in particular i am unable to instance lexer(...) itself from inside the clone() function

# announcements

[Smallville7123]

in particular i am unable to instance lexer(...) itself from inside the clone() function

[bbaldino]

you're saying that in lexer#clone you can't create an instance of lexer? what error do you get?

[Smallville7123]

https://bpaste.net/show/cb21048a41b6

[Smallville7123]

Caused by: java.lang.NoSuchMethodError: Build_gradle$lexer.<init>(Ljava/nio/ByteBuffer;Ljava/lang/String;)V
	at Build_gradle$lexer.clone(build.gradle.kts:258)

[bbaldino]

(oh, sorry, didn't notice that at the top of the paste)

[bbaldino]

i don't seem to get an error in a scratch file. could it be something about how you have them implemented that isn't in the paste?

[Smallville7123]

ill attempt to make a minimal example

[Smallville7123]

minimal example:

a/build.gradle.kts :

import java.io.File;
import java.io.RandomAccessFile;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;

fun fileToByteBuffer(f : File) : ByteBuffer {
    val file = RandomAccessFile(f, "r")
    val fileChannel = file.getChannel()
    var i = 0
    var buffer = ByteBuffer.allocate(fileChannel.size().toInt())
    fileChannel.read(buffer)
    buffer.flip()
    return buffer
}

val filetmp = "/sda3_partition_resize_to_size"

class lexer(stm : ByteBuffer, delimiter : String) {
    val f = stm
    val delimiters = delimiter
    fun clone() {
        val ll = lexer(fileToByteBuffer(File(filetmp)), "none")
    }
}

tasks.register("test") {
    val lex = lexer(fileToByteBuffer(File(filetmp)), "none")
    println("cloning")
    lex.clone()
    println("clone sucesfull")
}

app/build.gradle :

apply from: '../a/build.gradle.kts'

preBuild.dependsOn test

[bbaldino]

i just pasted it into a quick kotlin file and changed the task to a main. i get a filenotfoundexception (since i don't have that file) but no complaint about the instantiation

[Smallville7123]

u need to manually create the file lol (or change it to a file that DOES exist)

[bbaldino]

did that but still runs fine

[bbaldino]

i'm on kotlin 1.3.21

[bbaldino]

image.png

[Smallville7123]

no, you need to run it as a kotlin build script

[Smallville7123]

also it fails even if the function is outside of the class itself

fun lexerClone(stm : ByteBuffer, tokens : String) : lexer {
    return lexer(stm, tokens)
}

class lexer ...

[Smallville7123]

with the same error

[Smallville7123]

the only way i can get it to work is this which is kinda annoying

val lex = lexer(fileToByteBuffer(File(src)), tokens)
    println("cloning")
    val la = lexer(lex.f.duplicate(), lex.delimiters)
    println("clone made")
    var line = lex.lex()
    var laline = la.lex()
    println("line is '$line'")
    println("laline is '$laline'")

cloning
clone made
line is '
'
laline is '
'