在Golang中使用类型定义

Question

In my code I have:

type Dimension big.Int

However, it is not clear to me how I can initialize a dimension object. I know that I can create a big.Int object by doing:

i := big.NewInt(100)

However, how do I convert it to Dimension, or better, how can I initialized it directly as Dimension?

Answer 1

Given:

type Dimension big.Int

There is no way to declare a Dimension without using the big package's Int initializer, since it contains unexported fields. So your best bet is to wrap the underlying initializer with your own:

func NewDimension(i int64) *Dimension {
    x := big.NewInt(100)
    z := Dimension(*x)
    return &z
}

Then call it as:

i := NewDimension(100)