Chain

This class is used for linear variable ordering for counting and compilation, where each element is an unsigned integer.

• Constructors

We can construct a variable via a default constructor, a copy constructor, a constructor that takes in an unsigned integer as initial size, or a constructor that takes in a vector of unsigned integers.

• void Assign(vector::iterator begin, vector::iterator end)

Clear the chain and assign it the new elements between begin and begin.

• void Reserve(unsigned capa)

Reserve memory for the elements.

• void Append(unsigned elem)

Append an element to the end of the chain.

• void Append(unsigned * elems, unsigned size)

Append several elements to the end of the chain.

• void Append(vector::iterator begin, vector::iterator end)

Append the elements between begin and begin to the end of the chain.