[cfe-dev] How can I get the analysis information of UnaryOperator in Clang Static Analyzer

[Jordan Rose]

Hi, Arthur. Looks like we're forgetting in Core to give checkers a chance for some of the unary operators. I'll see if I can get to that soon; alternately, patches welcome!

Jordan


On Sep 24, 2013, at 1:15 , Arthur Yoo <phjy007 at gmail.com> wrote:

> Hi all,
> 
> It seems that the Clang Static Analyzer may miss the analysis information of UnaryOperator. For example:
> 
> void func(int s) {
> 
>     s++;
> 
>     ++s;
> 
> }
> 
> The example may be quite ridiculous…
> 
> My checker contains a method: void checkPostStmt(const Stmt *DS, CheckerContext &C).
> 
> I thought that it can capture any kind of Stmt.  Since UnaryOperator is a subclass of Expr and Expr is a subclass of Stmt, I thought my checker can give me the analysis information of "s++" and "++s". However, it returned nothing. 
> 
> What' more, I have tried to add another checkPostStmt() method in my checker. The declaration
> 
> of this method is void checkPostStmt(const UnaryOperator *Op, CheckerContext &C). The result is same with the previous one, it returned nothing.
> 
> In fact, I want to use Clang Static Analyzer to capture all kinds of UnaryOperator, including 's++/++s/s--/--'(IncrementOp/DecrementOp). *p(pointer dereference) and so on. So how can I get the analysis information of UnaryOperator in Clang Static Analyzer?
> 
> Thanks a lot.
> 
> 
> 
> -- 
> Best regards,
> Arthur Yoo
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