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
static int
yylex (void)
{
+ static int called;
+ if (called++)
+ abort ();
return EOF;
}
# helping macros. So don't put any directly in the Bison file.
AT_BISON_OPTION_PUSHDEFS([$5])
AT_DATA_GRAMMAR([[input.y]],
-[[%start-header {
+[[%requires {
#include <stdio.h>
#include <stdlib.h>
+#include <string.h>
#include <assert.h>
#define YYINITDEPTH 10
int ival;
}])
AT_LALR1_CC_IF([%define "global_tokens_and_yystype"])
-m4_ifval([$6], [[%end-header {]], [[%after-header {]])
-AT_LALR1_CC_IF([typedef yy::location YYLTYPE;
- m4_ifval([$6], , [#define YYSTYPE int])])
+m4_ifval([$6], [[%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);])
[}
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
-## --------------------------------- ##
-## Default %printer and %destructor. ##
-## --------------------------------- ##
+## ----------------------------------------- ##
+## Default tagless %printer and %destructor. ##
+## ----------------------------------------- ##
# Check that the right %printer and %destructor are called, that they're not
# called for $end, and that $$ and @$ work correctly.
-AT_SETUP([Default %printer and %destructor])
+AT_SETUP([Default tagless %printer and %destructor])
AT_DATA_GRAMMAR([[input.y]],
[[%error-verbose
%}
%printer {
- fprintf (yyoutput, "Default printer for '%c' @ %d", $$, @$.first_column);
-} %symbol-default
+ fprintf (yyoutput, "<*> printer should not be called.\n");
+} <*>
+
+%printer {
+ fprintf (yyoutput, "<> printer for '%c' @ %d", $$, @$.first_column);
+} <>
%destructor {
- fprintf (stdout, "Default destructor for '%c' @ %d.\n", $$, @$.first_column);
-} %symbol-default
+ fprintf (stdout, "<> destructor for '%c' @ %d.\n", $$, @$.first_column);
+} <>
%printer {
fprintf (yyoutput, "'b'/'c' printer for '%c' @ %d", $$, @$.first_column);
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 const char *input = "abcd";
- static int column = 1;
- yylval = *input++;
+ 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 = column++;
+ yylloc.first_column = yylloc.last_column = toknum;
return yylval;
}
AT_CHECK([bison -o input.c input.y])
AT_COMPILE([input])
AT_PARSER_CHECK([./input], 1,
-[[Default destructor for 'd' @ 4.
+[[<> destructor for 'd' @ 4.
'b'/'c' destructor for 'c' @ 3.
'b'/'c' destructor for 'b' @ 2.
-Default destructor for 'a' @ 1.
+<> destructor for 'a' @ 1.
]],
[[Starting parse
Entering state 0
-Reading a token: Next token is token 'a' (1.1-1.1: Default printer for 'a' @ 1)
-Shifting token 'a' (1.1-1.1: Default printer for 'a' @ 1)
+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)
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: Default printer for 'd' @ 4)
-Shifting token 'd' (1.4-1.4: Default printer for 'd' @ 4)
+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: Default printer for 'd' @ 4)
+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: Default printer for 'a' @ 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
-## ----------------------------------- ##
-## Per-type %printer and %destructor. ##
-## ----------------------------------- ##
+## ------------------------------------------------------ ##
+## Default tagged and per-type %printer and %destructor. ##
+## ------------------------------------------------------ ##
-AT_SETUP([Per-type %printer and %destructor])
+AT_SETUP([Default tagged and per-type %printer and %destructor])
AT_DATA_GRAMMAR([[input.y]],
[[%error-verbose
# define USE(SYM)
%}
+%printer {
+ fprintf (yyoutput, "<> printer should not be called.\n");
+} <>
+
%union { int field0; int field1; int field2; }
%type <field0> start 'a' 'g'
%type <field1> 'e'
%type <field2> 'f'
%printer {
- fprintf (yyoutput, "%%symbol-default/<field2>/e printer");
-} %symbol-default 'e' <field2>
+ fprintf (yyoutput, "<*>/<field2>/e printer");
+} <*> 'e' <field2>
%destructor {
- fprintf (stdout, "%%symbol-default/<field2>/e destructor.\n");
-} %symbol-default 'e' <field2>
+ fprintf (stdout, "<*>/<field2>/e destructor.\n");
+} <*> 'e' <field2>
%type <field1> 'b'
%printer { fprintf (yyoutput, "<field1> printer"); } <field1>
%printer { fprintf (yyoutput, "'d' printer"); } 'd'
%destructor { fprintf (stdout, "'d' destructor.\n"); } 'd'
+%destructor {
+ fprintf (yyoutput, "<> destructor should not be called.\n");
+} <>
+
%%
start:
static int
yylex (void)
{
- static const char *input = "abcdef";
- return *input++;
+ static char const input[] = "abcdef";
+ static size_t toknum;
+ if (! (toknum < sizeof input))
+ abort ();
+ return input[toknum++];
}
static void
AT_CHECK([bison -o input.c input.y])
AT_COMPILE([input])
AT_PARSER_CHECK([./input], 1,
-[[%symbol-default/<field2>/e destructor.
-%symbol-default/<field2>/e destructor.
+[[<*>/<field2>/e destructor.
+<*>/<field2>/e destructor.
'd' destructor.
'c' destructor.
<field1> destructor.
-%symbol-default/<field2>/e destructor.
+<*>/<field2>/e destructor.
]],
[[Starting parse
Entering state 0
-Reading a token: Next token is token 'a' (%symbol-default/<field2>/e printer)
-Shifting token 'a' (%symbol-default/<field2>/e printer)
+Reading a token: Next token is token 'a' (<*>/<field2>/e printer)
+Shifting token 'a' (<*>/<field2>/e printer)
Entering state 1
Reading a token: Next token is token 'b' (<field1> printer)
Shifting token 'b' (<field1> printer)
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' (%symbol-default/<field2>/e printer)
-Shifting token 'e' (%symbol-default/<field2>/e printer)
+Reading a token: Next token is token 'e' (<*>/<field2>/e printer)
+Shifting token 'e' (<*>/<field2>/e printer)
Entering state 7
-Reading a token: Next token is token 'f' (%symbol-default/<field2>/e printer)
-Shifting token 'f' (%symbol-default/<field2>/e printer)
+Reading a token: Next token is token 'f' (<*>/<field2>/e printer)
+Shifting token 'f' (<*>/<field2>/e printer)
Entering state 8
Reading a token: Now at end of input.
syntax error, unexpected $end, expecting 'g'
-Error: popping token 'f' (%symbol-default/<field2>/e printer)
+Error: popping token 'f' (<*>/<field2>/e printer)
Stack now 0 1 3 5 6 7
-Error: popping token 'e' (%symbol-default/<field2>/e printer)
+Error: popping token 'e' (<*>/<field2>/e printer)
Stack now 0 1 3 5 6
Error: popping token 'd' ('d' printer)
Stack now 0 1 3 5
Stack now 0 1 3
Error: popping token 'b' (<field1> printer)
Stack now 0 1
-Error: popping token 'a' (%symbol-default/<field2>/e printer)
+Error: popping token 'a' (<*>/<field2>/e printer)
Stack now 0
Cleanup: discarding lookahead token $end ()
Stack now 0
## ------------------------------------------------------------- ##
-## Default %printer and %destructor for user-defined end token. ##
+## Default %printer and %destructor for user-defined end token. ##
## ------------------------------------------------------------- ##
AT_SETUP([Default %printer and %destructor for user-defined end token])
-AT_DATA_GRAMMAR([[input.y]],
+# _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
# define USE(SYM)
%}
+%destructor {
+ fprintf (yyoutput, "<]]not_kind[[> destructor should not be called.\n");
+} <]]not_kind[[>
+
%token END 0
%printer {
- fprintf (yyoutput, "Default printer for '%c' @ %d", $$, @$.first_column);
-} %symbol-default
+ fprintf (yyoutput, "<]]kind[[> for '%c' @ %d", $$, @$.first_column);
+} <]]kind[[>
%destructor {
- fprintf (stdout, "Default destructor for '%c' @ %d.\n", $$, @$.first_column);
-} %symbol-default
+ fprintf (stdout, "<]]kind[[> for '%c' @ %d.\n", $$, @$.first_column);
+} <]]kind[[>
+
+%printer {
+ fprintf (yyoutput, "<]]not_kind[[> printer should not be called.\n");
+} <]]not_kind[[>
+
+]]m4_if($1, 0, [[[
+]]],
+[[[%union { char tag; }
+%type <tag> start END]]])[[
%%
static int
yylex (void)
{
- yylval = 'E';
+ 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;
}
]])
-AT_CHECK([bison -o input.c input.y])
-AT_COMPILE([input])
-AT_PARSER_CHECK([./input], 0,
-[[Default destructor for 'E' @ 1.
-Default destructor for 'S' @ 1.
+AT_CHECK([bison -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 37):
--> $$ = nterm start (1.1-1.1: Default printer for 'S' @ 1)
+Reducing stack by rule 1 (line 46):
+-> $$ = 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: Default printer for 'E' @ 1)
+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: Default printer for 'E' @ 1)
-Cleanup: popping nterm start (1.1-1.1: Default printer for 'S' @ 1)
+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])
+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:
%{
# include <stdio.h>
+# include <stdlib.h>
static void yyerror (const char *msg);
static int yylex (void);
# define USE(SYM)
%printer {
fprintf (yyoutput, "'%c'", $$);
-} %symbol-default
+} <> <*>
%destructor {
fprintf (stderr, "DESTROY '%c'\n", $$);
-} %symbol-default
+} <> <*>
%%
static int
yylex (void)
{
- static const char *input = "abd";
- yylval = *input++;
+ static char const input[] = "abd";
+ static size_t toknum;
+ if (! (toknum < sizeof input))
+ abort ();
+ yylval = input[toknum++];
return yylval;
}
## Default %printer and %destructor are not for $accept. ##
## ------------------------------------------------------ ##
-AT_SETUP([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:
%{
# include <stdio.h>
+# include <stdlib.h>
static void yyerror (const char *msg);
static int yylex (void);
# define USE(SYM)
%printer {
char chr = $$;
fprintf (yyoutput, "'%c'", chr);
-} %symbol-default
+} <> <*>
%destructor {
char chr = $$;
fprintf (stderr, "DESTROY '%c'\n", chr);
-} %symbol-default
+} <> <*>
%union { char chr; }
%type <chr> start
static int
yylex (void)
{
+ static int called;
+ if (called++)
+ abort ();
return 0;
}
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 <stdio.h>
+# include <stdlib.h>
+ 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 (($$, $2, $4, $5)); @$ = 0; }
+ ;
+
+%%
+
+static int
+yylex (void)
+{
+ static int called;
+ if (called++)
+ abort ();
+ return 0;
+}
+
+static void
+yyerror (const char *msg)
+{
+ fprintf (stderr, "%s\n", msg);
+}
+
+int
+main (void)
+{
+ yydebug = 1;
+ return yyparse ();
+}
+]])
+
+AT_CHECK([bison -o input.c input.y], 0,,
+[[input.y:33.3-23: warning: unset value: $$
+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
projects / bison.git / blobdiff