protected static void ParseSymbol(ref Grammar.Grammar grammar, string line)
{
string backup = line;
LiteralGrammarElement SymbolKeyword = new LiteralGrammarElement("Symbol ");
if (SymbolKeyword.Validate(ref line, true).Result)
{
line = line.Trim();
string templine = line;
SymbolSet AlphabetWithSpace = SymbolSet.FromType(SymbolSetPredefinedType.AlphaNumeric);
AlphabetWithSpace.Add(new Symbol('_'));
AlphabetWithSpace.Add(new Symbol('$'));
VariableLengthGrammarElement SymbolName = new VariableLengthGrammarElement(VariableLengthGrammarElementType.Plus, AlphabetWithSpace);
if (SymbolName.Validate(ref line, true).Result)
{
string name = templine.Substring(0, ((line.Length != 0)?templine.IndexOf(line):templine.Length)).Trim();
line = line.Trim();
LiteralGrammarElement EqualsSign = new LiteralGrammarElement("=");
if (EqualsSign.Validate(ref line, true).Result)
{
line = line.Trim();
try
{
Symbol symbol = new Symbol(GetSymbolValue(line));
grammar.AddSymbol(name, symbol);
}
catch (InfinityGrammarScriptParseError ie)
{
throw new InfinityGrammarScriptParseError("Illegal argument specified as symbol, (enclose in ' ' or \" \")", backup, ie);
}
}
else
{
throw new InfinityGrammarScriptParseError("Syntax requires a symbol value assignment, which is missing", backup);
}
}
else
{
throw new InfinityGrammarScriptParseError("The Symbol name specified was not valid. Names given can have Letters, Numbers and $ and _ (underscore)", backup);
}
}
else
{
throw new InfinityGrammarScriptParseError("Not a Symbol definition", backup);
}
}
protected static void ParseSymbolRange(ref Grammar.Grammar grammar, string line)
{
string backup = line;
LiteralGrammarElement SymbolRangeKeyword = new LiteralGrammarElement("SymbolRange ");
if (SymbolRangeKeyword.Validate(ref line, true).Result)
{
line = line.Trim();
string templine = line;
SymbolSet AlphabetWithSpace = SymbolSet.FromType(SymbolSetPredefinedType.AlphaNumeric);
AlphabetWithSpace.Add(new Symbol('_'));
AlphabetWithSpace.Add(new Symbol('$'));
VariableLengthGrammarElement SymbolName = new VariableLengthGrammarElement(VariableLengthGrammarElementType.Plus, AlphabetWithSpace);
if (SymbolName.Validate(ref line, true).Result)
{
string name = templine.Substring(0, templine.IndexOf(line)).Trim();
line = line.Trim();
LiteralGrammarElement EqualsSign = new LiteralGrammarElement("=");
if (EqualsSign.Validate(ref line, true).Result)
{
line = line.Trim();
string templine2 = line;
LiteralGrammarElement FromKeyword = new LiteralGrammarElement("From ");
LiteralGrammarElement FromStrKeyword = new LiteralGrammarElement("FromStr ");
if (FromKeyword.Validate(ref line, true).Result)
{
line = line.Trim();
string from = line.Substring(0, line.IndexOf("To") - 1).Trim();
string to = line.Substring(line.IndexOf("To") + 2, line.Length - line.IndexOf("To") - 2).Trim();
from = GetSymbolValue(from);
to = GetSymbolValue(to);
Console.WriteLine(from + " to " + to);
SymbolRange sr = new SymbolRange(from, to);
grammar.AddSymbol(name, sr);
}
else if (FromStrKeyword.Validate(ref line, true).Result)
{
line = line.Trim();
string from = line.Substring(0, line.IndexOf("To") - 1).Trim();
string to = line.Substring(line.IndexOf("To") + 2, line.Length - line.IndexOf("To") - 2).Trim();
from = GetSymbolValue(from);
to = GetSymbolValue(to);
Console.WriteLine(from + " to " + to);
SymbolRange sr = new SymbolRange(from, to);
grammar.AddSymbol(name, sr);
}
else
{
throw new InfinityGrammarScriptParseError("From ranges specified by wrong keyword or syntax error.", backup);
}
}
else
{
throw new InfinityGrammarScriptParseError("Syntax requires a symbol value assignment, which is missing.", backup);
}
}
else
{
throw new InfinityGrammarScriptParseError("The Symbol name specified was not valid. Names given can have Letters, Numbers and $ and _.", backup);
}
}
else
{
throw new InfinityGrammarScriptParseError("Not a valid SymbolRange definition.", backup);
}
}
