internal void Clear()
{
Symbols.Clear();
CharacterSets.Clear();
Productions.Clear();
FAStates.Clear();
LRActionLists.Clear();
Groups.Clear();
}
/// <summary>
/// Clear all game data
/// </summary>
public static void ClearEvrething()
{
m_sEverything.Clear();
m_sUnparsed.Clear();
Productions.Clear();
}
public virtual CnfGrammar Load(string[] specs)
{
var splitter = new Regex("\\s+");
var binaries = new Dictionary <string, IList <CnfProduction> >();
Func <string, string> trim = s => s.Trim(new[] { '\t', ' ' });
Func <string, string[]> split = s => splitter.Split(s);
Productions.Clear();
for (var at = 0; at < specs.Length; at++)
{
var spec = specs[at];
string line;
if (!(line = trim(spec)).StartsWith("#"))
{
var separatorIndex = line.IndexOf("->");
bool arrow;
separatorIndex = (arrow = (separatorIndex > 0)) ? separatorIndex : line.IndexOf(":");
var sides =
separatorIndex > 0 ?
new[]
{
line.Substring(0, separatorIndex),
line.Substring(separatorIndex + (arrow ? 2 : 1))
}
:
null;
if (sides != null)
{
var lhs = trim(sides[0]);
var rhs = trim(sides[1]);
var commentMark = rhs.IndexOf('#');
rhs = trim(commentMark >= 0 ? rhs.Substring(0, commentMark) : rhs);
var normalizedRhs = split(rhs);
var isBinaryRhs = normalizedRhs.Length > 1;
var binLeft = normalizedRhs[0];
var binRight = isBinaryRhs ? normalizedRhs[1] : null;
var reduction = new CnfProduction(lhs, binLeft, binRight, at);
var binaryKey = isBinaryRhs ? string.Concat(binLeft, ' ', binRight) : null;
var reduceKey = ReductionKey(binaryKey ?? reduction.Rhs, lhs);
if (Productions.Count < 1)
{
Start = reduction;
}
Productions.Add(reduceKey, reduction);
if (binaryKey != null)
{
IList <CnfProduction> reductions;
if (!binaries.TryGetValue(binaryKey, out reductions))
{
binaries.Add(binaryKey, new List <CnfProduction>());
}
binaries[binaryKey].Add(reduction);
}
}
}
}
Binaries = binaries.Values.SelectMany(productions => productions).ToArray();
Lexicon =
new CnfLexicon
(
Productions.
Values.
Where(production => production.IsLexical).
OrderByDescending(production => !production.IsLiteral ? production.Pattern.Length : production.Literal.Length).
ToArray()
);
return(this);
}