Class: CodeTools::AST::Case

Inherits:
Node
  • Object
show all
Defined in:
lib/rubinius/code/ast/control_flow.rb

Direct Known Subclasses

ReceiverCase

Instance Attribute Summary collapse

Attributes inherited from Node

#line

Instance Method Summary collapse

Methods inherited from Node

#ascii_graph, #attributes, #children, match_arguments?, match_send?, #new_block_generator, #new_generator, #node_name, #or_bytecode, #pos, #set_child, transform, #transform, transform_comment, transform_kind, transform_kind=, transform_name, #value_defined, #visit, #walk

Constructor Details

#initialize(line, whens, else_body) ⇒ Case

Returns a new instance of Case.



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# File 'lib/rubinius/code/ast/control_flow.rb', line 8

def initialize(line, whens, else_body)
  @line = line
  @whens = whens
  @else = else_body || NilLiteral.new(line)
end

Instance Attribute Details

#else ⇒ Object

Returns the value of attribute else.



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# File 'lib/rubinius/code/ast/control_flow.rb', line 6

def else
  @else
end

#whens ⇒ Object

Returns the value of attribute whens.



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# File 'lib/rubinius/code/ast/control_flow.rb', line 6

def whens
  @whens
end

Instance Method Details

#bytecode(g) ⇒ Object 



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# File 'lib/rubinius/code/ast/control_flow.rb', line 14

def bytecode(g)
  pos(g)

  done = g.new_label

  @whens.each do |w|
    w.bytecode(g, done)
  end

  @else.bytecode(g)

  # See command in if about why using line 0
  g.set_line 0

  done.set!
end

#defined(g) ⇒ Object 



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# File 'lib/rubinius/code/ast/control_flow.rb', line 31

def defined(g)
  g.push_literal "expression"
end

#receiver_sexp ⇒ Object 



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# File 'lib/rubinius/code/ast/control_flow.rb', line 35

def receiver_sexp
  nil
end

#to_sexp ⇒ Object 



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# File 'lib/rubinius/code/ast/control_flow.rb', line 39

def to_sexp
  else_sexp = @else.kind_of?(NilLiteral) ? nil : @else.to_sexp
  sexp = [:case, receiver_sexp]
  sexp += @whens.map { |x| x.to_sexp }
  sexp << else_sexp
  sexp
end