public static IValue ParseValue(string text, int sectionCharIndex, ParsingStatus status)
{
if (!IsLocalSymbol(text))
{
return(null);
}
char localSymbolChar = text[0];
SymbolBase symbol = status.Symbols[new string(localSymbolChar, 1)];
if (symbol == null)
{
symbol = new LocalSymbol(localSymbolChar - '0');
status.Symbols.Add(symbol);
}
if (!(symbol is LocalSymbol))
{
status.ReportParsingError(sectionCharIndex, 1, "non-local symbol named " + localSymbolChar + " already defined, unable to refer to it");
return(symbol);
}
if (IsDefinitionChar(text[1]))
{
status.ReportParsingError(sectionCharIndex + 1, 1, "local symbol definition found where reference was expected");
return(symbol);
}
return(new Reference((LocalSymbol)symbol, IsForwardReferenceChar(text[1]) ? Reference.Directions.Forwards : Reference.Directions.Backwards));
}
public static SymbolBase ParseDefinition(string text, int sectionCharIndex, ParsingStatus status)
{
if (!IsLocalSymbol(text))
{
return(null);
}
if (!IsDefinitionChar(text[1]))
{
status.ReportParsingError(sectionCharIndex + 1, 1, "local symbol reference found where definition was expected");
}
char localSymbolChar = text[0];
SymbolBase symbol = status.Symbols[localSymbolChar.ToString()];
if (symbol == null)
{
return(new LocalSymbol(localSymbolChar - '0'));
}
if (!(symbol is LocalSymbol))
{
status.ReportParsingError(sectionCharIndex, 1, "non-local symbol named " + localSymbolChar + " already defined");
}
return(symbol);
}
public static IValue ParseValue(string text, int sectionCharIndex, ParsingStatus status)
{
var symbolValue = LocalSymbol.ParseValue(text, sectionCharIndex, status);
if (symbolValue != null)
{
return(symbolValue);
}
if (!IsValueSymbolName(text))
{
return(null);
}
SymbolBase symbol = status.Symbols[text];
if (symbol == null)
{
symbol = new ValueSymbol(text);
status.Symbols.Add(symbol);
}
return(symbol);
}