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Improve the display of sizes.
[bison.git] / etc / bench.pl.in
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3cedc2dc
AD		 1#! /usr/bin/perl -w
2
9ca7f077 3# Copyright (C) 2006, 2008 Free Software Foundation, Inc.
f16b0819 4#
3cedc2dc 5# This file is part of Bison, the GNU Compiler Compiler.
f16b0819
PE		 6#
7# This program is free software: you can redistribute it and/or modify
3cedc2dc 8# it under the terms of the GNU General Public License as published by
f16b0819
PE		 9# the Free Software Foundation, either version 3 of the License, or
10# (at your option) any later version.
11#
12# This program is distributed in the hope that it will be useful,
3cedc2dc
AD		 13# but WITHOUT ANY WARRANTY; without even the implied warranty of
14# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15# GNU General Public License for more details.
f16b0819 16#
3cedc2dc 17# You should have received a copy of the GNU General Public License
f16b0819
PE		 18# along with this program. If not, see <http://www.gnu.org/licenses/>.
19
15129f25
AD		 20=head1 NAME
21
22bench.pl - perform benches on Bison parsers.
23
24=head1 SYNOPSIS
25
26 ./bench.pl
27
7e5f9c54
AD		 28=head1 OPTIONS
29
e1b74b92
AD		 30=over 4
31
a6df593d
AD		 32=item B<-b>, B<--bench>=I<bench-name>
33
34Specify the set of benches to run. I<bench-name> should be one of:
35
36=over 4
37
38=item I<fusion>
39
40Test F<lalr1.cc> with three stacks against F<lalr1-fusion.cc> which
41uses a single one.
42
43=item I<push>
44
45Test the push parser vs. the pull interface. Use the C parser.
46
47=item I<variant>
48
49Test the use of variants instead of union in the C++ parser.
50
51=back
52
7e5f9c54
AD		 53=item B<-c>, B<--cflags>=I<flags>
54
ef05c4d6
AD		 55Flags to pass to the C or C++ compiler. Defaults to -O2.
56
57=item B<-h>, B<--help>
58
59Display this message and exit succesfully. The more verbose, the more
60details.
7e5f9c54
AD		 61
62=item B<-i>, B<--iterations>=I<integer>
63
d11ee647
AD		 64Say how many times a single test of the bench must be run. If
65negative, specify the minimum number of CPU seconds to run. Defaults
ef05c4d6
AD		 66to -1.
67
68=item B<-q>, B<--quiet>
69
70Decrease the verbosity level (defaults to 1).
7e5f9c54
AD		 71
72=item B<-v>, B<--verbose>
73
ef05c4d6 74Raise the verbosity level (defaults to 1).
7e5f9c54 75
e1b74b92
AD		 76=back
77
15129f25
AD		 78=cut
79
3cedc2dc 80use IO::File;
3cedc2dc 81
e1b74b92
AD		 82##################################################################
83
84=head1 VARIABLES
85
86=over 4
87
88=item C<$bison>
89
90The Bison program to use to compile the grammar.
91
92=item C<$cc>
93
94The C compiler.
95
96=item C<$cxx>
97
98The C++ compiler.
99
100=item C<$cflags>
101
102Compiler flags (C or C++).
103
104=item C<$iterations>
105
106The number of times the parser is run for a bench.
107
108=item C<$verbose>
109
110Verbosity level.
111
112=back
113
114=cut
115
2e7944cb 116my $bison = $ENV{'BISON'} || '@abs_top_builddir@/tests/bison';
3cedc2dc 117my $cc = $ENV{'CC'} || 'gcc';
7109a18d 118my $cxx = $ENV{'CXX'} || 'g++';
ef05c4d6
AD		 119my $cflags = '-O2';
120my $iterations = -1;
121my $verbose = 1;
3cedc2dc 122
e1b74b92 123=head1 FUNCTIONS
3cedc2dc 124
e1b74b92 125=over 4
7e5f9c54 126
e1b74b92 127=item C<verbose($level, $message)>
15129f25 128
e1b74b92
AD		 129Report the C<$message> is C<$level> E<lt>= C<$verbose>.
130
131=cut
132
133sub verbose($$)
134{
135 my ($level, $message) = @_;
136 print STDERR $message
137 if $level <= $verbose;
138}
15129f25 139
922730fe
AD		 140=item C<directives($bench, @directive)>
141
142Format the list of directives for Bison for bench named C<$bench>.
143
7109a18d
AD		 144The special fake C<%variant> directive requests the use of
145Boost.Variants instead of a regular union. So don't pass it, it is
146not a valid directive.
147
922730fe
AD		 148=cut
149
150sub directives($@)
151{
5b421a4e 152 my ($bench, @directive) = @_;
922730fe 153 my $res = "/* Directives for bench `$bench'. */\n";
5b421a4e 154 for my $d (@directive)
7109a18d
AD		 155 {
156 $res .= $d . "\n"
157 unless $d eq '%variant';
158 }
922730fe
AD		 159 $res .= "/* End of directives for bench `$bench'. */\n";
160 return $res;
161}
162
5b421a4e 163=item C<triangular_grammar ($base, $max, @directive)>
15129f25
AD		 164
165Create a large triangular grammar which looks like :
166
167 input:
168 exp { if ($1 != 0) abort (); $$ = $1; }
169 | input exp { if ($2 != $1 + 1) abort (); $$ = $2; }
170 ;
171
172 exp:
173 END { $$ = 0; }
174 | "1" END { $$ = 1; }
175 | "1" "2" END { $$ = 2; }
176 | "1" "2" "3" END { $$ = 3; }
177 | "1" "2" "3" "4" END { $$ = 4; }
178 | "1" "2" "3" "4" "5" END { $$ = 5; }
179 ;
180
7e5f9c54 181C<$base> is the base name for the file to create (F<$base.y>).
15129f25 182C<$max> is the number of such rules (here, 5). You may pass
5b421a4e 183additional Bison C<@directive>.
15129f25
AD		 184
185The created parser is self contained: it includes its scanner, and
186source of input.
187=cut
188
3cedc2dc
AD		 189sub triangular_grammar ($$$)
190{
5b421a4e
AD		 191 my ($base, $max, @directive) = @_;
192 my $directives = directives ($base, @directive);
3cedc2dc
AD		 193
194 my $out = new IO::File ">$base.y"
195 or die;
196 print $out <<EOF;
197%error-verbose
198%debug
199%{
200#include <stdio.h>
201#include <stdlib.h>
202
203static int yylex (void);
204static void yyerror (const char *msg);
205%}
922730fe 206$directives
3cedc2dc
AD		 207%union
208{
209 int val;
210};
211
212%token END "end"
213%type <val> exp input
214EOF
215
216 for my $size (1 .. $max)
217 {
218 print $out "%token t$size $size \"$size\"\n";
219 };
220
221print $out <<EOF;
222%%
223input:
224 exp { if (\$1 != 0) abort (); \$\$ = \$1; }
225| input exp { if (\$2 != \$1 + 1) abort (); \$\$ = \$2; }
226;
227
228exp:
229 END
230 { \$\$ = 0; }
231EOF
232
233for my $size (1 .. $max)
234 {
235 use Text::Wrap;
236 print $out wrap ("| ", " ",
237 (map { "\"$_\"" } (1 .. $size)),
238 " END \n"),
239 " { \$\$ = $size; }\n";
240 };
241print $out ";\n";
242
243print $out <<EOF;
244%%
245static int
246yylex (void)
247{
248 static int inner = 1;
249 static int outer = 0;
250 if (outer > $max)
251 return 0;
252 else if (inner > outer)
253 {
254 inner = 1;
255 ++outer;
256 return END;
257 }
258 return inner++;
259}
260
261static void
262yyerror (const char *msg)
263{
264 fprintf (stderr, "%s\\n", msg);
265}
266
267int
268main (void)
269{
270 yydebug = !!getenv ("YYDEBUG");
271 return yyparse ();
272}
273EOF
274}
275
276##################################################################
277
15129f25
AD		 278=item C<calc_input ($base, $max)>
279
7e5f9c54 280Generate the input file F<$base.input> for the calc parser. The input
15129f25
AD		 281is composed of two expressions. The first one is using left recursion
282only and consumes no stack. The second one requires a deep stack.
283These two expressions are repeated C<$max> times in the output file.
284
285=cut
286
3cedc2dc
AD		 287sub calc_input ($$)
288{
289 my ($base, $max) = @_;
290 my $out = new IO::File ">$base.input"
291 or die;
292 foreach (1 .. $max)
293 {
294 print $out "0+1+2+3+4+5+6+7+8+9+10+11+12+13+14+15+16+17+18+19+20+21+22+23+24+25+26+27+28+29+30+31+32+33+34+35+36+37+38+39+40+41+42+43+44+45+46+47+48+49+50+51+52+53+54+55+56+57+58+59+60+61+62+63+64+65+66+67+68+69+70+71+72+73+74+75+76+77+78+79+80+81+82+83+84+85+86+87+88+89+90+91+92+93+94+95+96+97+98+99\n";
295 print $out "1+1*(2+2*(3+3*(4+4*(5+5*(6+6*(7+7*(8+8*(9+9*(10+10*(11+11*(12+12*(13+13*(14+14*(15+15*(16+16*(17+17*(18+18*(19+19*(20+20*(21+21*(22+22*(23+23*(24+24*(25+25*(26+26*(27+27*(28+28*(29+29*(30+30*(31+31*(32+32*(33+33*(34+34*(35+35*(36+36*(37+37*(38+38*(39+39*(40+40*(41+41*(42+42*(43+43*(44+44*(45+45*(46+46*(47+47*(48+48*(49+49*(50+50*(51+51*(52+52*(53+53*(54+54*(55+55*(56+56*(57+57*(58+58*(59+59*(60+60*(61+61*(62+62*(63+63*(64+64*(65+65*(66+66*(67+67*(68+68*(69+69*(70+70*(71+71*(72+72*(73+73*(74+74*(75+75*(76+76*(77+77*(78+78*(79+79*(80+80*(81+81*(82+82*(83+83*(84+84*(85+85*(86+86*(87+87*(88+88*(89+89*(90+90*(91+91*(92+92*(93+93*(94+94*(95+95*(96+96*(97+97*(98+98*(99+99*(100+100*(101+101*(102+102*(103+103*(104+104*(105+105*(106+106*(107+107*(108+108*(109+109*(110+110*(111+111*(112+112*(113+113*(114+114*(115+115*(116+116*(117+117*(118+118*(119+119*(120+120*(121+121*(122+122*(123+123*(124+124*(125+125*(126+126*(127+127*(128+128*(129+129*(130+130*(131+131*(132+132*(133+133*(134+134*(135+135*(136+136*(137+137*(138+138*(139+139*(140+140*(141+141*(142+142*(143+143*(144+144*(145+145*(146+146*(147+147*(148+148*(149+149*(150+150*(151+151*(152+152*(153+153*(154+154*(155+155*(156+156*(157+157*(158+158*(159+159*(160+160*(161+161*(162+162*(163+163*(164+164*(165+165*(166+166*(167+167*(168+168*(169+169*(170+170*(171+171*(172+172*(173+173*(174+174*(175+175*(176+176*(177+177*(178+178*(179+179*(180+180*(181+181*(182+182*(183+183*(184+184*(185+185*(186+186*(187+187*(188+188*(189+189*(190+190*(191+191*(192+192*(193+193*(194+194*(195+195*(196+196*(197+197*(198+198*(199+199*(200+200*(201+201*(202+202*(203+203*(204+204*(205+205*(206+206*(207+207*(208+208*(209+209*(210+210*(211+211*(212+212*(213+213*(214+214*(215+215*(216+216*(217+217*(218+218*(219+219*(220+220*(221+221*(222+222*(223+223*(224+224*(225+225*(226+226*(227+227*(228+228*(229+229*(230+230*(231+231*(232+232*(233+233*(234+234*(235+235*(236+236*(237+237*(238+238*(239+239*(240+240*(241+241*(242+242*(243+243*(244+244*(245+245*(246+246*(247+247*(248+248*(249+249*(250+250*(251+251*(252+252*(253+253*(254+254*(255+255*(256+256*(257+257*(258+258*(259+259*(260+260*(261+261*(262+262*(263+263*(264+264*(265+265*(266+266*(267+267*(268+268*(269+269*(270+270*(271+271*(272+272*(273+273*(274+274*(275+275*(276+276*(277+277*(278+278*(279+279*(280+280*(281+281*(282+282*(283+283*(284+284*(285+285*(286+286*(287+287*(288+288*(289+289*(290+290*(291+291*(292+292*(293+293*(294+294*(295+295*(296+296*(297+297*(298+298*(299+299*(300+300*(301+301*(302+302*(303+303*(304+304*(305+305*(306+306*(307+307*(308+308*(309+309*(310+310*(311+311*(312+312*(313+313*(314+314*(315+315*(316+316*(317+317*(318+318*(319+319*(320+320*(321+321*(322+322*(323+323*(324+324*(325+325*(326+326*(327+327*(328+328*(329+329*(330+330*(331+331*(332+332*(333+333*(334+334*(335+335*(336+336*(337+337*(338+338*(339+339*(340+340*(341+341*(342+342*(343+343*(344+344*(345+345*(346+346*(347+347*(348+348*(349+349*(350+350*(351+351*(352+352*(353+353*(354+354*(355+355*(356+356*(357+357*(358+358*(359+359*(360+360*(361+361*(362+362*(363+363*(364+364*(365+365*(366+366*(367+367*(368+368*(369+369*(370+370*(371+371*(372+372*(373+373*(374+374*(375+375*(376+376*(377+377*(378+378*(379+379*(380+380*(381+381*(382+382*(383+383*(384+384*(385+385*(386+386*(387+387*(388+388*(389+389*(390+390*(391+391*(392+392*(393+393*(394+394*(395+395*(396+396*(397+397*(398+398*(399+399*(400+400*(401+401*(402+402*(403+403*(404+404*(405+405*(406+406*(407+407*(408+408*(409+409*(410+410*(411+411*(412+412*(413+413*(414+414*(415+415*(416+416*(417+417*(418+418*(419+419*(420+420*(421+421*(422+422*(423+423*(424+424*(425+425*(426+426*(427+427*(428+428*(429+429*(430+430*(431+431*(432+432*(433+433*(434+434*(435+435*(436+436*(437+437*(438+438*(439+439*(440+440*(441+441*(442+442*(443+443*(444+444*(445+445*(446+446*(447+447*(448+448*(449+449*(450+450*(451+451*(452+452*(453+453*(454+454*(455+455*(456+456*(457+457*(458+458*(459+459*(460+460*(461+461*(462+462*(463+463*(464+464*(465+465*(466+466*(467+467*(468+468*(469+469*(470+470*(471+471*(472+472*(473+473*(474+474*(475+475*(476+476*(477+477*(478+478*(479+479*(480+480*(481+481*(482+482*(483+483*(484+484*(485+485*(486+486*(487+487*(488+488*(489+489*(490+490*(491+491*(492+492*(493+493*(494+494*(495+495*(496+496*(497+497*(498+498*(499+499*(500+500*(501+501*(502+502*(503+503*(504+504*(505+505*(506+506*(507+507*(508+508*(509+509*(510+510*(511+511*(512+512*(513+513*(514+514*(515+515*(516+516*(517+517*(518+518*(519+519*(520+520*(521+521*(522+522*(523+523*(524+524*(525+525*(526+526*(527+527*(528+528*(529+529*(530+530*(531+531*(532+532*(533+533*(534+534*(535+535*(536+536*(537+537*(538+538*(539+539*(540+540*(541+541*(542+542*(543+543*(544+544*(545+545*(546+546*(547+547*(548+548*(549+549*(550+550*(551+551*(552+552*(553+553*(554+554*(555+555*(556+556*(557+557*(558+558*(559+559*(560+560*(561+561*(562+562*(563+563*(564+564*(565+565*(566+566*(567+567*(568+568*(569+569*(570+570*(571+571*(572+572*(573+573*(574+574*(575+575*(576+576*(577+577*(578+578*(579+579*(580+580*(581+581*(582+582*(583+583*(584+584*(585+585*(586+586*(587+587*(588+588*(589+589*(590+590*(591+591*(592+592*(593+593*(594+594*(595+595*(596+596*(597+597*(598+598*(599+599*(600+600*(601+601*(602+602*(603+603*(604+604*(605+605*(606+606*(607+607*(608+608*(609+609*(610+610*(611+611*(612+612*(613+613*(614+614*(615+615*(616+616*(617+617*(618+618*(619+619*(620+620*(621+621*(622+622*(623+623*(624+624*(625+625*(626+626*(627+627*(628+628*(629+629*(630+630*(631+631*(632+632*(633+633*(634+634*(635+635*(636+636*(637+637*(638+638*(639+639*(640+640*(641+641*(642+642*(643+643*(644+644*(645+645*(646+646*(647+647*(648+648*(649+649*(650+650*(651+651*(652+652*(653+653*(654+654*(655+655*(656+656*(657+657*(658+658*(659+659*(660+660*(661+661*(662+662*(663+663*(664+664*(665+665*(666+666*(667+667*(668+668*(669+669*(670+670*(671+671*(672+672*(673+673*(674+674*(675+675*(676+676*(677+677*(678+678*(679+679*(680+680*(681+681*(682+682*(683+683*(684+684*(685+685*(686+686*(687+687*(688+688*(689+689*(690+690*(691+691*(692+692*(693+693*(694+694*(695+695*(696+696*(697+697*(698+698*(699+699*(700+700*(701+701*(702+702*(703+703*(704+704*(705+705*(706+706*(707+707*(708+708*(709+709*(710+710*(711+711*(712+712*(713+713*(714+714*(715+715*(716+716*(717+717*(718+718*(719+719*(720+720*(721+721*(722+722*(723+723*(724+724*(725+725*(726+726*(727+727*(728+728*(729+729*(730+730*(731+731*(732+732*(733+733*(734+734*(735+735*(736+736*(737+737*(738+738*(739+739*(740+740*(741+741*(742+742*(743+743*(744+744*(745+745*(746+746*(747+747*(748+748*(749+749*(750+750*(751+751*(752+752*(753+753*(754+754*(755+755*(756+756*(757+757*(758+758*(759+759*(760+760*(761+761*(762+762*(763+763*(764+764*(765+765*(766+766*(767+767*(768+768*(769+769*(770+770*(771+771*(772+772*(773+773*(774+774*(775+775*(776+776*(777+777*(778+778*(779+779*(780+780*(781+781*(782+782*(783+783*(784+784*(785+785*(786+786*(787+787*(788+788*(789+789*(790+790*(791+791*(792+792*(793+793*(794+794*(795+795*(796+796*(797+797*(798+798*(799+799*(800+800*(801+801*(802+802*(803+803*(804+804*(805+805*(806+806*(807+807*(808+808*(809+809*(810+810*(811+811*(812+812*(813+813*(814+814*(815+815*(816+816*(817+817*(818+818*(819+819*(820+820*(821+821*(822+822*(823+823*(824+824*(825+825*(826+826*(827+827*(828+828*(829+829*(830+830*(831+831*(832+832*(833+833*(834+834*(835+835*(836+836*(837+837*(838+838*(839+839*(840+840*(841+841*(842+842*(843+843*(844+844*(845+845*(846+846*(847+847*(848+848*(849+849*(850+850*(851+851*(852+852*(853+853*(854+854*(855+855*(856+856*(857+857*(858+858*(859+859*(860+860*(861+861*(862+862*(863+863*(864+864*(865+865*(866+866*(867+867*(868+868*(869+869*(870+870*(871+871*(872+872*(873+873*(874+874*(875+875*(876+876*(877+877*(878+878*(879+879*(880+880*(881+881*(882+882*(883+883*(884+884*(885+885*(886+886*(887+887*(888+888*(889+889*(890+890*(891+891*(892+892*(893+893*(894+894*(895+895*(896+896*(897+897*(898+898*(899+899*(900+900*(901+901*(902+902*(903+903*(904+904*(905+905*(906+906*(907+907*(908+908*(909+909*(910+910*(911+911*(912+912*(913+913*(914+914*(915+915*(916+916*(917+917*(918+918*(919+919*(920+920*(921+921*(922+922*(923+923*(924+924*(925+925*(926+926*(927+927*(928+928*(929+929*(930+930*(931+931*(932+932*(933+933*(934+934*(935+935*(936+936*(937+937*(938+938*(939+939*(940+940*(941+941*(942+942*(943+943*(944+944*(945+945*(946+946*(947+947*(948+948*(949+949*(950+950*(951+951*(952+952*(953+953*(954+954*(955+955*(956+956*(957+957*(958+958*(959+959*(960+960*(961+961*(962+962*(963+963*(964+964*(965+965*(966+966*(967+967*(968+968*(969+969*(970+970*(971+971*(972+972*(973+973*(974+974*(975+975*(976+976*(977+977*(978+978*(979+979*(980+980*(981+981*(982+982*(983+983*(984+984*(985+985*(986+986*(987+987*(988+988*(989+989*(990+990*(991+991*(992+992*(993+993*(994+994*(995+995*(996+996*(997+997*(998+998*(999+999*(1000+1000*(1001))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))\n";
296 }
297}
298
299##################################################################
5b421a4e 300=item C<calc_grammar ($base, $max, @directive)>
15129f25 301
7e5f9c54 302Generate a Bison file F<$base.y> for a calculator parser in C. Pass
5b421a4e 303the additional Bison C<@directive>. C<$max> is ignored, but left to
7109a18d 304have the same interface as C<triangular_grammar>.
15129f25
AD		 305
306=cut
3cedc2dc
AD		 307
308sub calc_grammar ($$$)
309{
5b421a4e
AD		 310 my ($base, $max, @directive) = @_;
311 my $directives = directives ($base, @directive);
3cedc2dc
AD		 312
313 my $out = new IO::File ">$base.y"
314 or die;
315 print $out <<EOF;
316%{
317#include <stdio.h>
318
319#include <stdlib.h>
320#include <string.h>
321#include <ctype.h>
322#define USE(Var)
323
324/* Exercise pre-prologue dependency to %union. */
325typedef int semantic_value;
326
327static semantic_value global_result = 0;
328static int global_count = 0;
329%}
330
3cedc2dc
AD		 331$directives
332%error-verbose
922730fe 333/* Exercise %union. */
3cedc2dc
AD		 334%union
335{
336 semantic_value ival;
337};
338
339%{
340static int power (int base, int exponent);
341/* yyerror receives the location if:
342 - %location & %pure & %glr
343 - %location & %pure & %yacc & %parse-param. */
344static void yyerror (const char *s);
345#if YYPURE
346static int yylex (YYSTYPE* yylvalp);
347#else
348static int yylex (void);
349#endif
350%}
351
352/* Bison Declarations */
353%token CALC_EOF 0 "end of input"
354%token <ival> NUM "number"
355%type <ival> exp
356
357%nonassoc '=' /* comparison */
358%left '-' '+'
359%left '*' '/'
360%left NEG /* negation--unary minus */
361%right '^' /* exponentiation */
362
363/* Grammar follows */
364%%
365input:
366 line
367| input line
368;
369
370line:
371 '\\n'
372| exp '\\n' { USE (\$1); }
373;
374
375exp:
376 NUM { \$\$ = \$1; }
377| exp '=' exp
378 {
379 if (\$1 != \$3)
380 fprintf (stderr, "calc: error: %d != %d\\n", \$1, \$3);
381 \$\$ = \$1;
382 }
383| exp '+' exp { \$\$ = \$1 + \$3; }
384| exp '-' exp { \$\$ = \$1 - \$3; }
385| exp '*' exp { \$\$ = \$1 * \$3; }
386| exp '/' exp { \$\$ = \$1 / \$3; }
387| '-' exp %prec NEG { \$\$ = -\$2; }
388| exp '^' exp { \$\$ = power (\$1, \$3); }
389| '(' exp ')' { \$\$ = \$2; }
390| '(' error ')' { \$\$ = 1111; }
391| '!' { \$\$ = 0; YYERROR; }
392| '-' error { \$\$ = 0; YYERROR; }
393;
394%%
395/* The input. */
396static FILE *input;
397
398static void
399yyerror (const char *s)
400{
401 fprintf (stderr, "%s\\n", s);
402}
403
404static int
405get_char (void)
406{
407 return getc (input);
408}
409
410
411static void
412unget_char ( int c)
413{
414 ungetc (c, input);
415}
416
417static int
418read_signed_integer (void)
419{
420 int c = get_char ();
421 int sign = 1;
422 int n = 0;
423
424 if (c == '-')
425 {
426 c = get_char ();
427 sign = -1;
428 }
429
430 while (isdigit (c))
431 {
432 n = 10 * n + (c - '0');
433 c = get_char ();
434 }
435
436 unget_char (c);
437
438 return sign * n;
439}
440
3cedc2dc
AD		 441static int
442#if YYPURE
443# define yylval (*yylvalp)
444yylex (YYSTYPE* yylvalp)
445#else
446yylex (void)
447#endif
448{
449 int c;
450
451 /* Skip white space. */
452 while ((c = get_char ()) == ' ' || c == '\t')
0925d5bf 453 continue;
3cedc2dc
AD		 454
455 /* process numbers */
456 if (c == '.' || isdigit (c))
457 {
458 unget_char ( c);
459 yylval.ival = read_signed_integer ();
460 return NUM;
461 }
462
463 /* Return end-of-file. */
464 if (c == EOF)
465 return CALC_EOF;
466
467 /* Return single chars. */
468 return c;
469}
470
471static int
472power (int base, int exponent)
473{
474 int res = 1;
475 if (exponent < 0)
476 exit (3);
477 for (/* Niente */; exponent; --exponent)
478 res *= base;
479 return res;
480}
481
482
3cedc2dc
AD		 483int
484main (int argc, const char **argv)
485{
486 semantic_value result = 0;
487 int count = 0;
488 int status;
489
490 input = fopen ("calc.input", "r");
491 if (!input)
492 {
493 perror ("calc.input");
494 return 3;
495 }
496
497 status = yyparse ();
498 if (global_result != result)
499 abort ();
500 if (global_count != count)
501 abort ();
502
503 return status;
504}
505EOF
506}
507
508##################################################################
509
5b421a4e 510=item C<variant_grammar ($base, $max, @directive)>
7109a18d 511
7e5f9c54 512Generate a Bison file F<$base.y> that uses, or not, the Boost.Variants
5b421a4e 513depending on the C<@directive>.
7109a18d
AD		 514
515=cut
516
517sub variant_grammar ($$$)
518{
5b421a4e
AD		 519 my ($base, $max, @directive) = @_;
520 my $directives = directives ($base, @directive);
521 my $variant = grep { $_ eq '%variant' } @directive;
7109a18d
AD		 522
523 my $out = new IO::File ">$base.y"
524 or die;
525 print $out <<EOF;
7109a18d
AD		 526%language "C++"
527%defines
5b421a4e 528$directives
7109a18d 529
5b421a4e 530%code requires // variant.h
7109a18d
AD		 531{
532#include <string>
533}
534
5b421a4e 535%code // variant.c
7109a18d
AD		 536{
537#include <algorithm>
538#include <iostream>
539#include <sstream>
540
541// Prototype of the yylex function providing subsequent tokens.
542static yy::parser::token_type yylex(yy::parser::semantic_type* yylval);
543
7e5f9c54 544#define STAGE_MAX ($max * 10)
7109a18d
AD		 545#define USE_VARIANTS $variant
546#if USE_VARIANTS
547# define IF_VARIANTS(True, False) True
548#else
549# define IF_VARIANTS(True, False) False
550#endif
551}
552EOF
553
554 if ($variant)
555 {
556 print $out <<'EOF';
557%code variant {int,std::string}
558%token <std::string> TEXT
559%token <int> NUMBER
560%printer { std::cerr << "Number: " << $$; } <int>
561%printer { std::cerr << "Text: " << $$; } <std::string>
562%token END_OF_FILE 0
563%type <std::string> text result
564
565%%
566result:
567 text { /* Throw away the result. */ }
568;
569
570text:
571 /* nothing */ { /* This will generate an empty string */ }
572| text TEXT { std::swap($$,$1); $$.append($2); }
573| text NUMBER {
574 std::swap($$,$1);
575 std::ostringstream ss;
576 ss << ' ' << $2;
577 $$.append(ss.str());
578 }
579;
580EOF
581 }
582 else
583 {
584 # Not using Boost variants.
585 print $out <<'EOF';
586%union {int ival; std::string* sval;}
587%token <sval> TEXT
588%token <ival> NUMBER
589%printer { std::cerr << "Number: " << $$; } <ival>
590%printer { std::cerr << "Text: " << *$$; } <sval>
591%token END_OF_FILE 0
592%type <sval> text result
593
594%%
595result:
596 text { delete $1; }
597;
598
599text:
600 /* nothing */ { $$ = new std::string; }
601| text TEXT { $$->append(*$2); delete $2; }
602| text NUMBER {
603 std::ostringstream ss;
604 ss << ' ' << $2;
605 $$->append(ss.str());
606 }
607;
608EOF
609 }
610
611 print $out <<'EOF';
612%%
613static
614yy::parser::token_type
615yylex(yy::parser::semantic_type* yylval)
616{
617 static int stage = -1;
618 ++stage;
619 if (stage == STAGE_MAX)
620 return yy::parser::token::END_OF_FILE;
621 else if (stage % 2)
622 {
a6df593d 623 IF_VARIANTS(yylval->build<int>(), yylval->ival) = stage;
7109a18d
AD		 624 return yy::parser::token::NUMBER;
625 }
626 else
627 {
a6df593d 628 IF_VARIANTS(yylval->build<std::string>() =, yylval->sval = new) std::string("A string.");
7109a18d
AD		 629 return yy::parser::token::TEXT;
630 }
631 abort();
632}
633
634// Mandatory error function
635void
636yy::parser::error(const yy::parser::location_type& yylloc,
637 const std::string& message)
638{
639 std::cerr << yylloc << ": " << message << std::endl;
640}
641
642int main(int argc, char *argv[])
643{
644 yy::parser p;
5b421a4e 645#if YYDEBUG
7109a18d 646 p.set_debug_level(!!getenv("YYDEBUG"));
5b421a4e 647#endif
7109a18d
AD		 648 p.parse();
649 return 0;
650}
651EOF
652}
653
654##################################################################
655
15129f25
AD		 656=item C<compile ($base)>
657
7109a18d
AD		 658Compile C<$base.y> to an executable C, Using the C or C++ compiler
659depending on the %language specification in C<$base.y>.
15129f25
AD		 660
661=cut
662
3cedc2dc
AD		 663sub compile ($)
664{
665 my ($base) = @_;
7109a18d
AD		 666 my $language = `sed -ne '/%language "\\(.*\\)"/{s//\\1/;p;q;}' $base.y`;
667 chomp $language;
668
669 my $compiler = $language eq 'C++' ? $cxx : $cc;
670
3cedc2dc
AD		 671 system ("$bison $base.y -o $base.c") == 0
672 or die;
7e5f9c54 673 system ("$compiler -o $base $cflags $base.c") == 0
3cedc2dc
AD		 674 or die;
675}
676
7484f1d4 677=item C<bench_grammar ($gram, %bench)>
15129f25
AD		 678
679Generate benches for C<$gram>. C<$gram> should be C<calc> or
7484f1d4
AD		 680C<triangle>. C<%bench> is a hash of the form:
681
5b421a4e 682 $name => @directive
7484f1d4 683
5b421a4e 684where C<$name> is the name of the bench, and C<@directive> are the
7484f1d4
AD		 685Bison directive to use for this bench. All the benches are compared
686against each other, repeated 50 times.
15129f25
AD		 687
688=cut
689
7484f1d4 690sub bench_grammar ($%)
3cedc2dc 691{
7484f1d4 692 my ($gram, %test) = @_;
f16b0819 693
d11ee647
AD		 694 use Benchmark qw (:all :hireswallclock);
695
7484f1d4 696 # Set up the benches as expected by timethese.
3cedc2dc 697 my %bench;
d11ee647
AD		 698 # For each bench, capture the size.
699 my %size;
3cedc2dc
AD		 700 while (my ($name, $directives) = each %test)
701 {
ef05c4d6 702 verbose 2, "Generating $name\n";
7484f1d4 703 # Call the Bison input file generator.
3cedc2dc 704 my $generator = "$gram" . "_grammar";
922730fe 705 &$generator ($name, 200, @$directives);
5b421a4e 706 # Compile the executable.
3cedc2dc
AD		 707 compile ($name);
708 $bench{$name} = "system ('./$name');";
d11ee647 709 chop($size{$name} = `wc -c <$name`);
3cedc2dc
AD		 710 }
711
7484f1d4 712 # Run the benches.
d11ee647
AD		 713 #
714 # STYLE can be any of 'all', 'none', 'noc', 'nop' or 'auto'. 'all'
715 # shows each of the 5 times available ('wallclock' time, user time,
716 # system time, user time of children, and system time of
717 # children). 'noc' shows all except the two children times. 'nop'
718 # shows only wallclock and the two children times. 'auto' (the
719 # default) will act as 'all' unless the children times are both
720 # zero, in which case it acts as 'noc'. 'none' prevents output.
ef05c4d6 721 verbose 2, "Running the benches for $gram\n";
7e5f9c54 722 my $res = timethese ($iterations, \%bench, 'nop');
d11ee647
AD		 723
724 # Output the speed result.
3cedc2dc 725 cmpthese ($res, 'nop');
d11ee647
AD		 726
727 # Display the sizes.
cac9e09b 728 print "Sizes (decreasing):\n";
0cc5bead 729 my $width = 10;
d11ee647
AD		 730 for my $bench (keys %size)
731 {
0cc5bead
AD		 732 $width = length $bench
733 if $width < length $bench;
734 }
cac9e09b
AD		 735 # Benches sorted by decreasing size.
736 my @benches_per_size = sort {$size{$b} <=> $size{$a}} keys %size;
737 for my $bench (@benches_per_size)
0cc5bead 738 {
cac9e09b 739 printf "%${width}s: %5.2fkB\n", $bench, $size{$bench} / 1024;
d11ee647 740 }
3cedc2dc
AD		 741}
742
7484f1d4
AD		 743
744=item C<bench_push_parser ()>
745
746Bench the C push parser against the pull parser, pure and impure
747interfaces.
748
749=cut
750
751sub bench_push_parser ()
752{
7484f1d4
AD		 753 calc_input ('calc', 200);
754 bench_grammar
755 ('calc',
756 (
922730fe
AD		 757 "pull-impure" => [],
758 "pull-pure" => ['%define api.pure'],
759 "push-impure" => ['%define api.push_pull "both"'],
760 "push-pure" => ['%define api.push_pull "both"', '%define api.pure'],
7484f1d4
AD		 761 )
762 );
763}
764
7109a18d
AD		 765=item C<bench_variant_parser ()>
766
767Bench the C++ lalr1.cc parser using Boost.Variants or %union.
768
769=cut
770
771sub bench_variant_parser ()
772{
773 bench_grammar
774 ('variant',
775 (
a6df593d
AD		 776 "f-union" => ['%skeleton "lalr1-fusion.cc"'],
777 "f-uni-deb" => ['%skeleton "lalr1-fusion.cc"', '%debug'],
778 "f-var" => ['%skeleton "lalr1-fusion.cc"', '%variant'],
779 "f-var-deb" => ['%skeleton "lalr1-fusion.cc"', '%debug', '%variant'],
780 "f-var-dtr" => ['%skeleton "lalr1-fusion.cc"', '%variant', "%code {\n#define VARIANT_DESTROY\n}"],
781 "f-var-deb-dtr" => ['%skeleton "lalr1-fusion.cc"', '%debug', '%variant', "%code {\n#define VARIANT_DESTROY\n}"],
7109a18d
AD		 782 )
783 );
784}
785
429b4848
AD		 786=item C<bench_fusion_parser ()>
787
788Bench the C++ lalr1.cc parser using Boost.Variants or %union.
789
790=cut
791
792sub bench_fusion_parser ()
793{
794 bench_grammar
795 ('variant',
796 (
797 "split" => [],
798 "fused" => ['%skeleton "lalr1-fusion.cc"'],
799 )
800 );
801}
802
7109a18d
AD		 803############################################################################
804
7e5f9c54
AD		 805sub help ($)
806{
807 my ($verbose) = @_;
808 use Pod::Usage;
809 # See <URL:http://perldoc.perl.org/pod2man.html#NOTES>.
810 pod2usage( { -message => "Bench Bison parsers",
811 -exitval => 0,
812 -verbose => $verbose,
813 -output => \*STDOUT });
814}
815
816sub getopt ()
817{
818 use Getopt::Long;
a6df593d
AD		 819 %option = (
820 "b|bench=s" => \$bench,
821 "c|cflags=s" => \$cflags,
822 "h|help" => sub { help ($verbose) },
823 "i|iterations=i" => \$iterations,
ef05c4d6 824 "q|quiet" => sub { --$verbose },
a6df593d
AD		 825 "v|verbose" => sub { ++$verbose },
826 );
7e5f9c54
AD		 827 Getopt::Long::Configure ("bundling", "pass_through");
828 GetOptions (%option)
829 or exit 1;
830}
831
832######################################################################
833
834getopt;
e1b74b92
AD		 835verbose 1, "Using bison=$bison.\n";
836verbose 1, "Using cc=$cc.\n";
837verbose 1, "Using cxx=$cxx.\n";
838verbose 1, "Using cflags=$cflags.\n";
a6df593d
AD		 839
840bench_fusion_parser() if $bench eq "fusion";
841bench_push_parser() if $bench eq "push";
842bench_variant_parser() if $bench eq "variant";
3cedc2dc
AD		 843
844### Setup "GNU" style for perl-mode and cperl-mode.
845## Local Variables:
846## perl-indent-level: 2
847## perl-continued-statement-offset: 2
848## perl-continued-brace-offset: 0
849## perl-brace-offset: 0
850## perl-brace-imaginary-offset: 0
851## perl-label-offset: -2
852## cperl-indent-level: 2
853## cperl-brace-offset: 0
854## cperl-continued-brace-offset: 0
855## cperl-label-offset: -2
856## cperl-extra-newline-before-brace: t
857## cperl-merge-trailing-else: nil
858## cperl-continued-statement-offset: 2
859## End:
bison