Scala hex literal for bytes

Question

Hex literal containing A-F digit are converting to int by default. When I am trying to declear an Int with 0x it is creating correctly. ``` val a: Int = 0x34 val b: Int = 0xFF ``` But when I am trying to declear a Byte with 0x second line is not compiling ``` val a: Byte = 0x34 val b: Byte = 0xFF // compilation error ``` I have found a workaround that is ``` val a: Byte = 0x34 val b: Byte = 0xFF.toByte ``` But is there any decent way to declear a Byte from its hex literal? For example I am trying to declear a Byte array in a Test method in this way ``` anObject.someMethod(1, 1.1f, 0xAB, "1") shouldBe Array[Byte](0xAF, 0xAF, 0xAF, 0xAF, 0xAF, 0xAF, 0xAF, 0xAF, 0xAF, 0xAF, 0xAF, 0xAF, 0xAF, 0xAF, 0xAF, 0xAF, 0xAF, 0xAF, 0xAF, 0xAF, 0xAF, 0xAF, 0xAF, 0xAF) anObject.someMethod(2, 2.2f, 0xCD, "2") shouldBe Array[Byte](0xBE, 0xBE, 0xBE, 0xBE, 0xBE, 0xBE, 0xBE, 0xBE, 0xBE, 0xBE, 0xBE, 0xBE, 0xBE, 0xBE, 0xBE, 0xBE, 0xBE, 0xBE, 0xBE, 0xBE, 0xBE, 0xBE, 0xBE, 0xBE) anObject.someMethod(3, 3.2f, 0…

Accepted Answer

You can do this with implicit conversions.

Before:

```
def f(b: Byte) = println(s"Byte = $b")
f(0x34)
f(0xFF) // compilation error
```

After:

```
implicit def int2Byte(i: Int) = i.toByte

def f(b: Byte) = println(s"Byte = $b")
f(0x34)
f(0xFF)
```

Output:

```
Byte = 52
Byte = -1
```

Scala hex literal for bytes

Solution

Problem

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