public void VisitExecute(AExpression expression)
{
// Use reflection to find and invoke the correct Visit method
var types = new[] {expression.GetType()};
MethodInfo methodInfo = GetType().GetMethod("VisitExecute", types);
if (methodInfo != null)
{
methodInfo.Invoke(this, new object[] {expression});
}
else
{
throw new Exception("Visitor does not implement the Visit method for the type: " + expression.GetType());
}
}
public void VisitEnter(AExpression expression)
{
// Use reflection to find and invoke the correct Visit method
var types = new[] { expression.GetType() };
MethodInfo methodInfo = GetType().GetMethod("VisitEnter", types);
if (methodInfo != null)
{
methodInfo.Invoke(this, new object[] { expression });
}
else
{
throw new Exception("Visitor does not implement the Visit method for the type: " + expression.GetType());
}
}
public AstNode Parse(IInputIterator inputIterator)
{
string grammar = @"
NewLine: [\r][\n] / [\n][\r] / [\n] / [\r];
Space: ' ';
Tab: [\t];
(?<EndOfLineComment>): (('#' / '//') (?<msg>(!NewLine .)*) NewLine) ;
(?<MultilineComment>): ('/*' (?<msg>(!'*/' .)*) '*/');
s: ( Space / Tab / MultilineComment )+;
S: ( NewLine / EndOfLineComment )+;
S1: ( NewLine / EndOfLineComment );
W: (s / S);
(?<Table>):(?<Row>
s* ('|' (?<DataColumn> (! ('|' / S) .)+ ))+ '|' S1
)+;
(?<Gherkin>): (((?<Line> s* (?<Key> 'Given'\i / 'When'\i / 'Then'\i / 'And'\i / 'But'\i ) (?<Statement> (!S .)+ ) ) W*) / Table)+;
(?<TagLine>): (?<Tag>'@' ((?<Name> (!(s* '@' / s* S) .)+ )) s*)+ W;
(?<FeatureLine>): 'Feature'\i s* ':' s* (?<Title> (!S .)+ ) W+
(?<InOrder> s* &'In order to'\i (?<Text> (!S .)+ ) S1)?
(?<AsAn> s* &'As an'\i (?<Text> (!S .)+ ) S1)?
(?<IWantTo> s* &'I want to'\i (?<Text> (!S .)+ ) S1)?;
(?<Background>): 'Background'\i s* ':' W* Gherkin ;
(?<Scenario>): TagLine* 'Scenario'\i s* ':' (?<Title> (!S .)+ ) W* Gherkin?;
(?<ScenarioOutline>): TagLine* 'Scenario'\i s 'Outline'\i s* ':' (?<Title> (!S .)+ ) W* Gherkin? (?<Example> s* 'Examples:'\i S1 Table);
(?<Document>): W* TagLine* FeatureLine Background? W* ((Scenario/ScenarioOutline) W*)+ ;
".Trim();
lock (RuleInstanceLock)
{
if (RuleInstance == null)
{
RuleInstance = PEGrammar.Load(grammar);
}
}
var visitor = new NpegParserVisitor(inputIterator);
RuleInstance.Accept(visitor);
if (visitor.IsMatch)
{
return visitor.AST;
}
throw new InvalidInputException();
}
public Sequence Sequence(AExpression other)
{
return(new Sequence(this, other));
}
public PrioritizedChoice Or(AExpression other)
{
return(new PrioritizedChoice(this, other));
}
public Sequence Sequence(AExpression other)
{
return new Sequence(this, other);
}
public PrioritizedChoice Or(AExpression other)
{
return new PrioritizedChoice(this, other);
}
