Jerry/bird
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

Original expr' is back, filter expressions renamed to term'.

Browse source 
In the future, we'll allow any filter term in place of `expr' and we'll
just evaluate it immediately, but not now as we have no evaluation
routines.
This commit is contained in:
Martin Mares 1999-01-15 18:04:28 +00:00
parent 3169cf6991
commit c9b6670608
2 changed files with 17 additions and 17 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

22
conf/confbase.Y
View file

@ -1,7 +1,7 @@
/* /*
* BIRD -- Configuration Parser Top * BIRD -- Configuration Parser Top
* *
* (c) 1998 Martin Mares <mj@ucw.cz> * (c) 1998--1999 Martin Mares <mj@ucw.cz>
* *
* Can be freely distributed and used under the terms of the GNU GPL. * Can be freely distributed and used under the terms of the GNU GPL.
*/ */
@ -34,7 +34,7 @@ CF_DECLS
%token <s> SYM %token <s> SYM
%token <t> TEXT %token <t> TEXT
%type <i> cexpr bool pxlen %type <i> expr bool pxlen
%left '+' '-' %left '+' '-'
%left '*' '/' '%' %left '*' '/' '%'
@ -59,20 +59,20 @@ CF_ADDTO(conf, /* EMPTY */)
/* Constant expressions */ /* Constant expressions */
cexpr: expr:
NUM NUM
| cexpr '+' cexpr { $$ = $1 + $3; } | expr '+' expr { $$ = $1 + $3; }
| cexpr '-' cexpr { $$ = $1 - $3; } | expr '-' expr { $$ = $1 - $3; }
| cexpr '*' cexpr { $$ = $1 * $3; } | expr '*' expr { $$ = $1 * $3; }
| cexpr '/' cexpr { if ($3) $$ = $1 / $3; else cf_error("Division by zero"); } | expr '/' expr { if ($3) $$ = $1 / $3; else cf_error("Division by zero"); }
| cexpr '%' cexpr { if ($3) $$ = $1 % $3; else cf_error("Division by zero"); } | expr '%' expr { if ($3) $$ = $1 % $3; else cf_error("Division by zero"); }
| '(' cexpr ')' { $$ = $2; } | '(' expr ')' { $$ = $2; }
| SYM { if ($1->class != SYM_NUMBER) cf_error("Number expected"); else $$ = $1->aux; } | SYM { if ($1->class != SYM_NUMBER) cf_error("Number expected"); else $$ = $1->aux; }
; ;
CF_ADDTO(conf, definition) CF_ADDTO(conf, definition)
definition: definition:
DEFINE SYM '=' cexpr { DEFINE SYM '=' expr {
if ($2->class != SYM_VOID) cf_error("Symbol already defined"); if ($2->class != SYM_VOID) cf_error("Symbol already defined");
$2->class = SYM_NUMBER; $2->class = SYM_NUMBER;
$2->aux = $4; $2->aux = $4;
@ -82,7 +82,7 @@ definition:
/* Switches */ /* Switches */
bool: bool:
cexpr {$$ = !!$1; } expr {$$ = !!$1; }
| ON { $$ = 1; } | ON { $$ = 1; }
| YES { $$ = 1; } | YES { $$ = 1; }
| OFF { $$ = 0; } | OFF { $$ = 0; }

12
filter/config.Y
View file

@ -21,7 +21,7 @@ CF_DECLS
CF_KEYWORDS(FUNCTION, FILTER, PRINTDEBUG, INT, PRINT) CF_KEYWORDS(FUNCTION, FILTER, PRINTDEBUG, INT, PRINT)
%type <x> expr %type <x> term
CF_GRAMMAR CF_GRAMMAR
@ -38,7 +38,7 @@ program: /* EMPTY */
CF_ADDTO(conf, function) CF_ADDTO(conf, function)
function: function:
FUNCTION SYM '(' ')' '{' expr '}' { FUNCTION SYM '(' ')' '{' term '}' {
extern struct f_instruction *last_func; extern struct f_instruction *last_func;
if ($2->class != SYM_VOID) cf_error("Symbol already defined" ); if ($2->class != SYM_VOID) cf_error("Symbol already defined" );
$2->class = SYM_FUNCTION; $2->class = SYM_FUNCTION;
@ -50,7 +50,7 @@ function:
CF_ADDTO(conf, filter) CF_ADDTO(conf, filter)
filter: filter:
FILTER SYM '{' expr '}' { FILTER SYM '{' term '}' {
if ($2->class != SYM_VOID) cf_error("Symbol already defined" ); if ($2->class != SYM_VOID) cf_error("Symbol already defined" );
$2->class = SYM_FILTER; $2->class = SYM_FILTER;
$2->aux = $4; $2->aux = $4;
@ -60,8 +60,8 @@ filter:
/* Programs */ /* Programs */
expr: /* EMPTY */ { $$ = NULL; } term: /* EMPTY */ { $$ = NULL; }
| expr ';' expr { | term ';' term {
$$ = cfg_alloc(sizeof(struct f_instruction)); $$ = cfg_alloc(sizeof(struct f_instruction));
printf( "We've got statement here\n" ); printf( "We've got statement here\n" );
$$->code = ','; $$->code = ',';
@ -74,7 +74,7 @@ expr: /* EMPTY */ { $$ = NULL; }
printf( "New variable\n" ); printf( "New variable\n" );
$$ = NULL; $$ = NULL;
} }
| SYM '=' cexpr { | SYM '=' expr {
$$ = cfg_alloc(sizeof(struct f_instruction)); $$ = cfg_alloc(sizeof(struct f_instruction));
printf( "Ook, we'll set value\n" ); printf( "Ook, we'll set value\n" );
if ($1->class != SYM_VARIABLE_INT) if ($1->class != SYM_VARIABLE_INT)