public void Scan()
{
while (this.CurrentPosition < this.m_input.Length)
{
bool foundMatch = false;
for (int i = 0; i < this.m_ruleTable.Count; i++)
{
LexRule <ScannerType, TokenType> rule = this.m_ruleTable[i];
if (!this.m_state.IsIn(rule.States))
{
continue;
}
if (!rule.PreCondition(this.m_scanner))
{
continue;
}
foundMatch = TryMatch(rule);
if (foundMatch && !rule.ContinueMatching)
{
break;
}
}
if (!foundMatch)
{
string msg = StringExtensions.Fi("Failed to find a matching rule while scanning text. The problem ocurred at "
+ "position {0}. The text in the vicinity was:\n{1}", this.CurrentPosition, this.CurrentVicinity);
throw (new AssertionViolationException(msg));
}
}
}
private bool TryMatch(LexRule <ScannerType, TokenType> rule)
{
Match m = rule.Regex.Match(this.Input, this.CurrentPosition);
if (m.Success)
{
if (rule.Token != null)
{
this.m_tokenQueue.Enqueue(new KeyValuePair <int, TokenType>(rule.TokenAsInt, rule.YYText(m, this.m_scanner)));
}
this.CurrentPosition += m.Length;
rule.Action(m, this.m_scanner);
return(true);
}
return(false);
}