Class: KiCad::AST::Node

Inherits:
Object
  • Object
show all
Defined in:
lib/kicad/ast.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(values, children) ⇒ Node

Returns a new instance of Node.



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# File 'lib/kicad/ast.rb', line 6

def initialize values, children
  @values = values
  @children = children
end

Instance Attribute Details

#children ⇒ Object (readonly)

Returns the value of attribute children.



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# File 'lib/kicad/ast.rb', line 4

def children
  @children
end

#values ⇒ Object (readonly)

Returns the value of attribute values.



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# File 'lib/kicad/ast.rb', line 4

def values
  @values
end

Class Method Details

.child_types(*cts) ⇒ Object

Define methods for each child type this class allows



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# File 'lib/kicad/ast.rb', line 47

def self.child_types *cts
  # puts "#{self.name} allows child types #{cts.inspect}"
  cts.each do |c|
    if Array === c
      define_method(:"all_#{c[0].to_s}") do
        # puts "Looking for all [#{class_names*', '}] in #{@children.map{|q| q.class.name}.inspect}"
        children_of_type(c)
      end
      # REVISIT: Allow deleting and adding instances to the array
      # new_child = KiCad.parse('(some new node)').value
      # @children.append(new_child)
    else
      class_name = 'KiCad::AST::'+to_class_name(c)
      define_method(:"#{c}") do
        # puts "Looking for first #{class_name} in #{@children.map{|q| q.class.name}.inspect}"
        a = children_of_type(c)
        puts "Choosing first #{self.class.name}.#{c} of #{a.size}" if a.size > 1
        a.first
      end
      # Allow deleting this instance
      define_method(:"unset_#{c.to_s}") do
        child = send(:"#{c}")
        @children = @children - [child] if child
        child ? true : nil
      end
    end
  end
end

.to_class_name(sym) ⇒ Object 



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# File 'lib/kicad/ast.rb', line 76

def self.to_class_name sym
  sym.to_s.gsub(/\A[a-z]|_[a-z]/) {|from| from[-1].upcase }
end

.to_symbol(class_name) ⇒ Object 



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# File 'lib/kicad/ast.rb', line 80

def self.to_symbol class_name
  class_name.to_s.gsub(/[A-Z]/) {|from| '_'+from[-1].downcase }.sub(/\A_/,'')
end

.value_types(vts) ⇒ Object

Define setter and getter methods for each value type this class allows



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# File 'lib/kicad/ast.rb', line 20

def self.value_types vts
  i = 1   # @values[0] is always the class symbol
  vts.each do |k, v|
    # puts "#{self.name} attribute #{k.to_s} => #{v.inspect}"
    # puts "attr_accessor #{self.name}.#{k} (values #{v.inspect}) is stored in @values[#{i}]"
    begin
      o = i # Avoid capturing i after the loop ends
      define_method(:"#{k}") do
        # puts "accessing #{self.class.name}.#{k} as @values[#{o}]"
        @values[o]
      end
      define_method(:"#{k}=") do |v|
        # puts "setting #{self.class.name}.#{k} as @values[#{o}]"
        # REVISIT: Check valid data type matching v
        @values[o] = v
      end
    end
    i = i+1
  end
end

Instance Method Details

#children_of_type(*cts) ⇒ Object

cts is an array of AST class symbols or strings



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# File 'lib/kicad/ast.rb', line 41

def children_of_type *cts  # cts is an array of AST class symbols or strings
  class_names = cts.flatten.map{|k| 'KiCad::AST::'+self.class.to_class_name(k)}
  @children.filter{|h| class_names.include?(h.class.name) }
end

#emit(depth = 0) ⇒ Object 



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# File 'lib/kicad/ast.rb', line 11

def emit depth = 0
  "\t"*depth +
  '(' +
  @values.map{|v| String === v ? v.inspect : v.to_s }*' ' +
  (@children.size == 0 ? '' : "\n" + @children.map{|c| c.emit(depth+1) }*''+"\t"*depth) +
  ")\n"
end