예제 #1
0
  @Override
  public void endVisit(CastExpression node) {
    ITypeBinding type = node.getType().getTypeBinding();
    Expression expr = node.getExpression();
    ITypeBinding exprType = expr.getTypeBinding();

    // TODO(kirbs): Implement correct conversion of Java 8 intersection types to Objective-C.
    if (node.getType().isIntersectionType() && !Options.isJava8Translator()) {
      // Technically we can't currently get here, but as we add support and change flags in the
      // future this should alert us to implement intersection types.
      assert false : "not implemented yet";
    }

    if (BindingUtil.isFloatingPoint(exprType)) {
      assert type.isPrimitive(); // Java wouldn't allow a cast from primitive to non-primitive.
      switch (type.getBinaryName().charAt(0)) {
        case 'J':
          node.replaceWith(rewriteFloatToIntegralCast(type, expr, "JreFpToLong", type));
          return;
        case 'C':
          node.replaceWith(rewriteFloatToIntegralCast(type, expr, "JreFpToChar", type));
          return;
        case 'B':
        case 'S':
        case 'I':
          node.replaceWith(
              rewriteFloatToIntegralCast(type, expr, "JreFpToInt", typeEnv.resolveJavaType("int")));
          return;
      }
      // else fall-through.
    }

    // Lean on Java's type-checking.
    if (!type.isPrimitive() && exprType.isAssignmentCompatible(type.getErasure())) {
      node.replaceWith(TreeUtil.remove(expr));
      return;
    }

    FunctionInvocation castCheck = createCastCheck(type, expr);
    if (castCheck != null) {
      node.setExpression(castCheck);
    }
  }
예제 #2
0
 private void addCast(Expression expr) {
   ITypeBinding exprType = typeEnv.mapType(expr.getTypeBinding());
   CastExpression castExpr = new CastExpression(exprType, null);
   expr.replaceWith(ParenthesizedExpression.parenthesize(castExpr));
   castExpr.setExpression(expr);
 }