private void readFile(string filename)
{
string json = File.ReadAllText(filename);
Rules.AddRange(Rule.FromJson(json));
List <Symbol> temp = new List <Symbol>();
// 找出所有的符号
foreach (var rule in Rules)
{
temp.Add(rule.Left);
temp.AddRange(rule.Right);
}
Symbols.AddRange(temp.Distinct().ToList());
foreach (var sym in Symbols)
{
if (sym.Type == "N")
{
N_Symbols.Add(sym);
}
if (sym.Type == "V")
{
V_Symbols.Add(sym);
}
}
Symbols.Add(D);
}
private async Task GetSymbols()
{
IsLoadingSymbols = true;
try
{
var results = await ExchangeService.GetSymbolsAsync(userAccount.Exchange, new CancellationToken()).ConfigureAwait(true);
Func <Symbol, string, Symbol> f = ((s, p) =>
{
s.IsFavourite = true;
return(s);
});
(from s in results join p in userAccount.Preferences.FavouriteSymbols on s.ExchangeSymbol equals p select f(s, p)).ToList();
Symbols.Clear();
Symbols.AddRange(results);
}
catch (Exception ex)
{
Logger.Log(ex.ToString(), Category.Exception, Priority.Low);
Dialog.ShowException(ex);
}
finally
{
IsLoadingSymbols = false;
}
}
public Grammar(Grammar grammar)
{
foreach (var rule in grammar.Rules)
{
Rules.Add(new Rule(rule));
}
Symbols.AddRange(grammar.Symbols);
}
public Rule(string name, params Symbol[] symbols)
{
Name = name;
Symbols.AddRange(symbols);
}
public SymbolOverload(params IMemberDefinition[] members)
: this()
{
Symbols.AddRange(members.Select(x => new SymbolDefinition(x)));
}
public SymbolOverload(params SymbolDefinition[] members)
: this()
{
Symbols.AddRange(members);
}
public Word(List <ISymbol> word)
{
Symbols.AddRange(word);
word.ForEach(x => stringWord += x.Character);
}
public void Add(List <Symbol> symbols)
{
Symbols.AddRange(symbols);
}
// generates the rule logic inside the method body
private string GenerateProductionRuleCode(Rules rules, int index, int indent)
{
Rule r = rules[index];
Symbols firsts = null;
Symbols firstsExtended = null;
StringBuilder sb = new StringBuilder();
string Indent = IndentTabs(indent);
switch (r.Type)
{
case RuleType.Terminal:
// expecting terminal, so scan it.
sb.AppendLine(Indent + "tok = scanner.Scan(TokenType." + r.Symbol.Name + ");" + Helper.AddComment("Terminal Rule: " + r.Symbol.Name));
sb.AppendLine(Indent + "n = node.CreateNode(tok, tok.ToString() );");
sb.AppendLine(Indent + "node.Token.UpdateRange(tok);");
sb.AppendLine(Indent + "node.Nodes.Add(n);");
sb.AppendLine(Indent + "if (tok.Type != TokenType." + r.Symbol.Name + ") {");
sb.AppendLine(Indent + IndentString + "tree.Errors.Add(new ParseError(\"Unexpected token '\" + tok.Text.Replace(\"\\n\", \"\") + \"' found. Expected \" + TokenType." + r.Symbol.Name + ".ToString(), 0x1001, tok));");
sb.AppendLine(Indent + IndentString + "return;");
sb.AppendLine(Indent + "}");
break;
case RuleType.NonTerminal:
sb.AppendLine(Indent + "Parse" + r.Symbol.Name + "(node);" + Helper.AddComment("NonTerminal Rule: " + r.Symbol.Name));
break;
case RuleType.Concat:
for (int i = 0; i < r.Rules.Count; i++)
{
sb.AppendLine();
sb.AppendLine(Indent + Helper.AddComment("Concat Rule"));
sb.Append(GenerateProductionRuleCode(r.Rules, i, indent));
}
break;
case RuleType.ZeroOrMore:
firsts = r.GetFirstTerminals();
firstsExtended = CollectExpectedTokens(rules, index + 1);
firstsExtended.AddRange(firsts);
sb.Append(Indent + "tok = scanner.LookAhead(");
AppendTokenList(firsts, sb);
sb.AppendLine(");" + Helper.AddComment("ZeroOrMore Rule"));
sb.Append(Indent + "while (");
AppendTokenCondition(firsts, sb, Indent);
sb.AppendLine(")");
sb.AppendLine(Indent + "{");
for (int i = 0; i < r.Rules.Count; i++)
{
sb.Append(GenerateProductionRuleCode(r.Rules, i, indent + 1));
}
sb.Append(Indent + "tok = scanner.LookAhead(");
AppendTokenList(firstsExtended, sb);
sb.AppendLine(");" + Helper.AddComment("ZeroOrMore Rule"));
sb.AppendLine(Indent + "}");
break;
case RuleType.OneOrMore:
sb.AppendLine(Indent + "found = false;");
sb.AppendLine(Indent + "do {" + Helper.AddComment("OneOrMore Rule"));
for (int i = 0; i < r.Rules.Count; i++)
{
sb.Append(GenerateProductionRuleCode(r.Rules, i, indent + 1));
}
firsts = r.GetFirstTerminals();
firstsExtended = CollectExpectedTokens(rules, index + 1);
firstsExtended.AddRange(firsts);
sb.AppendLine(Indent + IndentString + "if(!found) {");
sb.Append(Indent + IndentString + IndentString + "tok = scanner.LookAhead(");
AppendTokenList(firsts, sb);
sb.AppendLine(");" + Helper.AddComment("OneOrMore Rule"));
sb.AppendLine(Indent + IndentString + "found = true;");
sb.AppendLine(Indent + IndentString + "} else {");
sb.Append(Indent + IndentString + IndentString + "tok = scanner.LookAhead(");
AppendTokenList(firstsExtended, sb);
sb.AppendLine(");" + Helper.AddComment("OneOrMore Rule"));
sb.AppendLine(Indent + IndentString + "}");
sb.Append(Indent + "} while (");
AppendTokenCondition(firsts, sb, Indent);
sb.AppendLine(");" + Helper.AddComment("OneOrMore Rule"));
break;
case RuleType.Option:
firsts = r.GetFirstTerminals();
sb.Append(Indent + "tok = scanner.LookAhead(");
AppendTokenList(firsts, sb);
sb.AppendLine(");" + Helper.AddComment("Option Rule"));
sb.Append(Indent + "if (");
AppendTokenCondition(firsts, sb, Indent);
sb.AppendLine(")");
sb.AppendLine(Indent + "{");
for (int i = 0; i < r.Rules.Count; i++)
{
sb.Append(GenerateProductionRuleCode(r.Rules, i, indent + 1));
}
sb.AppendLine(Indent + "}");
break;
case RuleType.Choice:
firsts = r.GetFirstTerminals();
sb.Append(Indent + "tok = scanner.LookAhead(");
var tokens = new List <string>();
AppendTokenList(firsts, sb, tokens);
string expectedTokens;
if (tokens.Count == 1)
{
expectedTokens = tokens[0];
}
else if (tokens.Count == 2)
{
expectedTokens = tokens[0] + " or " + tokens[1];
}
else
{
expectedTokens = string.Join(", ", tokens.GetRange(0, tokens.Count - 1).ToArray());
expectedTokens += ", or " + tokens[tokens.Count - 1];
}
sb.AppendLine(");" + Helper.AddComment("Choice Rule"));
sb.AppendLine(Indent + "switch (tok.Type)");
sb.AppendLine(Indent + "{" + Helper.AddComment("Choice Rule"));
for (int i = 0; i < r.Rules.Count; i++)
{
foreach (TerminalSymbol s in r.Rules[i].GetFirstTerminals())
{
sb.AppendLine(Indent + IndentString + "case TokenType." + s.Name + ":");
}
sb.Append(GenerateProductionRuleCode(r.Rules, i, indent + 2));
sb.AppendLine(Indent + IndentString + IndentString + "break;");
}
sb.AppendLine(Indent + IndentString + "default:");
sb.AppendLine(Indent + IndentString + IndentString + "tree.Errors.Add(new ParseError(\"Unexpected token '\" + tok.Text.Replace(\"\\n\", \"\") + \"' found. Expected " + expectedTokens + ".\", 0x0002, tok));");
sb.AppendLine(Indent + IndentString + IndentString + "break;");
sb.AppendLine(Indent + "}" + Helper.AddComment("Choice Rule"));
break;
default:
break;
}
return(sb.ToString());
}
