[antlr-interest] "dynamic" whitespace?

[Peter Boughton]

Well it doesn't necessarily have to be a traditional/printed character
- maybe stuff in low ASCII or high Unicode ranges could be guaranteed
not to appear?

Alternatively, as Nick suggests, some form of escaping - e.g. prefix
all non-delimiting delimiter characters with an escape character, for
example backslash, and that way, you could safely escape everything
(with original backslashes would be doubled up).