FIR: Fix another inconsistency with FE1.0 in synthetic properties resolution

analysis/low-level-api-fir/tests/org/jetbrains/kotlin/analysis/low/level/api/fir/diagnostic/compiler/based/DiagnosisCompilerTestFE10TestdataTestGenerated.java

@@ -29874,6 +29874,12 @@ public class DiagnosisCompilerTestFE10TestdataTestGenerated extends AbstractDiag
                     runTest("compiler/testData/diagnostics/tests/syntheticExtensions/javaProperties/KotlinOverridesJava5.kt");
                 }
 
+                @Test
+                @TestMetadata("nonAsciiSecondChar.kt")
+                public void testNonAsciiSecondChar() throws Exception {
+                    runTest("compiler/testData/diagnostics/tests/syntheticExtensions/javaProperties/nonAsciiSecondChar.kt");
+                }
+
                 @Test
                 @TestMetadata("OnlyAscii.kt")
                 public void testOnlyAscii() throws Exception {

compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirOldFrontendDiagnosticsTestGenerated.java

@@ -29874,6 +29874,12 @@ public class FirOldFrontendDiagnosticsTestGenerated extends AbstractFirDiagnosti
                     runTest("compiler/testData/diagnostics/tests/syntheticExtensions/javaProperties/KotlinOverridesJava5.kt");
                 }
 
+                @Test
+                @TestMetadata("nonAsciiSecondChar.kt")
+                public void testNonAsciiSecondChar() throws Exception {
+                    runTest("compiler/testData/diagnostics/tests/syntheticExtensions/javaProperties/nonAsciiSecondChar.kt");
+                }
+
                 @Test
                 @TestMetadata("OnlyAscii.kt")
                 public void testOnlyAscii() throws Exception {

compiler/fir/analysis-tests/tests-gen/org/jetbrains/kotlin/test/runners/FirOldFrontendDiagnosticsWithLightTreeTestGenerated.java

@@ -29874,6 +29874,12 @@ public class FirOldFrontendDiagnosticsWithLightTreeTestGenerated extends Abstrac
                     runTest("compiler/testData/diagnostics/tests/syntheticExtensions/javaProperties/KotlinOverridesJava5.kt");
                 }
 
+                @Test
+                @TestMetadata("nonAsciiSecondChar.kt")
+                public void testNonAsciiSecondChar() throws Exception {
+                    runTest("compiler/testData/diagnostics/tests/syntheticExtensions/javaProperties/nonAsciiSecondChar.kt");
+                }
+
                 @Test
                 @TestMetadata("OnlyAscii.kt")
                 public void testOnlyAscii() throws Exception {

compiler/fir/java/src/org/jetbrains/kotlin/fir/resolve/FirJavaSyntheticNamesProvider.kt

@@ -7,98 +7,14 @@ package org.jetbrains.kotlin.fir.resolve
 
 import org.jetbrains.kotlin.fir.NoMutableState
 import org.jetbrains.kotlin.fir.resolve.calls.FirSyntheticNamesProvider
+import org.jetbrains.kotlin.load.java.getPropertyNamesCandidatesByAccessorName
+import org.jetbrains.kotlin.load.java.possibleGetMethodNames
+import org.jetbrains.kotlin.load.java.setMethodName
 import org.jetbrains.kotlin.name.Name
-import org.jetbrains.kotlin.util.capitalizeDecapitalize.capitalizeAsciiOnly
-import org.jetbrains.kotlin.util.capitalizeDecapitalize.decapitalizeAsciiOnly
-import org.jetbrains.kotlin.util.capitalizeDecapitalize.toUpperCaseAsciiOnly
 
 @NoMutableState
 object FirJavaSyntheticNamesProvider : FirSyntheticNamesProvider() {
-    private const val GETTER_PREFIX = "get"
+    override fun possibleGetterNamesByPropertyName(name: Name): List<Name> = possibleGetMethodNames(name)
-    private const val SETTER_PREFIX = "set"
+    override fun setterNameByGetterName(name: Name): Name = setMethodName(getMethodName = name)
-    private const val IS_PREFIX = "is"
+    override fun possiblePropertyNamesByAccessorName(name: Name): List<Name> = getPropertyNamesCandidatesByAccessorName(name)
-
-    @Suppress("NOTHING_TO_INLINE")
-    private inline fun Char.isAsciiUpperCase() = this in 'A'..'Z'
-
-    @Suppress("NOTHING_TO_INLINE")
-    private inline fun Char.isAsciiLowerCase() = this in 'a'..'z'
-
-    override fun possibleGetterNamesByPropertyName(name: Name): List<Name> {
-        if (name.isSpecial) return emptyList()
-        val identifier = name.identifier
-        if (identifier.isEmpty()) return emptyList()
-        val firstChar = identifier[0]
-        if (!firstChar.isJavaIdentifierStart() || firstChar in 'A'..'Z') return emptyList()
-        val result = ArrayList<Name>(3)
-        val standardName = Name.identifier(GETTER_PREFIX + identifier.capitalizeAsciiOnly())
-        val length = identifier.length
-        if (length == 1) {
-            if (identifier[0].isAsciiLowerCase()) {
-                // 'x' --> 'getX' but not 'X' --> 'getX'
-                result += standardName
-            }
-        } else if (identifier[1].isAsciiLowerCase()) {
-            if (identifier[0].isAsciiLowerCase()) {
-                // 'something' --> 'getSomething' classic case
-                result += standardName
-            }
-            var secondWordStart = 2
-            while (secondWordStart < length && identifier[secondWordStart].isAsciiLowerCase()) {
-                secondWordStart++
-            }
-            val capitalizedFirstWordName = Name.identifier(
-                GETTER_PREFIX + identifier.substring(0, secondWordStart).toUpperCaseAsciiOnly() + identifier.substring(secondWordStart)
-            )
-            if (secondWordStart >= length || identifier[secondWordStart].isAsciiUpperCase()) {
-                // 'xyz' --> 'getXYZ' or 'xyzOfSomething' --> 'getXYZOfSomething'
-                result += capitalizedFirstWordName
-            }
-        } else if (length < 3 || !identifier[2].isAsciiUpperCase()) {
-            // 'xOfSomething' --> 'getXOfSomething' but not 'xYZ' --> 'getXYZ'
-            result += standardName
-        }
-        if (length > IS_PREFIX.length && identifier.startsWith(IS_PREFIX) && !identifier[IS_PREFIX.length].isAsciiLowerCase()) {
-            // 'isSomething' (but not 'is' or 'issomething')
-            result += name
-        }
-        return result
-    }
-
-    override fun setterNameByGetterName(name: Name): Name? {
-        val identifier = name.identifier
-        val prefix = when {
-            identifier.startsWith(GETTER_PREFIX) -> GETTER_PREFIX
-            identifier.startsWith(IS_PREFIX) -> IS_PREFIX
-            else -> return null
-        }
-        return Name.identifier(SETTER_PREFIX + identifier.removePrefix(prefix))
-    }
-
-    override fun getterNameBySetterName(name: Name): Name? {
-        val identifier = name.identifier
-        val prefix = when {
-            identifier.startsWith(SETTER_PREFIX) -> SETTER_PREFIX
-            else -> return null
-        }
-        return Name.identifier(GETTER_PREFIX + identifier.removePrefix(prefix))
-    }
-
-    override fun possiblePropertyNamesByAccessorName(name: Name): List<Name> {
-        if (name.isSpecial) return emptyList()
-        val identifier = name.identifier
-        val prefix = when {
-            identifier.startsWith(GETTER_PREFIX) -> GETTER_PREFIX
-            identifier.startsWith(IS_PREFIX) -> ""
-            identifier.startsWith(SETTER_PREFIX) -> SETTER_PREFIX
-            else -> return emptyList()
-        }
-        val withoutPrefix = identifier.removePrefix(prefix)
-        val withoutPrefixName = Name.identifier(withoutPrefix.decapitalizeAsciiOnly())
-        return if (prefix == SETTER_PREFIX) {
-            listOf(withoutPrefixName, Name.identifier(IS_PREFIX + withoutPrefix))
-        } else {
-            listOf(withoutPrefixName)
-        }
-    }
 }

compiler/fir/providers/src/org/jetbrains/kotlin/fir/resolve/calls/FirSyntheticNamesProvider.kt

@@ -11,8 +11,7 @@ import org.jetbrains.kotlin.name.Name
 
 abstract class FirSyntheticNamesProvider : FirSessionComponent {
     abstract fun possibleGetterNamesByPropertyName(name: Name): List<Name>
-    abstract fun setterNameByGetterName(name: Name): Name?
+    abstract fun setterNameByGetterName(name: Name): Name
-    abstract fun getterNameBySetterName(name: Name): Name?
     abstract fun possiblePropertyNamesByAccessorName(name: Name): List<Name>
 }
 

compiler/fir/providers/src/org/jetbrains/kotlin/fir/resolve/calls/Synthetics.kt

@@ -85,7 +85,6 @@ class FirSyntheticPropertiesScope(
         var matchingSetter: FirSimpleFunction? = null
         if (getterReturnType != null) {
             val setterName = syntheticNamesProvider.setterNameByGetterName(getterName)
-            if (setterName != null) {
             baseScope.processFunctionsByName(setterName, fun(setterSymbol: FirFunctionSymbol<*>) {
                 if (matchingSetter != null) return
                 val setter = setterSymbol.fir as? FirSimpleFunction ?: return
@@ -112,7 +111,6 @@ class FirSyntheticPropertiesScope(
                 matchingSetter = setter
             })
         }
-        }
 
         val classLookupTag = getterSymbol.originalOrSelf().dispatchReceiverClassOrNull()
         val packageName = classLookupTag?.classId?.packageFqName ?: getterSymbol.callableId.packageName

compiler/testData/diagnostics/tests/syntheticExtensions/javaProperties/nonAsciiSecondChar.kt

@@ -0,0 +1,11 @@
+// FIR_IDENTICAL
+// SKIP_TXT
+// FILE: A.java
+public class A {
+    public String getS4ClassRepresentation() { return ""; }
+}
+
+// FILE: main.kt
+fun foo(a: A) {
+    a.s4ClassRepresentation.length
+}

compiler/tests-common-new/tests-gen/org/jetbrains/kotlin/test/runners/DiagnosticTestGenerated.java

@@ -29970,6 +29970,12 @@ public class DiagnosticTestGenerated extends AbstractDiagnosticTest {
                     runTest("compiler/testData/diagnostics/tests/syntheticExtensions/javaProperties/KotlinOverridesJava5.kt");
                 }
 
+                @Test
+                @TestMetadata("nonAsciiSecondChar.kt")
+                public void testNonAsciiSecondChar() throws Exception {
+                    runTest("compiler/testData/diagnostics/tests/syntheticExtensions/javaProperties/nonAsciiSecondChar.kt");
+                }
+
                 @Test
                 @TestMetadata("OnlyAscii.kt")
                 public void testOnlyAscii() throws Exception {