Method preVisit

src/ast/ast_derive_alias.cpp:333–336

        }
    protected:
        virtual void preVisit ( ExprCopy * expr ) override {
            Visitor::preVisit(expr);
            cmresDest[expr->right] = expr->left;
        }
        virtual void preVisit ( ExprMove * expr ) override {
            Visitor::preVisit(expr);
            cmresDest[expr->right] = expr->left;