Parse error: Muliple annotations with line comment

That code can not be parsed:

@Suppress("unused") //
@JsName("daName")
fun myname(){
....

If the both annotations are switched, it works just fine.

–> The exception occurs if:

• there are two annotations
• there is a line comment between these two annotations

Stack trace: ` ava.lang.IllegalStateException: Unrecognized modifier: // public API

at kastree.ast.psi.Converter$convertModifiers$1.invoke(Converter.kt:367)
at kastree.ast.psi.Converter$convertModifiers$1.invoke(Converter.kt:16)
at kotlin.sequences.TransformingSequence$iterator$1.next(Sequences.kt:172)
at kotlin.sequences.FilteringSequence$iterator$1.calcNext(Sequences.kt:132)
at kotlin.sequences.FilteringSequence$iterator$1.hasNext(Sequences.kt:156)
at kotlin.sequences.SequencesKt___SequencesKt.toCollection(_Sequences.kt:702)
at kotlin.sequences.SequencesKt___SequencesKt.toMutableList(_Sequences.kt:732)
at kotlin.sequences.SequencesKt___SequencesKt.toList(_Sequences.kt:723)
at kastree.ast.psi.Converter.convertModifiers(Converter.kt:371)
at kastree.ast.psi.Converter.convertModifiers(Converter.kt:350)
at kastree.ast.psi.Converter.convertFunc(Converter.kt:304)
at kastree.ast.psi.Converter.convertDecl(Converter.kt:195)
at kastree.ast.psi.Converter.convertFile(Converter.kt:293)
at kastree.ast.psi.Parser.parseFile(Parser.kt:23)
at kastree.ast.psi.Parser.parseFile$default(Parser.kt:23)

`

[martinflorek]

@drieks Now the parsing of “escaped” values in annotations work, but I have found another issue. It does not belong here, so I created a new issue in your repo https://github.com/kotlinx/ast/issues/1

@cretz I still prefer your parser, especially its speed, and it handles everything I have thrown at it except for the comments after annotations. Thank you for this library.

[drieks]

Hi @martinflorek,

maybe my Kotlin parsing library can help you: https://github.com/kotlinx/ast

It is a generic AST parsing library, Kotlin is currently the only supported language. The library is designed that other languages can be easily added. kotlinx.ast does not use the kotlin compiler for paring, it is using ANTLR (the kotlin variant https://github.com/Strumenta/antlr-kotlin) using the official kotlin grammer (https://kotlinlang.org/docs/reference/grammar.html)

One Component is “Klass”, a collection of language independent data classes used to represent and easily access the AST.

Your example code will be parsed fine: https://github.com/kotlinx/ast/commit/d4da88af8bdbcc9d4b5f2a125ee0b985301905e0

• MultiAnnotationsWithLineComment.kt.txt contains the source of your example
• MultiAnnotationsWithLineComment.raw.txt contains the raw AST
• MultiAnnotationsWithLineComment.summary.txt contains the “Klass” Representation you can use:

PackageHeader()
importList
KlassDeclaration(fun parse)
  KlassAnnotation(Annotation1)
    KlassArgument()
      KlassString
        "abc"
  KlassAnnotation(Annotation2)
    KlassArgument()
      KlassString
        "123"

using kotlin code, this is:

listOf(
  PackageHeader(),
  DefaultAstNode("importList"),
  KlassDeclaration(
    keyword = "fun",
    identifier = KlassIdentifier("parse"),
    annotations = listOf(
      KlassAnnotation(KlassIdentifier("Annotation1")),
      KlassAnnotation(KlassIdentifier("Annotation2"))
    )
)

There are some parts missing, for example the importList is not converted into an easy-to-use data class. But I’m already using the library for AST parsing. You can just open the project in IDEA or run ./gradlew clean check publishToMavenLocal if you want to use it locally.

Please let me know if you have any questions, or just open an issue 😃