Function is_ret_by_call

src/program/transform.rs:1579–1610

Is this arg returned by calls

(func: &str, arg_pos: usize, visitor: &Visitor)

    // Is this arg returned by calls
    pub fn is_ret_by_call(func: &str, arg_pos: usize, visitor: &Visitor) -> bool {
        if let Some(call) = visitor.find_callexpr(func, 0) {
            if let Clang::CallExpr(ce) = &call.kind {
                let call_args = ce.get_childs(call);
                if arg_pos >= call_args.len() {
                    return false;
                }
                let arg = ce.get_childs(call)[arg_pos];
                if crate::ast::utils::is_integer_literal(arg) {
                    return false;
                }
                if matches!(
                    &arg.kind,
                    Clang::CallExpr(_) | Clang::CXXNewExpr(_) | Clang::CXXMemberCallExpr
                ) {
                    return true;
                }

                if let Clang::DeclRefExpr(dre) = &arg.kind {
                    if let Some(init) = dre.get_var_init(visitor) {
                        if matches!(
                            &init.kind,
                            Clang::CallExpr(_) | Clang::CXXNewExpr(_) | Clang::CXXMemberCallExpr
                        ) {
                            return true;
                        }
                    }
                }
            }
        }
        false
    }
}

pub fn transform(