Method preVisit

src/ast/ast_lint.cpp:485–488

            for ( auto & arg : td->argTypes ) lintType(arg);
        }
        virtual void preVisit ( TypeDecl * td ) override {
            Visitor::preVisit(td);
            lintType(td);
        }
        virtual void preVisitAlias ( TypeDecl * td, const string & name ) override {
            Visitor::preVisitAlias(td,name);
            if ( !td->isAuto() ) {