List   []Stmt
		Rbrace Pos
		stmt
	}

	ExprStmt struct {
		X Expr
		simpleStmt
	}

	SendStmt struct {
		Chan, Value Expr // Chan <- Value
		simpleStmt
	}

	DeclStmt struct {
		DeclList []Decl
		stmt
	}

	AssignStmt struct {
		Op       Operator // 0 means no operation
		Lhs, Rhs Expr     // Rhs == nil means Lhs++ (Op == Add) or Lhs-- (Op == Sub)
		simpleStmt
	}