I’m trying to pass `emptyList()` to `.defaultValue...

# squarelibraries

[jean]

I’m trying to pass emptyList() to .defaultValue("%L", defaultValue) but it generate an array instead : public val myList: List<String> = [] which fails. How can I fix it to generate public val myList: List<String> = emptyList() instead?

[Chrimaeon]

how did you define defaultValue that you pass to the method?

[jean]

I used this code

val defaultValue: List<String> = emptyList<String>()
ParameterSpec.builder(
    name = "myList",
    type = List::class.java.asClassName()
        .parameterizedBy(String::class.java.asClassName())
)
    .defaultValue("%L", defaultValue)
    .build()

[Chrimaeon]

you need to define a MemberName to get a reference to a function/member. what your code is doing is evaluate emptyList and put that value as a literal. See https://square.github.io/kotlinpoet/#m-for-members

What you need is

val emptylist = MemberName("kotlin.collections", "emptylist")

ParameterSpec.builder("myList", List::class.parameterizedBy(String::class))
            .defaultValue("%M()", emptylist)
            .build()

[jean]

Thanks!