diff options
Diffstat (limited to 'src/parser_bison.y')
| -rw-r--r-- | src/parser_bison.y | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/src/parser_bison.y b/src/parser_bison.y index dff8a5ab..f2ae82f4 100644 --- a/src/parser_bison.y +++ b/src/parser_bison.y @@ -448,6 +448,9 @@ static void location_update(struct location *loc, struct location *rhs, int n) %token NOTRACK "notrack" +%token EXISTS "exists" +%token MISSING "missing" + %type <string> identifier type_identifier string comment_spec %destructor { xfree($$); } identifier type_identifier string comment_spec @@ -651,6 +654,10 @@ static void location_update(struct location *loc, struct location *rhs, int n) %type <val> tcp_hdr_field %type <val> tcp_hdr_option_type tcp_hdr_option_field +%type <expr> boolean_expr +%destructor { expr_free($$); } boolean_expr +%type <val> boolean_keys + %% input : /* empty */ @@ -2655,8 +2662,21 @@ concat_rhs_expr : basic_rhs_expr } ; +boolean_keys : EXISTS { $$ = true; } + | MISSING { $$ = false; } + ; + +boolean_expr : boolean_keys + { + $$ = constant_expr_alloc(&@$, &boolean_type, + BYTEORDER_HOST_ENDIAN, + 1, &$1); + } + ; + primary_rhs_expr : symbol_expr { $$ = $1; } | integer_expr { $$ = $1; } + | boolean_expr { $$ = $1; } | ETHER { $$ = symbol_expr_alloc(&@$, SYMBOL_VALUE, |