An attempt at a BNF for the Gopher
command
This command is emcoded to get rid
of disallowed characters, and then
follows something like (not complete
by a long way ...)
- gbits
- gsep [ search ] gsep gpstring
- gsep
- tab
- gpstring
- $ | ! | $ gattrs | ! gattrs
| + gviewlang
- gattrs
- galphas [ space gattrs ]
- gviewlang
- galpha1s space galpha1s
- galphas
- galpha [ galphas ]
- galpha
- alpaha | digit safe | extra
| esc1 | esc2
- esc1
- % 0 not9
- esc2
- % not0 hex
- not 0
- 9 | others
- not 9
- 0 | others
- others
- 1 | 2 | 3 | 4 | 5 | 6 | 7 |
8 | 9 | a | b | c | d | e | f | A
| B | C | D | E F
-
Tim BL