private string GenerateAlternativesExpression(Expression expression)
{
AlternativesExpression alternatives = expression as AlternativesExpression;
return(this.GenerateExpression(alternatives.NonAlternativesExpression) + " | " +
this.GenerateExpression(alternatives.Expression));
}
private static TreeViewItem AsTreeViewItem(AlternativesExpression expression)
{
var result = new TreeViewItem();
result.Header = expression.Description;
foreach (var subtree in expression.Subexpressions.Select(exp => AsTreeViewItem((dynamic)exp)))
{
result.Items.Add(subtree);
}
return(result);
}
private ParseAction ImportAlternativesExpression(Expression exp,
Entity entity,
ParseAction parent = null,
bool optional = false)
{
AlternativesExpression alternative = ((AlternativesExpression)exp);
ConsumeAny consume = new ConsumeAny()
{
Parent = parent
};
// AlternativesExpression is constructed recusively, unroll it...
while (true)
{
// add first part
consume.Actions.Add(this.ImportPropertiesAndParseActions(
alternative.NonAlternativesExpression, entity, consume, optional
));
// add remaining parts
if (alternative.Expression is NonAlternativesExpression)
{
// last part
consume.Actions.Add(this.ImportPropertiesAndParseActions(
alternative.Expression, entity, consume, optional
));
break;
}
else
{
// recurse
alternative =
(AlternativesExpression)alternative.Expression;
}
}
return(consume);
}