Expressions and patterns

Very long `String' constants:

May not go through. If you add a "string gap" every few thousand characters, then the strings can be as long as you like. Bear in mind that string gaps and the `-cpp' option don't mix. The C-preprocessor may munch the backslashes.

Very long literal lists:

These may tickle a "yacc stack overflow" error in the parser. (It depends on the Yacc used to build your parser.)

Single quotes in module names:

It might work, but it's just begging for trouble.