[cfe-dev] get sizeof(*) 's value

John McCall rjmccall at apple.com
Mon Mar 25 13:04:56 PDT 2013

On Mar 25, 2013, at 1:50 AM, huc1985 <huc1985 at 163.com> wrote:
>    I'm using a RecursiveASTVisitor and its VisitCallExpr method. I want to
> find out all location using malloc. How to get the sizeof(*)'s value?
>    for example:
>     code:    
>          char* a = (char*)malloc(sizeof(char));   
>          int* b = (int*)malloc(sizeof(int));   
>     result:
>          a, fun:malloc, alloc size:1bytes
>          b, fun:malloc, alloc size:4bytes
>     I want to know somthing like this. 

Expr::EvaluateAsInt is the most general way.


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