In the C programming language, restrict is a keyword, introduced by the C99 standard, that can be used in pointer declarations. By adding this type qualifier, a programmer hints to the compiler that for the lifetime of the pointer, no other pointer will be used to access the object to which it points.
as you can see the restrict was declared as keyword from c99 so we can't use it as a variable
ridiculousfish
commented
6 months ago
In the C programming language, restrict is a keyword, introduced by the C99 standard, that can be used in pointer declarations. By adding this type qualifier, a programmer hints to the compiler that for the lifetime of the pointer, no other pointer will be used to access the object to which it points.
as you can see the restrict was declared as keyword from c99 so we can't use it as a variable
so i changed restrict => restriction!