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25 Nov. 2020
regular enum test
References:
1. https://stackoverflow.com/questions/8357240/how-to-automatically-convert-strongly-typed-enum-into-int
1. [my ans]https://stackoverflow.com/a/65014885/4561887
*******************************************************************************/
#include <iostream>
#include <stdio.h>
// enum class (AKA: "strong" or "scoped" enum)
enum class my_enum
{
A = 0,
B,
C,
};
// regular enum (AKA: "weak" or "C-style" enum)
enum my_enum2
{
MY_ENUM_A = 0,
MY_ENUM_B,
MY_ENUM_C,
};
int main()
{
printf("Hello World\n");
// 1) scoped enum
my_enum e = my_enum::A; // scoped through `my_enum::`
e = my_enum::B;
// int i = e; // NOT ALLOWED!
// But this works fine:
int i = static_cast<int>(e);
// 2) regular enum
my_enum2 e2 = MY_ENUM_A; // scoped through `MY_ENUM_`
e2 = MY_ENUM_B;
// This works fine!
int i2 = e2;
return 0;
}
