ArgumentError, "unknown keywords: #{.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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Class Method Details
.define_struct_attribute(name) ⇒ Object
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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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.inherited(klass) ⇒ Object
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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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.new(const_name, *args, keyword_init: false, &block) ⇒ Object
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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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Instance Method Details
#==(other) ⇒ Object
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# File 'opal/opal/corelib/struct.rb', line 148
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.$$data[key];
if (#{Struct === `a`}) {
if (!recursed1.hasOwnProperty(#{`a`.__id__}) || !recursed2.hasOwnProperty(#{`b`.__id__})) {
if (!_eqeq(a, b)) {
return false;
}
}
} else {
if (!#{`a` == `b`}) {
return false;
}
}
}
return true;
}
return _eqeq(self, other);
}
end
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# File 'opal/opal/corelib/struct.rb', line 112
def [](name)
if Integer === name
raise IndexError, "offset #{name} too small for struct(size:#{self.class.members.size})" if name < -self.class.members.size
raise IndexError, "offset #{name} too large for struct(size:#{self.class.members.size})" if name >= self.class.members.size
name = self.class.members[name]
elsif String === name
%x{
if(!self.$$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.$$data[name]`
end
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#[]=(name, value) ⇒ Object
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# File 'opal/opal/corelib/struct.rb', line 132
def []=(name, value)
if Integer === name
raise IndexError, "offset #{name} too small for struct(size:#{self.class.members.size})" if name < -self.class.members.size
raise IndexError, "offset #{name} too large for struct(size:#{self.class.members.size})" if name >= self.class.members.size
name = self.class.members[name]
elsif String === name
raise NameError.new("no member '#{name}' in struct", name) unless self.class.members.include?(name.to_sym)
else
raise TypeError, "no implicit conversion of #{name.class} into Integer"
end
name = Opal.coerce_to!(name, String, :to_str)
`self.$$data[name] = value`
end
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#__marshal__(buffer) ⇒ Object
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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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#dig(key, *keys) ⇒ Object
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# File 'opal/opal/corelib/struct.rb', line 282
def dig(key, *keys)
item = if `key.$$is_string && self.$$data.hasOwnProperty(key)`
`self.$$data[key] || nil`
end
%x{
if (item === nil || keys.length === 0) {
return item;
}
}
unless item.respond_to?(:dig)
raise TypeError, "#{item.class} does not have #dig method"
end
item.dig(*keys)
end
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# File 'opal/opal/corelib/struct.rb', line 220
def each
return enum_for(:each) { size } unless block_given?
self.class.members.each { |name| yield self[name] }
self
end
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#each_pair ⇒ Object
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# File 'opal/opal/corelib/struct.rb', line 227
def each_pair
return enum_for(:each_pair) { size } unless block_given?
self.class.members.each { |name| yield [name, self[name]] }
self
end
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#eql?(other) ⇒ Boolean
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# File 'opal/opal/corelib/struct.rb', line 184
def eql?(other)
return false unless other.instance_of?(self.class)
%x{
var recursed1 = {}, recursed2 = {};
function _eqeq(struct, other) {
var key, a, b;
recursed1[#{`struct`.__id__}] = true;
recursed2[#{`other`.__id__}] = true;
for (key in struct.$$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 108
def hash
Hash.new(`self.$$data`).hash
end
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#inspect ⇒ Object
Also known as:
to_s
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# File 'opal/opal/corelib/struct.rb', line 246
def inspect
result = '#<struct '
if Struct === self && self.class.name
result += "#{self.class} "
end
result += each_pair.map do |name, value|
"#{name}=#{value.inspect}"
end.join ', '
result += '>'
result
end
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#length ⇒ Object
Also known as:
size
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# File 'opal/opal/corelib/struct.rb', line 234
def length
self.class.members.length
end
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# File 'opal/opal/corelib/struct.rb', line 104
def members
self.class.members
end
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#to_a ⇒ Object
Also known as:
values
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# File 'opal/opal/corelib/struct.rb', line 240
def to_a
self.class.members.map { |name| self[name] }
end
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# File 'opal/opal/corelib/struct.rb', line 264
def to_h
self.class.members.each_with_object({}) { |name, h| h[name] = self[name] }
end
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#values_at(*args) ⇒ Object
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# File 'opal/opal/corelib/struct.rb', line 268
def values_at(*args)
args = args.map { |arg| `arg.$$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
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