Class: Minjs::ECMA262::StFunc

Inherits:
Statement show all
Defined in:
lib/minjs/ecma262/statement.rb

Overview

Base class of ECMA262 FunctionDeclaration / FunctionExpression element

See Also:

Instance Attribute Summary collapse

Attributes inherited from Base

#parent

Instance Method Summary collapse

Methods inherited from Statement

#empty?, #to_exp?, #to_return?

Methods inherited from Base

#add_remove_paren, #concat, #replace

Constructor Details

#initialize(var_env, name, args, statements, options = {}) ⇒ StFunc

Returns a new instance of StFunc.



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# File 'lib/minjs/ecma262/statement.rb', line 1539

def initialize(var_env, name, args, statements, options = {})
  @var_env = var_env
  @name = name
  @args = args #=> array
  @statements = statements #=> Prog
  @decl = options[:decl]
  @getter = options[:getter]
  @setter = options[:setter]
end

Instance Attribute Details

#args ⇒ Object (readonly)

Returns the value of attribute args.



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# File 'lib/minjs/ecma262/statement.rb', line 1534

def args
  @args
end

#exe_context ⇒ Object

Returns the value of attribute exe_context.



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# File 'lib/minjs/ecma262/statement.rb', line 1537

def exe_context
  @exe_context
end

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/minjs/ecma262/statement.rb', line 1533

def name
  @name
end

#statements ⇒ Object (readonly)

Returns the value of attribute statements.



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# File 'lib/minjs/ecma262/statement.rb', line 1535

def statements
  @statements
end

#var_env ⇒ Object (readonly)

Returns the value of attribute var_env.



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# File 'lib/minjs/ecma262/statement.rb', line 1536

def var_env
  @var_env
end

Instance Method Details

#==(obj) ⇒ Object

compare object



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# File 'lib/minjs/ecma262/statement.rb', line 1574

def ==(obj)
  self.class == obj.class and
    @name == obj.name and
    @args == obj.args and
    @statements == obj.statements
end

#decl? ⇒ Boolean

Returns true if this object is function declaration

Returns:



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# File 'lib/minjs/ecma262/statement.rb', line 1610

def decl?
  @decl
end

#deep_dup ⇒ Object

duplicate object

See Also:



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# File 'lib/minjs/ecma262/statement.rb', line 1556

def deep_dup
  self.class.new(@var_env, @name ? @name.deep_dup : nil,
                     @args.collect{|args|args.deep_dup},
                     @statements.deep_dup,
                     {decl: @decl, getter: @getter, setter: @setter})
end

#enter(outer_exe_context) ⇒ Object 



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# File 'lib/minjs/ecma262/statement.rb', line 1614

def enter(outer_exe_context)
  local_env = LexEnv.new_declarative_env(outer_exe_context.lex_env)
  var_env.record.binding.each do |k, v|
    local_env.record.create_mutable_binding(k, nil)
    val = v.delete(:value)
    local_env.record.set_mutable_binding(k, val, nil, v)
  end
  new_exe_context = ExeContext.new
  new_exe_context.lex_env = local_env
  new_exe_context.var_env = var_env
  new_exe_context
end

#getter? ⇒ Boolean

Returns true if this object is setter in object

Returns:



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# File 'lib/minjs/ecma262/statement.rb', line 1600

def getter?
  @getter
end

#left_hand_side_exp? ⇒ Boolean

Returns true if expression is kind of LeftHandSideExpression.

Returns:

  • (Boolean) —

    true if expression is kind of LeftHandSideExpression.



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# File 'lib/minjs/ecma262/statement.rb', line 1595

def left_hand_side_exp?
  true
end

#priority ⇒ Fixnum

Returns expression priority.

Returns:

  • (Fixnum) —

    expression priority



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# File 'lib/minjs/ecma262/statement.rb', line 1550

def priority
  PRIORITY_PRIMARY
end

#setter? ⇒ Boolean

Returns true if this object is setter in object

Returns:



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# File 'lib/minjs/ecma262/statement.rb', line 1605

def setter?
  @setter
end

#to_js(options = {}) ⇒ Object

Returns a ECMAScript string containg the representation of element.

See Also:



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# File 'lib/minjs/ecma262/statement.rb', line 1583

def to_js(options = {})
  _args = @args.collect{|x|x.to_js(options)}.join(",")
  if @getter
    concat options, :get, @name, "()", "{", @statements, "}"
  elsif @setter
    concat options, :set, @name, '(', _args, ")", "{", @statements, "}"
  else
    concat options, :function, @name, '(', _args, ")", "{", @statements, "}"
  end
end

#traverse(parent) {|parent, _self| ... } ⇒ Object

Traverses this children and itself with given block.

Yields:

Yield Parameters:



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# File 'lib/minjs/ecma262/statement.rb', line 1564

def traverse(parent, &block)
  @name.traverse(self, &block) if @name
  @args.each do |arg|
    arg.traverse(self, &block)
  end
  @statements.traverse(self, &block)
  yield parent, self
end