Szathmáry László honlapja @ DEIK | Nim2 / type definition

In C, we have typedef. With typedef we can put a new type name on an existing type. How to do the same in Nim?

typedef
#include <stdio.h> typedef int whole; int main() { int x = 2; whole y = 5; printf("%d, %d\n", x, y); // 2, 5 return 0; }	type CharSet = set[char] let digits1: set[char] = {'1' .. '9'} digits2: CharSet = {'1' .. '9'} echo digits1 # {'1', '2', '3', '4', '5', '6', '7', '8', '9'} echo digits2 # {'1', '2', '3', '4', '5', '6', '7', '8', '9'}

In the C example, whole is just a different name for int.

It's the same in Nim: CharSet is just a more readable name for set[char], and the two are interchangeable.

Subtle difference: in C, we put the secondary name to the end. In Nim, we put the secondary name to the beginning.