public virtual string Identifier([NotNull] string name, [CanBeNull] ICollection <string> scope = null)
{
Check.NotEmpty(name, nameof(name));
var builder = new StringBuilder();
var partStart = 0;
for (var i = 0; i < name.Length; i++)
{
if (!SyntaxFacts.IsIdentifierPartCharacter(name[i]))
{
if (partStart != i)
{
builder.Append(name.Substring(partStart, i - partStart));
}
partStart = i + 1;
}
}
if (partStart != name.Length)
{
builder.Append(name.Substring(partStart));
}
if (!SyntaxFacts.IsIdentifierStartCharacter(builder[0]))
{
builder.Insert(0, "_");
}
var identifier = builder.ToString();
if (scope != null)
{
var uniqueIdentifier = identifier;
var qualifier = 0;
while (scope.Contains(uniqueIdentifier))
{
uniqueIdentifier = identifier + qualifier++;
}
scope.Add(uniqueIdentifier);
identifier = uniqueIdentifier;
}
if (SyntaxFacts.GetKeywordKind(identifier) != SyntaxKind.None ||
SyntaxFacts.GetPreprocessorKeywordKind(identifier) != SyntaxKind.None ||
SyntaxFacts.GetContextualKeywordKind(identifier) != SyntaxKind.None)
{
return("@" + identifier);
}
return(identifier);
}
private void ReadIdentifierOrKeyword()
{
var start = _charReader.Position;
// Skip first letter
NextChar();
// The following characters can be letters, digits the underscore and the dollar sign.
while (char.IsLetterOrDigit(_charReader.Current) ||
_charReader.Current == '_' ||
_charReader.Current == '$')
{
NextChar();
}
var end = _charReader.Position;
var span = TextSpan.FromBounds(start, end);
var text = File.Text.GetSubText(span).ToString();
_kind = SyntaxFacts.GetKeywordKind(text);
_contextualKind = (_mode == LexerMode.Directive)
? SyntaxFacts.GetPreprocessorKeywordKind(text)
: SyntaxFacts.GetContextualKeywordKind(text);
switch (_kind)
{
case SyntaxKind.TrueKeyword:
_value = true;
break;
case SyntaxKind.FalseKeyword:
_value = false;
break;
default:
_value = text;
break;
}
}
