X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/a5eb1ed262e86657c5af95e4a8eae258a2e49e4b..798096e1deaeb13a06e62de5c73487537e220e3c:/tests/actions.at?ds=inline diff --git a/tests/actions.at b/tests/actions.at index e8124e9e..602eac8c 100644 --- a/tests/actions.at +++ b/tests/actions.at @@ -1,20 +1,19 @@ # Executing Actions. -*- Autotest -*- -# Copyright (C) 2001, 2002, 2003, 2004 Free Software Foundation, Inc. +# Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007 Free Software +# Foundation, Inc. -# This program is free software; you can redistribute it and/or modify +# This program is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by -# the Free Software Foundation; either version 2, or (at your option) -# any later version. - +# the Free Software Foundation, either version 3 of the License, or +# (at your option) any later version. +# # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. - +# # You should have received a copy of the GNU General Public License -# along with this program; if not, write to the Free Software -# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA -# 02111-1307, USA. +# along with this program. If not, see . AT_BANNER([[User Actions.]]) @@ -30,13 +29,13 @@ AT_SETUP([Mid-rule actions]) # action. AT_DATA_GRAMMAR([[input.y]], -[[%{ +[[%error-verbose +%debug +%{ # include # include static void yyerror (const char *msg); static int yylex (void); -# define YYDEBUG 1 -# define YYERROR_VERBOSE 1 %} %% exp: { putchar ('0'); } @@ -55,8 +54,11 @@ exp: { putchar ('0'); } static int yylex (void) { - static const char *input = "123456789"; - return *input++; + static char const input[] = "123456789"; + static size_t toknum; + if (! (toknum < sizeof input)) + abort (); + return input[toknum++]; } static void @@ -72,7 +74,7 @@ main (void) } ]]) -AT_CHECK([bison -d -v -o input.c input.y]) +AT_BISON_CHECK([-d -v -o input.c input.y]) AT_COMPILE([input]) AT_PARSER_CHECK([./input], 0, [[0123456789 @@ -82,151 +84,6 @@ AT_CLEANUP -## ---------------------- ## -## Actions after errors. ## -## ---------------------- ## - -AT_SETUP([Actions after errors]) - - - -AT_DATA_GRAMMAR([[input.y]], -[[%{ -#include -#include - -static int yylex (void); -static void yyerror (char const *); - -#define YYDEBUG 1 -%} -%union { int ival; } -%type 'x' ';' thing line input - -%% -input: - /* Nothing. */ - { - $$ = 0; - printf ("input (%d): /* Nothing */\n", $$); - } -| line input /* Right recursive to load the stack so that popping at - EOF can be exercised. */ - { - $$ = 2; - printf ("input (%d): line (%d) input (%d)\n", $$, $1, $2); - } -; - -line: - thing thing thing ';' - { - $$ = $1; - printf ("line (%d): thing (%d) thing (%d) thing (%d) ';' (%d)\n", - $$, $1, $2, $3, $4); - } -| thing thing ';' - { - $$ = $1; - printf ("line (%d): thing (%d) thing (%d) ';' (%d)\n", $$, $1, $2, $3); - } -| thing ';' - { - $$ = $1; - printf ("line (%d): thing (%d) ';' (%d)\n", $$, $1, $2); - } -| error ';' - { - $$ = -1; - printf ("line (%d): error ';' (%d)\n", $$, $2); - } -; - -thing: - 'x' - { - $$ = $1; - printf ("thing (%d): 'x' (%d)\n", $$, $1); - } -; -%% -static size_t counter; - -static int -yylex (void) -{ - static char const input[] = - { - /* Exercise the discarding of stack top and input until `error' - can be reduced. */ - 'x', 'x', 'x', 'x', 'x', 'x', ';', - - /* Load the stack and provoke an error that cannot be caught by - the grammar, to check that the stack is cleared. */ - 'x', 'x', ';', - 'x', ';', - 'y' - }; - - if (counter < sizeof input) - { - yylval.ival = counter; - printf ("sending: '%c' (%d)\n", input[counter], yylval.ival); - return input[counter++]; - } - else - { - printf ("sending: EOF\n"); - return EOF; - } -} - -static void -yyerror (char const *msg) -{ - printf ("%lu: %s\n", (unsigned long int) counter, msg); -} - -int -main (void) -{ - yydebug = !!getenv ("YYDEBUG"); - return yyparse (); -} -]]) - -AT_CHECK([bison -o input.c input.y]) -AT_COMPILE([input]) -AT_PARSER_CHECK([./input], 1, -[[sending: 'x' (0) -thing (0): 'x' (0) -sending: 'x' (1) -thing (1): 'x' (1) -sending: 'x' (2) -thing (2): 'x' (2) -sending: 'x' (3) -4: syntax error -sending: 'x' (4) -sending: 'x' (5) -sending: ';' (6) -line (-1): error ';' (6) -sending: 'x' (7) -thing (7): 'x' (7) -sending: 'x' (8) -thing (8): 'x' (8) -sending: ';' (9) -line (7): thing (7) thing (8) ';' (9) -sending: 'x' (10) -thing (10): 'x' (10) -sending: ';' (11) -line (10): thing (10) ';' (11) -sending: 'y' (12) -13: syntax error -sending: EOF -]]) - -AT_CLEANUP - ## ---------------- ## @@ -236,13 +93,14 @@ AT_CLEANUP AT_SETUP([Exotic Dollars]) AT_DATA_GRAMMAR([[input.y]], -[[%{ +[[%error-verbose +%debug +%{ # include # include static void yyerror (const char *msg); static int yylex (void); -# define YYDEBUG 1 -# define YYERROR_VERBOSE 1 +# define USE(Var) %} %union @@ -257,6 +115,7 @@ AT_DATA_GRAMMAR([[input.y]], exp: a_1 a_2 { $$ = 3; } { $$ = $3 + 1; } a_5 sum_of_the_five_previous_values { + USE (($1, $2, $3, $4, $5)); printf ("%d\n", $6); } ; @@ -274,6 +133,9 @@ sum_of_the_five_previous_values: static int yylex (void) { + static int called; + if (called++) + abort (); return EOF; } @@ -290,7 +152,7 @@ main (void) } ]]) -AT_CHECK([bison -d -v -o input.c input.y]) +AT_BISON_CHECK([-d -v -o input.c input.y], 0) AT_COMPILE([input]) AT_PARSER_CHECK([./input], 0, [[15 @@ -307,47 +169,48 @@ AT_CLEANUP # _AT_CHECK_PRINTER_AND_DESTRUCTOR($1, $2, $3, $4, BISON-DIRECTIVE, UNION-FLAG) # ----------------------------------------------------------------------------- m4_define([_AT_CHECK_PRINTER_AND_DESTRUCTOR], -[m4_if([$1$2$3], $[1]$[2]$[3], [], +[# Make sure complex $n work. +m4_if([$1$2$3], $[1]$[2]$[3], [], [m4_fatal([$0: Invalid arguments: $@])])dnl -AT_SETUP([Printers and Destructors $6: $5]) - -# Make sure complex $n work. - +# Be sure to pass all the %directives to this macro to have correct +# helping macros. So don't put any directly in the Bison file. AT_BISON_OPTION_PUSHDEFS([$5]) AT_DATA_GRAMMAR([[input.y]], -[[$5 -%{ +[[%code requires { #include #include +#include +#include + +#define YYINITDEPTH 10 +#define YYMAXDEPTH 10 ]AT_LALR1_CC_IF( [#define RANGE(Location) (Location).begin.line, (Location).end.line], [#define RANGE(Location) (Location).first_line, (Location).last_line]) -[%} -%error-verbose -%debug -%verbose -%locations -]m4_ifval([$6], [%union +[} + +$5] +m4_ifval([$6], [%union { int ival; }]) -[ -%{ -]AT_LALR1_CC_IF([typedef yy::Location YYLTYPE; -m4_ifval([$6], , [#define YYSTYPE int])]) +AT_LALR1_CC_IF([%define global_tokens_and_yystype]) +m4_ifval([$6], [[%code provides {]], [[%code {]]) +AT_LALR1_CC_IF([typedef yy::location YYLTYPE;]) [static int yylex (]AT_LEX_FORMALS[); ]AT_LALR1_CC_IF([], [static void yyerror (const char *msg);]) -[%} +[} -]m4_ifval([$6], [%type 'x' ';' thing line input])[ +]m4_ifval([$6], [%type '(' 'x' 'y' ')' ';' thing line input END])[ +/* FIXME: This %printer isn't actually tested. */ %printer { - ]AT_LALR1_CC_IF([cdebug_ << @$ << ": " << $$;], - [fprintf (yyoutput, "%d@%d-%d", $$, RANGE (@$))])[; + ]AT_LALR1_CC_IF([debug_stream () << $$;], + [fprintf (yyoutput, "%d", $$)])[; } - input line thing 'x' + input line thing 'x' 'y' %destructor { printf ("Freeing nterm input (%d@%d-%d)\n", $$, RANGE (@$)); } @@ -365,7 +228,23 @@ m4_ifval([$6], , [#define YYSTYPE int])]) { printf ("Freeing token 'x' (%d@%d-%d)\n", $$, RANGE (@$)); } 'x' +%destructor + { printf ("Freeing token 'y' (%d@%d-%d)\n", $$, RANGE (@$)); } + 'y' + +%token END 0 +%destructor + { printf ("Freeing token END (%d@%d-%d)\n", $$, RANGE (@$)); } + END + %% +/* + This grammar is made to exercise error recovery. + "Lines" starting with `(' support error recovery, with + ')' as synchronizing token. Lines starting with 'x' can never + be recovered from if in error. +*/ + input: /* Nothing. */ { @@ -373,7 +252,7 @@ input: printf ("input (%d@%d-%d): /* Nothing */\n", $$, RANGE (@$)); } | line input /* Right recursive to load the stack so that popping at - EOF can be exercised. */ + END can be exercised. */ { $$ = 2; printf ("input (%d@%d-%d): line (%d@%d-%d) input (%d@%d-%d)\n", @@ -389,23 +268,24 @@ line: $$, RANGE (@$), $1, RANGE (@1), $2, RANGE (@2), $3, RANGE (@3), $4, RANGE (@4)); } -| thing thing ';' +| '(' thing thing ')' { $$ = $1; - printf ("line (%d@%d-%d): thing (%d@%d-%d) thing (%d@%d-%d) ';' (%d@%d-%d)\n", - $$, RANGE (@$), $1, RANGE (@1), $2, RANGE (@2), $3, RANGE (@3)); + printf ("line (%d@%d-%d): '(' (%d@%d-%d) thing (%d@%d-%d) thing (%d@%d-%d) ')' (%d@%d-%d)\n", + $$, RANGE (@$), $1, RANGE (@1), $2, RANGE (@2), + $3, RANGE (@3), $4, RANGE (@4)); } -| thing ';' +| '(' thing ')' { $$ = $1; - printf ("line (%d@%d-%d): thing (%d@%d-%d) ';' (%d@%d-%d)\n", - $$, RANGE (@$), $1, RANGE (@1), $2, RANGE (@2)); + printf ("line (%d@%d-%d): '(' (%d@%d-%d) thing (%d@%d-%d) ')' (%d@%d-%d)\n", + $$, RANGE (@$), $1, RANGE (@1), $2, RANGE (@2), $3, RANGE (@3)); } -| error ';' +| '(' error ')' { $$ = -1; - printf ("line (%d@%d-%d): error (@%d-%d) ';' (%d@%d-%d)\n", - $$, RANGE (@$), RANGE (@1), $2, RANGE (@2)); + printf ("line (%d@%d-%d): '(' (%d@%d-%d) error (@%d-%d) ')' (%d@%d-%d)\n", + $$, RANGE (@$), $1, RANGE (@1), RANGE (@2), $3, RANGE (@3)); } ; @@ -418,70 +298,48 @@ thing: } ; %% +/* Alias to ARGV[1]. */ +const char *source = 0; + static int yylex (]AT_LEX_FORMALS[) { - static const char input[] = - { - /* Exercise the discarding of stack top and input until `error' - can be reduced. */ - 'x', 'x', 'x', 'x', 'x', 'x', ';', - - /* Load the stack and provoke an error that cannot be caught by - the grammar, to check that the stack is cleared. */ - 'x', 'x', ';', - 'x', ';', - 'y' - }; static unsigned int counter = 0; - if (counter < (sizeof(input) / sizeof (input[0]))) - { + int c = ]AT_VAL[]m4_ifval([$6], [.ival])[ = counter++; + /* As in BASIC, line numbers go from 10 to 10. */ ]AT_LALR1_CC_IF( -[ int c = m4_ifval([$6], [yylval->ival], [*yylval]) = counter++; - /* As in BASIC, line numbers go from 10 to 10. */ - yylloc->begin.line = yylloc->begin.column = 10 * c; - yylloc->end.line = yylloc->end.column = yylloc->begin.line + 9; - printf ("sending: '%c' (%d@%d-%d)\n", - input[[c]], c, RANGE (*yylloc)); - return input[[c]]; +[ AT_LOC.begin.line = AT_LOC.begin.column = 10 * c; + AT_LOC.end.line = AT_LOC.end.column = AT_LOC.begin.line + 9; ], -[ int c = m4_ifval([$6], [yylval.ival], [yylval]) = counter++; - /* As in BASIC, line numbers go from 10 to 10. */ - yylloc.first_line = yylloc.first_column = 10 * c; - yylloc.last_line = yylloc.last_column = yylloc.first_line + 9; - printf ("sending: '%c' (%d@%d-%d)\n", - input[[c]], c, RANGE (yylloc)); - return input[[c]]; +[ AT_LOC.first_line = AT_LOC.first_column = 10 * c; + AT_LOC.last_line = AT_LOC.last_column = AT_LOC.first_line + 9; ])[ - } + + if (! (0 <= c && c <= strlen (source))) + abort (); + if (source[c]) + printf ("sending: '%c'", source[c]); else - { - printf ("sending: EOF\n"); - return EOF; - } + printf ("sending: END"); + printf (" (%d@%d-%d)\n", c, RANGE (]AT_LOC[)); + return source[c]; } ]AT_LALR1_CC_IF( -[/* Currently, print_ is required in C++. */ -void -yy::Parser::print_ () -{ - std::cerr << location; -} - -/* A C++ error reporting function. */ +[/* A C++ error reporting function. */ void -yy::Parser::error_ () +yy::parser::error (const location& l, const std::string& m) { - printf ("%d-%d: %s\n", RANGE (location), message.c_str()); + printf ("%d-%d: %s\n", RANGE (l), m.c_str()); } static bool yydebug; int yyparse () { - yy::Parser parser (yydebug, yy::Location ()); + yy::parser parser; + parser.set_debug_level (yydebug); return parser.parse (); } ], @@ -492,80 +350,957 @@ yyerror (const char *msg) }])[ int -main (void) +main (int argc, const char *argv[]) { + int status; yydebug = !!getenv ("YYDEBUG"); - if (yyparse ()) + assert (argc == 2); + source = argv[1]; + status = yyparse (); + switch (status) { - printf ("Parsing FAILED.\n"); - exit (1); + case 0: printf ("Successful parse.\n"); break; + case 1: printf ("Parsing FAILED.\n"); break; + default: printf ("Parsing FAILED (status %d).\n", status); break; } - printf ("Successful parse.\n"); - return 0; + return status; } ]]) AT_LALR1_CC_IF( - [AT_CHECK([bison -o input.cc input.y]) + [AT_BISON_CHECK([-o input.cc input.y]) AT_COMPILE_CXX([input])], - [AT_CHECK([bison -o input.c input.y]) + [AT_BISON_CHECK([-o input.c input.y]) AT_COMPILE([input])]) -AT_PARSER_CHECK([./input], 1, -[[sending: 'x' (0@0-9) -thing (0@0-9): 'x' (0@0-9) + + +# Check the location of "empty" +# ----------------------------- +# I.e., epsilon-reductions, as in "(x)" which ends by reducing +# an empty "line" nterm. +# FIXME: This location is not satisfying. Depend on the lookahead? +AT_PARSER_CHECK([./input '(x)'], 0, +[[sending: '(' (0@0-9) +sending: 'x' (1@10-19) +thing (1@10-19): 'x' (1@10-19) +sending: ')' (2@20-29) +line (0@0-29): '(' (0@0-9) thing (1@10-19) ')' (2@20-29) +sending: END (3@30-39) +input (0@29-29): /* Nothing */ +input (2@0-29): line (0@0-29) input (0@29-29) +Freeing token END (3@30-39) +Freeing nterm input (2@0-29) +Successful parse. +]]) + + +# Check locations in error recovery +# --------------------------------- +# '(y)' is an error, but can be recovered from. But what's the location +# of the error itself ('y'), and of the resulting reduction ('(error)'). +AT_PARSER_CHECK([./input '(y)'], 0, +[[sending: '(' (0@0-9) +sending: 'y' (1@10-19) +10-19: syntax error, unexpected 'y', expecting 'x' +Freeing token 'y' (1@10-19) +sending: ')' (2@20-29) +line (-1@0-29): '(' (0@0-9) error (@10-19) ')' (2@20-29) +sending: END (3@30-39) +input (0@29-29): /* Nothing */ +input (2@0-29): line (-1@0-29) input (0@29-29) +Freeing token END (3@30-39) +Freeing nterm input (2@0-29) +Successful parse. +]]) + + +# Syntax errors caught by the parser +# ---------------------------------- +# Exercise the discarding of stack top and input until `error' +# can be reduced. +# +# '(', 'x', 'x', 'x', 'x', 'x', ')', +# +# Load the stack and provoke an error that cannot be caught by the +# grammar, to check that the stack is cleared. And make sure the +# lookahead is freed. +# +# '(', 'x', ')', +# '(', 'x', ')', +# 'y' +AT_PARSER_CHECK([./input '(xxxxx)(x)(x)y'], 1, +[[sending: '(' (0@0-9) sending: 'x' (1@10-19) thing (1@10-19): 'x' (1@10-19) sending: 'x' (2@20-29) thing (2@20-29): 'x' (2@20-29) sending: 'x' (3@30-39) -30-39: syntax error, unexpected 'x', expecting ';' +30-39: syntax error, unexpected 'x', expecting ')' Freeing nterm thing (2@20-29) Freeing nterm thing (1@10-19) -Freeing nterm thing (0@0-9) Freeing token 'x' (3@30-39) sending: 'x' (4@40-49) Freeing token 'x' (4@40-49) sending: 'x' (5@50-59) Freeing token 'x' (5@50-59) -sending: ';' (6@60-69) -line (-1@0-69): error (@0-59) ';' (6@60-69) -sending: 'x' (7@70-79) -thing (7@70-79): 'x' (7@70-79) +sending: ')' (6@60-69) +line (-1@0-69): '(' (0@0-9) error (@10-59) ')' (6@60-69) +sending: '(' (7@70-79) sending: 'x' (8@80-89) thing (8@80-89): 'x' (8@80-89) -sending: ';' (9@90-99) -line (7@70-99): thing (7@70-79) thing (8@80-89) ';' (9@90-99) +sending: ')' (9@90-99) +line (7@70-99): '(' (7@70-79) thing (8@80-89) ')' (9@90-99) +sending: '(' (10@100-109) +sending: 'x' (11@110-119) +thing (11@110-119): 'x' (11@110-119) +sending: ')' (12@120-129) +line (10@100-129): '(' (10@100-109) thing (11@110-119) ')' (12@120-129) +sending: 'y' (13@130-139) +input (0@129-129): /* Nothing */ +input (2@100-129): line (10@100-129) input (0@129-129) +input (2@70-129): line (7@70-99) input (2@100-129) +input (2@0-129): line (-1@0-69) input (2@70-129) +130-139: syntax error, unexpected 'y', expecting END +Freeing nterm input (2@0-129) +Freeing token 'y' (13@130-139) +Parsing FAILED. +]]) + + +# Syntax error caught by the parser where lookahead = END +# -------------------------------------------------------- +# Load the stack and provoke an error that cannot be caught by the +# grammar, to check that the stack is cleared. And make sure the +# lookahead is freed. +# +# '(', 'x', ')', +# '(', 'x', ')', +# 'x' +AT_PARSER_CHECK([./input '(x)(x)x'], 1, +[[sending: '(' (0@0-9) +sending: 'x' (1@10-19) +thing (1@10-19): 'x' (1@10-19) +sending: ')' (2@20-29) +line (0@0-29): '(' (0@0-9) thing (1@10-19) ')' (2@20-29) +sending: '(' (3@30-39) +sending: 'x' (4@40-49) +thing (4@40-49): 'x' (4@40-49) +sending: ')' (5@50-59) +line (3@30-59): '(' (3@30-39) thing (4@40-49) ')' (5@50-59) +sending: 'x' (6@60-69) +thing (6@60-69): 'x' (6@60-69) +sending: END (7@70-79) +70-79: syntax error, unexpected END, expecting 'x' +Freeing nterm thing (6@60-69) +Freeing nterm line (3@30-59) +Freeing nterm line (0@0-29) +Freeing token END (7@70-79) +Parsing FAILED. +]]) + + +# Check destruction upon stack overflow +# ------------------------------------- +# Upon stack overflow, all symbols on the stack should be destroyed. +# Only check for yacc.c. +AT_YACC_IF([ +AT_PARSER_CHECK([./input '(x)(x)(x)(x)(x)(x)(x)'], 2, +[[sending: '(' (0@0-9) +sending: 'x' (1@10-19) +thing (1@10-19): 'x' (1@10-19) +sending: ')' (2@20-29) +line (0@0-29): '(' (0@0-9) thing (1@10-19) ')' (2@20-29) +sending: '(' (3@30-39) +sending: 'x' (4@40-49) +thing (4@40-49): 'x' (4@40-49) +sending: ')' (5@50-59) +line (3@30-59): '(' (3@30-39) thing (4@40-49) ')' (5@50-59) +sending: '(' (6@60-69) +sending: 'x' (7@70-79) +thing (7@70-79): 'x' (7@70-79) +sending: ')' (8@80-89) +line (6@60-89): '(' (6@60-69) thing (7@70-79) ')' (8@80-89) +sending: '(' (9@90-99) sending: 'x' (10@100-109) thing (10@100-109): 'x' (10@100-109) -sending: ';' (11@110-119) -line (10@100-119): thing (10@100-109) ';' (11@110-119) -sending: 'y' (12@120-129) -120-129: syntax error, unexpected $undefined, expecting $end or 'x' -sending: EOF -Freeing nterm line (10@100-119) -Freeing nterm line (7@70-99) -Freeing nterm line (-1@0-69) -Parsing FAILED. +sending: ')' (11@110-119) +line (9@90-119): '(' (9@90-99) thing (10@100-109) ')' (11@110-119) +sending: '(' (12@120-129) +sending: 'x' (13@130-139) +thing (13@130-139): 'x' (13@130-139) +sending: ')' (14@140-149) +line (12@120-149): '(' (12@120-129) thing (13@130-139) ')' (14@140-149) +sending: '(' (15@150-159) +sending: 'x' (16@160-169) +thing (16@160-169): 'x' (16@160-169) +sending: ')' (17@170-179) +line (15@150-179): '(' (15@150-159) thing (16@160-169) ')' (17@170-179) +sending: '(' (18@180-189) +sending: 'x' (19@190-199) +thing (19@190-199): 'x' (19@190-199) +sending: ')' (20@200-209) +200-209: memory exhausted +Freeing nterm thing (19@190-199) +Freeing nterm line (15@150-179) +Freeing nterm line (12@120-149) +Freeing nterm line (9@90-119) +Freeing nterm line (6@60-89) +Freeing nterm line (3@30-59) +Freeing nterm line (0@0-29) +Parsing FAILED (status 2). ]]) +]) -AT_CLEANUP ]) -# AT_CHECK_PRINTER_AND_DESTRUCTOR([BISON-OPTIONS], [UNION-FLAG]) -# -------------------------------------------------------------- -# Produce `calc.y'. +# AT_CHECK_PRINTER_AND_DESTRUCTOR([BISON-OPTIONS], [UNION-FLAG], [SKIP_FLAG]) +# --------------------------------------------------------------------------- m4_define([AT_CHECK_PRINTER_AND_DESTRUCTOR], -[_AT_CHECK_PRINTER_AND_DESTRUCTOR($[1], $[2], $[3], $[4], [$1], [$2]) +[AT_SETUP([Printers and Destructors $2: $1]) + +$3 +_AT_CHECK_PRINTER_AND_DESTRUCTOR($[1], $[2], $[3], $[4], +[%error-verbose +%debug +%verbose +%locations +$1], [$2]) + +AT_CLEANUP ]) AT_CHECK_PRINTER_AND_DESTRUCTOR([]) AT_CHECK_PRINTER_AND_DESTRUCTOR([], [with union]) -AT_CHECK_PRINTER_AND_DESTRUCTOR([%locations %defines %skeleton "lalr1.cc"]) -AT_CHECK_PRINTER_AND_DESTRUCTOR([%locations %defines %skeleton "lalr1.cc"], - [with union]) -# FIXME. These test cases fail. -#AT_CHECK_PRINTER_AND_DESTRUCTOR([%glr-parser]) -#AT_CHECK_PRINTER_AND_DESTRUCTOR([%glr-parser], [with union]) +AT_CHECK_PRINTER_AND_DESTRUCTOR([%defines %skeleton "lalr1.cc"]) +AT_CHECK_PRINTER_AND_DESTRUCTOR([%defines %skeleton "lalr1.cc"], [with union]) + +AT_CHECK_PRINTER_AND_DESTRUCTOR([%glr-parser]) +AT_CHECK_PRINTER_AND_DESTRUCTOR([%glr-parser], [with union]) + + + +## ----------------------------------------- ## +## Default tagless %printer and %destructor. ## +## ----------------------------------------- ## + +# Check that the right %printer and %destructor are called, that they're not +# called for $end, and that $$ and @$ work correctly. + +AT_SETUP([Default tagless %printer and %destructor]) + +AT_DATA_GRAMMAR([[input.y]], +[[%error-verbose +%debug +%locations +%initial-action { + @$.first_line = @$.last_line = 1; + @$.first_column = @$.last_column = 1; +} + +%{ +# include +# include + static void yyerror (const char *msg); + static int yylex (void); +# define USE(SYM) +%} + +%printer { + fprintf (yyoutput, "<*> printer should not be called.\n"); +} <*> + +%printer { + fprintf (yyoutput, "<> printer for '%c' @ %d", $$, @$.first_column); +} <> +%destructor { + fprintf (stdout, "<> destructor for '%c' @ %d.\n", $$, @$.first_column); +} <> + +%printer { + fprintf (yyoutput, "'b'/'c' printer for '%c' @ %d", $$, @$.first_column); +} 'b' 'c' +%destructor { + fprintf (stdout, "'b'/'c' destructor for '%c' @ %d.\n", $$, @$.first_column); +} 'b' 'c' + +%destructor { + fprintf (yyoutput, "<*> destructor should not be called.\n"); +} <*> + +%% + +start: 'a' 'b' 'c' 'd' 'e' { $$ = 'S'; USE(($1, $2, $3, $4, $5)); } ; + +%% + +static int +yylex (void) +{ + static char const input[] = "abcd"; + static size_t toknum; + if (! (toknum < sizeof input)) + abort (); + yylval = input[toknum++]; + yylloc.first_line = yylloc.last_line = 1; + yylloc.first_column = yylloc.last_column = toknum; + return yylval; +} + +static void +yyerror (const char *msg) +{ + fprintf (stderr, "%s\n", msg); +} + +int +main (void) +{ + yydebug = 1; + return yyparse (); +} +]]) + +AT_BISON_CHECK([-o input.c input.y]) +AT_COMPILE([input]) +AT_PARSER_CHECK([./input], 1, +[[<> destructor for 'd' @ 4. +'b'/'c' destructor for 'c' @ 3. +'b'/'c' destructor for 'b' @ 2. +<> destructor for 'a' @ 1. +]], +[[Starting parse +Entering state 0 +Reading a token: Next token is token 'a' (1.1-1.1: <> printer for 'a' @ 1) +Shifting token 'a' (1.1-1.1: <> printer for 'a' @ 1) +Entering state 1 +Reading a token: Next token is token 'b' (1.2-1.2: 'b'/'c' printer for 'b' @ 2) +Shifting token 'b' (1.2-1.2: 'b'/'c' printer for 'b' @ 2) +Entering state 3 +Reading a token: Next token is token 'c' (1.3-1.3: 'b'/'c' printer for 'c' @ 3) +Shifting token 'c' (1.3-1.3: 'b'/'c' printer for 'c' @ 3) +Entering state 5 +Reading a token: Next token is token 'd' (1.4-1.4: <> printer for 'd' @ 4) +Shifting token 'd' (1.4-1.4: <> printer for 'd' @ 4) +Entering state 6 +Reading a token: Now at end of input. +syntax error, unexpected $end, expecting 'e' +Error: popping token 'd' (1.4-1.4: <> printer for 'd' @ 4) +Stack now 0 1 3 5 +Error: popping token 'c' (1.3-1.3: 'b'/'c' printer for 'c' @ 3) +Stack now 0 1 3 +Error: popping token 'b' (1.2-1.2: 'b'/'c' printer for 'b' @ 2) +Stack now 0 1 +Error: popping token 'a' (1.1-1.1: <> printer for 'a' @ 1) +Stack now 0 +Cleanup: discarding lookahead token $end (1.5-1.5: ) +Stack now 0 +]]) + +AT_CLEANUP + + + +## ------------------------------------------------------ ## +## Default tagged and per-type %printer and %destructor. ## +## ------------------------------------------------------ ## + +AT_SETUP([Default tagged and per-type %printer and %destructor]) + +AT_DATA_GRAMMAR([[input.y]], +[[%error-verbose +%debug + +%{ +# include +# include + static void yyerror (const char *msg); + static int yylex (void); +# define USE(SYM) +%} + +%printer { + fprintf (yyoutput, "<> printer should not be called.\n"); +} <> + +%union { int field0; int field1; int field2; } +%type start 'a' 'g' +%type 'e' +%type 'f' +%printer { + fprintf (yyoutput, "<*>//e printer"); +} <*> 'e' +%destructor { + fprintf (stdout, "<*>//e destructor.\n"); +} <*> 'e' + +%type 'b' +%printer { fprintf (yyoutput, " printer"); } +%destructor { fprintf (stdout, " destructor.\n"); } + +%type 'c' +%printer { fprintf (yyoutput, "'c' printer"); } 'c' +%destructor { fprintf (stdout, "'c' destructor.\n"); } 'c' + +%type 'd' +%printer { fprintf (yyoutput, "'d' printer"); } 'd' +%destructor { fprintf (stdout, "'d' destructor.\n"); } 'd' + +%destructor { + fprintf (yyoutput, "<> destructor should not be called.\n"); +} <> + +%% + +start: + 'a' 'b' 'c' 'd' 'e' 'f' 'g' + { + USE(($1, $2, $3, $4, $5, $6, $7)); + $$ = 'S'; + } + ; + +%% + +static int +yylex (void) +{ + static char const input[] = "abcdef"; + static size_t toknum; + if (! (toknum < sizeof input)) + abort (); + return input[toknum++]; +} + +static void +yyerror (const char *msg) +{ + fprintf (stderr, "%s\n", msg); +} + +int +main (void) +{ + yydebug = 1; + return yyparse (); +} +]]) + +AT_BISON_CHECK([-o input.c input.y]) +AT_COMPILE([input]) +AT_PARSER_CHECK([./input], 1, +[[<*>//e destructor. +<*>//e destructor. +'d' destructor. +'c' destructor. + destructor. +<*>//e destructor. +]], +[[Starting parse +Entering state 0 +Reading a token: Next token is token 'a' (<*>//e printer) +Shifting token 'a' (<*>//e printer) +Entering state 1 +Reading a token: Next token is token 'b' ( printer) +Shifting token 'b' ( printer) +Entering state 3 +Reading a token: Next token is token 'c' ('c' printer) +Shifting token 'c' ('c' printer) +Entering state 5 +Reading a token: Next token is token 'd' ('d' printer) +Shifting token 'd' ('d' printer) +Entering state 6 +Reading a token: Next token is token 'e' (<*>//e printer) +Shifting token 'e' (<*>//e printer) +Entering state 7 +Reading a token: Next token is token 'f' (<*>//e printer) +Shifting token 'f' (<*>//e printer) +Entering state 8 +Reading a token: Now at end of input. +syntax error, unexpected $end, expecting 'g' +Error: popping token 'f' (<*>//e printer) +Stack now 0 1 3 5 6 7 +Error: popping token 'e' (<*>//e printer) +Stack now 0 1 3 5 6 +Error: popping token 'd' ('d' printer) +Stack now 0 1 3 5 +Error: popping token 'c' ('c' printer) +Stack now 0 1 3 +Error: popping token 'b' ( printer) +Stack now 0 1 +Error: popping token 'a' (<*>//e printer) +Stack now 0 +Cleanup: discarding lookahead token $end () +Stack now 0 +]]) + +AT_CLEANUP + + + +## ------------------------------------------------------------- ## +## Default %printer and %destructor for user-defined end token. ## +## ------------------------------------------------------------- ## + +AT_SETUP([Default %printer and %destructor for user-defined end token]) + +# _AT_CHECK_DEFAULT_PRINTER_AND_DESTRUCTOR_FOR_END_TOKEN(TYPED) +# ----------------------------------------------------------------------------- +m4_define([_AT_CHECK_DEFAULT_PRINTER_AND_DESTRUCTOR_FOR_END_TOKEN], +[m4_if($1, 0, + [m4_pushdef([kind], []) m4_pushdef([not_kind], [*])], + [m4_pushdef([kind], [*]) m4_pushdef([not_kind], [])]) + +AT_DATA_GRAMMAR([[input]]$1[[.y]], +[[%error-verbose +%debug +%locations +%initial-action { + @$.first_line = @$.last_line = 1; + @$.first_column = @$.last_column = 1; +} + +%{ +# include +# include + static void yyerror (const char *msg); + static int yylex (void); +# define USE(SYM) +%} + +%destructor { + fprintf (yyoutput, "<]]not_kind[[> destructor should not be called.\n"); +} <]]not_kind[[> + +%token END 0 +%printer { + fprintf (yyoutput, "<]]kind[[> for '%c' @ %d", $$, @$.first_column); +} <]]kind[[> +%destructor { + fprintf (stdout, "<]]kind[[> for '%c' @ %d.\n", $$, @$.first_column); +} <]]kind[[> + +%printer { + fprintf (yyoutput, "<]]not_kind[[> printer should not be called.\n"); +} <]]not_kind[[> + +]]m4_if($1, 0, [[[ +]]], +[[[%union { char tag; } +%type start END]]])[[ + +%% + +start: { $$ = 'S'; } ; + +%% + +static int +yylex (void) +{ + static int called; + if (called++) + abort (); + yylval]]m4_if($1, 0,, [[[.tag]]])[[ = 'E'; + yylloc.first_line = yylloc.last_line = 1; + yylloc.first_column = yylloc.last_column = 1; + return 0; +} + +static void +yyerror (const char *msg) +{ + fprintf (stderr, "%s\n", msg); +} + +int +main (void) +{ + yydebug = 1; + return yyparse (); +} +]]) + +AT_BISON_CHECK([-o input$1.c input$1.y]) +AT_COMPILE([input$1]) +AT_PARSER_CHECK([./input$1], 0, +[[<]]kind[[> for 'E' @ 1. +<]]kind[[> for 'S' @ 1. +]], +[[Starting parse +Entering state 0 +Reducing stack by rule 1 (line 46): +-> $$ = nterm start (1.1-1.1: <]]kind[[> for 'S' @ 1) +Stack now 0 +Entering state 1 +Reading a token: Now at end of input. +Shifting token END (1.1-1.1: <]]kind[[> for 'E' @ 1) +Entering state 2 +Stack now 0 1 2 +Cleanup: popping token END (1.1-1.1: <]]kind[[> for 'E' @ 1) +Cleanup: popping nterm start (1.1-1.1: <]]kind[[> for 'S' @ 1) +]]) + +m4_popdef([kind]) +m4_popdef([not_kind]) +]) + +_AT_CHECK_DEFAULT_PRINTER_AND_DESTRUCTOR_FOR_END_TOKEN(0) +_AT_CHECK_DEFAULT_PRINTER_AND_DESTRUCTOR_FOR_END_TOKEN(1) + +AT_CLEANUP + + + +## ------------------------------------------------------------------ ## +## Default %printer and %destructor are not for error or $undefined. ## +## ------------------------------------------------------------------ ## + +AT_SETUP([Default %printer and %destructor are not for error or $undefined]) + +# If Bison were to apply the default %printer and %destructor to the error +# token or to $undefined: +# - For the error token: +# - It would generate warnings for unused $n. +# - It would invoke the %printer and %destructor on the error token's +# semantic value, which would be initialized from the lookahead, which +# would be destroyed separately. +# - For $undefined, who knows what the semantic value would be. + +AT_DATA_GRAMMAR([[input.y]], +[[%debug + +%{ +# include +# include + static void yyerror (const char *msg); + static int yylex (void); +# define USE(SYM) +%} + +%printer { + fprintf (yyoutput, "'%c'", $$); +} <> <*> +%destructor { + fprintf (stderr, "DESTROY '%c'\n", $$); +} <> <*> + +%% + +start: + { $$ = 'S'; } + /* In order to reveal the problems that this bug caused during parsing, add + * $2 to USE. */ + | 'a' error 'b' 'c' { USE(($1, $3, $4)); $$ = 'S'; } + ; + +%% + +static int +yylex (void) +{ + static char const input[] = "abd"; + static size_t toknum; + if (! (toknum < sizeof input)) + abort (); + yylval = input[toknum++]; + return yylval; +} + +static void +yyerror (const char *msg) +{ + fprintf (stderr, "%s\n", msg); +} + +int +main (void) +{ + yydebug = 1; + return yyparse (); +} +]]) + +AT_BISON_CHECK([-o input.c input.y]) +AT_COMPILE([input]) +AT_PARSER_CHECK([./input], [1], [], +[[Starting parse +Entering state 0 +Reading a token: Next token is token 'a' ('a') +Shifting token 'a' ('a') +Entering state 1 +Reading a token: Next token is token 'b' ('b') +syntax error +Shifting token error () +Entering state 3 +Next token is token 'b' ('b') +Shifting token 'b' ('b') +Entering state 5 +Reading a token: Next token is token $undefined () +Error: popping token 'b' ('b') +DESTROY 'b' +Stack now 0 1 3 +Error: popping token error () +Stack now 0 1 +Shifting token error () +Entering state 3 +Next token is token $undefined () +Error: discarding token $undefined () +Error: popping token error () +Stack now 0 1 +Shifting token error () +Entering state 3 +Reading a token: Now at end of input. +Cleanup: discarding lookahead token $end () +Stack now 0 1 3 +Cleanup: popping token error () +Cleanup: popping token 'a' ('a') +DESTROY 'a' +]]) + +AT_CLEANUP + + + +## ------------------------------------------------------ ## +## Default %printer and %destructor are not for $accept. ## +## ------------------------------------------------------ ## + +AT_SETUP([Default %printer and %destructor are not for $accept]) + +# If YYSTYPE is a union and Bison were to apply the default %printer and +# %destructor to $accept: +# - The %printer and %destructor code generated for $accept would always be +# dead code because $accept is currently never shifted onto the stack. +# - $$ for $accept would always be of type YYSTYPE because it's not possible +# to declare `%type $accept'. (Also true for $undefined.) +# - Thus, the compiler might complain that the user code assumes the wrong +# type for $$ since the code might assume the type associated with a +# specific union field, which is especially reasonable in C++ since that +# type may be a base type. This test case checks for this problem. (Also +# true for $undefined and the error token, so there are three warnings for +# %printer and three for %destructor.) + +AT_DATA_GRAMMAR([[input.y]], +[[%debug /* So that %printer is actually compiled. */ + +%{ +# include +# include + static void yyerror (const char *msg); + static int yylex (void); +# define USE(SYM) +%} + +%printer { + char chr = $$; + fprintf (yyoutput, "'%c'", chr); +} <> <*> +%destructor { + char chr = $$; + fprintf (stderr, "DESTROY '%c'\n", chr); +} <> <*> + +%union { char chr; } +%type start + +%% + +start: { USE($$); } ; + +%% + +static int +yylex (void) +{ + static int called; + if (called++) + abort (); + return 0; +} + +static void +yyerror (const char *msg) +{ + fprintf (stderr, "%s\n", msg); +} + +int +main (void) +{ + return yyparse (); +} +]]) + +AT_BISON_CHECK([-o input.c input.y]) +AT_COMPILE([input]) + +AT_CLEANUP + + + +## ------------------------------------------------------ ## +## Default %printer and %destructor for mid-rule values. ## +## ------------------------------------------------------ ## + +AT_SETUP([Default %printer and %destructor for mid-rule values]) + +AT_DATA_GRAMMAR([[input.y]], +[[%debug /* So that %printer is actually compiled. */ + +%{ +# include +# include + static void yyerror (const char *msg); + static int yylex (void); +# define USE(SYM) +# define YYLTYPE int +# define YYLLOC_DEFAULT(Current, Rhs, N) +# define YY_LOCATION_PRINT(File, Loc) +%} + +%printer { fprintf (yyoutput, "%d", @$); } <> +%destructor { fprintf (stderr, "DESTROY %d\n", @$); } <> +%printer { fprintf (yyoutput, "<*> printer should not be called"); } <*> +%destructor { fprintf (yyoutput, "<*> destructor should not be called"); } <*> + +%% + +start: + { @$ = 1; } // Not set or used. + { USE ($$); @$ = 2; } // Both set and used. + { USE ($$); @$ = 3; } // Only set. + { @$ = 4; } // Only used. + 'c' + { USE (($$, $2, $4, $5)); @$ = 0; } + ; + +%% + +static int +yylex (void) +{ + static int called; + if (called++) + abort (); + return 0; +} + +static void +yyerror (const char *msg) +{ + fprintf (stderr, "%s\n", msg); +} + +int +main (void) +{ + yydebug = 1; + return yyparse (); +} +]]) + +AT_BISON_CHECK([-o input.c input.y], 0,, +[[input.y:33.3-23: warning: unset value: $$ +input.y:30.3-35.37: warning: unused value: $3 +]]) + +AT_COMPILE([input]) +AT_PARSER_CHECK([./input], 1,, +[[Starting parse +Entering state 0 +Reducing stack by rule 1 (line 30): +-> $$ = nterm $@1 (: ) +Stack now 0 +Entering state 2 +Reducing stack by rule 2 (line 31): +-> $$ = nterm @2 (: 2) +Stack now 0 2 +Entering state 4 +Reducing stack by rule 3 (line 32): +-> $$ = nterm @3 (: 3) +Stack now 0 2 4 +Entering state 5 +Reducing stack by rule 4 (line 33): +-> $$ = nterm @4 (: 4) +Stack now 0 2 4 5 +Entering state 6 +Reading a token: Now at end of input. +syntax error +Error: popping nterm @4 (: 4) +DESTROY 4 +Stack now 0 2 4 5 +Error: popping nterm @3 (: 3) +DESTROY 3 +Stack now 0 2 4 +Error: popping nterm @2 (: 2) +DESTROY 2 +Stack now 0 2 +Error: popping nterm $@1 (: ) +Stack now 0 +Cleanup: discarding lookahead token $end (: ) +Stack now 0 +]]) + +AT_CLEANUP + + +## ----------------------- ## +## @$ implies %locations. ## +## ----------------------- ## + +# Bison once forgot to check for @$ in actions other than semantic actions. + +# AT_CHECK_ACTION_LOCATIONS(ACTION-DIRECTIVE) +# ------------------------------------------------------- +m4_define([AT_CHECK_ACTION_LOCATIONS], +[AT_SETUP([[@$ in ]$1[ implies %locations]]) + +AT_DATA_GRAMMAR([[input.y]], +[[%code { + #include + static int yylex (void); + static void yyerror (char const *msg); +} + +%debug + +]$1[ { + printf ("%d\n", @$.first_line); +} ]m4_if($1, [%initial-action], [], [[start]])[ + +%% + +start: ; + +%% + +static int +yylex (void) +{ + return 0; +} + +static void +yyerror (char const *msg) +{ + fprintf (stderr, "%s\n", msg); +} + +int +main (void) +{ + return yyparse (); +} +]]) + +AT_BISON_CHECK([[-o input.c input.y]]) +AT_COMPILE([[input]]) + +AT_CLEANUP]) + +AT_CHECK_ACTION_LOCATIONS([[%initial-action]]) +AT_CHECK_ACTION_LOCATIONS([[%destructor]]) +AT_CHECK_ACTION_LOCATIONS([[%printer]])