Final answer:
The code representing type blue_or_pink_int with 'Blue of int' and 'Pink of int' is a tagged union, which is a data type used in functional programming to represent values that can be one of several types, each identified by a unique tag.
Step-by-step explanation:
The code snippet type blue_or_pink_int = | Blue of int | Pink of int is an example of a tagged union. In programming languages like OCaml or other functional languages, this syntax defines a data type that can take on one of several explicitly defined and tagged variants; each tag is associated with a value (in this case int).
Essentially, a tagged union is a way to store values that can be one of several fixed types, where each type is tagged to distinguish between them. In the example given, the Blue and Pink tags indicate the type of the value contained is an integer, but they add a layer of description to denote different kinds of values that an int might be representing, such as different categories or states.