[InlayParameterHints] show param name for this argument

java/java-impl/src/com/intellij/codeInsight/daemon/impl/ParameterNameHintsManager.java

@@ -59,7 +59,7 @@ public class ParameterNameHintsManager {
     myDescriptors = descriptors;
   }
 
-  static boolean isLiteralExpression(@Nullable PsiElement callArgument) {
+  static boolean isUnclearExpression(@Nullable PsiElement callArgument) {
     if (callArgument instanceof PsiLiteralExpression)
       return true;
 
@@ -70,6 +70,10 @@ public class ParameterNameHintsManager {
               || JavaTokenType.PLUS.equals(tokenType)) && expr.getOperand() instanceof PsiLiteralExpression;
     }
 
+    if (callArgument instanceof PsiThisExpression) {
+      return true;
+    }
+
     return false;
   }
 
@@ -150,7 +154,7 @@ public class ParameterNameHintsManager {
       return true;
     }
 
-    if (isLiteralExpression(argument)) {
+    if (isUnclearExpression(argument)) {
       PsiType parameterType = resolveResult.getSubstitutor().substitute(paramType);
       return TypeConversionUtil.isAssignable(parameterType, argType);
     }
@@ -166,7 +170,7 @@ public class ParameterNameHintsManager {
   private static boolean hasLiteralInVarargs(int index, PsiExpression[] callArguments) {
     for (int i = index; i < callArguments.length; i++) {
       PsiExpression arg = callArguments[i];
-      if (isLiteralExpression(arg)) return true;
+      if (isUnclearExpression(arg)) return true;
     }
     return false;
   }
@@ -178,7 +182,7 @@ public class ParameterNameHintsManager {
 
   private static boolean hasLiteralExpression(@NotNull PsiExpression[] arguments) {
     for (PsiExpression argument : arguments) {
-      if (isLiteralExpression(argument)) return true;
+      if (isUnclearExpression(argument)) return true;
     }
     return false;
   }

java/java-tests/testSrc/com/intellij/codeInsight/daemon/inlays/InlayParameterHintsTest.kt

@@ -424,6 +424,24 @@ public class VarArgTest {
     onLineStartingWith("check(")
         .assertInlays("beginIndex->10", "endIndex->1000", """x->"su"""" )
   }
+  
+  fun `test inline this`() {
+    setup("""
+public class VarArgTest {
+  
+  public void main() {
+    check(this, 1000);
+  }
+
+  public void check(VarArgTest test, int endIndex) {
+  }
+
+}
+""")
+    
+    onLineStartingWith("check(t")
+        .assertInlays("test->this", "endIndex->1000")
+  }
 
 
   private fun onLineStartingWith(text: String): InlayAssert {