RedundantCastUtil: report safe widening primitive casts

Fixes IDEA-154832 IDEA add unnecessary cast to double on method inline

GitOrigin-RevId: 1e8dbd1466f74bdab9584a860f4e188b025fba1c

java/java-tests/testData/inspection/redundantCast/generics/PrimitiveWidening.java

@@ -0,0 +1,18 @@
+import org.jetbrains.annotations.*;
+
+class A {
+  double widen(int x) {
+    return (<warning descr="Casting 'x' to 'double' is redundant">double</warning>) x;
+  }
+  
+  double widenDataLoss(long x) {
+    return (double) x;
+  }
+  
+  void call(short a, byte b, long c) {
+    widen((<warning descr="Casting 'a' to 'int' is redundant">int</warning>)a);
+    widen((<warning descr="Casting 'b' to 'int' is redundant">int</warning>)b);
+    widen((int)c);
+  }
+  
+}

java/java-tests/testData/refactoring/inlineMethod/WidenArgument.java

@@ -0,0 +1,12 @@
+class UnnecessaryDoubleCast {
+  public void check() {
+    <caret>eq(25, 25.49);
+  }
+
+  private static void eq(double expected, double actual) {
+    assertDoubleEquals(expected, actual);
+  }
+
+  public static void assertDoubleEquals(double v, double v2) {
+  }
+}

java/java-tests/testData/refactoring/inlineMethod/WidenArgument.java.after

@@ -0,0 +1,8 @@
+class UnnecessaryDoubleCast {
+  public void check() {
+      assertDoubleEquals(25, 25.49);
+  }
+
+    public static void assertDoubleEquals(double v, double v2) {
+  }
+}