internal static IDictionary <char, State> Merge(params IDictionary <char, State>[] states)
{
IDictionary <char, State> set = null;
for (int i = 0, ii = states.Length; i < ii; i++)
{
IDictionary <char, State> state = states[i];
if (state != null && state.Count > 0)
{
if (set == null)
{
set = state;
}
else
{
foreach (State s2 in state.Values)
{
State s1;
if (set.TryGetValue(s2.Char, out s1))
{
set[s2.Char] = CompositeState.Create(s1, s2);
}
else
{
set[s2.Char] = s2;
}
}
}
}
}
return(set);
}
public override bool Equals(object obj)
{
if (obj == this)
{
return(true);
}
CompositeState other = obj as CompositeState;
if (other == null)
{
return(false);
}
return(Enumerable.SequenceEqual(this.states, other.states));
}
public static State Create(State state1, State state2, State state3)
{
if (state1 != null)
{
if (state2 != null && state2 != state1)
{
return(state3 != null && state3 != state2 && state3 != state1 ?
new CompositeState(state1, state2, state3) :
new CompositeState(state1, state2));
}
else
{
return(CompositeState.Create(state1, state3));
}
}
else
{
return(CompositeState.Create(state2, state3));
}
}
/// <inheritdoc />
public override IDictionary <char, State> NextStates()
{
if (this.nextstates == null)
{
IDictionary <char, State> set = null;
IList <State> s = this.states;
for (int i = 0, ii = s.Count; i < ii; i++)
{
IDictionary <char, State> nextStates = s[i].NextStates();
if (set == null)
{
set = nextStates;
}
else
{
foreach (State s2 in nextStates.Values)
{
State s1;
if (set.TryGetValue(s2.Char, out s1))
{
set[s2.Char] = CompositeState.Create(s1, s2);
}
else
{
set[s2.Char] = s2;
}
}
}
}
this.nextstates = set;
}
return(this.nextstates);
}
public static State Create(State state1, State state2)
{
return(CompositeState.Create(state1, state2));
}