CODEWITHSUNDEEP
functionkotlinvariablesreferenceambiguity
Сергей Андриенко
Сергей Андриенко

Reputation: 11

How to get reference to the function or variable with the same name in Kotlin?

The problem is when I try to get the reference to testVar variable in Kotlin, ambiguity occurs if I have a function with the same name as the variable. Is there a solution for this?

class TestClassBuilder {

    lateinit var mainVar: String
    lateinit var testVar: String

    fun mainVar(mainVar: String) = apply {
        this.mainVar = mainVar
    }

    fun testVar(testVar: String) = apply {
        this.testVar = testVar
    }
    
    fun build() {
        if (!::testVar.isInitialized) {
            testVar = mainVar.substring(0, 5)
        }
        // ...
    }
}

I've tried to rename variable and, of course, it worked, but I'd like to know if there is a better solution.

Upvotes: 1

Views: 233

Answers (1)

Nazarii Moshenskyi
Nazarii Moshenskyi

Reputation: 2108

You can't do anything with this problem, but you don't need it. If you use Kotlin properties it will generate setters for you.

First of all, please check how properties work - link

Then you use plain properties:

class TestClassBuilder {
    lateinit var mainVar: String
    lateinit var testVar: String

    fun build() {
        if (!::testVar.isInitialized) {
            testVar = mainVar.substring(0, 5)
        }
    }
}

fun main() {
    val builder = TestClassBuilder()
    builder.mainVar = "some text"
}

And here is how you can use setters from Java:

public class C {
    public static void main(String[] args) {
        TestClassBuilder t = new TestClassBuilder();
        t.mainVar = "some text"; // variant 1
        t.setMainVar("another text"); // variant 2
    }
}

Also you can add visibility modifiers for getters and setters or even custom logic:

var testVar: String = ""
    set(value) {
        field = if (value.startsWith("abc")) {
            value.removePrefix("abc")
        } else value
    }

Upvotes: 0

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