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// Inferno utils/cc/cc.y
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// http://code.google.com/p/inferno-os/source/browse/utils/cc/cc.y
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// Copyright © 1994-1999 Lucent Technologies Inc. All rights reserved.
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// Portions Copyright © 1995-1997 C H Forsyth (forsyth@terzarima.net)
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// Portions Copyright © 1997-1999 Vita Nuova Limited
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// Portions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com)
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// Portions Copyright © 2004,2006 Bruce Ellis
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// Portions Copyright © 2005-2007 C H Forsyth (forsyth@terzarima.net)
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// Revisions Copyright © 2000-2007 Lucent Technologies Inc. and others
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// Portions Copyright © 2009 The Go Authors. All rights reserved.
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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#include <stdio.h> /* if we don't, bison will, and cc.h re-#defines getc */
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%type <lval> gctname gcname cname gname tname
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%type <lval> gctnlist gcnlist zgnlist
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%type <type> tlist sbody complex
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%type <node> zarglist arglist zcexpr
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%type <node> name block stmnt cexpr expr xuexpr pexpr
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%type <node> zelist elist adecl slist uexpr string lstring
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%type <node> xdecor xdecor2 labels label ulstmnt
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%type <node> adlist edecor tag qual qlist
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%type <node> abdecor abdecor1 abdecor2 abdecor3
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%type <node> zexpr lexpr init ilist forexpr
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%right '=' LPE LME LMLE LDVE LMDE LRSHE LLSHE LANDE LXORE LORE
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%right LMM LPP LMG '.' '[' '('
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%token <sym> LNAME LTYPE
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%token <dval> LFCONST LDCONST
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%token <vval> LCONST LLCONST LUCONST LULCONST LVLCONST LUVLCONST
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%token <sval> LSTRING LLSTRING
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%token LAUTO LBREAK LCASE LCHAR LCONTINUE LDEFAULT LDO
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%token LDOUBLE LELSE LEXTERN LFLOAT LFOR LGOTO
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%token LIF LINT LLONG LREGISTER LRETURN LSHORT LSIZEOF LUSED
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%token LSTATIC LSTRUCT LSWITCH LTYPEDEF LTYPESTR LUNION LUNSIGNED
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%token LWHILE LVOID LENUM LSIGNED LCONSTNT LVOLATILE LSET LSIGNOF
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%token LRESTRICT LINLINE
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* external declarator
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dodecl(xdecl, lastclass, lasttype, Z);
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dodecl(xdecl, lastclass, lasttype, $2);
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if(lastdcl == T || lastdcl->etype != TFUNC) {
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diag($2, "not a function");
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lastdcl = types[TFUNC];
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$6 = new(OLIST, n, $6);
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if(!debug['a'] && !debug['Z'])
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dodecl(xdecl, lastclass, lasttype, $1);
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$1 = dodecl(xdecl, lastclass, lasttype, $1);
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doinit($1->sym, $1->type, 0L, $4);
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$$ = new(OIND, $3, Z);
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$$->garb = simpleg($2);
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| xdecor2 '(' zarglist ')'
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$$ = new(OFUNC, $1, $3);
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| xdecor2 '[' zexpr ']'
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$$ = new(OARRAY, $1, $3);
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* automatic declarator
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$$ = dodecl(adecl, lastclass, lasttype, Z);
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dodecl(adecl, lastclass, lasttype, $1);
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$1 = dodecl(adecl, lastclass, lasttype, $1);
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w = $1->sym->type->width;
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$$ = doinit($1->sym, $1->type, 0L, $4);
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$$ = contig($1->sym, $$, w);
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$$ = new(OLIST, $1, $3);
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* parameter declarator
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| pdecl ctlist pdlist ';'
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dodecl(pdecl, lastclass, lasttype, $1);
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* structure element declarator
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zedlist: /* extension */
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edecl(CXXX, lasttype, S);
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dodecl(edecl, CXXX, lasttype, $1);
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$$ = new(OBIT, $1, $3);
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$$ = new(OBIT, Z, $2);
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* abstract declarator
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$$ = new(OIND, (Z), Z);
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$$->garb = simpleg($2);
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| '*' zgnlist abdecor1
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$$ = new(OIND, $3, Z);
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$$->garb = simpleg($2);
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| abdecor2 '(' zarglist ')'
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$$ = new(OFUNC, $1, $3);
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| abdecor2 '[' zexpr ']'
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$$ = new(OARRAY, $1, $3);
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$$ = new(OFUNC, (Z), Z);
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$$ = new(OARRAY, (Z), $2);
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$$ = new(OINIT, invert($2), Z);
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$$ = new(OARRAY, $2, Z);
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$$ = new(OELEM, Z, Z);
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$$ = new(OLIST, $1, $2);
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$$ = new(OLIST, $1, $2);
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$$ = new(OLIST, $1, $2);
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$$ = new(OPROTO, $2, Z);
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$$ = new(OPROTO, $2, Z);
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$$ = new(ODOTDOT, Z, Z);
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| arglist ',' arglist
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$$ = new(OLIST, $1, $3);
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// $$ = new(OLIST, $2, $$);
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$$ = new(OLIST, Z, Z);
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$$ = new(OLIST, $1, $2);
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$$ = new(OLIST, $1, $2);
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$$ = new(OLIST, $1, $2);
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$$ = new(OCASE, $2, Z);
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$$ = new(OCASE, Z, Z);
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$$ = new(OLABEL, dcllabel($1, 1), Z);
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$$ = new(OLIST, $1, $2);
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$$ = new(OLIST, $$, $2);
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| LIF '(' cexpr ')' stmnt
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$$ = new(OIF, $3, new(OLIST, $5, Z));
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warn($3, "empty if body");
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| LIF '(' cexpr ')' stmnt LELSE stmnt
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$$ = new(OIF, $3, new(OLIST, $5, $7));
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warn($3, "empty if body");
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warn($3, "empty else body");
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| { markdcl(); } LFOR '(' forexpr ';' zcexpr ';' zcexpr ')' stmnt
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$4 = new(OLIST, $$, $4);
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$$ = new(OFOR, new(OLIST, $6, new(OLIST, $4, $8)), $10);
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| LWHILE '(' cexpr ')' stmnt
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$$ = new(OWHILE, $3, $5);
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| LDO stmnt LWHILE '(' cexpr ')' ';'
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$$ = new(ODWHILE, $5, $2);
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$$ = new(ORETURN, $2, Z);
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$$->type = thisfn->link;
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| LSWITCH '(' cexpr ')' stmnt
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$$ = new(OCONST, Z, Z);
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$$->type = types[TINT];
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$3 = new(OSUB, $$, $3);
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$$ = new(OCONST, Z, Z);
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$$->type = types[TINT];
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$3 = new(OSUB, $$, $3);
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$$ = new(OSWITCH, $3, $5);
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$$ = new(OBREAK, Z, Z);
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$$ = new(OCONTINUE, Z, Z);
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$$ = new(OGOTO, dcllabel($2, 0), Z);
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| LUSED '(' zelist ')' ';'
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$$ = new(OUSED, $3, Z);
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| LSET '(' zelist ')' ';'
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$$ = new(OSET, $3, Z);
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$$ = new(OCAST, $1, Z);
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$$->type = types[TLONG];
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$$ = new(OCOMMA, $1, $3);
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$$ = new(OMUL, $1, $3);
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$$ = new(ODIV, $1, $3);
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$$ = new(OMOD, $1, $3);
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$$ = new(OADD, $1, $3);
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$$ = new(OSUB, $1, $3);
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$$ = new(OASHR, $1, $3);
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$$ = new(OASHL, $1, $3);
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$$ = new(OLT, $1, $3);
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$$ = new(OGT, $1, $3);
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$$ = new(OLE, $1, $3);
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$$ = new(OGE, $1, $3);
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$$ = new(OEQ, $1, $3);
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$$ = new(ONE, $1, $3);
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$$ = new(OAND, $1, $3);
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$$ = new(OXOR, $1, $3);
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$$ = new(OOR, $1, $3);
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$$ = new(OANDAND, $1, $3);
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$$ = new(OOROR, $1, $3);
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| expr '?' cexpr ':' expr
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$$ = new(OCOND, $1, new(OLIST, $3, $5));
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$$ = new(OAS, $1, $3);
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$$ = new(OASADD, $1, $3);
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$$ = new(OASSUB, $1, $3);
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$$ = new(OASMUL, $1, $3);
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$$ = new(OASDIV, $1, $3);
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$$ = new(OASMOD, $1, $3);
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$$ = new(OASASHL, $1, $3);
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$$ = new(OASASHR, $1, $3);
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$$ = new(OASAND, $1, $3);
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$$ = new(OASXOR, $1, $3);
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$$ = new(OASOR, $1, $3);
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| '(' tlist abdecor ')' xuexpr
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$$ = new(OCAST, $5, Z);
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dodecl(NODECL, CXXX, $2, $3);
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| '(' tlist abdecor ')' '{' ilist '}' /* extension */
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$$ = new(OSTRUCT, $6, Z);
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dodecl(NODECL, CXXX, $2, $3);
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$$ = new(OIND, $2, Z);
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$$ = new(OADDR, $2, Z);
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$$ = new(OPOS, $2, Z);
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$$ = new(ONEG, $2, Z);
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$$ = new(ONOT, $2, Z);
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$$ = new(OCOM, $2, Z);
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$$ = new(OPREINC, $2, Z);
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$$ = new(OPREDEC, $2, Z);
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$$ = new(OSIZE, $2, Z);
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$$ = new(OSIGN, $2, Z);
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| LSIZEOF '(' tlist abdecor ')'
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$$ = new(OSIZE, Z, Z);
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dodecl(NODECL, CXXX, $3, $4);
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| LSIGNOF '(' tlist abdecor ')'
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$$ = new(OSIGN, Z, Z);
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dodecl(NODECL, CXXX, $3, $4);
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| pexpr '(' zelist ')'
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$$ = new(OFUNC, $1, Z);
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dodecl(xdecl, CXXX, types[TINT], $$);
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$$->right = invert($3);
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| pexpr '[' cexpr ']'
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$$ = new(OIND, new(OADD, $1, $3), Z);
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$$ = new(ODOT, new(OIND, $1, Z), Z);
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$$ = new(ODOT, $1, Z);
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$$ = new(OPOSTINC, $1, Z);
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$$ = new(OPOSTDEC, $1, Z);
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$$ = new(OCONST, Z, Z);
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$$->type = types[TINT];
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$$->cstring = strdup(symb);
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$$ = new(OCONST, Z, Z);
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$$->type = types[TLONG];
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$$->cstring = strdup(symb);
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$$ = new(OCONST, Z, Z);
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$$->type = types[TUINT];
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$$->cstring = strdup(symb);
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$$ = new(OCONST, Z, Z);
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$$->type = types[TULONG];
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$$->cstring = strdup(symb);
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$$ = new(OCONST, Z, Z);
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$$->type = types[TDOUBLE];
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$$->cstring = strdup(symb);
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$$ = new(OCONST, Z, Z);
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$$->type = types[TFLOAT];
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$$->cstring = strdup(symb);
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$$ = new(OCONST, Z, Z);
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$$->type = types[TVLONG];
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$$->cstring = strdup(symb);
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$$ = new(OCONST, Z, Z);
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$$->type = types[TUVLONG];
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$$->cstring = strdup(symb);
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$$ = new(OSTRING, Z, Z);
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$$->type = typ(TARRAY, types[TCHAR]);
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$$->type->width = $1.l + 1;
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n = $1->type->width - 1;
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s = alloc(n+$2.l+MAXALIGN);
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memcpy(s, $1->cstring, n);
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memcpy(s+n, $2.s, $2.l);
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$$->type->width += $2.l;
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$$ = new(OLSTRING, Z, Z);
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$$->type = typ(TARRAY, types[TUSHORT]);
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$$->type->width = $1.l + sizeof(ushort);
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$$->rstring = (ushort*)$1.s;
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n = $1->type->width - sizeof(ushort);
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s = alloc(n+$2.l+MAXALIGN);
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memcpy(s, $1->rstring, n);
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memcpy(s+n, $2.s, $2.l);
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*(ushort*)(s+n+$2.l) = 0;
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$$->type->width += $2.l;
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$$->rstring = (ushort*)s;
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$$ = new(OLIST, $1, $3);
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$<tyty>$.t3 = lasttype;
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$<tyty>$.c = lastclass;
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lasttype = $<tyty>2.t3;
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lastclass = $<tyty>2.c;
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lasttype = types[TINT];
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$$.t = garbt($$.t, $1);
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$$.t = garbt($$.t, $2);
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if($2 & ~BCLASS & ~BGARB)
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diag(Z, "duplicate types given: %T and %Q", $1, $2);
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$$.t = simplet(typebitor($1, $2));
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$$.t = garbt($$.t, $2);
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| gcnlist complex zgnlist
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$$.t = garbt($$.t, $1|$3);
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$$.t = garbt($$.t, $1);
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| gcnlist tname gctnlist
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$$.t = simplet(typebitor($2, $3));
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$$.c = simplec($1|$3);
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$$.t = garbt($$.t, $1|$3);
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diag(Z, "illegal combination of class 4: %s", cnames[$1.c]);
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dotag($2, TSTRUCT, 0);
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dotag($2, TSTRUCT, autobn);
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diag(Z, "redeclare tag: %s", $2->name);
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sprint(symb, "_%d_", taggen);
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$$ = dotag(lookup(), TSTRUCT, autobn);
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dotag($2, TUNION, 0);
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dotag($2, TUNION, autobn);
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diag(Z, "redeclare tag: %s", $2->name);
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sprint(symb, "_%d_", taggen);
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$$ = dotag(lookup(), TUNION, autobn);
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dotag($2, TENUM, 0);
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$$->link = types[TINT];
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dotag($2, TENUM, autobn);
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diag(Z, "redeclare tag: %s", $2->name);
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diag(Z, "enum type ambiguous: %s", $2->name);
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en.tenum = types[TINT];
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$$->link = en.tenum;
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$$ = tcopy($1->type);
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$$ = typebitor($1, $2);
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$$ = typebitor($1, $2);
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$$ = typebitor($1, $2);
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tname: /* type words */
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LCHAR { $$ = BCHAR; }
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| LSHORT { $$ = BSHORT; }
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| LINT { $$ = BINT; }
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| LLONG { $$ = BLONG; }
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| LSIGNED { $$ = BSIGNED; }
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| LUNSIGNED { $$ = BUNSIGNED; }
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| LFLOAT { $$ = BFLOAT; }
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| LDOUBLE { $$ = BDOUBLE; }
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| LVOID { $$ = BVOID; }
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cname: /* class words */
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LAUTO { $$ = BAUTO; }
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| LSTATIC { $$ = BSTATIC; }
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| LEXTERN { $$ = BEXTERN; }
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| LTYPEDEF { $$ = BTYPEDEF; }
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| LTYPESTR { $$ = BTYPESTR; }
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| LREGISTER { $$ = BREGISTER; }
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| LINLINE { $$ = 0; }
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gname: /* garbage words */
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LCONSTNT { $$ = BCONSTNT; }
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| LVOLATILE { $$ = BVOLATILE; }
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| LRESTRICT { $$ = 0; }
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$$ = new(ONAME, Z, Z);
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if($1->class == CLOCAL)
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$$->type = $1->type;
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$$->etype = $$->type->etype;
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$$->xoffset = $1->offset;
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$$->class = $1->class;
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$$ = new(ONAME, Z, Z);
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$$->type = $1->type;
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$$->etype = $$->type->etype;
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$$->xoffset = $1->offset;
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$$->class = $1->class;
added
removed
src/cmd/cc/cc.y
