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Constraint Programming Solver
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lib/solver/variables/api_impl.ex
alias CPSolver.Variable.Interface
alias CPSolver.Variable
alias CPSolver.Variable.View
defimpl Interface, for: Variable do
def id(var), do: var.id
def variable(var), do: var
def bind(var, store), do: Map.put(var, :store, store)
def map(_var, value), do: value
def domain(var), do: Variable.domain(var)
def size(var), do: Variable.size(var)
def min(var), do: Variable.min(var)
def max(var), do: Variable.max(var)
def fixed?(var), do: Variable.fixed?(var)
def contains?(var, val), do: Variable.contains?(var, val)
def remove(var, val), do: Variable.remove(var, val)
def removeAbove(var, val), do: Variable.removeAbove(var, val)
def removeBelow(var, val), do: Variable.removeBelow(var, val)
def fix(var, val), do: Variable.fix(var, val)
end
defimpl Interface, for: View do
def id(view), do: view.variable.id
def variable(view), do: view.variable
def bind(%{variable: variable} = view, store) do
variable
|> Map.put(:store, store)
|> then(fn bound_var -> Map.put(view, :variable, bound_var) end)
end
def map(view, value), do: view.mapper.(value)
def domain(view), do: View.domain(view)
def size(view), do: View.size(view)
def min(view), do: View.min(view)
def max(view), do: View.max(view)
def fixed?(view), do: View.fixed?(view)
def contains?(view, val), do: View.contains?(view, val)
def remove(view, val), do: View.remove(view, val)
def removeAbove(view, val), do: View.removeAbove(view, val)
def removeBelow(view, val), do: View.removeBelow(view, val)
def fix(view, val), do: View.fix(view, val)
end
defimpl Interface, for: Any do
def variable(_any), do: nil
def id(var), do: not_supported(:id, var)
def bind(var, _store), do: var
def map(var, _value), do: var
def domain(var), do: not_supported(:domain, var)
def size(var), do: not_supported(:size, var)
def min(var), do: not_supported(:min, var)
def max(var), do: not_supported(:max, var)
def fixed?(var), do: not_supported(:fixed?, var)
def contains?(var, _val), do: not_supported(:contains, var)
def remove(var, _val), do: not_supported(:remove, var)
def removeAbove(var, _val), do: not_supported(:removeAbove, var)
def removeBelow(var, _val), do: not_supported(:removeBelow, var)
def fix(var, _val), do: not_supported(:fix, var)
defp not_supported(var, op) do
throw({:operation_not_supported, op, for: var})
end
end
defmodule CPSolver.Variable.Interface.ThrowIfFails do
alias CPSolver.Variable.Interface
@behaviour Interface
defdelegate id(var), to: Interface
defdelegate variable(var), to: Interface
defdelegate bind(var, store), to: Interface
defdelegate map(var, value), to: Interface
def domain(var), do: handle_fail(Interface.domain(var), var)
def size(var), do: handle_fail(Interface.size(var), var)
def min(var), do: handle_fail(Interface.min(var), var)
def max(var), do: handle_fail(Interface.max(var), var)
def fixed?(var), do: handle_fail(Interface.fixed?(var), var)
def contains?(var, val), do: handle_fail(Interface.contains?(var, val), var)
def remove(var, val), do: handle_fail(Interface.remove(var, val), var)
def removeAbove(var, val), do: handle_fail(Interface.removeAbove(var, val), var)
def removeBelow(var, val), do: handle_fail(Interface.removeBelow(var, val), var)
def fix(var, val), do: handle_fail(Interface.fix(var, val), var)
defp handle_fail(:fail, _var), do: throw(:fail)
defp handle_fail(result, _var), do: result
end