internal override IEnumerable <TokenMatcherState> EnumerateMatches(TokenMatcherState state)
{
var nest = 0;
var last = state.Tokens.Count - 1;
for (var i = state.Index; i <= last; i++)
{
var t = state.Tokens[i];
if (t.IsOperatorOf("("))
{
nest++;
}
if (nest == 0)
{
if (t.IsOperatorOf(")") ||
t.IsOperatorOf(",") ||
t.IsOperatorOf(":") ||
t.IsKeywordOf("Then") ||
t.IsKeywordOf("To"))
{
last = i - 1;
break;
}
}
else
{
if (t.IsOperatorOf(")"))
{
nest--;
}
}
}
if (nest == 0 &&
state.Index <= last)
{
if (CaptureName != null)
{
if (!TryCreateExpression(state.Tokens, state.Index, last - state.Index + 1, out var e))
{
return(Enumerable.Empty <TokenMatcherState>());
}
state.Captures[CaptureName] = e;
}
state.Index = last + 1;
return(new[] { state });
}
return(Enumerable.Empty <TokenMatcherState>());
}
internal override IEnumerable <TokenMatcherState> EnumerateMatches(TokenMatcherState state)
{
var i = state.Index;
foreach (var s in _InternalItem.EnumerateMatches(state))
{
yield return(s);
}
state.Index = i;
if (_InternalItem.CaptureName != null)
{
state.Captures.Remove(_InternalItem.CaptureName);
}
yield return(state);
}
internal override IEnumerable <TokenMatcherState> EnumerateMatches(TokenMatcherState state)
{
var t = state.Tokens.ElementAtOrDefault(state.Index);
if (t != null &&
(_TypeMask == TokenType.Default || (_TypeMask & t.Type) != TokenType.Default) &&
_TextPattern?.IsMatch(t.Text) != false)
{
state.Index++;
if (CaptureName != null)
{
state.Captures[CaptureName] = _CaptureConversion == null ? t.Text : _CaptureConversion.DynamicInvoke(t);
}
yield return(state);
}
}
internal override IEnumerable <TokenMatcherState> EnumerateMatches(TokenMatcherState state)
{
var s = new TokenMatcherState(state.Tokens);
s.Index = state.Index;
var ens = new Stack <IEnumerator <TokenMatcherState> >();
var indexes = new Stack <int>();
indexes.Push(state.Index);
ens.Push(_Items[0].EnumerateMatches(s).GetEnumerator());
while (ens.Any())
{
var p = ens.Peek();
if (p.MoveNext())
{
if (ens.Count == _Items.Count)
{
state.Index = p.Current.Index;
foreach (var kv in p.Current.Captures)
{
state.Captures[kv.Key] = kv.Value;
}
if (CaptureName != null)
{
state.Captures[CaptureName] = _CaptureConversion == null ? p.Current : _CaptureConversion.DynamicInvoke(p.Current);
}
yield return(state);
}
else
{
indexes.Push(p.Current.Index);
ens.Push(_Items[ens.Count].EnumerateMatches(p.Current).GetEnumerator());
}
}
else
{
s.Index = indexes.Pop();
ens.Pop();
}
}
}
internal IEnumerable <TokenMatcherState> EnumerateMatches(IReadOnlyList <Token> tokens, int index)
{
var s = new TokenMatcherState(tokens)
{
Index = index
};
var ens = new Stack <IEnumerator <TokenMatcherState> >();
var indexes = new Stack <int>();
indexes.Push(s.Index);
ens.Push(_Items[0].EnumerateMatches(s).GetEnumerator());
while (ens.Any())
{
var p = ens.Peek();
if (p.MoveNext())
{
if (ens.Count == _Items.Count)
{
s.Index = p.Current.Index;
yield return(s);
}
else
{
indexes.Push(p.Current.Index);
ens.Push(_Items[ens.Count].EnumerateMatches(p.Current).GetEnumerator());
}
}
else
{
s.Index = indexes.Pop();
ens.Pop();
}
}
}
internal abstract IEnumerable <TokenMatcherState> EnumerateMatches(TokenMatcherState state);
internal override IEnumerable <TokenMatcherState> EnumerateMatches(TokenMatcherState state)
{
var ens = new Stack <IEnumerator <TokenMatcherState> >();
var states = new Stack <TokenMatcherState>();
var captures = new List <object>();
states.Push(state);
ens.Push(_InternalItem.EnumerateMatches(new TokenMatcherState(state.Tokens)
{
Index = state.Index
}).GetEnumerator());
while (ens.Any())
{
var p = ens.Peek();
if (p.MoveNext())
{
var cs = p.Current;
var cap = _InternalItem.CaptureName != null && cs.Captures.TryGetValue(_InternalItem.CaptureName, out var obj) ? obj : null;
captures.Add(cap);
if (captures.Count >= _Maximum)
{
state.Index = cs.Index;
if (CaptureName != null)
{
state.Captures[CaptureName] = captures;
}
yield return(state);
captures.RemoveAt(captures.Count - 1);
}
else
{
states.Push(cs);
ens.Push(_InternalItem.EnumerateMatches(new TokenMatcherState(state.Tokens)
{
Index = cs.Index
}).GetEnumerator());
}
}
else
{
var cs = states.Pop();
ens.Pop();
if (_Minimum <= captures.Count && captures.Count <= _Maximum)
{
state.Index = cs.Index;
if (CaptureName != null)
{
state.Captures[CaptureName] = captures;
}
yield return(state);
if (captures.Any())
{
captures.RemoveAt(captures.Count - 1);
}
}
}
}
}
