void ParseNumberValue()
{
int start = _startPosition;
if (_numberBase != 10)
{
start += 2;
}
int stop = InputPosition;
if (_typeSuffix != null)
{
stop -= _typeSuffix.Name.Length;
}
UString digits = CharSource.Slice(start, stop - start);
string error;
if ((_value = LesLexer.ParseNumberCore(digits, false, _numberBase, _isFloat, _typeSuffix, out error)) == null)
{
_value = 0;
}
else if (_value == CodeSymbols.Sub)
{
InputPosition = _startPosition + 1;
_type = TT.Sub;
}
if (error != null)
{
Error(_startPosition, error);
}
}
static string UnescapeQuotedString(ref UString source, bool isVerbatim, Action <int, string> onError, UString indentation)
{
Debug.Assert(source.Length >= 1);
if (isVerbatim)
{
bool fail;
char stringType = (char)source.PopFront(out fail);
StringBuilder sb = new StringBuilder();
int c;
for (;;)
{
c = source.PopFront(out fail);
if (fail)
{
break;
}
if (c == stringType)
{
if ((c = source.PopFront(out fail)) != stringType)
{
break;
}
}
sb.Append((char)c);
}
return(sb.ToString());
}
else
{
// triple-quoted or normal string: let LES lexer handle it
return(LesLexer.UnescapeQuotedString(ref source, onError, indentation));
}
}
private void TestLes(string input, string expectOutput, int expectMessages = 0, Severity expectSev = 0)
{
using (G.PushTLV(Token.ToStringStrategyTLV, TokenExt.ToString))
{
MessageHolder errorList;
var input2 = StripInitialNewline(input);
var lexer = new LesLexer(input2, errorList = new MessageHolder());
var wrapr = new LesIndentTokenGenerator(lexer);
var output = new DList <Token>();
for (var t = wrapr.NextToken(); t.HasValue; t = wrapr.NextToken())
{
output.Add(t.Value);
}
var expectTokens = new LesLexer(expectOutput, MessageSink.Console).Buffered().Select(t =>
t.Type() == TokenType.LBrack ? t.WithType((int)TokenType.Indent) :
t.Type() == TokenType.RBrack ? t.WithType((int)TokenType.Dedent) : t).ToList();
AreEqual(expectMessages, errorList.List.Count);
if (expectMessages > 0)
{
AreEqual(expectSev, errorList.List.Max(m => m.Severity));
}
ExpectList(output, expectTokens, false);
}
}
List <Token> Lex(string input, bool skipWS = true)
{
var lexer = new LesLexer(input, MessageSink.Trace);
var lexer2 = new TokensToTree(lexer, skipWS);
var list = new List <Token>();
Token?token;
while ((token = lexer2.NextToken()) != null)
{
list.Add(token.Value);
}
return(list);
}
int MeasureIndent(UString indent)
{
return(LesLexer.MeasureIndent(indent, SpacesPerTab));
}
