Class: Akaza::Ruby2ws::Transpiler

Inherits:
Object
  • Object
show all
Defined in:
lib/akaza/ruby2ws.rb

Instance Method Summary collapse

Constructor Details

#initialize(ruby_code, path:) ⇒ Transpiler

Returns a new instance of Transpiler.

Parameters:

  • ruby_code (String)
  • path (String) —

    For debug information



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# File 'lib/akaza/ruby2ws.rb', line 154

def initialize(ruby_code, path:)
  @ruby_code = ruby_code
  @path = path

  @variable_addr_index = 2
  @variable_addrs = {}

  @label_index = 0
  @labels = {}

  # Method list to compile
  # Array<Array<Command>>
  @methods = []

  # For lazy compiling method.
  # MethodDefinition is inserted to it on :DEFN node.
  # The definition is compiled on call node, such as :CALL.
  # Hash{Symbol => Array<MethodDefinition>}
  @method_definitions = {}

  @method_table = {
    Array: [:size, :push, :pop, :[], :[]=],
    Integer: [:<=>],
    Hash: [:[], :[]=],
  }

  @lvars_stack = []

  @current_class = nil
end

Instance Method Details

#transpile ⇒ Object 



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# File 'lib/akaza/ruby2ws.rb', line 185

def transpile
  commands = []
  # define built-in functions
  define_array_size
  define_array_pop
  define_array_push
  define_array_ref
  define_array_attr_asgn
  define_hash_ref
  define_hash_attr_asgn
  define_op_spaceship

  # Prelude
  commands.concat compile_expr(PRELUDE_AST)

  ast = RubyVM::AbstractSyntaxTree.parse(@ruby_code)
  body = compile_expr(ast)

  # Save self for top level
  commands << [:stack_push, variable_name_to_addr(:self)]
  commands << [:stack_push, NONE]
  commands << [:heap_save]

  # Reserve heaps for local variables
  commands << [:stack_push, HEAP_COUNT_ADDR]
  commands << [:stack_push, @variable_addr_index + 1]
  commands << [:heap_save]

  commands.concat body
  commands << [:flow_exit]
  commands.concat(*@methods)
  commands_to_ws(commands)
end