ref: 2b28c30518e4aeb4bfc5592773662b89c58e8663
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 "util.h"
#include "parse.h"
Stab *curscope;
#define LBLSTKSZ 64
static Node **lbls[LBLSTKSZ];
static size_t nlbls[LBLSTKSZ];
/* the first time we see a label, we increment to 0 */
static int lbldepth = -1;
void yyerror(const char *s);
int yylex(void);
static Op binop(int toktype);
static Node *mkpseudodecl(Srcloc l, Type *t);
static void installucons(Stab *st, Type *t);
static void setattrs(Node *dcl, char **attrs, size_t nattrs);
static void setupinit(Node *n);
%}
%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> 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> Tauto /* auto */
%token<tok> Tintlit
%token<tok> Tstrlit
%token<tok> Tfloatlit
%token<tok> Tchrlit
%token<tok> Tboollit
%token<tok> Tvoidlit
%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 /* generic */
%token<tok> Tgap /* _ */
%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
%start file
%type <ty> type structdef uniondef tupledef compoundtype functype funcsig
%type <ty> generictype
%type <tylist> typelist typarams optauxtypes
%type <nodelist> typaramlist
%type <tok> asnop cmpop addop mulop shiftop optident obrace
%type <tydef> tydef pkgtydef typeid
%type <trait> traitdef
%type<node> exprln retexpr goto continue break expr atomicexpr
%type<node> littok literal lorexpr landexpr borexpr strlit bandexpr
%type<node> cmpexpr addexpr mulexpr shiftexpr prefixexpr
%type<node> postfixexpr funclit seqlit tuplit name block stmt label
%type<node> use fnparam declbody declcore typedeclcore autodecl structent
%type<node> arrayelt structelt tuphead ifstmt forstmt whilestmt
%type<node> matchstmt elifs optexprln loopcond optexpr match
%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
/*
We want to bind more tightly to `Foo unaryexpr
than to binary operators around it. Eg:
`Foo +bar
should be interpreted as
(`Foo (+bar))
and not
(`Foo) + (bar)
The default action of shifting does the right thing,
but warnings suck.
*/
%left Ttick
%left Tplus Tminus Tband
%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);
}
| traitdef {
size_t i;
puttrait(file->file.globls, $1->name, $1);
for (i = 0; i < $1->nproto; i++)
putdcl(file->file.globls, $1->proto[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++) {
if (!strcmp(declname($1.nl[i]), "__init__"))
setupinit($1.nl[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;
if ($1.nl[i]->decl.isinit)
file->file.localinit = $1.nl[i];
}
}
| /* 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 {
$$.loc = $1->loc; $$.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->nproto; i++)
putdcl(file->file.globls, $1->proto[i]);
}
| implstmt {
$1->impl.vis = Visexport;
lappend(&file->file.stmts, &file->file.nstmts, $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($$.loc, "invalid type attribute '%s'", $1.str[i]);
}
}
;
declbody: autodecl Tasn expr {$$ = $1; $1->decl.init = $3;}
| autodecl
;
declcore: name {$$ = mkdecl($1->loc, $1, mktyvar($1->loc));}
| typedeclcore {$$ = $1;}
;
typedeclcore
: name Tcolon type {$$ = mkdecl($1->loc, $1, $3);}
;
autodecl: Tauto declcore {$$ = $2; $$->decl.isauto = 1;}
| declcore
;
name : Tident {$$ = mkname($1->loc, $1->id);}
| Tident Tdot Tident {
$$ = mknsname($3->loc, $1->id, $3->id);
}
;
implstmt: Timpl name type optauxtypes {
$$ = mkimplstmt($1->loc, $2, $3, $4.types, $4.ntypes, NULL, 0);
$$->impl.isproto = 1;
}
| Timpl name type optauxtypes Tasn Tendln implbody Tendblk {
$$ = mkimplstmt($1->loc, $2, $3, $4.types, $4.ntypes, $7.nl, $7.nn);
}
;
implbody
: optendlns {$$.nl = NULL; $$.nn = 0;}
| implbody Tident Tasn exprln optendlns {
Node *d;
$$ = $1;
d = mkdecl($2->loc, mkname($2->loc, $2->id), mktyvar($2->loc));
d->decl.init = $4;
d->decl.isconst = 1;
d->decl.isglobl = 1;
lappend(&$$.nl, &$$.nn, d);
}
;
traitdef: Ttrait Tident generictype optauxtypes { /* trait prototype */
$$ = mktrait($1->loc,
mkname($2->loc, $2->id), $3,
$4.types, $4.ntypes,
NULL, 0,
1);
}
| Ttrait Tident generictype optauxtypes Tasn traitbody Tendblk /* trait definition */ {
size_t i;
$$ = mktrait($1->loc,
mkname($2->loc, $2->id), $3,
$4.types, $4.ntypes,
$6.nl, $6.nn,
0);
for (i = 0; i < $6.nn; i++) {
$6.nl[i]->decl.trait = $$;
$6.nl[i]->decl.impls = mkht(tyhash, tyeq);
$6.nl[i]->decl.isgeneric = 1;
}
}
;
optauxtypes
: Tret typelist {$$ = $2;}
| /* empty */ { $$.types = NULL; $$.ntypes = 0; }
;
traitbody
: optendlns {$$.nl = NULL; $$.nn = 0;}
| traitbody Tident Tcolon type optendlns {
Node *d;
$$ = $1;
d = mkdecl($2->loc, mkname($2->loc, $2->id), $4);
d->decl.isglobl = 1;
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 {
$$ = mktyparam($1->loc, $1->id);
lappend(&$$->traits, &$$->ntraits, $3);
}
| Ttyparam Twith Toparen typaramlist Tcparen {
size_t i;
$$ = mktyparam($1->loc, $1->id);
for (i = 0; i < $4.nn; i++)
lappend(&$$->traits, &$$->ntraits, $4.nl[i]);
}
;
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);}
| name Toparen typelist Tcparen {$$ = mktyunres($1->loc, $1, $3.types, $3.ntypes);}
| type Tderef {$$ = mktyptr($2->loc, $1);}
| Tvoidlit {$$ = mktyunres($1->loc, mkname($1->loc, $1->id), NULL, 0);}
| name {$$ = mktyunres($1->loc, $1, NULL, 0);}
;
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, &$$.nn, $1);
}
| argdefs Tcomma typedeclcore {lappend(&$$.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 {$$ = NULL;}
;
goto : Tgoto Tident {
Node *lbl;
lbl = mklbl($2->loc, "");
lbl->expr.args[0]->lit.lblname = strdup($2->id);
$$ = mkexpr($1->loc, Ojmp, lbl, NULL);
}
;
retexpr : Tret expr {$$ = mkexpr($1->loc, Oret, $2, NULL);}
| expr
;
optexpr : expr {$$ = $1;}
| /* empty */ {$$ = NULL;}
;
loopcond: exprln {$$ = $1;}
| Tendln {$$ = mkboollit($1->loc, 1);}
;
optexprln
: exprln {$$ = $1;}
| Tendln {$$ = NULL;}
;
exprln : expr Tendln
;
expr : lorexpr asnop expr
{$$ = 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 borexpr
{$$ = mkexpr($1->loc, binop($2->type), $1, $3, NULL);}
| borexpr
;
cmpop : Teq | Tgt | Tlt | Tge | Tle | Tne ;
borexpr : borexpr Tbor bandexpr
{$$ = 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 */
| Ttick name prefixexpr {$$ = mkexpr($1->loc, Oucon, $2, $3, NULL);}
| Ttick name {$$ = mkexpr($1->loc, Oucon, $2, NULL);}
| 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
{$$ = mkcall($1->loc, $1, $3.nl, $3.nn);}
| atomicexpr
;
arglist : expr
{$$.nl = NULL; $$.nn = 0; lappend(&$$.nl, &$$.nn, $1);}
| arglist Tcomma expr
{lappend(&$$.nl, &$$.nn, $3);}
| /* empty */
{$$.nl = NULL; $$.nn = 0;}
;
atomicexpr
: Tident
{$$ = mkexpr($1->loc, Ovar, mkname($1->loc, $1->id), NULL);}
| Tgap
{$$ = mkexpr($1->loc, Ogap, NULL);}
| literal
| Toparen expr Tcparen
{$$ = $2;}
| Toparen expr Tcolon type Tcparen {
$$ = mkexpr($1->loc, Ocast, $2, NULL);
$$->expr.type = $4;
}
| Tsizeof Toparen type Tcparen {
$$ = mkexpr($1->loc, Osize, mkpseudodecl($1->loc, $3), NULL);
}
| Timpl Toparen name Tcomma type Tcparen {
$$ = mkexpr($1->loc, Ovar, $3, NULL);
$$->expr.param = $5;
}
;
tupbody : tuphead tuprest
{$$ = $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 : strlit {$$ = $1;}
| Tchrlit {$$ = mkchar($1->loc, $1->chrval);}
| Tfloatlit {$$ = mkfloat($1->loc, $1->fltval);}
| Tboollit {$$ = mkbool($1->loc, !strcmp($1->id, "true"));}
| Tvoidlit {$$ = mkvoid($1->loc);}
| Tintlit {
$$ = mkint($1->loc, $1->intval);
if ($1->inttype)
$$->lit.type = mktype($1->loc, $1->inttype);
}
;
strlit : Tstrlit { $$ = mkstr($1->loc, $1->strval); }
| strlit Tstrlit {
Str merged;
merged.len = $1->lit.strval.len + $2->strval.len;
merged.buf = malloc(merged.len);
memcpy(merged.buf, $1->lit.strval.buf, $1->lit.strval.len);
memcpy(merged.buf + $1->lit.strval.len, $2->strval.buf, $2->strval.len);
$$ = mkstr($1->loc, merged);
}
;
obrace : Tobrace {
assert(lbldepth < LBLSTKSZ);
lbldepth++;
}
;
funclit : obrace params Tendln blkbody Tcbrace {
size_t i;
Node *fn, *lit;
$$ = mkfunc($1->loc, $2.nl, $2.nn, mktyvar($3->loc), $4);
fn = $$->lit.fnval;
for (i = 0; i < nlbls[lbldepth]; i++) {
lit = lbls[lbldepth][i]->expr.args[0];
putlbl(fn->func.scope, lit->lit.lblname, lbls[lbldepth][i]);
}
lfree(&lbls[lbldepth], &nlbls[lbldepth]);
assert(lbldepth >= 0);
lbldepth--;
}
| obrace params Tret type Tendln blkbody Tcbrace {
size_t i;
Node *fn, *lit;
$$ = mkfunc($1->loc, $2.nl, $2.nn, $4, $6);
fn = $$->lit.fnval;
for (i = 0; i < nlbls[lbldepth]; i++) {
lit = lbls[lbldepth][i]->expr.args[0];
putlbl(fn->func.scope, lit->lit.lblname, lbls[lbldepth][i]);
}
lfree(&lbls[lbldepth], &nlbls[lbldepth]);
assert(lbldepth >= 0);
lbldepth--;
}
;
params : fnparam {
$$.nl = NULL;
$$.nn = 0;
lappend(&$$.nl, &$$.nn, $1);
}
| params Tcomma fnparam {lappend(&$$.nl, &$$.nn, $3);}
| /* empty */ {$$.nl = NULL; $$.nn = 0;}
;
fnparam : autodecl {$$ = $1;}
| Tgap { $$ = mkpseudodecl($1->loc, mktyvar($1->loc)); }
| Tgap Tcolon type { $$ = mkpseudodecl($1->loc, $3); }
;
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;
$$.nn = 0;
if ($2->expr.idx)
lappend(&$$.nl, &$$.nn, $2);
else
lappend(&$$.nl, &$$.nn, mkidxinit($2->loc, mkintlit($2->loc, 0), $2));
}
| arrayelts Tcomma optendlns arrayelt {
if ($4->expr.idx)
lappend(&$$.nl, &$$.nn, $4);
else
lappend(&$$.nl, &$$.nn, mkidxinit($4->loc, mkintlit($4->loc, $$.nn), $4));
}
;
arrayelt: expr optendlns {$$ = $1;}
| expr Tcolon expr optendlns {
$$ = mkidxinit($2->loc, $1, $3);
}
;
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 {
$$ = $4;
mkidxinit($2->loc, mkname($2->loc, $2->id), $4);
}
;
optendlns : /* none */
| optendlns Tendln
;
stmt : goto
| break
| continue
| retexpr
| label
| ifstmt
| forstmt
| whilestmt
| matchstmt
| /* empty */ {$$ = NULL;}
;
break : Tbreak
{$$ = mkexpr($1->loc, Obreak, NULL);}
;
continue : Tcontinue
{$$ = mkexpr($1->loc, Ocontinue, NULL);}
;
forstmt : Tfor optexprln loopcond optexprln block
{$$ = mkloopstmt($1->loc, $2, $3, $4, $5);}
| Tfor expr Tin exprln block {
$$ = mkiterstmt($1->loc, $2, $4, $5);
fprintf(stderr, "%s:%d: deprecated for syntax. use ':' to replace 'in'\n", fname($1->loc), lnum($1->loc));
}
| Tfor expr Tcolon exprln block
{$$ = mkiterstmt($1->loc, $2, $4, $5);}
| Tfor decl Tendln loopcond optexprln block {
//Node *init;
if ($2.nn != 1)
lfatal($1->loc, "only one declaration is allowed in for loop");
$$ = mkloopstmt($1->loc, $2.nl[0], $4, $5, $6);
putdcl($$->loopstmt.scope, $2.nl[0]);
}
;
whilestmt
: Twhile exprln block
{$$ = 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;
$$.nn = 0;
lappend(&$$.nl, &$$.nn, $1);
}
| matches Tbor match {
lappend(&$$.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;
$$ = mkblock($1.loc, mkstab(0));
for (i = 0; i < $1.nn; i++) {
d = $1.nl[i];
putdcl($$->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 {
$$ = mkblock(curloc, mkstab(0));
if ($1)
lappend(&$$->block.stmts, &$$->block.nstmts, $1);
}
| tydef {
$$ = mkblock(curloc, mkstab(0));
puttype($$->block.scope, mkname($1.loc, $1.name), $1.type);
installucons($$->block.scope, $1.type);
}
| 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]);
}
}
| blkbody Tendln tydef {
puttype($$->block.scope, mkname($3.loc, $3.name), $3.type);
installucons($$->block.scope, $3.type);
}
;
label : Tcolon Tident {
char buf[512];
genlblstr(buf, sizeof buf, $2->id);
$$ = mklbl($2->loc, buf);
$$->expr.args[0]->lit.lblname = strdup($2->id);
lappend(&lbls[lbldepth], &nlbls[lbldepth], $$);
}
;
%%
static void setupinit(Node *n)
{
char name[1024];
char *p, *s;
bprintf(name, sizeof name, "%s$__init__", file->file.files[0]);
s = strrchr(name, '/');
if (s)
s++;
else
s = name;
p = s;
while (*p) {
if (!isalnum(*p) && *p != '_')
*p = '$';
p++;
}
n->decl.isinit = 1;
n->decl.vis = Vishidden;
n->decl.name->name.name = strdup(s);
}
static Node *mkpseudodecl(Srcloc l, Type *t)
{
static int nextpseudoid;
char buf[128];
bprintf(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;
}