Class: Range

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# File 'opal/opal/corelib/range.rb', line 10
def initialize(first, last, exclude = false)
 ::Kernel .raise  ::NameError , "'initialize' called twice" if @begin
 ::Kernel .raise  ::ArgumentError , 'bad value for range' unless first <=> last || first.nil? || last.nil?
 @begin = first
 @end = last
 @excl = exclude
end

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# File 'opal/opal/corelib/range.rb', line 8
def begin
 @begin
end

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# File 'opal/opal/corelib/range.rb', line 8
def end
 @end
end

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# File 'opal/opal/corelib/range.rb', line 259
def %(n)
 if @begin.is_a?(Numeric ) && @end.is_a?(Numeric )
 ::Enumerator ::ArithmeticSequence.new(self, n, :%)
 else
 step(n)
 end
end

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# File 'opal/opal/corelib/range.rb', line 19
def ===(value)
 include? value
end

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# File 'opal/opal/corelib/marshal/write_buffer.rb', line 150
def __marshal__(buffer)
 buffer.save_link(self)
 buffer.write_extends(self)
 buffer.append('o')
 buffer.append_symbol(self.class.name)
 buffer.write_fixnum(3)
 buffer.append_symbol('excl')
 buffer.write(exclude_end?)
 buffer.append_symbol('begin')
 buffer.write(self.begin)
 buffer.append_symbol('end')
 buffer.write(self.end)
end

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# File 'opal/opal/corelib/range.rb', line 267
def bsearch(&block)
 return enum_for(:bsearch) unless block_given?
 if `is_infinite(self) && (self.begin.$$is_number || self.end.$$is_number)`
 ::Kernel .raise  ::NotImplementedError , "Can't #bsearch an infinite range"
 end
 unless `self.begin.$$is_number && self.end.$$is_number`
 ::Kernel .raise  ::TypeError , "can't do binary search for #{@begin.class}"
 end
 to_a.bsearch(&block)
end

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# File 'opal/opal/corelib/range.rb', line 32
def count(&block)
 if !block_given? && `is_infinite(self)`
 return ::Float ::INFINITY
 end
 super
end

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# File 'opal/opal/corelib/range.rb', line 44
def cover?(value)
 beg_cmp = (@begin.nil? && -1) || (@begin <=> value) || false
 end_cmp = (@end.nil? && -1) || (value <=> @end) || false
 if @excl
 end_cmp && end_cmp < 0
 else
 end_cmp && end_cmp <= 0
 end && beg_cmp && beg_cmp <= 0
end

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# File 'opal/opal/corelib/range.rb', line 54
def each(&block)
 return enum_for(:each) { size } unless block_given?
 %x{
 var i, limit;
 if (#{@begin}.$$is_number && #{@end}.$$is_number) {
 if (#{@begin} % 1 !== 0 || #{@end} % 1 !== 0) {
 #{::Kernel .raise  ::TypeError , "can't iterate from Float"}
 }
 for (i = #{@begin}, limit = #{@end} + #{@excl ? 0 : 1}; i < limit; i++) {
 block(i);
 }
 return self;
 }
 if (#{@begin}.$$is_string && #{@end}.$$is_string) {
 #{@begin.upto(@end, @excl, &block)}
 return self;
 }
 }
 current = @begin
 last = @end
 unless current.respond_to?(:succ)
 ::Kernel .raise  ::TypeError , "can't iterate from #{current.class}"
 end
 while @end.nil? || (current <=> last) < 0
 yield current
 current = current.succ
 end
 yield current if !@excl && current == last
 self
end

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# File 'opal/opal/corelib/range.rb', line 96
def eql?(other)
 return false unless ::Range  === other
 @excl === other.exclude_end? &&
 @begin.eql?(other.begin) &&
 @end.eql?(other.end)
end

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# File 'opal/opal/corelib/range.rb', line 104
def exclude_end?
 @excl
end

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# File 'opal/opal/corelib/range.rb', line 108
def first(n = undefined)
 ::Kernel .raise  ::RangeError , 'cannot get the minimum of beginless range' if @begin.nil?
 return @begin if `n == null`
 super
end

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# File 'opal/opal/corelib/range.rb', line 295
def hash
 [@begin, @end, @excl].hash
end

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# File 'opal/opal/corelib/range.rb', line 285
def inspect
 "#{@begin && @begin.inspect}#{@excl ? '...' : '..'}#{@end && @end.inspect}"
end

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# File 'opal/opal/corelib/range.rb', line 114
def last(n = undefined)
 ::Kernel .raise  ::RangeError , 'cannot get the maximum of endless range' if @end.nil?
 return @end if `n == null`
 to_a.last(n)
end

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# File 'opal/opal/corelib/range.rb', line 289
def marshal_load(args)
 @begin = args[:begin]
 @end = args[:end]
 @excl = args[:excl]
end

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# File 'opal/opal/corelib/range.rb', line 121
def max
 if @end.nil?
 ::Kernel .raise  ::RangeError , 'cannot get the maximum of endless range'
 elsif block_given?
 super
 elsif !@begin.nil? && (@begin > @end ||
 @excl && @begin == @end)
 nil
 else
 `#{@excl} ? #{@end} - 1 : #{@end}`
 end
end

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# File 'opal/opal/corelib/range.rb', line 134
def min
 if @begin.nil?
 ::Kernel .raise  ::RangeError , 'cannot get the minimum of beginless range'
 elsif block_given?
 super
 elsif !@end.nil? && (@begin > @end ||
 @excl && @begin == @end)
 nil
 else
 @begin
 end
end

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# File 'opal/opal/corelib/range.rb', line 147
def size
 infinity = ::Float ::INFINITY
 return 0 if (@begin == infinity && !@end.nil?) || (@end == -infinity && !@begin.nil?)
 return infinity if `is_infinite(self)`
 return nil unless ::Numeric  === @begin && ::Numeric  === @end
 range_begin = @begin
 range_end = @end
 range_end -= 1 if @excl
 return 0 if range_end < range_begin
 `Math.abs(range_end - range_begin) + 1`.to_i
end

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# File 'opal/opal/corelib/range.rb', line 163
def step(n = undefined)
 %x{
 function coerceStepSize() {
 if (n == null) {
 n = 1;
 }
 else if (!n.$$is_number) {
 n = #{::Opal .coerce_to! (n, ::Integer , :to_int)}
 }
 if (n < 0) {
 #{::Kernel .raise  ::ArgumentError , "step can't be negative"}
 } else if (n === 0) {
 #{::Kernel .raise  ::ArgumentError , "step can't be 0"}
 }
 }
 function enumeratorSize() {
 if (!#{@begin.respond_to?(:succ)}) {
 return nil;
 }
 if (#{@begin}.$$is_string && #{@end}.$$is_string) {
 return nil;
 }
 if (n % 1 === 0) {
 return #{(size / n).ceil};
 } else {
 // n is a float
 var begin = self.begin, end = self.end,
 abs = Math.abs, floor = Math.floor,
 err = (abs(begin) + abs(end) + abs(end - begin)) / abs(n) * #{::Float ::EPSILON},
 size;
 if (err > 0.5) {
 err = 0.5;
 }
 if (self.excl) {
 size = floor((end - begin) / n - err);
 if (size * n + begin < end) {
 size++;
 }
 } else {
 size = floor((end - begin) / n + err) + 1
 }
 return size;
 }
 }
 }
 unless block_given?
 if (@begin.is_a?(Numeric ) || @begin.nil?) &&
 (@end.is_a?(Numeric ) || @end.nil?) &&
 !(@begin.nil? && @end.nil?)
 return ::Enumerator ::ArithmeticSequence.new(self, n, :step)
 else
 return enum_for(:step, n) do
 %x{
 coerceStepSize();
 return enumeratorSize();
 }
 end
 end
 end
 `coerceStepSize()`
 if `self.begin.$$is_number && self.end.$$is_number`
 i = 0
 loop do
 current = @begin + i * n
 if @excl
 break if current >= @end
 elsif current > @end
 break
 end
 yield(current)
 i += 1
 end
 else
 %x{
 if (#{@begin}.$$is_string && #{@end}.$$is_string && n % 1 !== 0) {
 #{::Kernel .raise  ::TypeError , 'no implicit conversion to float from string'}
 }
 }
 each_with_index do |value, idx|
 yield(value) if idx % n == 0
 end
 end
 self
end

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# File 'opal/opal/corelib/range.rb', line 39
def to_a
 ::Kernel .raise  ::TypeError , 'cannot convert endless range to an array' if `is_infinite(self)`
 super
end

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# File 'opal/opal/corelib/range.rb', line 281
def to_s 
 "#{@begin || ''}#{@excl ? '...' : '..'}#{@end || ''}"
end