Parse the ODE rates so they can be compiled.
parse_ode_rates(
ode_rates,
param_codes,
const_codes,
tcovar_codes,
ode_comp_codes
)
character vector of ODE rates
named numeric vector of parameter codes
named numeric vector of constant codes
named numeric vector of time-varying covariate codes
named numeric vector of ODE compartment codes
string snippets for the ODE that can be compiled