+++ /dev/null
-/***** spin: spin.y *****/
-
-/* Copyright (c) 1989-2003 by Lucent Technologies, Bell Laboratories. */
-/* All Rights Reserved. This software is for educational purposes only. */
-/* No guarantee whatsoever is expressed or implied by the distribution of */
-/* this code. Permission is given to distribute this code provided that */
-/* this introductory message is not removed and no monies are exchanged. */
-/* Software written by Gerard J. Holzmann. For tool documentation see: */
-/* http://spinroot.com/ */
-/* Send all bug-reports and/or questions to: bugs@spinroot.com */
-
-%{
-#include "spin.h"
-#include <stdarg.h>
-
-#define YYDEBUG 0
-#define Stop nn(ZN,'@',ZN,ZN)
-
-extern Symbol *context, *owner;
-extern int u_sync, u_async, dumptab;
-extern short has_sorted, has_random, has_enabled, has_pcvalue, has_np;
-extern short has_code, has_state, has_io;
-extern void count_runs(Lextok *);
-extern void no_internals(Lextok *);
-extern void any_runs(Lextok *);
-extern void validref(Lextok *, Lextok *);
-extern char yytext[];
-
-int Mpars = 0; /* max nr of message parameters */
-int Expand_Ok = 0, realread = 1, IArgs = 0, NamesNotAdded = 0;
-char *claimproc = (char *) 0;
-char *eventmap = (char *) 0;
-
-static int Embedded = 0, inEventMap = 0, has_ini = 0;
-
-%}
-
-%token ASSERT PRINT PRINTM
-%token C_CODE C_DECL C_EXPR C_STATE C_TRACK
-%token RUN LEN ENABLED EVAL PC_VAL
-%token TYPEDEF MTYPE INLINE LABEL OF
-%token GOTO BREAK ELSE SEMI
-%token IF FI DO OD SEP
-%token ATOMIC NON_ATOMIC D_STEP UNLESS
-%token TIMEOUT NONPROGRESS
-%token ACTIVE PROCTYPE D_PROCTYPE
-%token HIDDEN SHOW ISLOCAL
-%token PRIORITY PROVIDED
-%token FULL EMPTY NFULL NEMPTY
-%token CONST TYPE XU /* val */
-%token NAME UNAME PNAME INAME /* sym */
-%token STRING CLAIM TRACE INIT /* sym */
-
-%right ASGN
-%left SND O_SND RCV R_RCV /* SND doubles as boolean negation */
-%left OR
-%left AND
-%left '|'
-%left '^'
-%left '&'
-%left EQ NE
-%left GT LT GE LE
-%left LSHIFT RSHIFT
-%left '+' '-'
-%left '*' '/' '%'
-%left INCR DECR
-%right '~' UMIN NEG
-%left DOT
-%%
-
-/** PROMELA Grammar Rules **/
-
-program : units { yytext[0] = '\0'; }
- ;
-
-units : unit
- | units unit
- ;
-
-unit : proc /* proctype { } */
- | init /* init { } */
- | claim /* never claim */
- | events /* event assertions */
- | one_decl /* variables, chans */
- | utype /* user defined types */
- | c_fcts /* c functions etc. */
- | ns /* named sequence */
- | SEMI /* optional separator */
- | error
- ;
-
-proc : inst /* optional instantiator */
- proctype NAME {
- setptype($3, PROCTYPE, ZN);
- setpname($3);
- context = $3->sym;
- context->ini = $2; /* linenr and file */
- Expand_Ok++; /* expand struct names in decl */
- has_ini = 0;
- }
- '(' decl ')' { Expand_Ok--;
- if (has_ini)
- fatal("initializer in parameter list", (char *) 0);
- }
- Opt_priority
- Opt_enabler
- body { ProcList *rl;
- rl = ready($3->sym, $6, $11->sq, $2->val, $10);
- if ($1 != ZN && $1->val > 0)
- { int j;
- for (j = 0; j < $1->val; j++)
- runnable(rl, $9?$9->val:1, 1);
- announce(":root:");
- if (dumptab) $3->sym->ini = $1;
- }
- if (rl && has_ini == 1) /* global initializations, unsafe */
- { /* printf("proctype %s has initialized data\n",
- $3->sym->name);
- */
- rl->unsafe = 1;
- }
- context = ZS;
- }
- ;
-
-proctype: PROCTYPE { $$ = nn(ZN,CONST,ZN,ZN); $$->val = 0; }
- | D_PROCTYPE { $$ = nn(ZN,CONST,ZN,ZN); $$->val = 1; }
- ;
-
-inst : /* empty */ { $$ = ZN; }
- | ACTIVE { $$ = nn(ZN,CONST,ZN,ZN); $$->val = 1; }
- | ACTIVE '[' CONST ']' {
- $$ = nn(ZN,CONST,ZN,ZN); $$->val = $3->val;
- if ($3->val > 255)
- non_fatal("max nr of processes is 255\n", "");
- }
- | ACTIVE '[' NAME ']' {
- $$ = nn(ZN,CONST,ZN,ZN);
- $$->val = 0;
- if (!$3->sym->type)
- non_fatal("undeclared variable %s",
- $3->sym->name);
- else if ($3->sym->ini->ntyp != CONST)
- non_fatal("need constant initializer for %s\n",
- $3->sym->name);
- else
- $$->val = $3->sym->ini->val;
- }
- ;
-
-init : INIT { context = $1->sym; }
- Opt_priority
- body { ProcList *rl;
- rl = ready(context, ZN, $4->sq, 0, ZN);
- runnable(rl, $3?$3->val:1, 1);
- announce(":root:");
- context = ZS;
- }
- ;
-
-claim : CLAIM { context = $1->sym;
- if (claimproc)
- non_fatal("claim %s redefined", claimproc);
- claimproc = $1->sym->name;
- }
- body { (void) ready($1->sym, ZN, $3->sq, 0, ZN);
- context = ZS;
- }
- ;
-
-events : TRACE { context = $1->sym;
- if (eventmap)
- non_fatal("trace %s redefined", eventmap);
- eventmap = $1->sym->name;
- inEventMap++;
- }
- body { (void) ready($1->sym, ZN, $3->sq, 0, ZN);
- context = ZS;
- inEventMap--;
- }
- ;
-
-utype : TYPEDEF NAME { if (context)
- fatal("typedef %s must be global",
- $2->sym->name);
- owner = $2->sym;
- }
- '{' decl_lst '}' { setuname($5); owner = ZS; }
- ;
-
-nm : NAME { $$ = $1; }
- | INAME { $$ = $1;
- if (IArgs)
- fatal("invalid use of '%s'", $1->sym->name);
- }
- ;
-
-ns : INLINE nm '(' { NamesNotAdded++; }
- args ')' { prep_inline($2->sym, $5);
- NamesNotAdded--;
- }
- ;
-
-c_fcts : ccode { /* leaves pseudo-inlines with sym of
- * type CODE_FRAG or CODE_DECL in global context
- */
- }
- | cstate
- ;
-
-cstate : C_STATE STRING STRING {
- c_state($2->sym, $3->sym, ZS);
- has_code = has_state = 1;
- }
- | C_TRACK STRING STRING {
- c_track($2->sym, $3->sym, ZS);
- has_code = has_state = 1;
- }
- | C_STATE STRING STRING STRING {
- c_state($2->sym, $3->sym, $4->sym);
- has_code = has_state = 1;
- }
- | C_TRACK STRING STRING STRING {
- c_track($2->sym, $3->sym, $4->sym);
- has_code = has_state = 1;
- }
- ;
-
-ccode : C_CODE { Symbol *s;
- NamesNotAdded++;
- s = prep_inline(ZS, ZN);
- NamesNotAdded--;
- $$ = nn(ZN, C_CODE, ZN, ZN);
- $$->sym = s;
- has_code = 1;
- }
- | C_DECL { Symbol *s;
- NamesNotAdded++;
- s = prep_inline(ZS, ZN);
- NamesNotAdded--;
- s->type = CODE_DECL;
- $$ = nn(ZN, C_CODE, ZN, ZN);
- $$->sym = s;
- has_code = 1;
- }
- ;
-cexpr : C_EXPR { Symbol *s;
- NamesNotAdded++;
- s = prep_inline(ZS, ZN);
- NamesNotAdded--;
- $$ = nn(ZN, C_EXPR, ZN, ZN);
- $$->sym = s;
- no_side_effects(s->name);
- has_code = 1;
- }
- ;
-
-body : '{' { open_seq(1); }
- sequence OS { add_seq(Stop); }
- '}' { $$->sq = close_seq(0); }
- ;
-
-sequence: step { if ($1) add_seq($1); }
- | sequence MS step { if ($3) add_seq($3); }
- ;
-
-step : one_decl { $$ = ZN; }
- | XU vref_lst { setxus($2, $1->val); $$ = ZN; }
- | NAME ':' one_decl { fatal("label preceding declaration,", (char *)0); }
- | NAME ':' XU { fatal("label predecing xr/xs claim,", 0); }
- | stmnt { $$ = $1; }
- | stmnt UNLESS stmnt { $$ = do_unless($1, $3); }
- ;
-
-vis : /* empty */ { $$ = ZN; }
- | HIDDEN { $$ = $1; }
- | SHOW { $$ = $1; }
- | ISLOCAL { $$ = $1; }
- ;
-
-asgn: /* empty */
- | ASGN
- ;
-
-one_decl: vis TYPE var_list { setptype($3, $2->val, $1); $$ = $3; }
- | vis UNAME var_list { setutype($3, $2->sym, $1);
- $$ = expand($3, Expand_Ok);
- }
- | vis TYPE asgn '{' nlst '}' {
- if ($2->val != MTYPE)
- fatal("malformed declaration", 0);
- setmtype($5);
- if ($1)
- non_fatal("cannot %s mtype (ignored)",
- $1->sym->name);
- if (context != ZS)
- fatal("mtype declaration must be global", 0);
- }
- ;
-
-decl_lst: one_decl { $$ = nn(ZN, ',', $1, ZN); }
- | one_decl SEMI
- decl_lst { $$ = nn(ZN, ',', $1, $3); }
- ;
-
-decl : /* empty */ { $$ = ZN; }
- | decl_lst { $$ = $1; }
- ;
-
-vref_lst: varref { $$ = nn($1, XU, $1, ZN); }
- | varref ',' vref_lst { $$ = nn($1, XU, $1, $3); }
- ;
-
-var_list: ivar { $$ = nn($1, TYPE, ZN, ZN); }
- | ivar ',' var_list { $$ = nn($1, TYPE, ZN, $3); }
- ;
-
-ivar : vardcl { $$ = $1;
- $1->sym->ini = nn(ZN,CONST,ZN,ZN);
- $1->sym->ini->val = 0;
- }
- | vardcl ASGN expr { $1->sym->ini = $3; $$ = $1;
- trackvar($1,$3);
- if ($3->ntyp == CONST
- || ($3->ntyp == NAME && $3->sym->context))
- { has_ini = 2; /* local init */
- } else
- { has_ini = 1; /* possibly global */
- }
- }
- | vardcl ASGN ch_init { $1->sym->ini = $3;
- $$ = $1; has_ini = 1;
- }
- ;
-
-ch_init : '[' CONST ']' OF
- '{' typ_list '}' { if ($2->val) u_async++;
- else u_sync++;
- { int i = cnt_mpars($6);
- Mpars = max(Mpars, i);
- }
- $$ = nn(ZN, CHAN, ZN, $6);
- $$->val = $2->val;
- }
- ;
-
-vardcl : NAME { $1->sym->nel = 1; $$ = $1; }
- | NAME ':' CONST { $1->sym->nbits = $3->val;
- if ($3->val >= 8*sizeof(long))
- { non_fatal("width-field %s too large",
- $1->sym->name);
- $3->val = 8*sizeof(long)-1;
- }
- $1->sym->nel = 1; $$ = $1;
- }
- | NAME '[' CONST ']' { $1->sym->nel = $3->val; $$ = $1; }
- ;
-
-varref : cmpnd { $$ = mk_explicit($1, Expand_Ok, NAME); }
- ;
-
-pfld : NAME { $$ = nn($1, NAME, ZN, ZN); }
- | NAME { owner = ZS; }
- '[' expr ']' { $$ = nn($1, NAME, $4, ZN); }
- ;
-
-cmpnd : pfld { Embedded++;
- if ($1->sym->type == STRUCT)
- owner = $1->sym->Snm;
- }
- sfld { $$ = $1; $$->rgt = $3;
- if ($3 && $1->sym->type != STRUCT)
- $1->sym->type = STRUCT;
- Embedded--;
- if (!Embedded && !NamesNotAdded
- && !$1->sym->type)
- non_fatal("undeclared variable: %s",
- $1->sym->name);
- if ($3) validref($1, $3->lft);
- owner = ZS;
- }
- ;
-
-sfld : /* empty */ { $$ = ZN; }
- | '.' cmpnd %prec DOT { $$ = nn(ZN, '.', $2, ZN); }
- ;
-
-stmnt : Special { $$ = $1; }
- | Stmnt { $$ = $1;
- if (inEventMap)
- non_fatal("not an event", (char *)0);
- }
- ;
-
-Special : varref RCV { Expand_Ok++; }
- rargs { Expand_Ok--; has_io++;
- $$ = nn($1, 'r', $1, $4);
- trackchanuse($4, ZN, 'R');
- }
- | varref SND { Expand_Ok++; }
- margs { Expand_Ok--; has_io++;
- $$ = nn($1, 's', $1, $4);
- $$->val=0; trackchanuse($4, ZN, 'S');
- any_runs($4);
- }
- | IF options FI { $$ = nn($1, IF, ZN, ZN);
- $$->sl = $2->sl;
- prune_opts($$);
- }
- | DO { pushbreak(); }
- options OD { $$ = nn($1, DO, ZN, ZN);
- $$->sl = $3->sl;
- prune_opts($$);
- }
- | BREAK { $$ = nn(ZN, GOTO, ZN, ZN);
- $$->sym = break_dest();
- }
- | GOTO NAME { $$ = nn($2, GOTO, ZN, ZN);
- if ($2->sym->type != 0
- && $2->sym->type != LABEL) {
- non_fatal("bad label-name %s",
- $2->sym->name);
- }
- $2->sym->type = LABEL;
- }
- | NAME ':' stmnt { $$ = nn($1, ':',$3, ZN);
- if ($1->sym->type != 0
- && $1->sym->type != LABEL) {
- non_fatal("bad label-name %s",
- $1->sym->name);
- }
- $1->sym->type = LABEL;
- }
- ;
-
-Stmnt : varref ASGN expr { $$ = nn($1, ASGN, $1, $3);
- trackvar($1, $3);
- nochan_manip($1, $3, 0);
- no_internals($1);
- }
- | varref INCR { $$ = nn(ZN,CONST, ZN, ZN); $$->val = 1;
- $$ = nn(ZN, '+', $1, $$);
- $$ = nn($1, ASGN, $1, $$);
- trackvar($1, $1);
- no_internals($1);
- if ($1->sym->type == CHAN)
- fatal("arithmetic on chan", (char *)0);
- }
- | varref DECR { $$ = nn(ZN,CONST, ZN, ZN); $$->val = 1;
- $$ = nn(ZN, '-', $1, $$);
- $$ = nn($1, ASGN, $1, $$);
- trackvar($1, $1);
- no_internals($1);
- if ($1->sym->type == CHAN)
- fatal("arithmetic on chan id's", (char *)0);
- }
- | PRINT '(' STRING { realread = 0; }
- prargs ')' { $$ = nn($3, PRINT, $5, ZN); realread = 1; }
- | PRINTM '(' varref ')' { $$ = nn(ZN, PRINTM, $3, ZN); }
- | PRINTM '(' CONST ')' { $$ = nn(ZN, PRINTM, $3, ZN); }
- | ASSERT full_expr { $$ = nn(ZN, ASSERT, $2, ZN); AST_track($2, 0); }
- | ccode { $$ = $1; }
- | varref R_RCV { Expand_Ok++; }
- rargs { Expand_Ok--; has_io++;
- $$ = nn($1, 'r', $1, $4);
- $$->val = has_random = 1;
- trackchanuse($4, ZN, 'R');
- }
- | varref RCV { Expand_Ok++; }
- LT rargs GT { Expand_Ok--; has_io++;
- $$ = nn($1, 'r', $1, $5);
- $$->val = 2; /* fifo poll */
- trackchanuse($5, ZN, 'R');
- }
- | varref R_RCV { Expand_Ok++; }
- LT rargs GT { Expand_Ok--; has_io++; /* rrcv poll */
- $$ = nn($1, 'r', $1, $5);
- $$->val = 3; has_random = 1;
- trackchanuse($5, ZN, 'R');
- }
- | varref O_SND { Expand_Ok++; }
- margs { Expand_Ok--; has_io++;
- $$ = nn($1, 's', $1, $4);
- $$->val = has_sorted = 1;
- trackchanuse($4, ZN, 'S');
- any_runs($4);
- }
- | full_expr { $$ = nn(ZN, 'c', $1, ZN); count_runs($$); }
- | ELSE { $$ = nn(ZN,ELSE,ZN,ZN);
- }
- | ATOMIC '{' { open_seq(0); }
- sequence OS '}' { $$ = nn($1, ATOMIC, ZN, ZN);
- $$->sl = seqlist(close_seq(3), 0);
- make_atomic($$->sl->this, 0);
- }
- | D_STEP '{' { open_seq(0); rem_Seq(); }
- sequence OS '}' { $$ = nn($1, D_STEP, ZN, ZN);
- $$->sl = seqlist(close_seq(4), 0);
- make_atomic($$->sl->this, D_ATOM);
- unrem_Seq();
- }
- | '{' { open_seq(0); }
- sequence OS '}' { $$ = nn(ZN, NON_ATOMIC, ZN, ZN);
- $$->sl = seqlist(close_seq(5), 0);
- }
- | INAME { IArgs++; }
- '(' args ')' { pickup_inline($1->sym, $4); IArgs--; }
- Stmnt { $$ = $7; }
- ;
-
-options : option { $$->sl = seqlist($1->sq, 0); }
- | option options { $$->sl = seqlist($1->sq, $2->sl); }
- ;
-
-option : SEP { open_seq(0); }
- sequence OS { $$ = nn(ZN,0,ZN,ZN);
- $$->sq = close_seq(6); }
- ;
-
-OS : /* empty */
- | SEMI { /* redundant semi at end of sequence */ }
- ;
-
-MS : SEMI { /* at least one semi-colon */ }
- | MS SEMI { /* but more are okay too */ }
- ;
-
-aname : NAME { $$ = $1; }
- | PNAME { $$ = $1; }
- ;
-
-expr : '(' expr ')' { $$ = $2; }
- | expr '+' expr { $$ = nn(ZN, '+', $1, $3); }
- | expr '-' expr { $$ = nn(ZN, '-', $1, $3); }
- | expr '*' expr { $$ = nn(ZN, '*', $1, $3); }
- | expr '/' expr { $$ = nn(ZN, '/', $1, $3); }
- | expr '%' expr { $$ = nn(ZN, '%', $1, $3); }
- | expr '&' expr { $$ = nn(ZN, '&', $1, $3); }
- | expr '^' expr { $$ = nn(ZN, '^', $1, $3); }
- | expr '|' expr { $$ = nn(ZN, '|', $1, $3); }
- | expr GT expr { $$ = nn(ZN, GT, $1, $3); }
- | expr LT expr { $$ = nn(ZN, LT, $1, $3); }
- | expr GE expr { $$ = nn(ZN, GE, $1, $3); }
- | expr LE expr { $$ = nn(ZN, LE, $1, $3); }
- | expr EQ expr { $$ = nn(ZN, EQ, $1, $3); }
- | expr NE expr { $$ = nn(ZN, NE, $1, $3); }
- | expr AND expr { $$ = nn(ZN, AND, $1, $3); }
- | expr OR expr { $$ = nn(ZN, OR, $1, $3); }
- | expr LSHIFT expr { $$ = nn(ZN, LSHIFT,$1, $3); }
- | expr RSHIFT expr { $$ = nn(ZN, RSHIFT,$1, $3); }
- | '~' expr { $$ = nn(ZN, '~', $2, ZN); }
- | '-' expr %prec UMIN { $$ = nn(ZN, UMIN, $2, ZN); }
- | SND expr %prec NEG { $$ = nn(ZN, '!', $2, ZN); }
-
- | '(' expr SEMI expr ':' expr ')' {
- $$ = nn(ZN, OR, $4, $6);
- $$ = nn(ZN, '?', $2, $$);
- }
-
- | RUN aname { Expand_Ok++;
- if (!context)
- fatal("used 'run' outside proctype",
- (char *) 0);
- }
- '(' args ')'
- Opt_priority { Expand_Ok--;
- $$ = nn($2, RUN, $5, ZN);
- $$->val = ($7) ? $7->val : 1;
- trackchanuse($5, $2, 'A'); trackrun($$);
- }
- | LEN '(' varref ')' { $$ = nn($3, LEN, $3, ZN); }
- | ENABLED '(' expr ')' { $$ = nn(ZN, ENABLED, $3, ZN);
- has_enabled++;
- }
- | varref RCV { Expand_Ok++; }
- '[' rargs ']' { Expand_Ok--; has_io++;
- $$ = nn($1, 'R', $1, $5);
- }
- | varref R_RCV { Expand_Ok++; }
- '[' rargs ']' { Expand_Ok--; has_io++;
- $$ = nn($1, 'R', $1, $5);
- $$->val = has_random = 1;
- }
- | varref { $$ = $1; trapwonly($1 /*, "varref" */); }
- | cexpr { $$ = $1; }
- | CONST { $$ = nn(ZN,CONST,ZN,ZN);
- $$->ismtyp = $1->ismtyp;
- $$->val = $1->val;
- }
- | TIMEOUT { $$ = nn(ZN,TIMEOUT, ZN, ZN); }
- | NONPROGRESS { $$ = nn(ZN,NONPROGRESS, ZN, ZN);
- has_np++;
- }
- | PC_VAL '(' expr ')' { $$ = nn(ZN, PC_VAL, $3, ZN);
- has_pcvalue++;
- }
- | PNAME '[' expr ']' '@' NAME
- { $$ = rem_lab($1->sym, $3, $6->sym); }
- | PNAME '[' expr ']' ':' pfld
- { $$ = rem_var($1->sym, $3, $6->sym, $6->lft); }
- | PNAME '@' NAME { $$ = rem_lab($1->sym, ZN, $3->sym); }
- | PNAME ':' pfld { $$ = rem_var($1->sym, ZN, $3->sym, $3->lft); }
- ;
-
-Opt_priority: /* none */ { $$ = ZN; }
- | PRIORITY CONST { $$ = $2; }
- ;
-
-full_expr: expr { $$ = $1; }
- | Expr { $$ = $1; }
- ;
-
-Opt_enabler: /* none */ { $$ = ZN; }
- | PROVIDED '(' full_expr ')' { if (!proper_enabler($3))
- { non_fatal("invalid PROVIDED clause",
- (char *)0);
- $$ = ZN;
- } else
- $$ = $3;
- }
- | PROVIDED error { $$ = ZN;
- non_fatal("usage: provided ( ..expr.. )",
- (char *)0);
- }
- ;
-
- /* an Expr cannot be negated - to protect Probe expressions */
-Expr : Probe { $$ = $1; }
- | '(' Expr ')' { $$ = $2; }
- | Expr AND Expr { $$ = nn(ZN, AND, $1, $3); }
- | Expr AND expr { $$ = nn(ZN, AND, $1, $3); }
- | Expr OR Expr { $$ = nn(ZN, OR, $1, $3); }
- | Expr OR expr { $$ = nn(ZN, OR, $1, $3); }
- | expr AND Expr { $$ = nn(ZN, AND, $1, $3); }
- | expr OR Expr { $$ = nn(ZN, OR, $1, $3); }
- ;
-
-Probe : FULL '(' varref ')' { $$ = nn($3, FULL, $3, ZN); }
- | NFULL '(' varref ')' { $$ = nn($3, NFULL, $3, ZN); }
- | EMPTY '(' varref ')' { $$ = nn($3, EMPTY, $3, ZN); }
- | NEMPTY '(' varref ')' { $$ = nn($3,NEMPTY, $3, ZN); }
- ;
-
-basetype: TYPE { $$->sym = ZS;
- $$->val = $1->val;
- if ($$->val == UNSIGNED)
- fatal("unsigned cannot be used as mesg type", 0);
- }
- | UNAME { $$->sym = $1->sym;
- $$->val = STRUCT;
- }
- | error /* e.g., unsigned ':' const */
- ;
-
-typ_list: basetype { $$ = nn($1, $1->val, ZN, ZN); }
- | basetype ',' typ_list { $$ = nn($1, $1->val, ZN, $3); }
- ;
-
-args : /* empty */ { $$ = ZN; }
- | arg { $$ = $1; }
- ;
-
-prargs : /* empty */ { $$ = ZN; }
- | ',' arg { $$ = $2; }
- ;
-
-margs : arg { $$ = $1; }
- | expr '(' arg ')' { if ($1->ntyp == ',')
- $$ = tail_add($1, $3);
- else
- $$ = nn(ZN, ',', $1, $3);
- }
- ;
-
-arg : expr { if ($1->ntyp == ',')
- $$ = $1;
- else
- $$ = nn(ZN, ',', $1, ZN);
- }
- | expr ',' arg { if ($1->ntyp == ',')
- $$ = tail_add($1, $3);
- else
- $$ = nn(ZN, ',', $1, $3);
- }
- ;
-
-rarg : varref { $$ = $1; trackvar($1, $1);
- trapwonly($1 /*, "rarg" */); }
- | EVAL '(' expr ')' { $$ = nn(ZN,EVAL,$3,ZN);
- trapwonly($1 /*, "eval rarg" */); }
- | CONST { $$ = nn(ZN,CONST,ZN,ZN);
- $$->ismtyp = $1->ismtyp;
- $$->val = $1->val;
- }
- | '-' CONST %prec UMIN { $$ = nn(ZN,CONST,ZN,ZN);
- $$->val = - ($2->val);
- }
- ;
-
-rargs : rarg { if ($1->ntyp == ',')
- $$ = $1;
- else
- $$ = nn(ZN, ',', $1, ZN);
- }
- | rarg ',' rargs { if ($1->ntyp == ',')
- $$ = tail_add($1, $3);
- else
- $$ = nn(ZN, ',', $1, $3);
- }
- | rarg '(' rargs ')' { if ($1->ntyp == ',')
- $$ = tail_add($1, $3);
- else
- $$ = nn(ZN, ',', $1, $3);
- }
- | '(' rargs ')' { $$ = $2; }
- ;
-
-nlst : NAME { $$ = nn($1, NAME, ZN, ZN);
- $$ = nn(ZN, ',', $$, ZN); }
- | nlst NAME { $$ = nn($2, NAME, ZN, ZN);
- $$ = nn(ZN, ',', $$, $1);
- }
- | nlst ',' { $$ = $1; /* commas optional */ }
- ;
-%%
-
-void
-yyerror(char *fmt, ...)
-{
- non_fatal(fmt, (char *) 0);
-}
projects / lttv.git / blobdiff