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-rw-r--r--filter/config.Y21
1 files changed, 20 insertions, 1 deletions
diff --git a/filter/config.Y b/filter/config.Y
index f8f47862..c7c82068 100644
--- a/filter/config.Y
+++ b/filter/config.Y
@@ -296,7 +296,7 @@ assert_assign(struct f_lval *lval, struct f_inst *expr, const char *start, const
checker = f_new_inst(FI_EQ, expr, getter);
setter->next = checker;
-
+
return assert_done(setter, start, end);
}
@@ -307,6 +307,7 @@ CF_KEYWORDS(FUNCTION, PRINT, PRINTN, UNSET, RETURN,
INT, BOOL, IP, TYPE, PREFIX, RD, PAIR, QUAD, EC, LC,
SET, STRING, BGPMASK, BGPPATH, CLIST, ECLIST, LCLIST,
IF, THEN, ELSE, CASE,
+ FOR, IN, DO,
TRUE, FALSE, RT, RO, UNKNOWN, GENERIC,
FROM, GW, NET, MASK, PROTO, SOURCE, SCOPE, DEST, IFNAME, IFINDEX, WEIGHT, GW_MPLS,
PREFERENCE,
@@ -342,6 +343,7 @@ CF_KEYWORDS(FUNCTION, PRINT, PRINTN, UNSET, RETURN,
%type <v> set_atom switch_atom fipa
%type <px> fprefix
%type <t> get_cf_position
+%type <s> for_var
CF_GRAMMAR
@@ -899,6 +901,11 @@ var:
$$ = f_new_inst(FI_VAR_INIT, $3, sym);
}
+for_var:
+ type symbol { $$ = cf_define_symbol($2, SYM_VARIABLE | $1, offset, f_new_var(sym_->scope)); }
+ | CF_SYM_KNOWN { $$ = $1; cf_assert_symbol($1, SYM_VARIABLE); }
+ ;
+
cmd:
'{' cmds_scoped '}' {
$$ = $2;
@@ -909,6 +916,18 @@ cmd:
| IF term THEN cmd ELSE cmd {
$$ = f_new_inst(FI_CONDITION, $2, $4, $6);
}
+ | FOR {
+ /* Reserve space for walk data on stack */
+ cf_push_scope(NULL);
+ conf_this_scope->slots += 2;
+ } for_var IN
+ /* Parse term in the parent scope */
+ { conf_this_scope->active = 0; } term { conf_this_scope->active = 1; }
+ DO cmd {
+ cf_pop_scope();
+ $$ = f_new_inst(FI_FOR_INIT, $6, $3);
+ $$->next = f_new_inst(FI_FOR_NEXT, $3, $9);
+ }
| CF_SYM_KNOWN '=' term ';' {
switch ($1->class) {
case SYM_VARIABLE_RANGE: