Update NLSMeta

Author: amontoison

src/nls/meta.jl

@@ -15,6 +15,11 @@ The following keyword arguments are accepted:
 - `nnzj`: number of elements needed to store the nonzeros of the Jacobian of the residual
 - `nnzh`: number of elements needed to store the nonzeros of the sum of Hessians of the residuals
 - `lin`: indices of linear residuals
+- `jacobian_residual_available`: indicates whether the sparse Jacobian of the residuals is available
+- `hessian_residual_available`: indicates whether the sum of the sparse Hessians of the residuals is available
+- `Jv_residual_available`: indicates whether the Jacobian-vector product for the residuals is available
+- `Jtv_residual_available`: indicates whether the transpose Jacobian-vector product for the residuals is available
+- `Hv_residual_available`: indicates whether the sum of Hessian-vector product for the residuals is available
 
 `NLSMeta` also contains the following attributes, which are computed from the variables above:
 - `nequ`: size of the residual
@@ -35,13 +40,24 @@ struct NLSMeta{T, S}
   lin::Vector{Int} # List of linear residuals
   nlin::Int # = length(lin)
 
+  jacobian_residual_available::Bool
+  hessian_residual_available::Bool
+  Jv_residual_available::Bool
+  Jtv_residual_available::Bool
+  Hv_residual_available::Bool
+
   function NLSMeta{T, S}(
     nequ::Int,
     nvar::Int;
     x0::S = fill!(S(undef, nvar), zero(T)),
     nnzj = nequ * nvar,
     nnzh = div(nvar * (nvar + 1), 2),
     lin = Int[],
+    jacobian_residual_available::Bool = true
+    hessian_residual_available::Bool = true
+    Jv_residual_available::Bool = true
+    Jtv_residual_available::Bool = true
+    Hv_residual_available::Bool = true
   ) where {T, S}
     nnzj = max(0, nnzj)
     nnzh = max(0, nnzh)
@@ -50,7 +66,9 @@ struct NLSMeta{T, S}
     nlin = length(lin)
     nnln = length(nln)
 
-    return new{T, S}(nequ, nvar, x0, nnzj, nnzh, nln, nnln, lin, nlin)
+    return new{T, S}(nequ, nvar, x0, nnzj, nnzh, nln, nnln, lin, nlin,
+                     jacobian_residual_available, hessian_residual_available, Jv_residual_available,
+                     Jtv_residual_available, Hv_residual_available)
   end
 end