/// <summary>
/// Processes the rule name reference.
/// Depending on the current parser walker context this can be:
/// 1) new rule definition;
/// 2) reference to an existing rule from excluded global rules list;
/// 3) reference to an existing rule from the rule body.
/// </summary>
/// <param name="match">Current parse tree node</param>
private void EnterRuleName(ITextParseTreeNode match)
{
var ruleName = match.GetImage();
if (match.Parent.RuleName == ExtGrammarRules.Rule)
{
rules.Add(new RuleInfo {
Name = ruleName
});
output.Write("{0}Rule", ruleName);
}
else
{
referencedRules.Add(ruleName);
if (match.Parent.RuleName == ExtGrammarRules.ExcludedGlobalRules)
{
excludedGlobalRules.Add(ruleName);
}
else
{
ruleBodyExpression.AddChild(new RuleExpression(ruleName));
}
}
}
/// <summary>
/// Writes rule name with additional information (like string literal or character range)
/// to the output and enters all the matched children rules.
/// </summary>
/// <param name="match">Match of the text parser rule</param>
protected override void WriteMatch(ITextParseTreeNode match)
{
if (match.RuleName == ExtGrammarRules.RuleName)
{
Write(match.RuleName + " (" + match.GetImage() + ")");
}
else if (match.RuleName == ExtGrammarRules.LiteralValue ||
match.RuleName == ExtGrammarRules.CharacterRange)
{
Write(match.RuleName + " " + match.GetImage());
}
else
{
base.WriteMatch(match);
}
}
/// <summary>
/// Adds literal value expression ("abc") to the expression tree for the current rule.
/// </summary>
/// <param name="match">Current parse tree node</param>
private void EnterLiteralValue(ITextParseTreeNode match)
{
ruleBodyExpression.AddChild(
new LiteralExpression(match.GetImage()));
}
