Enable new inference in the compiler

build.gradle.kts

@@ -146,6 +146,7 @@ extra["versions.markdown"] = "0.1.25"
 val isTeamcityBuild = project.hasProperty("teamcity") || System.getenv("TEAMCITY_VERSION") != null
 val intellijUltimateEnabled = project.getBooleanProperty("intellijUltimateEnabled") ?: isTeamcityBuild
 val effectSystemEnabled by extra(project.getBooleanProperty("kotlin.compiler.effectSystemEnabled") ?: false)
+val newInferenceEnabled by extra(project.getBooleanProperty("kotlin.compiler.newInferenceEnabled") ?: false)
 
 val intellijSeparateSdks = project.getBooleanProperty("intellijSeparateSdks") ?: false
 

compiler/build.gradle.kts

@@ -14,17 +14,23 @@ val compilerModules: Array<String> by rootProject.extra
 val otherCompilerModules = compilerModules.filter { it != path }
 
 val effectSystemEnabled: Boolean by rootProject.extra
-if (effectSystemEnabled) {
-    allprojects {
-        tasks.withType<KotlinCompile<*>> {
-            kotlinOptions {
-                freeCompilerArgs += listOf("-Xeffect-system")
+val newInferenceEnabled: Boolean by rootProject.extra
+
+configureFreeCompilerArg(effectSystemEnabled, "-Xeffect-system")
+configureFreeCompilerArg(newInferenceEnabled, "-Xnew-inference")
+
+fun configureFreeCompilerArg(isEnabled: Boolean, compilerArgument: String) {
+    if (isEnabled) {
+        allprojects {
+            tasks.withType<KotlinCompile<*>> {
+                kotlinOptions {
+                    freeCompilerArgs += listOf(compilerArgument)
+                }
             }
         }
     }
 }
 
-
 val depDistProjects = listOf(
         ":kotlin-script-runtime",
         ":kotlin-stdlib",

gradle.properties

@@ -4,6 +4,7 @@ org.gradle.configureondemand=false
 org.gradle.jvmargs=-Duser.country=US -Dkotlin.daemon.jvm.options=-Xmx1600m
 
 kotlin.compiler.effectSystemEnabled=true
+kotlin.compiler.newInferenceEnabled=true
 #maven.repository.mirror=http://repository.jetbrains.com/remote-repos/
 #bootstrap.kotlin.repo=https://dl.bintray.com/kotlin/kotlin-dev
 #bootstrap.kotlin.version=1.1.50-dev-1451