How to specialize a generic enum in Swift?

Why are enum const values accessible outside the block in which the enum is defined?

• struct tagged_union { enum {INT, FLOAT, STRING} type; int integer; float floating_point; char *string; } tu; /* Why INT accessible here? */ tu.type = INT; tu.integer = 100;

• Answer:

  You tagged this with both C++ and C, but that "INT" is only accessible in C. In a C++ program, INT is a member of tagged_union and you would have to write tu.type = tu.INT; or tu.type=tagged_union::INT; In a C program, INT is an enumerator constant whose scope is the block scope in which the tagged_union's declaration is located. There simply isn't a struct scope in C and enumerators are not struct members in C.