/// <summary>
/// Recognizes a map item's initializer.
/// </summary>
/// <returns>A <see cref="MapItemInitializer"/></returns>
protected MapItemInitializer MapItemInitializer()
{
Expression key = Expression();
if (key == null)
{
return(null);
}
Match(TokenID.Arrow);
var value = Required <Expression>(Expression, Resources.ExpressionRequired);
var initializer = new MapItemInitializer(key, value);
initializer.SetLocation(key.Start, value.End);
return(initializer);
}
private void ProcessMapItemInitializer(XmlElement parent, MapItemInitializer initializer)
{
XmlElement tmpElement = document.CreateElement("MapItemInitializer");
parent.AppendChild(tmpElement);
XmlElement previousElement = currentElement;
currentElement = document.CreateElement("Key");
initializer.Key.AcceptCompiler(this);
previousElement.AppendChild(currentElement);
currentElement = document.CreateElement("Value");
initializer.Value.AcceptCompiler(this);
previousElement.AppendChild(currentElement);
currentElement = previousElement;
}
private void DumpMapItemInitializer(MapItemInitializer itemInitializer)
{
itemInitializer.Key.AcceptCompiler(this);
textWriter.Write(" => ");
itemInitializer.Value.AcceptCompiler(this);
}
/// <summary>
/// Recognizes expressions that start with a left brace.
/// </summary>
/// <returns>
/// A <see cref="MapInitializer"/> or a <see cref="SetInitializer"/>
/// </returns>
protected Expression AtomStartingWithLBrace()
{
bool isSet = false;
var mapItems = new MapItemInitializer[0];
var setItems = new Expression[0];
Token first = Match(TokenID.LeftBrace);
Expression e1 = Expression();
if (e1 == null)
{
if (TryMatch(TokenID.Arrow))
{
Consume(1);
}
else
{
isSet = true;
}
}
else
{
if (TryMatch(TokenID.Arrow))
{
Consume(1);
var e2 = Required <Expression>(Expression, Resources.ExpressionRequired);
var tmpList = new List <MapItemInitializer> {
new MapItemInitializer(e1, e2)
};
if (TryMatch(TokenID.Comma))
{
Consume(1);
tmpList.AddRange(List <MapItemInitializer>(MapItemInitializer, false, null));
}
mapItems = tmpList.ToArray();
}
else
{
isSet = true;
var tmpList = new List <Expression> {
e1
};
if (TryMatch(TokenID.Comma))
{
Consume(1);
tmpList.AddRange(List <Expression>(Expression, false, null));
}
setItems = tmpList.ToArray();
}
}
Token last = Match(TokenID.RightBrace);
Expression initializer = isSet
? new SetInitializer(setItems)
: (Expression) new MapInitializer(mapItems);
initializer.SetLocation(first.Start, last.End);
return(initializer);
}
