doc: fixes in the C++ part

[bison.git] / tests / types.at

diff --git a/tests/types.at b/tests/types.at
index 6275903c256de833a7701b6d252603830befee35..0c108d9de8d3f96ae6a6dfd0907698998f5009c0 100644 (file)
--- a/tests/types.at
+++ b/tests/types.at
@@ -1,6 +1,6 @@
 # Value type.                                     -*- Autotest -*-
 
-# Copyright (C) 2013 Free Software Foundation, Inc.
+# Copyright (C) 2013-2015 Free Software Foundation, Inc.
 
 # 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
@@ -61,15 +61,16 @@ AT_CLEANUP
 ## api.value.type.  ##
 ## ---------------- ##
 
-# AT_TEST($1: BISON-DIRECTIVES,
-#         $2: MORE-BISON-DIRECTIVES,
-#         $3: PARSER-ACTION,
-#         $4: INPUT, $5: SCANNER-ACTION,
-#         $6: RESULT)
+# _AT_TEST($1: BISON-DIRECTIVES,
+#          $2: MORE-BISON-DIRECTIVES,
+#          $3: PARSER-ACTION,
+#          $4: INPUT,
+#          $5: SCANNER-ACTION,
+#          $6: RESULT)
 # --------------------------------------
 # Compile the grammar and check the expected result.
 # BISON-DIRECTIVES are passed to AT_SETUP, contrary to MORE-BISON-DIRECTIVES.
-m4_pushdef([AT_TEST],
+m4_pushdef([_AT_TEST],
 [
 AT_SETUP([$1])
 AT_KEYWORDS([api.value.type])
@@ -105,6 +106,25 @@ AT_BISON_OPTION_POPDEFS
 AT_CLEANUP
 ])
 
+# AT_TEST($1: BISON-DIRECTIVES,
+#         $2: MORE-BISON-DIRECTIVES,
+#         $3: PARSER-ACTION,
+#         $4: INPUT,
+#         $5: SCANNER-ACTION,
+#         $6: RESULT)
+# --------------------------------------
+# Check with and without %defines, to avoid regressions.  It turns out
+# that in that case yacc.c calls the set-up of the %union twice,
+# because YYSTYPE is defined once in the header, and once in the
+# implementation file (eventually it'd be better to include the header
+# file, but that's another story).  Unfortunately running these macros
+# a second time doubled the side-effects and resulted in a double
+# definition of the union members.
+m4_pushdef([AT_TEST],
+[_AT_TEST([$1],          [$2], [$3], [$4], [$5], [$6])
+ _AT_TEST([$1 %defines], [$2], [$3], [$4], [$5], [$6])
+])
+
 m4_foreach([b4_skel], [[yacc.c], [glr.c], [lalr1.cc], [glr.cc]],
  [# A built-in type.
   AT_TEST([%skeleton "]b4_skel["
@@ -177,18 +197,23 @@ m4_foreach([b4_skel], [[yacc.c], [glr.c], [lalr1.cc], [glr.cc]],
              AT_VAL.fval = .2f],
           [10 0.2])
 
-  # A %union.
-  AT_TEST([%skeleton "]b4_skel["
-           %union { float fval; int ival; };],
-          [%token <ival> '1';
-           %token <fval> '2';],
-          ['1' '2' { printf ("%d %2.1f\n", $1, $2); }],
-          ["12"],
-          [if (res == '1')
-             AT_VAL.ival = 10;
-           else
-             AT_VAL.fval = 0.2f],
-          [10 0.2])
+  # A %union and a named %union.  In C++ named %union is an error.
+  m4_foreach([b4_union],
+             [m4_bmatch(b4_skel, [\.cc$],
+                       [[%union]],
+                        [[%union], [%union foo],
+                         [%define api.value.union.name foo; %union]])],
+   [AT_TEST([%skeleton "]b4_skel["
+             ]b4_union[ { float fval; int ival; };],
+            [%token <ival> '1';
+             %token <fval> '2';],
+            ['1' '2' { printf ("%d %2.1f\n", $1, $2); }],
+            ["12"],
+            [if (res == '1')
+               AT_VAL.ival = 10;
+             else
+               AT_VAL.fval = 0.2f],
+            [10 0.2])])
 
   # A Bison-defined union.
   # The tokens names are not available directly in C++, we use their
@@ -228,3 +253,23 @@ m4_foreach([b4_skel], [[yacc.c], [glr.c], [lalr1.cc], [glr.cc]],
 ])
 
 m4_popdef([AT_TEST])
+m4_popdef([_AT_TEST])
+
+
+## ------------------- ##
+## C++: Named %union.  ##
+## ------------------- ##
+
+m4_foreach([b4_skel], [[lalr1.cc], [glr.cc]],
+[AT_SETUP([b4_skel: Named %union])
+AT_DATA([input.y],
+[%skeleton "]b4_skel["
+%union foo { float fval; int ival; };
+%%
+exp: %empty;
+])
+AT_BISON_CHECK([input.y], 1, [],
+[[input.y:2.8-10: error: named %union is invalid in C++
+]])
+AT_CLEANUP
+])