Introduce cast for <unsafe-coerce> calls

java/ql/lib/config/semmlecode.dbscheme

@@ -747,6 +747,7 @@ case @expr.kind of
 | 83  = @stringtemplateexpr
 | 84  = @varargexpr
 | 85  = @notnullexpr
+| 86  = @unsafecoerceexpr
 ;
 
 /** Holds if this `when` expression was written as an `if` expression. */

java/ql/lib/semmle/code/java/Expr.qll

@@ -1144,7 +1144,8 @@ class CastingExpr extends Expr {
     this instanceof @safecastexpr or
     this instanceof @implicitcastexpr or
     this instanceof @implicitnotnullexpr or
-    this instanceof @implicitcoerciontounitexpr
+    this instanceof @implicitcoerciontounitexpr or
+    this instanceof @unsafecoerceexpr
   }
 
   /** Gets the target type of this casting expression. */
@@ -1194,6 +1195,14 @@ class ImplicitCoercionToUnitExpr extends CastingExpr, @implicitcoerciontounitexp
   override string getAPrimaryQlClass() { result = "ImplicitCoercionToUnitExpr" }
 }
 
+/** An unsafe coerce expression. */
+class UnsafeCoerceExpr extends CastingExpr, @unsafecoerceexpr {
+  /** Gets a printable representation of this expression. */
+  override string toString() { result = "<unsafe coerce>" }
+
+  override string getAPrimaryQlClass() { result = "UnsafeCoerceExpr" }
+}
+
 /** A class instance creation expression. */
 class ClassInstanceExpr extends Expr, ConstructorCall, @classinstancexpr {
   /** Gets the number of arguments provided to the constructor of the class instance creation expression. */