Here is a list of all files with brief descriptions:

src
bandit
bandit.cpp
bandit.h
bandit_operator.cpp
bandit_operator.h
dummy.cpp
dummy.h
thompson.cpp
thompson.h
bindings
bind_dataset.cpp
bind_engines.cpp
bind_engines.h
bind_evaluator.cpp
bind_evaluator.h
bind_fitness.cpp
bind_individuals.cpp
bind_individuals.h
bind_params.cpp
bind_programs.cpp
bind_programs.h
bind_search_space.cpp
bind_selection.cpp
bind_selection.h
bind_variation.cpp
bind_variation.h
module.cpp
module.h
data
data.cpp
data.h
io.cpp
io.h
omop.cpp
omop.h
timeseries.cpp
timeseries.h
eval
evaluation.cpp
evaluation.h
metrics.cpp
metrics.h
scorer.h
ind
fitness.cpp
fitness.h
individual.cpp
individual.h
pop
archive.cpp
archive.h
population.cpp
population.h
program
optimizer
tiny_cost_function.h
weight_optimizer.h
dispatch_table.cpp
dispatch_table.h
functions.h
node.cpp
node.h
nodetype.cpp
nodetype.h
operator.h
program.h
signatures.h
split.cpp
split.h
tree_node.cpp
tree_node.h
selection
lexicase.cpp
lexicase.h
nsga2.cpp
nsga2.h
selection.cpp
selection.h
selection_operator.cpp
selection_operator.h
simplification
constants.cpp
constants.h
inexact.cpp
inexact.h
util
error.cpp
error.h
logger.cpp
logger.h
rnd.cpp
rnd.h
tuples.h
utils.cpp
utils.h
vary
search_space.cpp
search_space.h
variation.cpp
variation.h
engine.cpp
engine.h
init.h
params.h
types.h