/**
* # single line
*
* #<optional>#
* block comments
* #<optional>#
*/
public static bool Scan(TextInputRange range)
{
if (range.EndChar != '#')
{
return(false);
}
do
{
range.Extend();
} while (range.IsEndValid && !range.IsEndNewline && !range.IsEndWhitespace && range.EndChar != '#');
// single line comment
if (range.IsEndNewline)
{
return(true);
}
// is block comment
if (range.EndChar == '#')
{
range.Extend();
var commentMarker = range.Text;
while (range.IsEndValid && range.EndString(commentMarker.Length) != commentMarker)
{
if (range.IsEndNewline)
{
range.NewLine();
}
else
{
range.Extend();
}
}
if (range.EndString(commentMarker.Length) != commentMarker)
{
throw new Exception(message: "Line Comment not Escaped.");
}
range.Extend(commentMarker.Length);
}
else
{
do
{
range.Extend();
} while (range.IsEndValid && !range.IsEndNewline);
}
return(true);
}
public void EndStringTest()
{
var input = new TextInputRange {
File = new TextFile {
Content = "ABC",
Filename = ""
}
};
var s = input.EndString(nChars: 4);
Assert.AreEqual(expected: "ABC", actual: s);
}
