X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/8617d87e24367e817e00d209b0de40944ce2964b..cb9ec4fada480554cf47810fee736997d64e7427:/tests/input.at

diff --git a/tests/input.at b/tests/input.at
index eb98cca4..3d3cf98e 100644
--- a/tests/input.at
+++ b/tests/input.at
@@ -60,9 +60,9 @@ exp: foo { $$; } foo { $2; } foo
 AT_BISON_CHECK([input.y], [1], [],
 [[input.y:5.12-13: $$ for the midrule at $2 of 'exp' has no declared type
 input.y:5.24-25: $2 of 'exp' has no declared type
-input.y:5.6-32: warning: type clash on default action: <bar> != <>
-input.y:6.6-8: warning: type clash on default action: <bar> != <>
-input.y:7.5: warning: empty rule for typed nonterminal, and no action
+input.y:5.6-32: warning: type clash on default action: <bar> != <> [-Wother]
+input.y:6.6-8: warning: type clash on default action: <bar> != <> [-Wother]
+input.y:7.5: warning: empty rule for typed nonterminal, and no action [-Wother]
 ]])
 
 AT_CLEANUP
@@ -72,7 +72,6 @@ AT_CLEANUP
 # --------------------------------
 # Generate the token, type, and destructor
 # declarations for the unused values tests.
-
 m4_define([_AT_UNUSED_VALUES_DECLARATIONS],
 [[[%token <integer> INT;
 %type <integer> a b c d e f g h i j k l;
@@ -80,15 +79,11 @@ m4_define([_AT_UNUSED_VALUES_DECLARATIONS],
 
 
 # AT_CHECK_UNUSED_VALUES(DECLARATIONS_AFTER, CHECK_MIDRULE_VALUES)
-# ------------------------------------------------------------------
-# Generate a grammar to test unused values,
-# compile it, run it.  If DECLARATIONS_AFTER
-# is set, then the token, type, and destructor
-# declarations are generated after the rules
-# rather than before.  If CHECK_MIDRULE_VALUES
-# is set, then --warnings=midrule-values is
-# set.
-
+# ----------------------------------------------------------------
+# Generate a grammar to test unused values, compile it, run it.  If
+# DECLARATIONS_AFTER is set, then the token, type, and destructor
+# declarations are generated after the rules rather than before.  If
+# CHECK_MIDRULE_VALUES is set, then --warnings=midrule-values is set.
 m4_define([AT_CHECK_UNUSED_VALUES],
 [AT_DATA([input.y],
 m4_ifval($1, [
@@ -118,39 +113,39 @@ _AT_UNUSED_VALUES_DECLARATIONS])
 )
 
 AT_BISON_CHECK(m4_ifval($2, [ --warnings=midrule-values ])[ input.y], [0], [],
-[[input.y:11.10-32: warning: unset value: $]$[
-input.y:11.10-32: warning: unused value: $]1[
-input.y:11.10-32: warning: unused value: $]3[
-input.y:11.10-32: warning: unused value: $]5[
-input.y:12.9: warning: empty rule for typed nonterminal, and no action
-]]m4_ifval($2, [[[input.y:13.14-20: warning: unset value: $$
-input.y:13.26-41: warning: unset value: $$
-]]])[[input.y:13.10-62: warning: unset value: $]$[
-input.y:13.10-62: warning: unused value: $]3[
-input.y:13.10-62: warning: unused value: $]5[
-]]m4_ifval($2, [[[input.y:14.14-16: warning: unset value: $$
-]]])[[input.y:14.10-49: warning: unset value: $]$[
-input.y:14.10-49: warning: unused value: $]3[
-input.y:14.10-49: warning: unused value: $]5[
-input.y:15.10-37: warning: unset value: $]$[
-input.y:15.10-37: warning: unused value: $]3[
-input.y:15.10-37: warning: unused value: $]5[
-input.y:17.10-58: warning: unset value: $]$[
-input.y:17.10-58: warning: unused value: $]1[
-]]m4_ifval($2, [[[input.y:17.10-58: warning: unused value: $]2[
-]]])[[input.y:17.10-58: warning: unused value: $]3[
-]]m4_ifval($2, [[[input.y:17.10-58: warning: unused value: $]4[
-]]])[[input.y:17.10-58: warning: unused value: $]5[
-input.y:18.10-72: warning: unset value: $]$[
-input.y:18.10-72: warning: unused value: $]1[
-input.y:18.10-72: warning: unused value: $]3[
-]]m4_ifval($2, [[[input.y:18.10-72: warning: unused value: $]4[
-]]])[[input.y:18.10-72: warning: unused value: $]5[
-]]m4_ifval($2, [[[input.y:20.10-55: warning: unused value: $]3[
-]]])[[input.y:21.10-68: warning: unset value: $]$[
-input.y:21.10-68: warning: unused value: $]1[
-input.y:21.10-68: warning: unused value: $]2[
-]]m4_ifval($2, [[[input.y:21.10-68: warning: unused value: $]4[
+[[input.y:11.10-32: warning: unset value: $]$[ [-Wother]
+input.y:11.10-32: warning: unused value: $]1[ [-Wother]
+input.y:11.10-32: warning: unused value: $]3[ [-Wother]
+input.y:11.10-32: warning: unused value: $]5[ [-Wother]
+input.y:12.9: warning: empty rule for typed nonterminal, and no action [-Wother]
+]]m4_ifval($2, [[[input.y:13.14-20: warning: unset value: $$ [-Wmidrule-values]
+input.y:13.26-41: warning: unset value: $$ [-Wmidrule-values]
+]]])[[input.y:13.10-62: warning: unset value: $]$[ [-Wother]
+input.y:13.10-62: warning: unused value: $]3[ [-Wother]
+input.y:13.10-62: warning: unused value: $]5[ [-Wother]
+]]m4_ifval($2, [[[input.y:14.14-16: warning: unset value: $$ [-Wmidrule-values]
+]]])[[input.y:14.10-49: warning: unset value: $]$[ [-Wother]
+input.y:14.10-49: warning: unused value: $]3[ [-Wother]
+input.y:14.10-49: warning: unused value: $]5[ [-Wother]
+input.y:15.10-37: warning: unset value: $]$[ [-Wother]
+input.y:15.10-37: warning: unused value: $]3[ [-Wother]
+input.y:15.10-37: warning: unused value: $]5[ [-Wother]
+input.y:17.10-58: warning: unset value: $]$[ [-Wother]
+input.y:17.10-58: warning: unused value: $]1[ [-Wother]
+]]m4_ifval($2, [[[input.y:17.10-58: warning: unused value: $]2[ [-Wmidrule-values]
+]]])[[input.y:17.10-58: warning: unused value: $]3[ [-Wother]
+]]m4_ifval($2, [[[input.y:17.10-58: warning: unused value: $]4[ [-Wmidrule-values]
+]]])[[input.y:17.10-58: warning: unused value: $]5[ [-Wother]
+input.y:18.10-72: warning: unset value: $]$[ [-Wother]
+input.y:18.10-72: warning: unused value: $]1[ [-Wother]
+input.y:18.10-72: warning: unused value: $]3[ [-Wother]
+]]m4_ifval($2, [[[input.y:18.10-72: warning: unused value: $]4[ [-Wmidrule-values]
+]]])[[input.y:18.10-72: warning: unused value: $]5[ [-Wother]
+]]m4_ifval($2, [[[input.y:20.10-55: warning: unused value: $]3[ [-Wmidrule-values]
+]]])[[input.y:21.10-68: warning: unset value: $]$[ [-Wother]
+input.y:21.10-68: warning: unused value: $]1[ [-Wother]
+input.y:21.10-68: warning: unused value: $]2[ [-Wother]
+]]m4_ifval($2, [[[input.y:21.10-68: warning: unused value: $]4[ [-Wmidrule-values]
 ]]]))])
 
 
@@ -205,29 +200,29 @@ start: ;
 ]])
 
 AT_BISON_CHECK([input.y], [1], [],
-[[input.y:1.13-29: redeclaration for default tagged %destructor
+[[input.y:1.13-29: %destructor redeclaration for <*>
 input.y:1.13-29: previous declaration
-input.y:2.10-24: redeclaration for default tagged %printer
+input.y:2.10-24: %printer redeclaration for <*>
 input.y:2.10-24: previous declaration
-input.y:4.13-29: redeclaration for default tagged %destructor
+input.y:4.13-29: %destructor redeclaration for <*>
 input.y:1.13-29: previous declaration
-input.y:5.10-24: redeclaration for default tagged %printer
+input.y:5.10-24: %printer redeclaration for <*>
 input.y:2.10-24: previous declaration
-input.y:7.13-29: redeclaration for default tagless %destructor
+input.y:7.13-29: %destructor redeclaration for <>
 input.y:7.13-29: previous declaration
-input.y:8.10-24: redeclaration for default tagless %printer
+input.y:8.10-24: %printer redeclaration for <>
 input.y:8.10-24: previous declaration
-input.y:10.13-29: redeclaration for default tagless %destructor
+input.y:10.13-29: %destructor redeclaration for <>
 input.y:7.13-29: previous declaration
-input.y:11.10-24: redeclaration for default tagless %printer
+input.y:11.10-24: %printer redeclaration for <>
 input.y:8.10-24: previous declaration
-input.y:17.13-29: redeclaration for default tagged %destructor
+input.y:17.13-29: %destructor redeclaration for <*>
 input.y:4.13-29: previous declaration
-input.y:18.10-24: redeclaration for default tagged %printer
+input.y:18.10-24: %printer redeclaration for <*>
 input.y:5.10-24: previous declaration
-input.y:20.13-29: redeclaration for default tagless %destructor
+input.y:20.13-29: %destructor redeclaration for <>
 input.y:10.13-29: previous declaration
-input.y:21.10-24: redeclaration for default tagless %printer
+input.y:21.10-24: %printer redeclaration for <>
 input.y:11.10-24: previous declaration
 ]])
 
@@ -276,6 +271,122 @@ input.y:5.10-24: previous declaration
 
 AT_CLEANUP
 
+## ----------------------------------------------------- ##
+## Undeclared symbols used for a printer or destructor.  ##
+## ----------------------------------------------------- ##
+
+AT_SETUP([Undeclared symbols used for a printer or destructor])
+
+AT_DATA([[input.y]],
+[[%printer {} foo baz
+%destructor {} bar
+
+%%
+exp: bar;
+]])
+
+AT_BISON_CHECK([input.y], [1], [],
+[[input.y:2.16-18: symbol bar is used, but is not defined as a token and has no rules
+input.y:1.17-19: warning: symbol baz is used, but is not defined as a token and has no rules [-Wother]
+input.y:1.13-15: warning: symbol foo is used, but is not defined as a token and has no rules [-Wother]
+]])
+
+AT_CLEANUP
+
+
+## ----------------------------------------------------- ##
+## Unassociated types used for a printer or destructor.  ##
+## ----------------------------------------------------- ##
+
+AT_SETUP([Unassociated types used for a printer or destructor])
+
+AT_DATA([[input.y]],
+[[%token <type1> tag1
+%type <type2> tag2
+
+%printer { } <type1> <type3>
+%destructor { } <type2> <type4>
+
+%%
+
+exp: tag1 { $1; }
+   | tag2 { $1; }
+
+tag2: "a" { $$; }
+]])
+
+AT_BISON_CHECK([input.y], [0], [],
+[[input.y:4.22-28: warning: type <type3> is used, but is not associated to any symbol [-Wother]
+input.y:5.25-31: warning: type <type4> is used, but is not associated to any symbol [-Wother]
+]])
+
+AT_CLEANUP
+
+
+## --------------------------------- ##
+## Useless printers or destructors.  ##
+## --------------------------------- ##
+
+AT_SETUP([Useless printers or destructors])
+
+# AT_TEST([INPUT], [STDERR])
+# --------------------------
+m4_pushdef([AT_TEST],
+[AT_DATA([[input.y]],
+[$1
+])
+AT_BISON_CHECK([input.y], [0], [], [$2
+])])
+
+AT_TEST([[%token <type1> token1
+%token <type2> token2
+%token <type3> token3
+%token <type4> token4
+%token <type5> token51 token52
+%token <type6> token61 token62
+%token <type7> token7
+
+%printer {} token1
+%destructor {} token2
+%printer {} token51
+%destructor {} token61
+
+%printer {} token7
+
+%printer {} <type1>
+%destructor {} <type2>
+%printer {} <type3>
+%destructor {} <type4>
+
+%printer {} <type5>
+%destructor {} <type6>
+
+%destructor {} <type7>
+
+%%
+exp: "a";]],
+[[input.y:16.13-19: warning: useless %printer for type <type1> [-Wother]
+input.y:17.16-22: warning: useless %destructor for type <type2> [-Wother]]])
+
+# If everybody is typed, <> is useless.
+AT_TEST([[%type <type> exp
+%token <type> a
+%printer {} <> <*>
+%%
+exp: a;]],
+[[input.y:3.13-14: warning: useless %printer for type <> [-Wother]]])
+
+# If nobody is typed, <*> is useless.
+AT_TEST([[%token a
+%printer {} <> <*>
+%%
+exp: a;]],
+[[input.y:2.16-18: warning: useless %printer for type <*> [-Wother]]])
+
+m4_popdef([AT_TEST])
+
+AT_CLEANUP
+
 
 ## ---------------------------------------- ##
 ## Unused values with default %destructor.  ##
@@ -295,9 +406,9 @@ tagged: { } ;
 ]])
 
 AT_BISON_CHECK([input.y], [0], [],
-[[input.y:6.8-45: warning: unset value: $$
-input.y:6.8-45: warning: unused value: $2
-input.y:7.6-8: warning: unset value: $$
+[[input.y:6.8-45: warning: unset value: $$ [-Wother]
+input.y:6.8-45: warning: unused value: $2 [-Wother]
+input.y:7.6-8: warning: unset value: $$ [-Wother]
 ]])
 
 AT_DATA([[input.y]],
@@ -312,8 +423,8 @@ tagged: { } ;
 ]])
 
 AT_BISON_CHECK([input.y], [0], [],
-[[input.y:6.8-45: warning: unused value: $4
-input.y:8.9-11: warning: unset value: $$
+[[input.y:6.8-45: warning: unused value: $4 [-Wother]
+input.y:8.9-11: warning: unset value: $$ [-Wother]
 ]])
 
 AT_CLEANUP
@@ -336,9 +447,9 @@ end: { }  ;
 ]])
 
 AT_BISON_CHECK([input.y], [0], [],
-[[input.y:6.8-22: warning: unset value: $$
-input.y:6.8-22: warning: unused value: $2
-input.y:7.6-8: warning: unset value: $$
+[[input.y:6.8-22: warning: unset value: $$ [-Wother]
+input.y:6.8-22: warning: unused value: $2 [-Wother]
+input.y:7.6-8: warning: unset value: $$ [-Wother]
 ]])
 
 AT_CLEANUP
@@ -516,7 +627,7 @@ yylex (void)
 }
 ]])
 
-# Pacify Emacs' font-lock-mode: "
+# Pacify Emacs'font-lock-mode: "
 
 AT_DATA([main.c],
 [[typedef int value;
@@ -595,8 +706,8 @@ AT_CHECK_REQUIRE(100.0, 63)
 
 AT_SETUP([String aliases for character tokens])
 
-# Bison once thought a character token and its alias were different symbols
-# with the same user token number.
+# Bison once thought a character token and its alias were different
+# symbols with the same user token number.
 
 AT_DATA_GRAMMAR([input.y],
 [[%token 'a' "a"
@@ -640,14 +751,14 @@ AT_BISON_OPTION_POPDEFS
 
 # POSIX Yacc accept periods, but not dashes.
 AT_BISON_CHECK([--yacc input.y], [1], [],
-[[input.y:9.8-16: POSIX Yacc forbids dashes in symbol names: WITH-DASH
-input.y:18.8-16: POSIX Yacc forbids dashes in symbol names: with-dash
+[[input.y:9.8-16: POSIX Yacc forbids dashes in symbol names: WITH-DASH [-Wyacc]
+input.y:18.8-16: POSIX Yacc forbids dashes in symbol names: with-dash [-Wyacc]
 ]])
 
 # So warn about them.
 AT_BISON_CHECK([-Wyacc input.y], [], [],
-[[input.y:9.8-16: warning: POSIX Yacc forbids dashes in symbol names: WITH-DASH
-input.y:18.8-16: warning: POSIX Yacc forbids dashes in symbol names: with-dash
+[[input.y:9.8-16: warning: POSIX Yacc forbids dashes in symbol names: WITH-DASH [-Wyacc]
+input.y:18.8-16: warning: POSIX Yacc forbids dashes in symbol names: with-dash [-Wyacc]
 ]])
 
 # Dashes are fine for GNU Bison.
@@ -720,10 +831,10 @@ AT_CLEANUP
 
 AT_SETUP([Unclosed constructs])
 
-# Bison's scan-gram.l once forgot to STRING_FINISH some unclosed constructs, so
-# they were prepended to whatever it STRING_GROW'ed next.  It also threw them
-# away rather than returning them to the parser.  The effect was confusing
-# subsequent error messages.
+# Bison's scan-gram.l once forgot to STRING_FINISH some unclosed
+# constructs, so they were prepended to whatever it STRING_GROW'ed
+# next.  It also threw them away rather than returning them to the
+# parser.  The effect was confusing subsequent error messages.
 
 AT_DATA([input.y],
 [[%token A "a
@@ -765,8 +876,8 @@ AT_CLEANUP
 
 AT_SETUP([%start after first rule])
 
-# Bison once complained that a %start after the first rule was a redeclaration
-# of the start symbol.
+# Bison once complained that a %start after the first rule was a
+# redeclaration of the start symbol.
 
 AT_DATA([input.y],
 [[%%
@@ -815,7 +926,7 @@ start: %prec PREC ;
 ]])
 
 AT_BISON_CHECK([[input.y]], [[0]], [],
-[[input.y:2.8-17: warning: token for %prec is not defined: PREC
+[[input.y:2.8-17: warning: token for %prec is not defined: PREC [-Wother]
 ]])
 
 AT_CLEANUP
@@ -1083,6 +1194,17 @@ AT_BISON_CHECK([[input.y]], [1], [],
 [[input.y:1.9-34: invalid value for %define Boolean variable 'lr.keep-unreachable-states'
 ]])
 
+AT_DATA([[input.y]],
+[[%define namespace "foo"
+%define api.namespace "foo"
+%%
+start: ;
+]])
+AT_BISON_CHECK([[input.y]], [1], [],
+[[input.y:2.9-21: %define variable 'api.namespace' redefined
+input.y:1.9-17: previous definition
+]])
+
 AT_DATA([[input.y]],
 [[%define foo_bar "baz"
 %%
@@ -1141,14 +1263,14 @@ m4_define([AT_CHECK_NAMESPACE_ERROR],
 AT_DATA([[input.y]],
 [[%language "C++"
 %defines
-%define namespace "]$1["
+%define api.namespace "]$1["
 %%
 start: ;
 ]])
 
 AT_BISON_CHECK([[input.y]], [1], [],
 [m4_foreach([b4_arg], m4_dquote(m4_shift($@)),
-[[input.y:3.9-17: ]b4_arg[
+[[input.y:3.9-21: ]b4_arg[
 ]])])
 ])
 
@@ -1197,10 +1319,10 @@ start: '
 AT_CHECK([[perl -e "print 'start: \'';" >> empty.y || exit 77]])
 
 AT_BISON_CHECK([empty.y], [1], [],
-[[empty.y:2.8-9: warning: empty character literal
-empty.y:3.8-4.0: warning: empty character literal
+[[empty.y:2.8-9: warning: empty character literal [-Wother]
+empty.y:3.8-4.0: warning: empty character literal [-Wother]
 empty.y:3.8-4.0: missing "'" at end of line
-empty.y:4.8: warning: empty character literal
+empty.y:4.8: warning: empty character literal [-Wother]
 empty.y:4.8: missing "'" at end of file
 ]])
 
@@ -1212,10 +1334,10 @@ start: 'ab
 AT_CHECK([[perl -e "print 'start: \'ab';" >> two.y || exit 77]])
 
 AT_BISON_CHECK([two.y], [1], [],
-[[two.y:2.8-11: warning: extra characters in character literal
-two.y:3.8-4.0: warning: extra characters in character literal
+[[two.y:2.8-11: warning: extra characters in character literal [-Wother]
+two.y:3.8-4.0: warning: extra characters in character literal [-Wother]
 two.y:3.8-4.0: missing "'" at end of line
-two.y:4.8-10: warning: extra characters in character literal
+two.y:4.8-10: warning: extra characters in character literal [-Wother]
 two.y:4.8-10: missing "'" at end of file
 ]])
 
@@ -1227,10 +1349,10 @@ start: 'abc
 AT_CHECK([[perl -e "print 'start: \'abc';" >> three.y || exit 77]])
 
 AT_BISON_CHECK([three.y], [1], [],
-[[three.y:2.8-12: warning: extra characters in character literal
-three.y:3.8-4.0: warning: extra characters in character literal
+[[three.y:2.8-12: warning: extra characters in character literal [-Wother]
+three.y:3.8-4.0: warning: extra characters in character literal [-Wother]
 three.y:3.8-4.0: missing "'" at end of line
-three.y:4.8-11: warning: extra characters in character literal
+three.y:4.8-11: warning: extra characters in character literal [-Wother]
 three.y:4.8-11: missing "'" at end of file
 ]])
 
@@ -1258,25 +1380,25 @@ AT_CHECK([[perl -e 'print "start: \"\\\t\\\f\\\0\\\1\" ;";' >> input.y \
 
 AT_BISON_CHECK([input.y], [1], [],
 [[input.y:2.9-12: invalid number after \-escape: 777
-input.y:2.8-13: warning: empty character literal
+input.y:2.8-13: warning: empty character literal [-Wother]
 input.y:2.16-17: invalid number after \-escape: 0
-input.y:2.15-18: warning: empty character literal
+input.y:2.15-18: warning: empty character literal [-Wother]
 input.y:2.21-25: invalid number after \-escape: xfff
-input.y:2.20-26: warning: empty character literal
+input.y:2.20-26: warning: empty character literal [-Wother]
 input.y:2.29-31: invalid number after \-escape: x0
-input.y:2.28-32: warning: empty character literal
+input.y:2.28-32: warning: empty character literal [-Wother]
 input.y:3.9-14: invalid number after \-escape: uffff
-input.y:3.8-15: warning: empty character literal
+input.y:3.8-15: warning: empty character literal [-Wother]
 input.y:3.18-23: invalid number after \-escape: u0000
-input.y:3.17-24: warning: empty character literal
+input.y:3.17-24: warning: empty character literal [-Wother]
 input.y:3.27-36: invalid number after \-escape: Uffffffff
-input.y:3.26-37: warning: empty character literal
+input.y:3.26-37: warning: empty character literal [-Wother]
 input.y:3.40-49: invalid number after \-escape: U00000000
-input.y:3.39-50: warning: empty character literal
+input.y:3.39-50: warning: empty character literal [-Wother]
 input.y:4.9-10: invalid character after \-escape: ' '
-input.y:4.8-11: warning: empty character literal
+input.y:4.8-11: warning: empty character literal [-Wother]
 input.y:4.14-15: invalid character after \-escape: A
-input.y:4.13-16: warning: empty character literal
+input.y:4.13-16: warning: empty character literal [-Wother]
 input.y:5.9-16: invalid character after \-escape: \t
 input.y:5.17: invalid character after \-escape: \f
 input.y:5.18: invalid character after \-escape: \0
@@ -1321,20 +1443,20 @@ foo-bar: ;
 
 # -Werror is not enabled by -Wall or equivalent.
 AT_BISON_CHECK([[-Wall input.y]], [[0]], [[]],
-[[input.y:2.1-7: warning: POSIX Yacc forbids dashes in symbol names: foo-bar
+[[input.y:2.1-7: warning: POSIX Yacc forbids dashes in symbol names: foo-bar [-Wyacc]
 ]])
 AT_BISON_CHECK([[-W input.y]], [[0]], [[]],
-[[input.y:2.1-7: warning: POSIX Yacc forbids dashes in symbol names: foo-bar
+[[input.y:2.1-7: warning: POSIX Yacc forbids dashes in symbol names: foo-bar [-Wyacc]
 ]])
 AT_BISON_CHECK([[-Wno-none input.y]], [[0]], [[]],
-[[input.y:2.1-7: warning: POSIX Yacc forbids dashes in symbol names: foo-bar
+[[input.y:2.1-7: warning: POSIX Yacc forbids dashes in symbol names: foo-bar [-Wyacc]
 ]])
 
 # -Werror is not disabled by -Wnone or equivalent.
 AT_BISON_CHECK([[-Werror,none,yacc input.y]], [[1]], [[]], [[stderr]])
 AT_CHECK([[sed 's/^.*bison:/bison:/' stderr]], [[0]],
 [[bison: warnings being treated as errors
-input.y:2.1-7: warning: POSIX Yacc forbids dashes in symbol names: foo-bar
+input.y:2.1-7: warning: POSIX Yacc forbids dashes in symbol names: foo-bar [-Wyacc]
 ]])
 [mv stderr experr]
 AT_BISON_CHECK([[-Werror,no-all,yacc input.y]], [[1]], [[]], [[experr]])
@@ -1371,6 +1493,40 @@ m4_popdef([AT_TEST])
 AT_CLEANUP
 
 
+## -------------- ##
+## Stray $ or @.  ##
+## -------------- ##
+
+AT_SETUP([[Stray $ or @]])
+
+# Give %printer and %destructor "<*> exp TOK" instead of "<*>" to
+# check that the warnings are reported once, not three times.
+
+AT_DATA_GRAMMAR([[input.y]],
+[[%type <TYPE> exp
+%token <TYPE> TOK TOK2
+%destructor     { $%; @%; } <*> exp TOK;
+%initial-action { $%; @%; };
+%printer        { $%; @%; } <*> exp TOK;
+%%
+exp: TOK        { $%; @%; $$ = $1; };
+]])
+
+AT_BISON_CHECK([[input.y]], 0, [],
+[[input.y:11.19: warning: stray '$' [-Wother]
+input.y:11.23: warning: stray '@' [-Wother]
+input.y:12.19: warning: stray '$' [-Wother]
+input.y:12.23: warning: stray '@' [-Wother]
+input.y:13.19: warning: stray '$' [-Wother]
+input.y:13.23: warning: stray '@' [-Wother]
+input.y:15.19: warning: stray '$' [-Wother]
+input.y:15.23: warning: stray '@' [-Wother]
+]])
+
+AT_CLEANUP
+
+
+
 ## ---------------- ##
 ## Code injection.  ##
 ## ---------------- ##
@@ -1387,20 +1543,34 @@ m4_pushdef([AT_TEST],
 [AT_DATA([[input.y]],
 [[%type <$1(DEAD %type)> exp
 %token <$1(DEAD %token)> a
+%token b
 %initial-action
 {
   $$;
   $<$1(DEAD %initial-action)>$
 };
+%printer
+{
+  $$
+  $<$1(DEAD %printer)>$
+} <> <*>;
+%lex-param
+{
+  $1(DEAD %lex-param)
+};
+%parse-param
+{
+  $1(DEAD %parse-param)
+};
 %%
 exp:
-  a a[last]
+  a a[name] b
   {
     $$;
     $][1;
     $<$1(DEAD action 1)>$
     $<$1(DEAD action 2)>1
-    $<$1(DEAD action 3)>last
+    $<$1(DEAD action 3)>name
     $<$1(DEAD action 4)>0
     ;
   };