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Fix user actions without a trailing semicolon.
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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
3a2803df 26 ./bench.pl [OPTIONS]... BENCHES
15129f25 27
3a2803df 28=head1 BENCHES
a6df593d
AD		 29
30Specify the set of benches to run. I<bench-name> should be one of:
31
32=over 4
33
34=item I<fusion>
35
36Test F<lalr1.cc> with three stacks against F<lalr1-fusion.cc> which
37uses a single one.
38
39=item I<push>
40
41Test the push parser vs. the pull interface. Use the C parser.
42
43=item I<variant>
44
45Test the use of variants instead of union in the C++ parser.
46
47=back
48
3a2803df
AD		 49=head1 OPTIONS
50
7e5f9c54
AD		 51=item B<-c>, B<--cflags>=I<flags>
52
ef05c4d6
AD		 53Flags to pass to the C or C++ compiler. Defaults to -O2.
54
55=item B<-h>, B<--help>
56
57Display this message and exit succesfully. The more verbose, the more
58details.
7e5f9c54
AD		 59
60=item B<-i>, B<--iterations>=I<integer>
61
d11ee647
AD		 62Say how many times a single test of the bench must be run. If
63negative, specify the minimum number of CPU seconds to run. Defaults
ef05c4d6
AD		 64to -1.
65
66=item B<-q>, B<--quiet>
67
68Decrease the verbosity level (defaults to 1).
7e5f9c54
AD		 69
70=item B<-v>, B<--verbose>
71
ef05c4d6 72Raise the verbosity level (defaults to 1).
7e5f9c54 73
e1b74b92
AD		 74=back
75
15129f25
AD		 76=cut
77
3a2803df 78use strict;
3cedc2dc 79use IO::File;
3cedc2dc 80
e1b74b92
AD		 81##################################################################
82
83=head1 VARIABLES
84
85=over 4
86
3a2803df
AD		 87=item C<@bench>
88
89The list of benches to run.
90
e1b74b92
AD		 91=item C<$bison>
92
93The Bison program to use to compile the grammar.
94
95=item C<$cc>
96
97The C compiler.
98
99=item C<$cxx>
100
101The C++ compiler.
102
103=item C<$cflags>
104
105Compiler flags (C or C++).
106
107=item C<$iterations>
108
109The number of times the parser is run for a bench.
110
111=item C<$verbose>
112
113Verbosity level.
114
115=back
116
117=cut
118
2e7944cb 119my $bison = $ENV{'BISON'} || '@abs_top_builddir@/tests/bison';
3cedc2dc 120my $cc = $ENV{'CC'} || 'gcc';
7109a18d 121my $cxx = $ENV{'CXX'} || 'g++';
ef05c4d6
AD		 122my $cflags = '-O2';
123my $iterations = -1;
124my $verbose = 1;
3cedc2dc 125
e1b74b92 126=head1 FUNCTIONS
3cedc2dc 127
e1b74b92 128=over 4
7e5f9c54 129
e1b74b92 130=item C<verbose($level, $message)>
15129f25 131
e1b74b92
AD		 132Report the C<$message> is C<$level> E<lt>= C<$verbose>.
133
134=cut
135
136sub verbose($$)
137{
138 my ($level, $message) = @_;
139 print STDERR $message
140 if $level <= $verbose;
141}
15129f25 142
3a2803df
AD		 143
144######################################################################
145
922730fe
AD		 146=item C<directives($bench, @directive)>
147
148Format the list of directives for Bison for bench named C<$bench>.
149
7109a18d
AD		 150The special fake C<%variant> directive requests the use of
151Boost.Variants instead of a regular union. So don't pass it, it is
152not a valid directive.
153
922730fe
AD		 154=cut
155
156sub directives($@)
157{
5b421a4e 158 my ($bench, @directive) = @_;
922730fe 159 my $res = "/* Directives for bench `$bench'. */\n";
5b421a4e 160 for my $d (@directive)
7109a18d
AD		 161 {
162 $res .= $d . "\n"
163 unless $d eq '%variant';
164 }
922730fe
AD		 165 $res .= "/* End of directives for bench `$bench'. */\n";
166 return $res;
167}
168
3a2803df
AD		 169######################################################################
170
171=item C<generate_grammar_triangular ($base, $max, @directive)>
15129f25
AD		 172
173Create a large triangular grammar which looks like :
174
175 input:
176 exp { if ($1 != 0) abort (); $$ = $1; }
177 | input exp { if ($2 != $1 + 1) abort (); $$ = $2; }
178 ;
179
180 exp:
181 END { $$ = 0; }
182 | "1" END { $$ = 1; }
183 | "1" "2" END { $$ = 2; }
184 | "1" "2" "3" END { $$ = 3; }
185 | "1" "2" "3" "4" END { $$ = 4; }
186 | "1" "2" "3" "4" "5" END { $$ = 5; }
187 ;
188
7e5f9c54 189C<$base> is the base name for the file to create (F<$base.y>).
15129f25 190C<$max> is the number of such rules (here, 5). You may pass
5b421a4e 191additional Bison C<@directive>.
15129f25
AD		 192
193The created parser is self contained: it includes its scanner, and
194source of input.
195=cut
196
3a2803df 197sub generate_grammar_triangular ($$@)
3cedc2dc 198{
5b421a4e
AD		 199 my ($base, $max, @directive) = @_;
200 my $directives = directives ($base, @directive);
3cedc2dc
AD		 201
202 my $out = new IO::File ">$base.y"
203 or die;
204 print $out <<EOF;
205%error-verbose
206%debug
207%{
208#include <stdio.h>
209#include <stdlib.h>
210
211static int yylex (void);
212static void yyerror (const char *msg);
213%}
922730fe 214$directives
3cedc2dc
AD		 215%union
216{
217 int val;
218};
219
220%token END "end"
221%type <val> exp input
222EOF
223
224 for my $size (1 .. $max)
225 {
226 print $out "%token t$size $size \"$size\"\n";
227 };
228
229print $out <<EOF;
230%%
231input:
232 exp { if (\$1 != 0) abort (); \$\$ = \$1; }
233| input exp { if (\$2 != \$1 + 1) abort (); \$\$ = \$2; }
234;
235
236exp:
237 END
238 { \$\$ = 0; }
239EOF
240
241for my $size (1 .. $max)
242 {
243 use Text::Wrap;
244 print $out wrap ("| ", " ",
245 (map { "\"$_\"" } (1 .. $size)),
246 " END \n"),
247 " { \$\$ = $size; }\n";
248 };
249print $out ";\n";
250
251print $out <<EOF;
252%%
253static int
254yylex (void)
255{
256 static int inner = 1;
257 static int outer = 0;
258 if (outer > $max)
259 return 0;
260 else if (inner > outer)
261 {
262 inner = 1;
263 ++outer;
264 return END;
265 }
266 return inner++;
267}
268
269static void
270yyerror (const char *msg)
271{
272 fprintf (stderr, "%s\\n", msg);
273}
274
275int
276main (void)
277{
278 yydebug = !!getenv ("YYDEBUG");
279 return yyparse ();
280}
281EOF
282}
283
284##################################################################
285
15129f25
AD		 286=item C<calc_input ($base, $max)>
287
7e5f9c54 288Generate the input file F<$base.input> for the calc parser. The input
15129f25
AD		 289is composed of two expressions. The first one is using left recursion
290only and consumes no stack. The second one requires a deep stack.
291These two expressions are repeated C<$max> times in the output file.
292
293=cut
294
3cedc2dc
AD		 295sub calc_input ($$)
296{
297 my ($base, $max) = @_;
298 my $out = new IO::File ">$base.input"
299 or die;
300 foreach (1 .. $max)
301 {
302 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";
303 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";
304 }
305}
306
307##################################################################
3a2803df
AD		 308
309=item C<generate_grammar_calc ($base, $max, @directive)>
15129f25 310
7e5f9c54 311Generate a Bison file F<$base.y> for a calculator parser in C. Pass
5b421a4e 312the additional Bison C<@directive>. C<$max> is ignored, but left to
7109a18d 313have the same interface as C<triangular_grammar>.
15129f25
AD		 314
315=cut
3cedc2dc 316
3a2803df 317sub generate_grammar_calc ($$@)
3cedc2dc 318{
5b421a4e
AD		 319 my ($base, $max, @directive) = @_;
320 my $directives = directives ($base, @directive);
3cedc2dc
AD		 321
322 my $out = new IO::File ">$base.y"
323 or die;
324 print $out <<EOF;
325%{
326#include <stdio.h>
327
328#include <stdlib.h>
329#include <string.h>
330#include <ctype.h>
331#define USE(Var)
332
333/* Exercise pre-prologue dependency to %union. */
334typedef int semantic_value;
335
336static semantic_value global_result = 0;
337static int global_count = 0;
338%}
339
3cedc2dc
AD		 340$directives
341%error-verbose
922730fe 342/* Exercise %union. */
3cedc2dc
AD		 343%union
344{
345 semantic_value ival;
346};
347
348%{
349static int power (int base, int exponent);
350/* yyerror receives the location if:
351 - %location & %pure & %glr
352 - %location & %pure & %yacc & %parse-param. */
353static void yyerror (const char *s);
354#if YYPURE
355static int yylex (YYSTYPE* yylvalp);
356#else
357static int yylex (void);
358#endif
359%}
360
361/* Bison Declarations */
362%token CALC_EOF 0 "end of input"
363%token <ival> NUM "number"
364%type <ival> exp
365
366%nonassoc '=' /* comparison */
367%left '-' '+'
368%left '*' '/'
369%left NEG /* negation--unary minus */
370%right '^' /* exponentiation */
371
372/* Grammar follows */
373%%
374input:
375 line
376| input line
377;
378
379line:
380 '\\n'
381| exp '\\n' { USE (\$1); }
382;
383
384exp:
385 NUM { \$\$ = \$1; }
386| exp '=' exp
387 {
388 if (\$1 != \$3)
389 fprintf (stderr, "calc: error: %d != %d\\n", \$1, \$3);
390 \$\$ = \$1;
391 }
392| exp '+' exp { \$\$ = \$1 + \$3; }
393| exp '-' exp { \$\$ = \$1 - \$3; }
394| exp '*' exp { \$\$ = \$1 * \$3; }
395| exp '/' exp { \$\$ = \$1 / \$3; }
396| '-' exp %prec NEG { \$\$ = -\$2; }
397| exp '^' exp { \$\$ = power (\$1, \$3); }
398| '(' exp ')' { \$\$ = \$2; }
399| '(' error ')' { \$\$ = 1111; }
400| '!' { \$\$ = 0; YYERROR; }
401| '-' error { \$\$ = 0; YYERROR; }
402;
403%%
404/* The input. */
405static FILE *input;
406
407static void
408yyerror (const char *s)
409{
410 fprintf (stderr, "%s\\n", s);
411}
412
413static int
414get_char (void)
415{
416 return getc (input);
417}
418
419
420static void
421unget_char ( int c)
422{
423 ungetc (c, input);
424}
425
426static int
427read_signed_integer (void)
428{
429 int c = get_char ();
430 int sign = 1;
431 int n = 0;
432
433 if (c == '-')
434 {
435 c = get_char ();
436 sign = -1;
437 }
438
439 while (isdigit (c))
440 {
441 n = 10 * n + (c - '0');
442 c = get_char ();
443 }
444
445 unget_char (c);
446
447 return sign * n;
448}
449
3cedc2dc
AD		 450static int
451#if YYPURE
452# define yylval (*yylvalp)
453yylex (YYSTYPE* yylvalp)
454#else
455yylex (void)
456#endif
457{
458 int c;
459
460 /* Skip white space. */
461 while ((c = get_char ()) == ' ' || c == '\t')
0925d5bf 462 continue;
3cedc2dc
AD		 463
464 /* process numbers */
465 if (c == '.' || isdigit (c))
466 {
467 unget_char ( c);
468 yylval.ival = read_signed_integer ();
469 return NUM;
470 }
471
472 /* Return end-of-file. */
473 if (c == EOF)
474 return CALC_EOF;
475
476 /* Return single chars. */
477 return c;
478}
479
480static int
481power (int base, int exponent)
482{
483 int res = 1;
484 if (exponent < 0)
485 exit (3);
486 for (/* Niente */; exponent; --exponent)
487 res *= base;
488 return res;
489}
490
491
3cedc2dc
AD		 492int
493main (int argc, const char **argv)
494{
495 semantic_value result = 0;
496 int count = 0;
497 int status;
498
499 input = fopen ("calc.input", "r");
500 if (!input)
501 {
502 perror ("calc.input");
503 return 3;
504 }
505
506 status = yyparse ();
507 if (global_result != result)
508 abort ();
509 if (global_count != count)
510 abort ();
511
512 return status;
513}
514EOF
515}
516
517##################################################################
518
3a2803df 519=item C<generate_grammar_variant ($base, $max, @directive)>
7109a18d 520
7e5f9c54 521Generate a Bison file F<$base.y> that uses, or not, the Boost.Variants
5b421a4e 522depending on the C<@directive>.
7109a18d
AD		 523
524=cut
525
3a2803df 526sub generate_grammar_variant ($$@)
7109a18d 527{
5b421a4e
AD		 528 my ($base, $max, @directive) = @_;
529 my $directives = directives ($base, @directive);
530 my $variant = grep { $_ eq '%variant' } @directive;
7109a18d
AD		 531
532 my $out = new IO::File ">$base.y"
533 or die;
534 print $out <<EOF;
7109a18d
AD		 535%language "C++"
536%defines
5b421a4e 537$directives
7109a18d 538
5b421a4e 539%code requires // variant.h
7109a18d
AD		 540{
541#include <string>
542}
543
5b421a4e 544%code // variant.c
7109a18d
AD		 545{
546#include <algorithm>
547#include <iostream>
548#include <sstream>
549
550// Prototype of the yylex function providing subsequent tokens.
551static yy::parser::token_type yylex(yy::parser::semantic_type* yylval);
552
3a2803df 553#define STAGE_MAX ($max * 10) // max = $max
7109a18d
AD		 554#define USE_VARIANTS $variant
555#if USE_VARIANTS
556# define IF_VARIANTS(True, False) True
557#else
558# define IF_VARIANTS(True, False) False
559#endif
560}
561EOF
562
563 if ($variant)
564 {
565 print $out <<'EOF';
566%code variant {int,std::string}
567%token <std::string> TEXT
568%token <int> NUMBER
569%printer { std::cerr << "Number: " << $$; } <int>
570%printer { std::cerr << "Text: " << $$; } <std::string>
571%token END_OF_FILE 0
572%type <std::string> text result
573
574%%
575result:
576 text { /* Throw away the result. */ }
577;
578
579text:
580 /* nothing */ { /* This will generate an empty string */ }
581| text TEXT { std::swap($$,$1); $$.append($2); }
582| text NUMBER {
583 std::swap($$,$1);
584 std::ostringstream ss;
585 ss << ' ' << $2;
586 $$.append(ss.str());
587 }
588;
589EOF
590 }
591 else
592 {
593 # Not using Boost variants.
594 print $out <<'EOF';
595%union {int ival; std::string* sval;}
596%token <sval> TEXT
597%token <ival> NUMBER
598%printer { std::cerr << "Number: " << $$; } <ival>
599%printer { std::cerr << "Text: " << *$$; } <sval>
600%token END_OF_FILE 0
601%type <sval> text result
602
603%%
604result:
605 text { delete $1; }
606;
607
608text:
609 /* nothing */ { $$ = new std::string; }
610| text TEXT { $$->append(*$2); delete $2; }
611| text NUMBER {
612 std::ostringstream ss;
613 ss << ' ' << $2;
614 $$->append(ss.str());
615 }
616;
617EOF
618 }
619
620 print $out <<'EOF';
621%%
622static
623yy::parser::token_type
624yylex(yy::parser::semantic_type* yylval)
625{
626 static int stage = -1;
627 ++stage;
628 if (stage == STAGE_MAX)
629 return yy::parser::token::END_OF_FILE;
630 else if (stage % 2)
631 {
a6df593d 632 IF_VARIANTS(yylval->build<int>(), yylval->ival) = stage;
7109a18d
AD		 633 return yy::parser::token::NUMBER;
634 }
635 else
636 {
a6df593d 637 IF_VARIANTS(yylval->build<std::string>() =, yylval->sval = new) std::string("A string.");
7109a18d
AD		 638 return yy::parser::token::TEXT;
639 }
640 abort();
641}
642
643// Mandatory error function
644void
645yy::parser::error(const yy::parser::location_type& yylloc,
646 const std::string& message)
647{
648 std::cerr << yylloc << ": " << message << std::endl;
649}
650
651int main(int argc, char *argv[])
652{
653 yy::parser p;
5b421a4e 654#if YYDEBUG
7109a18d 655 p.set_debug_level(!!getenv("YYDEBUG"));
5b421a4e 656#endif
7109a18d
AD		 657 p.parse();
658 return 0;
659}
660EOF
661}
662
663##################################################################
664
3a2803df
AD		 665=item C<generate_grammar ($name, $base, @directive)>
666
667Generate F<$base.y> by calling C<&generate_grammar_$name>.
668
669=cut
670
671sub generate_grammar ($$@)
672{
673 my ($name, $base, @directive) = @_;
674 verbose 2, "Generating $base.y\n";
675 my %generator =
676 (
677 "calc" => \&generate_grammar_calc,
678 "triangular" => \&generate_grammar_triangular,
679 "variant" => \&generate_grammar_variant,
680 );
681 &{$generator{$name}}($base, 200, @directive);
682}
683
684##################################################################
685
686=item C<run ($command)>
687
688Run, possibly verbosely, the shell C<$command>.
689
690=cut
691
692sub run ($)
693{
694 my ($command) = @_;
695 verbose 2, "$command\n";
696 system ("$command") == 0
697 or die "$command failed";
698}
699
700##################################################################
701
15129f25
AD		 702=item C<compile ($base)>
703
7109a18d
AD		 704Compile C<$base.y> to an executable C, Using the C or C++ compiler
705depending on the %language specification in C<$base.y>.
15129f25
AD		 706
707=cut
708
3cedc2dc
AD		 709sub compile ($)
710{
711 my ($base) = @_;
7109a18d
AD		 712 my $language = `sed -ne '/%language "\\(.*\\)"/{s//\\1/;p;q;}' $base.y`;
713 chomp $language;
714
715 my $compiler = $language eq 'C++' ? $cxx : $cc;
716
3a2803df
AD		 717 run "$bison $base.y -o $base.c";
718 run "$compiler -o $base $cflags $base.c";
3cedc2dc
AD		 719}
720
3a2803df
AD		 721######################################################################
722
7484f1d4 723=item C<bench_grammar ($gram, %bench)>
15129f25
AD		 724
725Generate benches for C<$gram>. C<$gram> should be C<calc> or
7484f1d4
AD		 726C<triangle>. C<%bench> is a hash of the form:
727
5b421a4e 728 $name => @directive
7484f1d4 729
5b421a4e 730where C<$name> is the name of the bench, and C<@directive> are the
7484f1d4
AD		 731Bison directive to use for this bench. All the benches are compared
732against each other, repeated 50 times.
15129f25
AD		 733
734=cut
735
7484f1d4 736sub bench_grammar ($%)
3cedc2dc 737{
7484f1d4 738 my ($gram, %test) = @_;
f16b0819 739
d11ee647
AD		 740 use Benchmark qw (:all :hireswallclock);
741
7484f1d4 742 # Set up the benches as expected by timethese.
3cedc2dc 743 my %bench;
d11ee647
AD		 744 # For each bench, capture the size.
745 my %size;
3cedc2dc
AD		 746 while (my ($name, $directives) = each %test)
747 {
3a2803df 748 generate_grammar ($gram, $name, @$directives);
5b421a4e 749 # Compile the executable.
3cedc2dc
AD		 750 compile ($name);
751 $bench{$name} = "system ('./$name');";
d11ee647 752 chop($size{$name} = `wc -c <$name`);
3cedc2dc
AD		 753 }
754
7484f1d4 755 # Run the benches.
d11ee647
AD		 756 #
757 # STYLE can be any of 'all', 'none', 'noc', 'nop' or 'auto'. 'all'
758 # shows each of the 5 times available ('wallclock' time, user time,
759 # system time, user time of children, and system time of
760 # children). 'noc' shows all except the two children times. 'nop'
761 # shows only wallclock and the two children times. 'auto' (the
762 # default) will act as 'all' unless the children times are both
763 # zero, in which case it acts as 'noc'. 'none' prevents output.
ef05c4d6 764 verbose 2, "Running the benches for $gram\n";
7e5f9c54 765 my $res = timethese ($iterations, \%bench, 'nop');
d11ee647
AD		 766
767 # Output the speed result.
3cedc2dc 768 cmpthese ($res, 'nop');
d11ee647
AD		 769
770 # Display the sizes.
cac9e09b 771 print "Sizes (decreasing):\n";
0cc5bead 772 my $width = 10;
d11ee647
AD		 773 for my $bench (keys %size)
774 {
0cc5bead
AD		 775 $width = length $bench
776 if $width < length $bench;
777 }
cac9e09b
AD		 778 # Benches sorted by decreasing size.
779 my @benches_per_size = sort {$size{$b} <=> $size{$a}} keys %size;
780 for my $bench (@benches_per_size)
0cc5bead 781 {
cac9e09b 782 printf "%${width}s: %5.2fkB\n", $bench, $size{$bench} / 1024;
d11ee647 783 }
3cedc2dc
AD		 784}
785
3a2803df 786######################################################################
7484f1d4
AD		 787
788=item C<bench_push_parser ()>
789
790Bench the C push parser against the pull parser, pure and impure
791interfaces.
792
793=cut
794
795sub bench_push_parser ()
796{
7484f1d4
AD		 797 calc_input ('calc', 200);
798 bench_grammar
799 ('calc',
800 (
922730fe
AD		 801 "pull-impure" => [],
802 "pull-pure" => ['%define api.pure'],
803 "push-impure" => ['%define api.push_pull "both"'],
804 "push-pure" => ['%define api.push_pull "both"', '%define api.pure'],
7484f1d4
AD		 805 )
806 );
807}
808
3a2803df
AD		 809######################################################################
810
7109a18d
AD		 811=item C<bench_variant_parser ()>
812
813Bench the C++ lalr1.cc parser using Boost.Variants or %union.
814
815=cut
816
817sub bench_variant_parser ()
818{
819 bench_grammar
820 ('variant',
821 (
a6df593d
AD		 822 "f-union" => ['%skeleton "lalr1-fusion.cc"'],
823 "f-uni-deb" => ['%skeleton "lalr1-fusion.cc"', '%debug'],
824 "f-var" => ['%skeleton "lalr1-fusion.cc"', '%variant'],
825 "f-var-deb" => ['%skeleton "lalr1-fusion.cc"', '%debug', '%variant'],
826 "f-var-dtr" => ['%skeleton "lalr1-fusion.cc"', '%variant', "%code {\n#define VARIANT_DESTROY\n}"],
827 "f-var-deb-dtr" => ['%skeleton "lalr1-fusion.cc"', '%debug', '%variant', "%code {\n#define VARIANT_DESTROY\n}"],
7109a18d
AD		 828 )
829 );
830}
831
3a2803df
AD		 832######################################################################
833
429b4848
AD		 834=item C<bench_fusion_parser ()>
835
836Bench the C++ lalr1.cc parser using Boost.Variants or %union.
837
838=cut
839
840sub bench_fusion_parser ()
841{
842 bench_grammar
843 ('variant',
844 (
845 "split" => [],
846 "fused" => ['%skeleton "lalr1-fusion.cc"'],
847 )
848 );
849}
850
7109a18d
AD		 851############################################################################
852
7e5f9c54
AD		 853sub help ($)
854{
855 my ($verbose) = @_;
856 use Pod::Usage;
857 # See <URL:http://perldoc.perl.org/pod2man.html#NOTES>.
858 pod2usage( { -message => "Bench Bison parsers",
859 -exitval => 0,
860 -verbose => $verbose,
861 -output => \*STDOUT });
862}
863
3a2803df
AD		 864######################################################################
865
7e5f9c54
AD		 866sub getopt ()
867{
868 use Getopt::Long;
3a2803df 869 my %option = (
a6df593d
AD		 870 "c|cflags=s" => \$cflags,
871 "h|help" => sub { help ($verbose) },
872 "i|iterations=i" => \$iterations,
ef05c4d6 873 "q|quiet" => sub { --$verbose },
a6df593d
AD		 874 "v|verbose" => sub { ++$verbose },
875 );
7e5f9c54
AD		 876 Getopt::Long::Configure ("bundling", "pass_through");
877 GetOptions (%option)
878 or exit 1;
879}
880
881######################################################################
882
883getopt;
e1b74b92
AD		 884verbose 1, "Using bison=$bison.\n";
885verbose 1, "Using cc=$cc.\n";
886verbose 1, "Using cxx=$cxx.\n";
887verbose 1, "Using cflags=$cflags.\n";
a6df593d 888
3a2803df
AD		 889for my $b (@ARGV)
890{
891 verbose 1, "Running benchmark $b.\n";
892 bench_fusion_parser() if $b eq "fusion";
893 bench_push_parser() if $b eq "push";
894 bench_variant_parser() if $b eq "variant";
895}
3cedc2dc
AD		 896
897### Setup "GNU" style for perl-mode and cperl-mode.
898## Local Variables:
899## perl-indent-level: 2
900## perl-continued-statement-offset: 2
901## perl-continued-brace-offset: 0
902## perl-brace-offset: 0
903## perl-brace-imaginary-offset: 0
904## perl-label-offset: -2
905## cperl-indent-level: 2
906## cperl-brace-offset: 0
907## cperl-continued-brace-offset: 0
908## cperl-label-offset: -2
909## cperl-extra-newline-before-brace: t
910## cperl-merge-trailing-else: nil
911## cperl-continued-statement-offset: 2
912## End:
bison