borsini
commented
10 months ago By the time a solution is found, I came with a workaround: fixing errors using regular expressions replacement directly in generated Kotlin files.
Something like
tasks.register("fixGeneratedParserKotlinCode") {
outputs.upToDateWhen { false }
val directory = File(projectDir, generatedSourcesDirectory)
val funRegex = "var (\\w) : int([\\,,\\)])".toRegex() to "$1: Int$2"
val valRegex = "(.*)var (.*) : int".toRegex() to "$1var $2 = 0"
val regexps = listOf(funRegex, valRegex)
if (!directory.isDirectory) {
println("Invalid directory $directory.")
return@register
}
doLast {
val generatedKotlinFiles = fileTree(directory).matching { include("*.kt") }.files
generatedKotlinFiles.forEach { inputFile ->
val tempFile = File(temporaryDir, "${inputFile.name}.tmp")
inputFile.bufferedReader().use { reader ->
tempFile.bufferedWriter().use { writer ->
reader.forEachLine { line ->
val modifiedLine = regexps.fold(line) { acc: String, (regex, replacement) ->
regex.replace(input = acc, replacement = replacement)
}
writer.write(modifiedLine)
writer.newLine()
}
}
}
if (inputFile.delete() && tempFile.renameTo(inputFile)) {
println("File ${inputFile.name} modified successfully.")
} else {
println("Error modifying the file.")
}
}
}
dependsOn("generateKotlinCommonGrammarSource")
}
Hello and first of all thank you for your work!
I discovered antlr recently and was playing with antlr-kotlin in order to generate a parser and a lexer for this grammar.
ℹ️ A sample repo can be found here
The lexer is generated perfectly, but the parser code contains some errors 👇
They are easy to fix, but it becomes tedious as each time I make a change on the grammar I need to patch the parser again.
I would have liked to contribute by opening a pull request to fix the issue. But I'm a newbie on this subject (antlr/grammars) and woldn't know where to start without a little bit of help.