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 /lib/command_parse.y | |
| 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 'lib/command_parse.y')
| -rw-r--r-- | lib/command_parse.y | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/lib/command_parse.y b/lib/command_parse.y index f5e42cc304..3e2cdc79af 100644 --- a/lib/command_parse.y +++ b/lib/command_parse.y @@ -105,6 +105,9 @@ %token <string> MAC %token <string> MAC_PREFIX +/* special syntax, value is irrelevant */ +%token <string> EXCL_BRACKET + /* union types for parsed rules */ %type <node> start %type <node> literal_token @@ -372,6 +375,19 @@ selector: '[' selector_seq_seq ']' varname_token } ; +/* ![option] productions */ +selector: EXCL_BRACKET selector_seq_seq ']' varname_token +{ + struct graph_node *neg_only = new_token_node (ctx, NEG_ONLY_TKN, NULL, NULL); + + $$ = $2; + graph_add_edge ($$.start, neg_only); + graph_add_edge (neg_only, $$.end); + cmd_token_varname_set ($2.end->data, $4); + XFREE (MTYPE_LEX, $4); +} +; + %% #undef scanner |