private bool ReadPunctuation(out PunctuationToken token)
{
token = new PunctuationToken();
int firstChar = this.reader.PeekChar();
if (!this.punctuations.ContainsKey(firstChar))
{
return(false);
}
foreach (var punctuation in this.punctuations[firstChar])
{
using (var transaction = new StreamTransaction(this.reader.BaseStream))
{
if (punctuation.Value.HasCharacters(this.reader.ReadChars(punctuation.Value.Length)))
{
token.Value = punctuation.Value;
token.SubType = punctuation.SubType;
transaction.Commit();
return(true);
}
}
}
return(false);
}
public bool ExpectPunctuationToken(PunctuationSubType subType, out PunctuationToken token)
{
token = null;
Token t;
if (!this.ReadToken(out t))
{
this.ScriptError("couldn't read expected token");
return(false);
}
if (t.Type != TokenType.Punctuation)
{
this.ScriptError("expected a punctuation, found {0}", t.Value);
return(false);
}
token = t as PunctuationToken;
if (subType < 0)
{
this.ScriptError("BUG: wrong punctuation subtype");
return(false);
}
if (token.SubType != subType)
{
// Search the punctuation table for the string representation of the punctuation
var punctuation = this.punctuations.Values.SelectMany(a => a.Where(p => p.SubType == subType)).First();
this.ScriptError("expected {0}, found {1}", punctuation.Value, token.Value);
return(false);
}
return(true);
}