private Token NextComment(int offset, bool isRem)
{
int start = Index - offset;
var str = GetStringBuilder();
while (!IsEof())
{
char c = Code.GetChar(Index);
if (CharUtils.IsNewLine(c))
{
break;
}
++Index;
str.Append(c);
}
return(new CommentToken
{
Comment = str.ToString(),
IsRem = isRem,
Start = start,
LineNumber = CurrentLine,
LineStart = CurrentLineStart,
End = Index,
});
}
private Token NextDateLiteral()
{
int start = Index++;
var str = GetStringBuilder();
while (!IsEof())
{
char c = Code.GetChar(Index);
if (c == '#' || CharUtils.IsNewLine(c))
{
break;
}
else
{
str.Append(c);
++Index;
}
}
if (Code.GetChar(Index) != '#' || str.Length == 0)
{
throw VBSyntaxError(VBSyntaxErrorCode.SyntaxError);
}
var date = LexerUtils.GetDate(str.ToString());
return(new DateLiteralToken
{
Start = start,
End = ++Index,
LineNumber = CurrentLine,
LineStart = CurrentLineStart,
Value = date,
});
}
private void SkipNewline()
{
char c = Code.GetChar(Index++);
if (CharUtils.IsNewLine(c))
{
if (c == '\r' && Code.GetChar(Index) == '\n')
{
++Index;
}
++CurrentLine;
CurrentLineStart = Index;
}
}
private Token NextStringLiteral()
{
bool err = true;
int start = Index++;
var str = GetStringBuilder();
while (!IsEof())
{
char c = Code.GetChar(Index);
if (c == '"')
{
c = Code.GetChar(++Index);
if (c == '"')
{
++Index;
str.Append(c);
}
else
{
err = false;
break;
}
}
else if (CharUtils.IsNewLine(c))
{
break;
}
else
{
++Index;
str.Append(c);
}
}
if (err)
{
throw VBSyntaxError(VBSyntaxErrorCode.UnterminatedStringConstant);
}
return(new StringLiteralToken
{
Start = start,
End = Index - 1,
LineNumber = CurrentLine,
LineStart = CurrentLineStart,
Value = str.ToString(),
});
}
public void SkipWhitespaces()
{
void SkipWSOnly()
{
char c = Code.GetChar(Index);
while (CharUtils.IsWhiteSpace(c))
{
c = Code.GetChar(++Index);
}
}
while (!IsEof())
{
SkipWSOnly();
char c = Code.GetChar(Index);
if (c == '_')
{
++Index;
SkipWSOnly();
c = Code.GetChar(Index);
if (CharUtils.IsNewLine(c))
{
SkipNewline();
}
else
{
throw VBSyntaxError(VBSyntaxErrorCode.InvalidCharacter);
}
}
else
{
break;
}
}
}