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3. 固定声明
4. 示例声明

示例声明

Created: November-22, 2018

• infixr 5 ++
• infixl 4 <*>, <*, *>, <**>
• infixl 8 `shift`, `rotate`, `shiftL`, `shiftR`, `rotateL`, `rotateR`
• infix 4 ==, /=, <, <=, >=, >
• infix ??

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