TODO add_dim is NOT SAME as dim.print_profile(oss)

* * \brief Add another timestep by reading in the variable x * * \param x Input variable * * \return The hidden representation of the d

Adds input with given children at position id.

Adds another timestep, with arbitrary recurrent connection.

returns the list of state pairs (stateF, stateB) obtained by adding inputs to both forward (stateF) and backward (stateB) RNNs.

returns the list of states obtained by adding the given inputs to the current state, one by one.

compute a composed representation of a word out of characters wordid should be a unique index for each word *type* in the graph being built