Method rfree

chapter23/src/main/java/com/seaofnodes/simple/type/Type.java:405–412

()

    // Recursively free type and children
    final void rfree() {
        if( isFree() ) return;
        int nkids = nkids();
        for( int i=0; i<nkids; i++ )
            if( !at(i)._terned )
                at(i).rfree();
        free(this);
    }

    Type free(Type free) { return this; }
    boolean isFree() { return false; }