gram-sieve.y
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%{
%}
%token SIEVE_ADDRESS SIEVE_ALL SIEVE_ALLOF SIEVE_ANYOF SIEVE_COMPARATOR
%token SIEVE_CONTAINS SIEVE_DISCARD SIEVE_DOMAIN SIEVE_ELSE SIEVE_ELSIF
%token SIEVE_ENVELOPE SIEVE_EXISTS SIEVE_FALSE SIEVE_FILEINTO SIEVE_HEADER
%token SIEVE_IF SIEVE_IS SIEVE_KEEP SIEVE_LOCALPART SIEVE_MATCHES
%token SIEVE_NOT SIEVE_NUMBER SIEVE_OVER SIEVE_STRING
%token SIEVE_REDIRECT SIEVE_REJECT SIEVE_REQUIRE SIEVE_SIZE SIEVE_STOP
%token SIEVE_TEST SIEVE_TRUE SIEVE_UNDER
%%
commands : command | command commands ;
command : action_command | control_command | test_command ;
block : '{' commands '}' | '{' /* Empty block. */ '}' ;
action_command : action ';' ;
action : discard | fileinto | keep | redirect | require | reject | stop ;
control_command : SIEVE_IF test_command block else_part
| SIEVE_IF test_command block
;
else_part : SIEVE_ELSIF test_command block else_part
| SIEVE_ELSE block
test_command : test_address | test_allof | test_anyof | test_envelope
| test_exists | test_false | test_header | test_not
| test_size | test_true ;
fileinto : SIEVE_FILEINTO string_list ;
stop : SIEVE_STOP ;
discard : SIEVE_DISCARD ;
keep : SIEVE_KEEP ;
redirect : SIEVE_REDIRECT string_list ;
reject : SIEVE_REJECT SIEVE_STRING ;
require : SIEVE_REQUIRE string_list ;
test_list : '(' tests ')' ;
tests : test | test ',' tests ;
test : test_address | test_anyof | test_envelope | test_false | test_exists
| test_header | test_not | test_size | test_true ;
test_address : SIEVE_ADDRESS address_part match_type
| SIEVE_ADDRESS address_part string_list ;
test_allof : SIEVE_ALLOF test_list ;
test_anyof : SIEVE_ANYOF test_list ;
test_envelope : SIEVE_ENVELOPE ':' comparator | SIEVE_ENVELOPE ':' match_type ;
test_exists : SIEVE_EXISTS string_list ;
test_false : SIEVE_FALSE ;
test_header : SIEVE_HEADER comparator
| SIEVE_HEADER match_type
| SIEVE_HEADER string_list ;
test_not : SIEVE_NOT test | SIEVE_NOT '(' test ')' ;
test_size : SIEVE_SIZE ':' SIEVE_OVER SIEVE_NUMBER
| SIEVE_SIZE ':' SIEVE_UNDER SIEVE_NUMBER ;
test_true : SIEVE_TRUE ;
comparator : ':' SIEVE_COMPARATOR SIEVE_STRING SIEVE_STRING
match_type : ':' SIEVE_IS string_list string_list
| ':' SIEVE_CONTAINS string_list string_list
| ':' SIEVE_MATCHES string_list string_list ;
address_part : ':' SIEVE_DOMAIN ;
| ':' SIEVE_LOCALPART ;
| ':' SIEVE_ALL ;
strings : SIEVE_STRING | SIEVE_STRING ',' strings
string_list : '[' strings ']' | SIEVE_STRING ;