Here is a list of all files with brief descriptions:

cached-function.hh
cached-function.hxx
constant-function.cc
constant-function.hh
core.hh
include/roboptim/core/debug.hh
src/debug.hh
derivable-function.hh
derivable-parametrized-function.hh
derivative-size.hh
differentiable-function.hh
differentiable-function.hxx
doc.hh
dummy-laststate.cc
dummy-laststate.hh
dummy.cc
dummy.hh
finite-difference-gradient.cc
finite-difference-gradient.hh
finite-difference-gradient.hxx
function.cc
function.hh
fwd.hh
visualization/fwd.hh
generic-solver.cc
generic-solver.hh
gnuplot-commands.cc
gnuplot-commands.hh
gnuplot-differentiable-function.hh
gnuplot-function.hh
gnuplot.cc
gnuplot.hh
identity-function.cc
identity-function.hh
indent.cc
indent.hh
io.hh
linear-function.hh
linear-function.hxx
n-times-derivable-function.hh
n-times-derivable-function.hxx
numeric-linear-function.hh
numeric-linear-function.hxx
numeric-quadratic-function.cc
numeric-quadratic-function.hh
parametrized-function.hh
parametrized-function.hxx
portability.hh
problem.hh
problem.hxx
quadratic-function.hh
quadratic-function.hxx
result-with-warnings.cc
result-with-warnings.hh
result.cc
result.hh
solver-error.cc
solver-error.hh
solver-factory.hh
solver-factory.hxx
solver-warning.cc
solver-warning.hh
solver.cc
solver.hh
solver.hxx
split.hh
split.hxx
sum-of-c1-squares.cc
sum-of-c1-squares.hh
sys.hh
terminal-color.hh
twice-derivable-function.hh
twice-differentiable-function.hh
twice-differentiable-function.hxx
util.cc
util.hh
util.hxx