private static bool TryGetCodePoint(Scanner scanner, out int codePoint)
{
codePoint = 0;
var validCodePoint = false;
var highSurrogate = scanner.ReadChar();
if (highSurrogate > 0 && char.IsHighSurrogate((char) highSurrogate))
{
var lowSurrogate = scanner.ReadChar();
if (lowSurrogate > 0 && char.IsLowSurrogate((char) lowSurrogate))
{
codePoint = char.ConvertToUtf32((char) highSurrogate, (char) lowSurrogate);
validCodePoint = true;
}
else
{
scanner.Position -= 2;
}
}
else
{
scanner.Position--;
}
return validCodePoint;
}
public GrammarMatch(Grammar grammar, Scanner scanner, int index, int length, MatchCollection matches, int errorIndex, int childErrorIndex, IEnumerable<Parser> errors)
: base(grammar.Name, grammar, scanner, index, length, matches)
{
this.errors = errors;
this.ErrorIndex = errorIndex;
this.ChildErrorIndex = childErrorIndex;
}
internal ParseArgs(Grammar grammar, Scanner scanner)
{
Grammar = grammar;
Scanner = scanner;
}
public MatchCollection Matches(Scanner scanner)
{
scanner.ThrowIfNull("scanner");
var matches = new MatchCollection();
var eof = scanner.IsEof;
while (!eof)
{
var match = Match(scanner);
if (match.Success)
{
matches.AddRange(match.Matches);
eof = scanner.IsEof;
}
else
eof = scanner.Advance(1) < 0;
}
return matches;
}
public GrammarMatch Match(Scanner scanner)
{
//scanner.ThrowIfNull("scanner");
var args = new ParseArgs(this, scanner);
if (!initialized)
Initialize();
Parse(args);
var root = args.Root;
if (root.Success && EnableMatchEvents)
{
root.TriggerPreMatch();
root.TriggerMatch();
}
return root;
}
