==================================
演算子
==================================

以下の演算子が定義されています。

単項演算子

+--------------+----------------+----------------+-----------------------------------+
| 演算子       | 引数の型       | 返り値の型     | 説明                              |
|              |                |                |                                   |
+==============+================+================+===================================+
| \!           | bool           | int            | 否定                              |
+--------------+----------------+----------------+-----------------------------------+
| \-           | int            | int            | マイナス                          |
+              +----------------+----------------+                                   +
|              | double         | double         |                                   |
+--------------+----------------+----------------+-----------------------------------+

二項演算子

+--------------+----------------+----------------+-----------------------------------+
| 演算子       | 引数の型       | 返り値の型     | 説明                              |
|              |                |                |                                   |
+==============+================+================+===================================+
| \+           | int, int       | int            | 加算                              |
+              +----------------+----------------+                                   +
|              | double, double | double         |                                   |
+              +----------------+----------------+                                   +
|              | string, string | string         |                                   |
+--------------+----------------+----------------+-----------------------------------+
| \-           | int, int       | int            | 減算                              |
+              +----------------+----------------+                                   +
|              | double, double | double         |                                   |
+--------------+----------------+----------------+-----------------------------------+
| \*, \/       | int, int       | int            | 乗算, 除算                        |
+              +----------------+----------------+                                   +
|              | double, double | double         |                                   |
+--------------+----------------+----------------+-----------------------------------+
| \%           | int, int       | int            | 剰余                              |
+--------------+----------------+----------------+-----------------------------------+
| \^           | double, double | double         | 累乗                              |
+--------------+----------------+----------------+-----------------------------------+
| >=, <=, >, < | int, int       | bool           | 以上、以下、より大きい、より小さい|
+              +----------------+----------------+                                   +
|              | double, double | bool           |                                   |
+--------------+----------------+----------------+-----------------------------------+
| ==, !=       | int, int       | bool           | 等しい、等しくない                |
+              +----------------+----------------+                                   +
|              | double, double | bool           |                                   |
+              +----------------+----------------+                                   +
|              | string, string | bool           |                                   |
+              +----------------+----------------+                                   +
|              | bool, bool     | bool           |                                   |
+--------------+----------------+----------------+-----------------------------------+
| &&, ||       | bool, bool     | bool           | かつ、または                      |
+--------------+----------------+----------------+-----------------------------------+


演算子の優先順位は以下の通りです

+--------------+---------------------+
| 優先順位     | 演算子              |
|              |                     |
+==============+=====================+
| 1            | ^                   |
+--------------+---------------------+
| 2            | （単項）-,（単項）! |
+--------------+---------------------+
| 3            | \*, /, %            |
+--------------+---------------------+
| 4            | +, -                |
+--------------+---------------------+
| 5            | >=, <=, >, <        |
+--------------+---------------------+
| 6            | ==, !=              |
+--------------+---------------------+
| 7            | &&                  |
+--------------+---------------------+
| 8            | ||                  |
+--------------+---------------------+