: index_(index),
      name_(name),
      var_(var),
      definition_stack_trace_(definition_stack_trace) {}

VariableInfo::VariableInfo(VariableInfo&& other)
    : index_(other.index_),
      var_(other.var_),
      definition_stack_trace_(other.definition_stack_trace_),
      lock_held_(other.lock_held_) {
  other.index_ = -1;
  other.var_ = nullptr;
}

    with backprop.GradientTape() as gt:
      for var_ in vars_:
        gt.watch(var_)
      y = compute_op(**op_kwargs)  # uses op and decomposites by the graph pass.
      grads = gt.gradient(y, vars_)  # uses registered gradient function.

    # compute with composition
    with backprop.GradientTape() as gt:
      for var_ in vars_:
        gt.watch(var_)
      re_y = compute_composite(**kwargs)  # uses composite function.

  int index() const { return index_; }

  // A pointer to the resource variable.  May be null if this VariableInfo is
  // "empty", i.e. it does not track a resource variable.
  Var* var() const { return var_; }

  // Returns the variable name.
  absl::string_view name() const { return name_; }

  // Returns true if the resource variable lock was successfully acquired by
  // this thread.

		{unescaped: "loop", escaped: "__loop__"},
		{unescaped: "package", escaped: "__package__"},
		{unescaped: "namespace", escaped: "__namespace__"},
		{unescaped: "return", escaped: "__return__"},
		{unescaped: "var", escaped: "__var__"},
		{unescaped: "void", escaped: "__void__"},
		{unescaped: "while", escaped: "__while__"},
		// Not all property names are escapable
		{unescaped: "@", unescapable: true},
		{unescaped: "1up", unescapable: true},

	_ = x[_Import-36]
	_ = x[_Interface-37]
	_ = x[_Map-38]
	_ = x[_Package-39]
	_ = x[_Range-40]
	_ = x[_Return-41]
	_ = x[_Select-42]
	_ = x[_Struct-43]
	_ = x[_Switch-44]
	_ = x[_Type-45]
	_ = x[_Var-46]
	_ = x[tokenCount-47]
}

const _token_name = "EOFnameliteralopop=opop=:=<-*([{)]},;:....breakcasechanconstcontinuedefaultdeferelsefallthroughforfuncgogotoifimportinterfacemappackagerangereturnselectstructswitchtypevar"

	_Map         // map
	_Package     // package
	_Range       // range
	_Return      // return
	_Select      // select
	_Struct      // struct
	_Switch      // switch
	_Type        // type
	_Var         // var

	// empty line comment to exclude it from .String
	tokenCount //
)

const (
	// for BranchStmt
	Break       = _Break
	Continue    = _Continue
	Fallthrough = _Fallthrough