[CLI] Introduce compiler argument to suppress error about API version

...greater than language version.

^KT-63712

compiler/cli/cli-common/gen/org/jetbrains/kotlin/cli/common/arguments/CommonCompilerArgumentsCopyGenerated.kt

@@ -70,6 +70,7 @@ fun copyCommonCompilerArguments(from: CommonCompilerArguments, to: CommonCompile
     to.selfUpperBoundInference = from.selfUpperBoundInference
     to.skipMetadataVersionCheck = from.skipMetadataVersionCheck
     to.skipPrereleaseCheck = from.skipPrereleaseCheck
+    to.suppressApiVersionGreaterThanLanguageVersionError = from.suppressApiVersionGreaterThanLanguageVersionError
     to.suppressVersionWarnings = from.suppressVersionWarnings
     to.unrestrictedBuilderInference = from.unrestrictedBuilderInference
     to.useExperimental = from.useExperimental?.copyOf()

compiler/cli/cli-common/src/org/jetbrains/kotlin/cli/common/arguments/CommonCompilerArguments.kt

@@ -562,6 +562,18 @@ Use the 'warning' level to issue warnings instead of errors."""
             field = value
         }
 
+    // TODO(KT-56076): remove this argument after stdlib started to be built with 2.0
+    @Argument(
+        value = "-Xsuppress-api-version-greater-than-language-version-error",
+        description = "Suppress error about API version greater than language version.\n" +
+                "Warning: This is temporary solution (see KT-63712) intended to be used only for stdlib build."
+    )
+    var suppressApiVersionGreaterThanLanguageVersionError: Boolean = false
+        set(value) {
+            checkFrozen()
+            field = value
+        }
+
     @Argument(
         value = "-Xextended-compiler-checks",
         description = """Enable additional compiler checks that might provide verbose diagnostic information for certain errors.
@@ -911,10 +923,14 @@ The corresponding calls' declarations may not be marked with @BuilderInference."
         collector: MessageCollector
     ) {
         if (apiVersion > ApiVersion.createByLanguageVersion(languageVersion)) {
-            collector.report(
+            if (!suppressApiVersionGreaterThanLanguageVersionError) {
-                CompilerMessageSeverity.ERROR,
+                collector.report(
-                "-api-version (${apiVersion.versionString}) cannot be greater than -language-version (${languageVersion.versionString})"
+                    CompilerMessageSeverity.ERROR,
-            )
+                    "-api-version (${apiVersion.versionString}) cannot be greater than -language-version (${languageVersion.versionString})"
+                )
+            }
+        } else if (suppressApiVersionGreaterThanLanguageVersionError) {
+            collector.report(WARNING, "Useless suppress -Xsuppress-api-version-greater-than-language-version-error")
         }
     }
 

compiler/testData/cli/js/jsExtraHelp.out

@@ -132,6 +132,9 @@ where advanced options include:
   -Xself-upper-bound-inference Support inferring type arguments from the self-type upper bounds of the corresponding type parameters.
   -Xskip-metadata-version-check Allow loading classes with bad metadata versions and pre-release classes.
   -Xskip-prerelease-check    Allow loading pre-release classes.
+  -Xsuppress-api-version-greater-than-language-version-error
+                             Suppress error about API version greater than language version.
+                             Warning: This is temporary solution (see KT-63712) intended to be used only for stdlib build.
   -Xsuppress-version-warnings Suppress warnings about outdated, inconsistent, or experimental language or API versions.
   -Xunrestricted-builder-inference
                              Eliminate builder inference restrictions, for example by allowing type variables to be returned from builder inference calls.

compiler/testData/cli/jvm/apiVersionGreaterThanLanguageSuppress.args

@@ -0,0 +1,8 @@
+$TESTDATA_DIR$/apiVersionGreaterThanLanguageSuppress.kt
+-d
+$TEMP_DIR$
+-api-version
+2.0
+-language-version
+1.9
+-Xsuppress-api-version-greater-than-language-version-error

compiler/testData/cli/jvm/apiVersionGreaterThanLanguageSuppress.kt

@@ -0,0 +1,6 @@
+@SinceKotlin("2.0")
+fun new() {}
+
+fun useNew() {
+    new()
+}

compiler/testData/cli/jvm/apiVersionGreaterThanLanguageSuppress.out

@@ -0,0 +1 @@
+OK

compiler/testData/cli/jvm/apiVersionGreaterThanLanguageSuppressUseless.args

@@ -0,0 +1,8 @@
+$TESTDATA_DIR$/apiVersionGreaterThanLanguageSuppress.kt
+-d
+$TEMP_DIR$
+-api-version
+2.0
+-language-version
+2.0
+-Xsuppress-api-version-greater-than-language-version-error

compiler/testData/cli/jvm/apiVersionGreaterThanLanguageSuppressUseless.out

@@ -0,0 +1,2 @@
+warning: useless suppress -Xsuppress-api-version-greater-than-language-version-error
+OK

compiler/testData/cli/jvm/extraHelp.out

@@ -219,6 +219,9 @@ where advanced options include:
   -Xself-upper-bound-inference Support inferring type arguments from the self-type upper bounds of the corresponding type parameters.
   -Xskip-metadata-version-check Allow loading classes with bad metadata versions and pre-release classes.
   -Xskip-prerelease-check    Allow loading pre-release classes.
+  -Xsuppress-api-version-greater-than-language-version-error
+                             Suppress error about API version greater than language version.
+                             Warning: This is temporary solution (see KT-63712) intended to be used only for stdlib build.
   -Xsuppress-version-warnings Suppress warnings about outdated, inconsistent, or experimental language or API versions.
   -Xunrestricted-builder-inference
                              Eliminate builder inference restrictions, for example by allowing type variables to be returned from builder inference calls.

compiler/tests-gen/org/jetbrains/kotlin/cli/CliTestGenerated.java

@@ -215,6 +215,16 @@ public class CliTestGenerated extends AbstractCliTest {
             runTest("compiler/testData/cli/jvm/apiVersionGreaterThanLanguage.args");
         }
 
+        @TestMetadata("apiVersionGreaterThanLanguageSuppress.args")
+        public void testApiVersionGreaterThanLanguageSuppress() throws Exception {
+            runTest("compiler/testData/cli/jvm/apiVersionGreaterThanLanguageSuppress.args");
+        }
+
+        @TestMetadata("apiVersionGreaterThanLanguageSuppressUseless.args")
+        public void testApiVersionGreaterThanLanguageSuppressUseless() throws Exception {
+            runTest("compiler/testData/cli/jvm/apiVersionGreaterThanLanguageSuppressUseless.args");
+        }
+
         @TestMetadata("apiVersionInvalid.args")
         public void testApiVersionInvalid() throws Exception {
             runTest("compiler/testData/cli/jvm/apiVersionInvalid.args");