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kotlinlang

This might be a dumb question but where are the method bodies for the operators functions inside Primitives.kt

As I said (<https://kotlinlang.slack.com/archives/C0B8MA7FA/p1561059246214900?thread_ts=1560978823.192000&amp;cid=C0B8MA7FA>), they don't have bodies, they're compiler intrinsics. They just end up as single inlined bytecode instructions on the JVM.

But now I do want to know where that code is in the compiler :smile:

do you know any examples in the stdlib that have operators functions with bodies?

Lists, BigInteger, BigDecimal, Arrays, String.

No, the String class also doesn't have a body

BigDecimal doesnt have any operator funs at all

Arrays: <https://github.com/JetBrains/kotlin/blob/master/libraries/stdlib/jvm/src/generated/_ArraysJvm.kt#L1445>
List: <https://github.com/JetBrains/kotlin/blob/master/libraries/stdlib/common/src/generated/_Collections.kt#L2023>
BigInteger: <https://github.com/JetBrains/kotlin/blob/master/libraries/stdlib/jvm/src/kotlin/util/BigIntegers.kt#L19>

You're right, I can't find one for strings.

for some reason they are not like this when I open them in IntelliJ

They are for me, I just did `Ctrl+B` on the `+` in this code:
```
val x = arrayOf(1,2,3) + arrayOf(4,5,6)
val y = listOf(1,2,3) + listOf(4,5,6)
```

BigInteger doesnt have this function in my source code

Where does `Ctrl+B` on ```val z = BigInteger.ONE + BigInteger.ONE``` get you?