Hello, I want to add a parameter to function expr...

# compiler

[Ayla]

Hello, I want to add a parameter to function expressions: val f={} ->`val f={i:Int-> }` ,I tried this:

moduleFragment.transformChildrenVoid(object :
    IrElementTransformerVoidWithContext() {
    override fun visitFunctionExpression(expression: IrFunctionExpression): IrExpression {
        expression.function.addValueParameter {
            name= Name.identifier("i")
            type=pluginContext.referenceClass(ClassId.fromString("<http://kotlin.Int|kotlin.Int>"))?.owner?.defaultType!!
        }

        return super.visitFunctionExpression(expression)
    }
})

but got an error:

Caused by: java.lang.IllegalArgumentException: No argument for parameter VALUE_PARAMETER name:a index:0 type:<http://kotlin.Int|kotlin.Int>:
CALL 'public final fun invoke (a: <http://kotlin.Int|kotlin.Int>): kotlin.Unit declared in <root>.FileKt.<clinit>.<no name provided>' type=kotlin.Unit origin=BRIDGE_DELEGATION
  $this: GET_VAR '<this>: <root>.FileKt.<clinit>.<no name provided> declared in <root>.FileKt.<clinit>.<no name provided>.invoke' type=<root>.FileKt.<clinit>.<no name provided> origin=null

I'm new to kotlin compiler plugin, and I'm confused as the function expression is not invoked,so where should I pass the argument ? Or the way I add the paramter is wrong?

[dmitriy.novozhilov]

Seems like you forgot to update the type of original expression (IrFunctionExpression)
Note that after such transformation you need to update the type of each call-site of f (and type of f itself too)

[Ayla]

Oh, thank you