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This article introduces the relevant knowledge of "example Analysis of scala implicit conversion priority problem". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

The implicit conversion compiler gives priority to selecting the parameters of the method as the conversion object, as verified as follows:

Object rct {

Implicit def intToBook (num:Int) = new Book (num)

Implicit def bookToInt (book:Book) = book.number

Class Book (val number:Int) {

Def + (that: Book) = new Book (this.number + that.number)

}

Def main (args: Array [String]): Unit = {

Val book1 = new Book

Val book2 = new Book

Val book3 = book1 + book2

Println (book3.isInstanceOf [Book])

Val book4 = book1 + 200

Println (book4.isInstanceOf [Book])

Val book5 = 200 + book1

Println (book5.isInstanceOf [int])

Print:

True

True

True

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