ref: c2a04cf2cb447ffb3c24d91e7978ef170460bf46
dir: /parse/gram.y/
%{
#define YYERROR_VERBOSE
#define YYDEBUG 1
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <inttypes.h>
#include <ctype.h>
#include <string.h>
#include <assert.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include "parse.h"
Stab *curscope;
void yyerror(const char *s);
int yylex(void);
static Op binop(int toktype);
static Node *mkpseudodecl(Type *t);
static void installucons(Stab *st, Type *t);
static void addtrait(Type *t, char *str);
static void setattrs(Node *dcl, char **attrs, size_t nattrs);
%}
%token<tok> Terror
%token<tok> Tplus /* + */
%token<tok> Tminus /* - */
%token<tok> Tmul /* * */
%token<tok> Tdiv /* / */
%token<tok> Tinc /* ++ */
%token<tok> Tdec /* -- */
%token<tok> Tmod /* % */
%token<tok> Tasn /* = */
%token<tok> Taddeq /* += */
%token<tok> Tsubeq /* -= */
%token<tok> Tmuleq /* *= */
%token<tok> Tdiveq /* /= */
%token<tok> Tmodeq /* %= */
%token<tok> Tboreq /* |= */
%token<tok> Tbxoreq /* ^= */
%token<tok> Tbandeq /* &= */
%token<tok> Tbsleq /* <<= */
%token<tok> Tbsreq /* >>= */
%token<tok> Tbor /* | */
%token<tok> Tbxor /* ^ */
%token<tok> Tband /* & */
%token<tok> Tbsl /* << */
%token<tok> Tbsr /* >> */
%token<tok> Tbnot /* ~ */
%token<tok> Teq /* == */
%token<tok> Tgt /* > */
%token<tok> Tlt /* < */
%token<tok> Tge /* >= */
%token<tok> Tle /* <= */
%token<tok> Tne /* != */
%token<tok> Tlor /* || */
%token<tok> Tland /* && */
%token<tok> Tlnot /* ! */
%token<tok> Tobrace /* { */
%token<tok> Tcbrace /* } */
%token<tok> Toparen /* ( */
%token<tok> Tcparen /* ) */
%token<tok> Tosqbrac /* [ */
%token<tok> Tcsqbrac /* ] */
%token<tok> Tat /* @ */
%token<tok> Ttick /* ` */
%token<tok> Tderef /* # */
%token<tok> Ttype /* type */
%token<tok> Tfor /* for */
%token<tok> Tin /* in */
%token<tok> Twhile /* while */
%token<tok> Tif /* if */
%token<tok> Telse /* else */
%token<tok> Telif /* else */
%token<tok> Tmatch /* match */
%token<tok> Tgoto /* goto */
%token<tok> Tbreak /* break */
%token<tok> Tcontinue /* continue */
%token<tok> Tintlit
%token<tok> Tstrlit
%token<tok> Tfloatlit
%token<tok> Tchrlit
%token<tok> Tboollit
%token<tok> Ttrait /* trait */
%token<tok> Timpl /* trait */
%token<tok> Tstruct /* struct */
%token<tok> Tunion /* union */
%token<tok> Ttyparam /* @typename */
%token<tok> Tconst /* const */
%token<tok> Tvar /* var */
%token<tok> Tgeneric /* var */
%token<tok> Tcast /* castto */
%token<tok> Texport /* export */
%token<tok> Tprotect /* protect */
%token<tok> Tellipsis/* ... */
%token<tok> Tendln /* ; or \n */
%token<tok> Tendblk /* ;; */
%token<tok> Tcolon /* : */
%token<tok> Twith /* :: */
%token<tok> Tdot /* . */
%token<tok> Tcomma /* , */
%token<tok> Tret /* -> */
%token<tok> Tuse /* use */
%token<tok> Tpkg /* pkg */
%token<tok> Tattr /* $attr */
%token<tok> Tsizeof /* sizeof */
%token<tok> Tident
%token<tok> Teof
%start file
%type <ty> type structdef uniondef tupledef compoundtype functype funcsig
%type <ty> generictype
%type <tylist> typelist typarams
%type <nodelist> typaramlist
%type <tok> asnop cmpop addop mulop shiftop optident
%type <tydef> tydef pkgtydef typeid
%type <trait> traitdef
%type <node> exprln retexpr goto continue break expr atomicexpr
%type <node> littok literal asnexpr lorexpr landexpr borexpr
%type <node> bandexpr cmpexpr unionexpr addexpr mulexpr shiftexpr prefixexpr postfixexpr
%type <node> funclit seqlit tuplit name block stmt label use
%type <node> declbody declcore typedeclcore structent arrayelt structelt tuphead
%type <node> ifstmt forstmt whilestmt matchstmt elifs optexprln optexpr
%type <node> match
%type <node> castexpr
%type <ucon> unionelt
%type <node> blkbody
%type <node> implstmt
%type <nodelist> arglist argdefs params matches
%type <nodelist> structbody structelts arrayelts
%type <nodelist> tupbody tuprest
%type <nodelist> decl decllist
%type <nodelist> traitbody implbody
%type <strlist> attrs
%type <uconlist> unionbody
%union {
struct {
Srcloc loc;
Node **nl;
size_t nn;
} nodelist;
struct {
char **str;
size_t nstr;
} strlist;
struct {
Srcloc loc;
Ucon **ucl;
size_t nucl;
} uconlist;
struct {
Srcloc loc;
Type **types;
size_t ntypes;
} tylist;
struct { /* FIXME: unused */
Srcloc loc;
char *name;
Type *type;
Type **params;
size_t nparams;
} tydef;
Trait *trait;
Node *node;
Tok *tok;
Type *ty;
Ucon *ucon;
}
%%
file : toplev
| file Tendln toplev
;
toplev : package
| use {lappend(&file->file.uses, &file->file.nuses, $1);}
| implstmt {
lappend(&file->file.stmts, &file->file.nstmts, $1);
putimpl(file->file.globls, $1);
}
| traitdef {
size_t i;
puttrait(file->file.globls, $1->name, $1);
for (i = 0; i < $1->nfuncs; i++)
putdcl(file->file.globls, $1->funcs[i]);
}
| tydef {
puttype(file->file.globls, mkname($1.loc, $1.name), $1.type);
installucons(file->file.globls, $1.type);
}
| decl {
size_t i;
Node *n;
for (i = 0; i < $1.nn; i++) {
/* putdcl can merge, so we need to getdcl after */
putdcl(file->file.globls, $1.nl[i]);
n = getdcl(file->file.globls, $1.nl[i]->decl.name);
lappend(&file->file.stmts, &file->file.nstmts, n);
$1.nl[i]->decl.isglobl = 1;
}
}
| /* empty */
;
decl : attrs Tvar decllist {
size_t i;
for (i = 0; i < $3.nn; i++)
setattrs($3.nl[i], $1.str, $1.nstr);
$$ = $3;
}
| attrs Tconst decllist {
size_t i;
for (i = 0; i < $3.nn; i++) {
setattrs($3.nl[i], $1.str, $1.nstr);
$3.nl[i]->decl.isconst = 1;
}
$$ = $3;
}
| attrs Tgeneric decllist {
size_t i;
for (i = 0; i < $3.nn; i++) {
setattrs($3.nl[i], $1.str, $1.nstr);
$3.nl[i]->decl.isconst = 1;
$3.nl[i]->decl.isgeneric = 1;
}
$$ = $3;
}
attrs : /* empty */ {$$.nstr = 0; $$.str = NULL;}
| Tattr attrs {
$$ = $2;
lappend(&$$.str, &$$.nstr, strdup($1->id));
}
;
decllist: declbody {
$$.nl = NULL; $$.nn = 0;
lappend(&$$.nl, &$$.nn, $1);
}
| declbody Tcomma decllist {
linsert(&$3.nl, &$3.nn, 0, $1);
$$=$3;
}
;
use : Tuse Tident {$$ = mkuse($1->loc, $2->id, 0);}
| Tuse Tstrlit {$$ = mkuse($1->loc, $2->strval.buf, 1);}
;
optident: Tident {$$ = $1;}
| /* empty */ {$$ = NULL;}
;
package : Tpkg optident Tasn pkgbody Tendblk {
if (file->file.globls->name)
lfatal($1->loc, "Package already declared\n");
if ($2) {
updatens(file->file.globls, $2->id);
}
}
;
pkgbody : pkgitem
| pkgbody Tendln pkgitem
;
pkgitem : decl {
size_t i;
for (i = 0; i < $1.nn; i++) {
$1.nl[i]->decl.vis = Visexport;
$1.nl[i]->decl.isglobl = 1;
putdcl(file->file.globls, $1.nl[i]);
if ($1.nl[i]->decl.init)
lappend(&file->file.stmts, &file->file.nstmts, $1.nl[i]);
}
}
| pkgtydef {
/* the type may only be null in a package context, so we
can set the type when merging in this case.
FIXME: clean up the fucking special cases. */
if ($1.type)
$1.type->vis = Visexport;
puttype(file->file.globls, mkname($1.loc, $1.name), $1.type);
installucons(file->file.globls, $1.type);
}
| traitdef {
size_t i;
$1->vis = Visexport;
puttrait(file->file.globls, $1->name, $1);
for (i = 0; i < $1->nfuncs; i++)
putdcl(file->file.globls, $1->funcs[i]);
}
| implstmt {
$1->impl.vis = Visexport;
putimpl(file->file.globls, $1);
}
| /* empty */
;
pkgtydef: attrs tydef {
size_t i;
$$ = $2;
for (i = 0; i < $1.nstr; i++) {
if (!strcmp($1.str[i], "pkglocal"))
$$.type->ispkglocal = 1;
else
lfatal($$.loc, "invalid type attribute '%s'", $1.str[i]);
}
}
;
declbody: declcore Tasn expr {$$ = $1; $1->decl.init = $3;}
| declcore
;
declcore: name {$$ = mkdecl($1->loc, $1, mktyvar($1->loc));}
| typedeclcore {$$ = $1;}
;
typedeclcore
: name Tcolon type {$$ = mkdecl($1->loc, $1, $3);}
;
name : Tident {$$ = mkname($1->loc, $1->id);}
| Tident Tdot name {$$ = $3; setns($3, $1->id);}
;
implstmt: Timpl name type {
$$ = mkimplstmt($1->loc, $2, $3, NULL, 0);
$$->impl.isproto = 1;
}
| Timpl name type Tasn Tendln implbody Tendblk {
$$ = mkimplstmt($1->loc, $2, $3, $6.nl, $6.nn);
}
;
implbody
: optendlns {$$.nl = NULL; $$.nn = 0;}
| implbody Tident Tasn exprln optendlns {
Node *d;
$$ = $1;
d = mkdecl($2->loc, mkname($2->loc, $2->id), mktyvar($2->loc));
d->decl.init = $4;
d->decl.isconst = 1;
lappend(&$$.nl, &$$.nn, d);
}
;
traitdef: Ttrait Tident generictype /* trait prototype */ {
$$ = mktrait($1->loc, mkname($2->loc, $2->id), $3, NULL, 0, NULL, 0, 1);
}
| Ttrait Tident generictype Tasn traitbody Tendblk /* trait definition */ {
size_t i;
$$ = mktrait($1->loc, mkname($2->loc, $2->id), $3, NULL, 0, $5.nl, $5.nn, 0);
for (i = 0; i < $5.nn; i++) {
$5.nl[i]->decl.trait = $$;
$5.nl[i]->decl.isgeneric = 1;
}
}
;
traitbody
: optendlns {$$.nl = NULL; $$.nn = 0;}
| traitbody Tident Tcolon type optendlns {
Node *d;
$$ = $1;
d = mkdecl($2->loc, mkname($2->loc, $2->id), $4);
d->decl.isgeneric = 1;
d->decl.isconst = 1;
lappend(&$$.nl, &$$.nn, d);
}
;
tydef : Ttype typeid {$$ = $2;}
| Ttype typeid Tasn type {
$$ = $2;
if ($$.nparams == 0) {
$$.type = mktyname($2.loc, mkname($2.loc, $2.name), $4);
} else {
$$.type = mktygeneric($2.loc, mkname($2.loc, $2.name), $2.params, $2.nparams, $4);
}
}
;
typeid : Tident {
$$.loc = $1->loc;
$$.name = $1->id;
$$.params = NULL;
$$.type = NULL;
}
| Tident Toparen typarams Tcparen {
$$.loc = $1->loc;
$$.name = $1->id;
$$.params = $3.types;
$$.nparams = $3.ntypes;
$$.type = NULL;
}
;
typarams: generictype {
$$.types = NULL; $$.ntypes = 0;
lappend(&$$.types, &$$.ntypes, $1);
}
| typarams Tcomma generictype {lappend(&$$.types, &$$.ntypes, $3);}
;
type : structdef
| tupledef
| uniondef
| compoundtype
| generictype
| Tellipsis {$$ = mktype($1->loc, Tyvalist);}
;
generictype
: Ttyparam {$$ = mktyparam($1->loc, $1->id);}
| Ttyparam Twith name {
$$ = mktyparam($1->loc, $1->id);
addtrait($$, $3->name.name);
}
| Ttyparam Twith Toparen typaramlist Tcparen {
size_t i;
$$ = mktyparam($1->loc, $1->id);
for (i = 0; i < $4.nn; i++)
addtrait($$, $4.nl[i]->name.name);
}
;
typaramlist
: name {
$$.nl = NULL; $$.nn = 0;
lappend(&$$.nl, &$$.nn, $1);
}
| typaramlist Tcomma name {lappend(&$$.nl, &$$.nn, $3);}
;
compoundtype
: functype {$$ = $1;}
| type Tosqbrac Tcolon Tcsqbrac {$$ = mktyslice($2->loc, $1);}
| type Tosqbrac expr Tcsqbrac {$$ = mktyarray($2->loc, $1, $3);}
| type Tosqbrac Tellipsis Tcsqbrac {$$ = mktyarray($2->loc, $1, NULL);}
| type Tderef {$$ = mktyptr($2->loc, $1);}
| Tat Tident {$$ = mktyparam($1->loc, $2->id);}
| name {$$ = mktyunres($1->loc, $1, NULL, 0);}
| name Toparen typelist Tcparen {$$ = mktyunres($1->loc, $1, $3.types, $3.ntypes);}
;
functype: Toparen funcsig Tcparen {$$ = $2;}
;
funcsig : argdefs Tret type
{$$ = mktyfunc($2->loc, $1.nl, $1.nn, $3);}
;
argdefs : typedeclcore {
$$.loc = $1->loc;
$$.nl = NULL;
$$.nn = 0; lappend(&$$.nl, &$$.nn, $1);
}
| argdefs Tcomma declcore {lappend(&$$.nl, &$$.nn, $3);}
| /* empty */ {
$$.loc.line = 0;
$$.loc.file = 0;
$$.nl = NULL;
$$.nn = 0;
}
;
tupledef: Toparen typelist Tcparen
{$$ = mktytuple($1->loc, $2.types, $2.ntypes);}
;
typelist: type {
$$.types = NULL; $$.ntypes = 0;
lappend(&$$.types, &$$.ntypes, $1);
}
| typelist Tcomma type
{lappend(&$$.types, &$$.ntypes, $3);}
;
structdef
: Tstruct structbody Tendblk
{$$ = mktystruct($1->loc, $2.nl, $2.nn);}
;
structbody
: structent {
if ($1) {
$$.nl = NULL;
$$.nn = 0;
lappend(&$$.nl, &$$.nn, $1);
}
}
| structbody structent {
if ($2)
lappend(&$$.nl, &$$.nn, $2);
}
;
structent
: declcore Tendln {$$ = $1;}
| Tendln {$$ = NULL;}
;
uniondef
: Tunion unionbody Tendblk
{$$ = mktyunion($1->loc, $2.ucl, $2.nucl);}
;
unionbody
: unionelt {
$$.ucl = NULL;
$$.nucl = 0;
if ($1)
lappend(&$$.ucl, &$$.nucl, $1);
}
| unionbody unionelt {
if ($2)
lappend(&$$.ucl, &$$.nucl, $2);
}
;
unionelt /* nb: the ucon union type gets filled in when we have context */
: Ttick name type Tendln {$$ = mkucon($2->loc, $2, NULL, $3);}
| Ttick name Tendln {$$ = mkucon($2->loc, $2, NULL, NULL);}
| Tendln {$$ = NULL;}
;
goto : Tgoto Tident {$$ = mkexpr($1->loc, Ojmp, mklbl($2->loc, $2->id), NULL);}
;
retexpr : Tret expr {$$ = mkexpr($1->loc, Oret, $2, NULL);}
| Tret {$$ = mkexpr($1->loc, Oret, NULL);}
| expr
;
optexpr : expr {$$ = $1;}
| /* empty */ {$$ = NULL;}
;
optexprln: exprln {$$ = $1;}
| Tendln {$$ = NULL;}
;
exprln : expr Tendln
;
expr : asnexpr
;
asnexpr : lorexpr asnop asnexpr
{$$ = mkexpr($1->loc, binop($2->type), $1, $3, NULL);}
| lorexpr
;
asnop : Tasn
| Taddeq /* += */
| Tsubeq /* -= */
| Tmuleq /* *= */
| Tdiveq /* /= */
| Tmodeq /* %= */
| Tboreq /* |= */
| Tbxoreq /* ^= */
| Tbandeq /* &= */
| Tbsleq /* <<= */
| Tbsreq /* >>= */
;
lorexpr : lorexpr Tlor landexpr
{$$ = mkexpr($1->loc, binop($2->type), $1, $3, NULL);}
| landexpr
;
landexpr: landexpr Tland cmpexpr
{$$ = mkexpr($1->loc, binop($2->type), $1, $3, NULL);}
| cmpexpr
;
cmpexpr : cmpexpr cmpop castexpr
{$$ = mkexpr($1->loc, binop($2->type), $1, $3, NULL);}
| unionexpr
;
cmpop : Teq | Tgt | Tlt | Tge | Tle | Tne ;
unionexpr
: Ttick name unionexpr {$$ = mkexpr($1->loc, Oucon, $2, $3, NULL);}
| Ttick name {$$ = mkexpr($1->loc, Oucon, $2, NULL);}
| castexpr
;
castexpr: castexpr Tcast Toparen type Tcparen {
$$ = mkexpr($1->loc, Ocast, $1, NULL);
$$->expr.type = $4;
}
| borexpr
;
borexpr : borexpr Tbor bandexpr
{$$ = mkexpr($1->loc, binop($2->type), $1, $3, NULL);}
| borexpr Tbxor bandexpr
{$$ = mkexpr($1->loc, binop($2->type), $1, $3, NULL);}
| bandexpr
;
bandexpr: bandexpr Tband addexpr
{$$ = mkexpr($1->loc, binop($2->type), $1, $3, NULL);}
| addexpr
;
addexpr : addexpr addop mulexpr
{$$ = mkexpr($1->loc, binop($2->type), $1, $3, NULL);}
| mulexpr
;
addop : Tplus | Tminus ;
mulexpr : mulexpr mulop shiftexpr
{$$ = mkexpr($1->loc, binop($2->type), $1, $3, NULL);}
| shiftexpr
;
mulop : Tmul | Tdiv | Tmod
;
shiftexpr
: shiftexpr shiftop prefixexpr
{$$ = mkexpr($1->loc, binop($2->type), $1, $3, NULL);}
| prefixexpr
;
shiftop : Tbsl | Tbsr;
prefixexpr
: Tinc prefixexpr {$$ = mkexpr($1->loc, Opreinc, $2, NULL);}
| Tdec prefixexpr {$$ = mkexpr($1->loc, Opredec, $2, NULL);}
| Tband prefixexpr {$$ = mkexpr($1->loc, Oaddr, $2, NULL);}
| Tlnot prefixexpr {$$ = mkexpr($1->loc, Olnot, $2, NULL);}
| Tbnot prefixexpr {$$ = mkexpr($1->loc, Obnot, $2, NULL);}
| Tminus prefixexpr {$$ = mkexpr($1->loc, Oneg, $2, NULL);}
| Tplus prefixexpr {$$ = $2;} /* positive is a nop */
| postfixexpr
;
postfixexpr
: postfixexpr Tdot Tident
{$$ = mkexpr($1->loc, Omemb, $1, mkname($3->loc, $3->id), NULL);}
| postfixexpr Tinc
{$$ = mkexpr($1->loc, Opostinc, $1, NULL);}
| postfixexpr Tdec
{$$ = mkexpr($1->loc, Opostdec, $1, NULL);}
| postfixexpr Tosqbrac expr Tcsqbrac
{$$ = mkexpr($1->loc, Oidx, $1, $3, NULL);}
| postfixexpr Tosqbrac optexpr Tcolon optexpr Tcsqbrac
{$$ = mksliceexpr($1->loc, $1, $3, $5);}
| postfixexpr Tderef
{$$ = mkexpr($1->loc, Oderef, $1, NULL);}
| postfixexpr Toparen arglist Tcparen
{$$ = mkcall($1->loc, $1, $3.nl, $3.nn);}
| atomicexpr
;
arglist : asnexpr
{$$.nl = NULL; $$.nn = 0; lappend(&$$.nl, &$$.nn, $1);}
| arglist Tcomma asnexpr
{lappend(&$$.nl, &$$.nn, $3);}
| /* empty */
{$$.nl = NULL; $$.nn = 0;}
;
atomicexpr
: Tident
{$$ = mkexpr($1->loc, Ovar, mkname($1->loc, $1->id), NULL);}
| literal
| Toparen expr Tcparen
{$$ = $2;}
| Tsizeof Toparen type Tcparen
{$$ = mkexpr($1->loc, Osize, mkpseudodecl($3), NULL);}
;
tupbody : tuphead tuprest
{$$ = $2;
linsert(&$$.nl, &$$.nn, 0, $1);}
;
tuphead : expr Tcomma {$$ = $1;}
;
tuprest : /*empty */
{$$.nl = NULL; $$.nn = 0;}
| expr {
$$.nl = NULL; $$.nn = 0;
lappend(&$$.nl, &$$.nn, $1);
}
| tuprest Tcomma expr {lappend(&$$.nl, &$$.nn, $3);}
;
literal : funclit {$$ = mkexpr($1->loc, Olit, $1, NULL);}
| littok {$$ = mkexpr($1->loc, Olit, $1, NULL);}
| seqlit {$$ = $1;}
| tuplit {$$ = $1;}
;
tuplit : Toparen tupbody Tcparen
{$$ = mkexprl($1->loc, Otup, $2.nl, $2.nn);}
littok : Tstrlit {$$ = mkstr($1->loc, $1->strval);}
| Tchrlit {$$ = mkchar($1->loc, $1->chrval);}
| Tfloatlit {$$ = mkfloat($1->loc, $1->fltval);}
| Tboollit {$$ = mkbool($1->loc, !strcmp($1->id, "true"));}
| Tintlit {
$$ = mkint($1->loc, $1->intval);
if ($1->inttype)
$$->lit.type = mktype($1->loc, $1->inttype);
}
;
funclit : Tobrace params Tendln blkbody Tcbrace
{$$ = mkfunc($1->loc, $2.nl, $2.nn, mktyvar($3->loc), $4);}
| Tobrace params Tret type Tendln blkbody Tcbrace
{$$ = mkfunc($1->loc, $2.nl, $2.nn, $4, $6);}
;
params : declcore {
$$.nl = NULL;
$$.nn = 0;
lappend(&$$.nl, &$$.nn, $1);
}
| params Tcomma declcore {lappend(&$$.nl, &$$.nn, $3);}
| /* empty */ {$$.nl = NULL; $$.nn = 0;}
;
seqlit : Tosqbrac arrayelts optcomma Tcsqbrac
{$$ = mkexprl($1->loc, Oarr, $2.nl, $2.nn);}
| Tosqbrac structelts optcomma Tcsqbrac
{$$ = mkexprl($1->loc, Ostruct, $2.nl, $2.nn);}
| Tosqbrac optendlns optcomma Tcsqbrac /* [] is the empty array. */
{$$ = mkexprl($1->loc, Oarr, NULL, 0);}
;
optcomma: Tcomma optendlns
| /* empty */
;
arrayelts
: optendlns arrayelt {
$$.nl = NULL;
$$.nn = 0;
lappend(&$$.nl, &$$.nn, mkidxinit($2->loc, mkint($2->loc, 0), $2));
}
| arrayelts Tcomma optendlns arrayelt
{lappend(&$$.nl, &$$.nn, mkidxinit($4->loc, mkint($4->loc, $$.nn), $4));}
;
arrayelt: expr optendlns {$$ = $1;}
;
structelts
: optendlns structelt {
$$.nl = NULL;
$$.nn = 0;
lappend(&$$.nl, &$$.nn, $2);
}
| structelts Tcomma optendlns structelt
{lappend(&$$.nl, &$$.nn, $4);}
;
structelt: Tdot Tident Tasn expr optendlns
{$$ = mkidxinit($2->loc, mkname($2->loc, $2->id), $4);}
;
optendlns : /* none */
| optendlns Tendln
;
stmt : goto
| break
| continue
| retexpr
| label
| ifstmt
| forstmt
| whilestmt
| matchstmt
| /* empty */ {$$ = NULL;}
;
break : Tbreak
{$$ = mkexpr($1->loc, Obreak, NULL);}
;
continue : Tcontinue
{$$ = mkexpr($1->loc, Ocontinue, NULL);}
;
forstmt : Tfor optexprln optexprln optexprln block
{$$ = mkloopstmt($1->loc, $2, $3, $4, $5);}
| Tfor expr Tin exprln block
{$$ = mkiterstmt($1->loc, $2, $4, $5);}
/* FIXME: allow decls in for loops
| Tfor decl Tendln optexprln optexprln block
{$$ = mkloopstmt($1->loc, $2, $4, $5, $6);}
*/
;
whilestmt
: Twhile exprln block
{$$ = mkloopstmt($1->loc, NULL, $2, NULL, $3);}
;
ifstmt : Tif exprln blkbody elifs
{$$ = mkifstmt($1->loc, $2, $3, $4);}
;
elifs : Telif exprln blkbody elifs
{$$ = mkifstmt($1->loc, $2, $3, $4);}
| Telse block
{$$ = $2;}
| Tendblk
{$$ = NULL;}
;
matchstmt: Tmatch exprln optendlns Tbor matches Tendblk
{$$ = mkmatchstmt($1->loc, $2, $5.nl, $5.nn);}
;
matches : match {
$$.nl = NULL;
$$.nn = 0;
if ($1)
lappend(&$$.nl, &$$.nn, $1);
}
| matches Tbor match {
if ($2)
lappend(&$$.nl, &$$.nn, $3);
}
;
match : expr Tcolon blkbody Tendln {$$ = mkmatch($1->loc, $1, $3);}
;
block : blkbody Tendblk
;
blkbody : decl {
size_t i;
Node *n, *d, *u;
$$ = mkblock($1.loc, mkstab());
for (i = 0; i < $1.nn; i++) {
d = $1.nl[i];
putdcl($$->block.scope, d);
if (!d->decl.init) {
n = mkexpr(d->loc, Ovar, d->decl.name, NULL);
u = mkexpr(n->loc, Oundef, n, NULL);
n->expr.did = d->decl.did;
lappend(&$$->block.stmts, &$$->block.nstmts, u);
}
lappend(&$$->block.stmts, &$$->block.nstmts, d);
}
}
| stmt {
$$ = mkblock(curloc, mkstab());
if ($1)
lappend(&$$->block.stmts, &$$->block.nstmts, $1);
}
| blkbody Tendln stmt {
if ($3)
lappend(&$1->block.stmts, &$1->block.nstmts, $3);
$$ = $1;
}
| blkbody Tendln decl {
size_t i;
for (i = 0; i < $3.nn; i++){
putdcl($$->block.scope, $3.nl[i]);
lappend(&$1->block.stmts, &$1->block.nstmts, $3.nl[i]);
}
}
;
label : Tcolon Tident
{$$ = mklbl($2->loc, $2->id);}
;
%%
static void addtrait(Type *t, char *str)
{
size_t i;
for (i = 0; i < ntraittab; i++) {
if (!strcmp(namestr(traittab[i]->name), str)) {
settrait(t, traittab[i]);
return;
}
}
lfatal(t->loc, "Constraint %s does not exist", str);
}
static Node *mkpseudodecl(Type *t)
{
static int nextpseudoid;
char buf[128];
Srcloc l;
l.line = -1;
l.file = 0;
snprintf(buf, 128, ".pdecl%d", nextpseudoid++);
return mkdecl(l, mkname(l, buf), t);
}
static void setattrs(Node *dcl, char **attrs, size_t nattrs)
{
size_t i;
for (i = 0; i < nattrs; i++) {
if (!strcmp(attrs[i], "extern"))
dcl->decl.isextern = 1;
else if (!strcmp(attrs[i], "$noret"))
dcl->decl.isnoret = 1;
else if (!strcmp(attrs[i], "pkglocal"))
dcl->decl.ispkglocal = 1;
}
}
static void installucons(Stab *st, Type *t)
{
Type *b;
size_t i;
if (!t)
return;
b = tybase(t);
switch (b->type) {
case Tystruct:
for (i = 0; i < b->nmemb; i++)
installucons(st, b->sdecls[i]->decl.type);
break;
case Tyunion:
for (i = 0; i < b->nmemb; i++) {
b->udecls[i]->utype = b;
b->udecls[i]->id = i;
putucon(st, b->udecls[i]);
}
break;
default:
break;
}
}
static Op binop(int tt)
{
Op o;
o = Obad;
switch (tt) {
case Tplus: o = Oadd; break;
case Tminus: o = Osub; break;
case Tmul: o = Omul; break;
case Tdiv: o = Odiv; break;
case Tmod: o = Omod; break;
case Tasn: o = Oasn; break;
case Taddeq: o = Oaddeq; break;
case Tsubeq: o = Osubeq; break;
case Tmuleq: o = Omuleq; break;
case Tdiveq: o = Odiveq; break;
case Tmodeq: o = Omodeq; break;
case Tboreq: o = Oboreq; break;
case Tbxoreq: o = Obxoreq; break;
case Tbandeq: o = Obandeq; break;
case Tbsleq: o = Obsleq; break;
case Tbsreq: o = Obsreq; break;
case Tbor: o = Obor; break;
case Tbxor: o = Obxor; break;
case Tband: o = Oband; break;
case Tbsl: o = Obsl; break;
case Tbsr: o = Obsr; break;
case Teq: o = Oeq; break;
case Tgt: o = Ogt; break;
case Tlt: o = Olt; break;
case Tge: o = Oge; break;
case Tle: o = Ole; break;
case Tne: o = One; break;
case Tlor: o = Olor; break;
case Tland: o = Oland; break;
default:
die("Unimplemented binop\n");
break;
}
return o;
}