IAR compiles STM8S pin operation to modify the library function

IAR compiles the built-in library functions of STM8S. We all know that there is a definition of each IO port as follows:

typedef enum

{

 GPIO_PIN_0 = ((u8)0x01), /*!< Pin 0 selected */

 GPIO_PIN_1 = ((u8)0x02), /*!< Pin 1 selected */

 GPIO_PIN_2 = ((u8)0x04), /*!< Pin 2 selected */

 GPIO_PIN_3 = ((u8)0x08), /*!< Pin 3 selected */

 GPIO_PIN_4 = ((u8)0x10), /*!< Pin 4 selected */

 GPIO_PIN_5 = ((u8)0x20), /*!< Pin 5 selected */

 GPIO_PIN_6 = ((u8)0x40), /*!< Pin 6 selected */

 GPIO_PIN_7 = ((u8)0x80), /*!< Pin 7 selected */

 GPIO_PIN_LNIB = ((u8)0x0F), /*!< Low nibble pins selected */

 GPIO_PIN_HNIB = ((u8)0xF0), /*!< High nibble pins selected */

 GPIO_PIN_ALL = ((u8)0xFF) /*!< All pins selected */

}GPIO_Pin_TypeDef;

Then when calling GPIO_Pin_TypeDef, if more parameters are passed, a red font prompt will appear. Although it will not have any effect, it looks awkward.

Such as the function void GPIO_WriteBit(GPIO_TypeDef* GPIOx, GPIO_Pin_TypeDef GPIO_Pin, BitAction GPIO_BitVal)

Operation void GPIO_WriteBit(GPIOA, GPIO_PIN_0 , BitAction GPIO_BitVal) //No alarm will be prompted

Operation void GPIO_WriteBit(GPIOA, GPIO_PIN_0|PIO_PIN_1, BitAction GPIO_BitVal) //will prompt an alarm

Warning[Pe188]: enumerated type mixed with another type C:Program FilesIAR SystemsEmbedded Workbench 6.0stm8examplesST-LINKCopySTM8S105C6-BoardProjectDiscoversrcmain.c 215 

Therefore, I defined the macro as follows, and when I passed multiple parameters again, there was no warning prompt.

#define GPIO_PIN_0 ((u8)0x01) /*!< Pin 0 selected */

#define GPIO_PIN_1 ((u8)0x02) /*!< Pin 1 selected */

#define GPIO_PIN_2 ((u8)0x04) /*!< Pin 2 selected */

#define GPIO_PIN_3 ((u8)0x08) /*!< Pin 3 selected */

#define GPIO_PIN_4 ((u8)0x10) /*!< Pin 4 selected */

#define GPIO_PIN_5 ((u8)0x20) /*!< Pin 5 selected */

#define GPIO_PIN_6 ((u8)0x40) /*!< Pin 6 selected */

#define GPIO_PIN_7 ((u8)0x80) /*!< Pin 7 selected */

#define GPIO_PIN_LNIB ((u8)0x0F)

#define GPIO_PIN_HNIB ((u8)0xF0)

#define GPIO_PIN_ALL ((u8)0xFF)