diff options
| author | David Lamparter <equinox@opensourcerouting.org> | 2021-08-26 11:43:08 +0200 |
|---|---|---|
| committer | David Lamparter <equinox@opensourcerouting.org> | 2021-08-26 21:03:44 +0200 |
| commit | 90c8406c209a698ecc28c80ad7ebced13a84e3e8 (patch) | |
| tree | 74bedac5f4d8c3bc5b1bdfb42e6eefaa001d714c /tools/permutations.c | |
| parent | 3e324ff41921c719de3aabc4136546828416532f (diff) | |
lib: add `![...]` syntax for easy "no" forms
This allows defining a CLI command like this:
`[no] some setting ![VALUE]`
with VALUE being optional for the "no" form, but required for the
positive form. It's just a `[...]` where the empty branch can only be
taken for commands starting with `no`.
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
Diffstat (limited to 'tools/permutations.c')
| -rw-r--r-- | tools/permutations.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/tools/permutations.c b/tools/permutations.c index f51d4a4ec9..b280cc15b1 100644 --- a/tools/permutations.c +++ b/tools/permutations.c @@ -61,9 +61,22 @@ void permute(struct graph_node *start) struct cmd_token *stok = start->data; struct graph_node *gnn; struct listnode *ln; + bool is_neg = false; // recursive dfs listnode_add(position, start); + + for (ALL_LIST_ELEMENTS_RO(position, ln, gnn)) { + struct cmd_token *tok = gnn->data; + + if (tok->type == WORD_TKN && !strcmp(tok->text, "no")) { + is_neg = true; + break; + } + if (tok->type < SPECIAL_TKN) + break; + } + for (unsigned int i = 0; i < vector_active(start->to); i++) { struct graph_node *gn = vector_slot(start->to, i); struct cmd_token *tok = gn->data; @@ -82,6 +95,9 @@ void permute(struct graph_node *start) fprintf(stdout, "\n"); } else { bool skip = false; + + if (tok->type == NEG_ONLY_TKN && !is_neg) + continue; if (stok->type == FORK_TKN && tok->type != FORK_TKN) for (ALL_LIST_ELEMENTS_RO(position, ln, gnn)) if (gnn == gn) { |