Class: Malady::AST::IfNode

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

Instance Attribute Summary collapse

Attributes inherited from Node

#filename, #line

Instance Method Summary collapse

Methods inherited from Node

#pos

Constructor Details

#initialize(filename, line, condition, then_branch, else_branch) ⇒ IfNode

Returns a new instance of IfNode.



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# File 'lib/malady/ast.rb', line 145

def initialize(filename, line, condition, then_branch, else_branch)
  super
  @condition = condition
  @then_branch = then_branch
  @else_branch = else_branch
end

Instance Attribute Details

#condition ⇒ Object (readonly)

Returns the value of attribute condition.



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# File 'lib/malady/ast.rb', line 144

def condition
  @condition
end

#else_branch ⇒ Object (readonly)

Returns the value of attribute else_branch.



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# File 'lib/malady/ast.rb', line 144

def else_branch
  @else_branch
end

#then_branch ⇒ Object (readonly)

Returns the value of attribute then_branch.



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# File 'lib/malady/ast.rb', line 144

def then_branch
  @then_branch
end

Instance Method Details

#bytecode(g) ⇒ Object 



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# File 'lib/malady/ast.rb', line 152

def bytecode(g)
  pos(g)

  end_label = g.new_label
  else_label = g.new_label

  condition.bytecode(g)
  g.goto_if_false else_label
  then_branch.bytecode(g)
  g.goto end_label

  else_label.set!
  else_branch.bytecode(g)

  end_label.set!
end