Partial transition to Scala3.

Author: PapyChacal

README.md

@@ -8,7 +8,7 @@ To learn more about StructTensor, please read [our paper published in OOPSLA'23]
 
 ## Requirements
 
-To run this framework, you need [Scala](https://www.scala-lang.org/download/all.html) 2 of minimum version 2.13.3 and [sbt](https://www.scala-sbt.org/download/) of minimum version 1.7.0. Note that sbt relies on JDK version 8. To compile the generated code, any C++ compiler, such as GCC or Clang can be used.
+To run this framework, you need [Scala](https://www.scala-lang.org/download/all.html) 3 of minimum version 3.3.1 and [sbt](https://www.scala-sbt.org/download/) of minimum version 1.7.0. Note that sbt relies on JDK version 8. To compile the generated code, any C++ compiler, such as GCC or Clang can be used.
 
 ## Usage
 

build.sbt

@@ -1,10 +1,10 @@
-scalaVersion := "2.13.14"
+scalaVersion := "3.3.1"
 
 name := "struct-tensor"
 organization := "uk.ac.ed.dal"
 version := "0.1"
 
-libraryDependencies += "org.scala-lang.modules" %% "scala-parser-combinators" % "1.1.2"
+libraryDependencies += "org.scala-lang.modules" %% "scala-parser-combinators" % "2.0.0"
 libraryDependencies += "com.lihaoyi" %% "fastparse" % "3.0.2"
 libraryDependencies += "com.github.scopt" %% "scopt" % "4.1.0"
 libraryDependencies += "org.scalatest" %% "scalatest" % "3.2.11" % Test

src/main/scala/uk/ac/ed/dal/structtensor/Main.scala

@@ -9,6 +9,7 @@ import codegen._
 
 import java.io.File
 import scopt.OParser
+import scopt.OParserBuilder
 
 object Main extends App {
   import Optimizer._
@@ -67,8 +68,8 @@ object Main extends App {
       outFilePath: String = ""
   )
 
-  val builder = OParser.builder[Config]
-  val parser1 = {
+  val builder: OParserBuilder[Config] = OParser.builder[Config]
+  val parser1: OParser[Unit,Config] = {
     import builder._
     OParser.sequence(
       programName("sturct-tensor"),
@@ -201,7 +202,7 @@ object Main extends App {
             val rcRule = Rule(
               ccRule.head,
               SoPTimesSoP(
-                SoP(Seq(Prod(Seq(ccRule.head.vars2RedundancyVars)))),
+                SoP(Seq(Prod(Seq(ccRule.head.vars2RedundancyVars())))),
                 rmRule.body
               )
             )

src/main/scala/uk/ac/ed/dal/structtensor/codegen/CodegenUtils.scala

@@ -12,7 +12,7 @@ object CodegenUtils {
     .map { case (name, i) => s"const int $name = atoi(argv[${i + 1}]);" }
     .mkString("\n")
 
-  def CPP_printerr(var_name: String, dimensions: Seq[String]) =
+  def CPP_printerr(var_name: String, dimensions: Seq[String]): String =
     s"cerr << $var_name[${dimensions.map(e => s"$e - 1").mkString("][")}] << endl;"
 
   def CPP_return(): String = "return 0;\n}"
@@ -263,7 +263,7 @@ int main(int argc, char **argv){
           .mkString("][")}]);"""
   }
 
-  def CPP_free(var_name: String, dims: Seq[Dim]) = {
+  def CPP_free(var_name: String, dims: Seq[Dim]): String = {
     val dimensions = dims.map(C_convert_index(_))
     val c0 = dimensions.init.zipWithIndex
       .map { case (dim, i) => s"for (size_t i$i = 0; i$i < $dim; ++i$i) {" }
@@ -317,7 +317,7 @@ int main(int argc, char **argv){
     case _     => throw new Exception("Unknown code language")
   }
 
-  def free(lang: String, var_name: String, dims: Seq[Dim]) =
+  def free(lang: String, var_name: String, dims: Seq[Dim]): String =
     lang.toUpperCase() match {
       case "C"   => C_free(var_name)
       case "CPP" => CPP_free(var_name, dims)