public static ArgumentsExpression Parse(ExpressionWalker ew, ExpressionToken left, ExpressionToken right, bool argsOptional, Type caller = null)
{
var args = new ArgumentsExpression();
ew.IsCurrentOrThrow(left);
ew.NextOrThrow();
var exprs = new List <Expression>();
while (ew.Current.Token != right && ew.HasNext)
{
if (ew.Current.Token == ExpressionToken.Comma)
{
if (ew.HasBack && ew.PeakBack.Token == ExpressionToken.Comma)
{
exprs.Add(NullIdentity.Instance);
}
ew.NextOrThrow();
continue;
}
var expression = ParseExpression(ew, caller);
if (ew.IsCurrent(ExpressionToken.Colon))
{
//handle keyvalue item
exprs.Add(KeyValueExpression.Parse(ew, expression, caller));
}
else
{
exprs.Add(expression);
}
}
if (exprs.Count == 0 && !argsOptional)
{
throw new UnexpectedTokenException($"Was expecting an expression between {left} and {right}");
}
ew.Next();
args.Arguments = exprs.ToArray();
return(args);
}
public static ArgumentsExpression Parse(ExpressionWalker ew, Func <TokenMatch, bool> parseTill, bool argsOptional, Type caller = null)
{
var args = new ArgumentsExpression();
var exprs = new List <Expression>();
while (!parseTill(ew.Current) && ew.HasNext)
{
if (ew.Current.Token == ExpressionToken.Comma)
{
if (ew.HasBack && ew.PeakBack.Token == ExpressionToken.Comma)
{
exprs.Add(NullIdentity.Instance);
}
ew.NextOrThrow();
continue;
}
var expression = ParseExpression(ew, caller);
if (ew.IsCurrent(ExpressionToken.Colon))
{
//handle keyvalue item
exprs.Add(KeyValueExpression.Parse(ew, expression));
}
else
{
exprs.Add(expression);
}
}
if (exprs.Count == 0 && !argsOptional)
{
throw new UnexpectedTokenException($"Was expecting arguments but found none while argsOptional is false");
}
ew.Next();
args.Arguments = exprs.ToArray();
return(args);
}
