'only' constructors with TwiceDifferentiableHv #109
Merged
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This is in view of JuliaNLSolvers/Optim.jl#738 @pkofod
only_fg_and_hvfor a constructor where only these two things are providedonly_fghvfor a constructor that looks likeonly_fghand allows re-using computations for the construction ofHv(a common trick using the construction of the gradient to getHv, see issue quoted above).This may break Optim in that the call tofgis now the "standard" format used elsewhere IE:(f, g, x)instead of just(g, x); I'll open a PR for Optim soon too.PS: failure on nightly are due to the project toml not being up to date, see PR #108Edit marked as "do not merge" for now, the ambiguity of calling convention fornow ok, see also JuliaNLSolvers/Optim.jl#742fgeither with (g, x) or (f, g, x) is causing me some trouble