public static StringBuilder ExtractComment(this StringBuilder @this, int startIndex, out int endIndex)
{
if (@this.Length > startIndex + 1)
{
var ch1 = @this[startIndex];
var ch2 = @this[startIndex + 1];
if (ch1 == '/' && ch2 == '/')
{
// Single line comment
return(@this.ExtractCommentSingleLine(startIndex, out endIndex));
}
if (ch1 == '/' && ch2 == '*')
{
/*
* Multi-line comment
*/
return(@this.ExtractCommentMultiLine(startIndex, out endIndex));
}
}
endIndex = -1;
return(null);
}
public static StringBuilder ExtractTriviaToken(this StringBuilder @this, int startIndex, out int endIndex)
{
var sb = new StringBuilder();
var pos = startIndex;
var isSpace = false;
while (pos < @this.Length)
{
var ch = @this[pos];
pos++;
if (ch == ' ' || ch == '\r' || ch == '\n' || ch == '\t')
{
isSpace = true;
sb.Append(ch);
}
else if (ch == '/' && !isSpace)
{
if (pos < @this.Length)
{
ch = @this[pos];
if (ch == '/')
{
return(@this.ExtractCommentSingleLine(startIndex, out endIndex));
}
if (ch == '*')
{
return(@this.ExtractCommentMultiLine(startIndex, out endIndex));
}
// otherwise is probably the divide operator
pos--;
break;
}
}
else
{
pos -= 2;
break;
}
}
if (isSpace)
{
endIndex = pos;
return(sb);
}
endIndex = -1;
return(null);
}
public static StringBuilder ExtractCommentSingleLine(this StringBuilder @this)
{
return(@this.ExtractCommentSingleLine(0));
}
public static StringBuilder ExtractCommentSingleLine(this StringBuilder @this, int startIndex)
{
int endIndex;
return(@this.ExtractCommentSingleLine(startIndex, out endIndex));
}
public static StringBuilder ExtractCommentSingleLine(this StringBuilder @this, out int endIndex)
{
return(@this.ExtractCommentSingleLine(0, out endIndex));
}
