Unable to use example class, because I am unable to import classes

[rahullohra2903]

Hi, Please help in what I am doing wrong
I am unable to use this AstSource

Dependencies used -

    implementation 'com.github.drieks.antlr-kotlin:antlr-kotlin-runtime-jvm:b09d76328'
    implementation 'com.github.drieks.antlr-kotlin:antlr-kotlin-runtime:b09d76328'
    api("com.github.kotlinx.ast:grammar-kotlin-parser-antlr-kotlin:b09d76328")

Sample code -

    val source = AstSource.File(
        "grammar-kotlin-parser-antlr-kotlin/src/jvmTest/kotlin/kotlinx/ast/example/ExampleMain.kt"
    )
    val kotlinFile = KotlinGrammarAntlrKotlinParser.parseKotlinFile(source)
    kotlinFile.summary(attachRawAst = false)
        .onSuccess { astList ->
            astList.forEach(Ast::print)
        }.onFailure { errors ->
            errors.forEach(::println)
        }
}

Error -
Unable to import class - AstSource

[drieks]

Hi @rahullohra2903,
can you show me the full gradle file(s)?

[rahullohra2903]

Here are the files @drieks
settings.gradle

rootProject.name = 'KotlinAst'
enableFeaturePreview("GRADLE_METADATA")

build.gradle

buildscript {
    repositories {
        mavenCentral()
        jcenter()
        maven { url "https://jitpack.io" }
    }
}

plugins {
    id 'groovy'
    id 'java'
    id 'org.jetbrains.kotlin.jvm' version '1.3.72'
    id 'antlr'
}

group 'org.example'
version '1.0-SNAPSHOT'


repositories {
    mavenCentral()
    jcenter()
    maven { url "https://jitpack.io" }
}

dependencies {

    compile 'org.codehaus.groovy:groovy-all:2.3.11'
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8"
    testCompile group: 'junit', name: 'junit', version: '4.12'
    implementation 'com.github.drieks.antlr-kotlin:antlr-kotlin-gradle-plugin:b09d76328'
    implementation 'com.github.drieks.antlr-kotlin:antlr-kotlin-runtime-jvm:b09d76328'
    implementation 'com.github.drieks.antlr-kotlin:antlr-kotlin-runtime:b09d76328'
}

compileKotlin {
    kotlinOptions.jvmTarget = "1.8"
}
compileTestKotlin {
    kotlinOptions.jvmTarget = "1.8"
}

[drieks]

Hi @rahullohra2903,

I'm not sure what you are trying to do. You need com.github.drieks.antlr-kotlin:antlr-kotlin-gradle-plugin if you want to convert a ANTLR-Grammar into a parser written in Kotlin. com.github.kotlinx.ast:grammar-kotlin-parser-antlr-kotlin-jvm already contains such a parser, created from the official kotlin language grammar (https://kotlinlang.org/docs/reference/grammar.html).

Because you opened the Issue here, I think you don't want to create a grammar, therefore you don't need antlr-kotlin directly. com.github.kotlinx.ast:grammar-kotlin-parser-antlr-kotlin-jvm contains a dependency to antlr-kotlin.

You also don't need the groovy, java and antlr plugins to just run the example. The buildscript part is also not required.

Please try this build.gradle file and yours settings.gradle:

plugins {
    id 'org.jetbrains.kotlin.jvm' version '1.3.72'
}

group 'org.example'
version '1.0-SNAPSHOT'

repositories {
    mavenCentral()
    jcenter()
    maven { url "https://jitpack.io" }
}

dependencies {
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8"
    api("com.github.kotlinx.ast:grammar-kotlin-parser-antlr-kotlin-jvm:c35b50fa44")
}

compileKotlin {
    kotlinOptions.jvmTarget = "1.8"
}

compileTestKotlin {
    kotlinOptions.jvmTarget = "1.8"
}

kotlinx.ast support different parsers, you can also choose the parser generated by the official java antlr: KotlinGrammarAntlrJavaParser (https://github.com/kotlinx/ast/blob/master/grammar-kotlin-parser-antlr-java/src/test/kotlin/kotlinx/ast/example/ExampleMain.kt)

The API of kotlinx.ast is always the same, only the name of the implementation differs

• KotlinGrammarAntlrKotlinParser is provided by api("com.github.kotlinx.ast:grammar-kotlin-parser-antlr-kotlin-jvm:c35b50fa44")
• KotlinGrammarAntlrJavaParser is provided by api("com.github.kotlinx.ast:grammar-kotlin-parser-antlr-java-jvm:c35b50fa44")
• parseKotlinFile is supported by both versions, just choose one of them.

antlr-java creates parsers written in java, antlr-kotlin creates parsers written in kotlin, but if you are using kotlinx.ast you won't see the parser because it is only internally used by kotlinx.ast. I hope this helps you :-).

Your example for KotlinGrammarAntlrKotlinParser:

package issue12

import kotlinx.ast.common.AstSource
import kotlinx.ast.common.ast.Ast
import kotlinx.ast.common.print
import kotlinx.ast.grammar.kotlin.common.summary
import kotlinx.ast.grammar.kotlin.target.antlr.kotlin.KotlinGrammarAntlrKotlinParser

fun main() {
    val source = AstSource.File(
            "grammar-kotlin-parser-antlr-kotlin/src/jvmTest/kotlin/kotlinx/ast/example/ExampleMain.kt"
    )
    val kotlinFile = KotlinGrammarAntlrKotlinParser.parseKotlinFile(source)
    kotlinFile.summary(attachRawAst = false)
            .onSuccess { astList ->
                astList.forEach(Ast::print)
            }.onFailure { errors ->
                errors.forEach(::println)
            }
}

[rahullohra2903]

Thank you @drieks for your support . Everything is fine now. The build.gradle that you shared is running fine.

Only 1 dependency
implementation "com.github.kotlinx.ast:grammar-kotlin-parser-antlr-kotlin-jvm:c35b50fa44"

was required in the build.gradle file

Thank you for providing guidance in antlr-java and antlr-kotlin