Class: Racc::ISet

Inherits:
Object show all
Defined in:
lib/racc/iset.rb

Overview

An “indexed” set. All items must respond to :ident.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(a = []) ⇒ ISet

Returns a new instance of ISet.


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# File 'lib/racc/iset.rb', line 17

def initialize(a = [])
  @set = a
end

Instance Attribute Details

#setObject (readonly)

Returns the value of attribute set


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# File 'lib/racc/iset.rb', line 21

def set
  @set
end

Instance Method Details

#[](key) ⇒ Object Also known as: include?, key?


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# File 'lib/racc/iset.rb', line 27

def [](key)
  @set[key.ident]
end

#[]=(key, val) ⇒ Object


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# File 'lib/racc/iset.rb', line 31

def []=(key, val)
  @set[key.ident] = val
end

#add(i) ⇒ Object


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# File 'lib/racc/iset.rb', line 23

def add(i)
  @set[i.ident] = i
end

#clearObject


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# File 'lib/racc/iset.rb', line 81

def clear
  @set.clear
end

#delete(key) ⇒ Object


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# File 'lib/racc/iset.rb', line 53

def delete(key)
  i = @set[key.ident]
  @set[key.ident] = nil
  i
end

#dupObject


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# File 'lib/racc/iset.rb', line 85

def dup
  ISet.new(@set.dup)
end

#each(&block) ⇒ Object


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# File 'lib/racc/iset.rb', line 59

def each(&block)
  @set.compact.each(&block)
end

#empty?Boolean

Returns:

  • (Boolean)

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# File 'lib/racc/iset.rb', line 77

def empty?
  @set.nitems == 0
end

#sizeObject


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# File 'lib/racc/iset.rb', line 73

def size
  @set.nitems
end

#to_aObject


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# File 'lib/racc/iset.rb', line 63

def to_a
  @set.compact
end

#to_sObject Also known as: inspect


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# File 'lib/racc/iset.rb', line 67

def to_s
  "[#{@set.compact.join(' ')}]"
end

#update(other) ⇒ Object


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# File 'lib/racc/iset.rb', line 38

def update(other)
  s = @set
  o = other.set
  o.each_index do |idx|
    if t = o[idx]
      s[idx] = t
    end
  end
end

#update_a(a) ⇒ Object


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# File 'lib/racc/iset.rb', line 48

def update_a(a)
  s = @set
  a.each {|i| s[i.ident] = i }
end