+## ----------------------- ##
+## Implicitly empty rule. ##
+## ----------------------- ##
+
+AT_SETUP([Implicitly empty rule])
+
+AT_DATA_GRAMMAR([[1.y]],
+[[%%
+exp: a b;
+a: /* empty. */ {};
+// A mid-rule action does not count as an empty rule.
+b: {} {};
+]])
+
+AT_BISON_CHECK([-fcaret -Wempty-rule 1.y], [0], [],
+[[1.y:11.17-18: warning: empty rule without %empty [-Wempty-rule]
+ a: /* empty. */ {};
+ ^^
+]])
+
+AT_DATA_GRAMMAR([[2.y]],
+[[%%
+exp: a b c;
+a: /* empty. */ {};
+b: %empty {};
+c: /* empty. */ {};
+]])
+
+AT_BISON_CHECK([-fcaret 2.y], [0], [],
+[[2.y:11.17-18: warning: empty rule without %empty [-Wempty-rule]
+ a: /* empty. */ {};
+ ^^
+2.y:13.17-18: warning: empty rule without %empty [-Wempty-rule]
+ c: /* empty. */ {};
+ ^^
+]])
+
+AT_BISON_CHECK([-fcaret -Wno-empty-rule 2.y], [0])
+
+AT_CLEANUP
+
+## ------------------------ ##
+## Invalid uses of %empty. ##
+## ------------------------ ##
+
+AT_SETUP([Invalid uses of %empty])
+
+AT_DATA_GRAMMAR([[one.y]],
+[[%%
+exp:
+ %empty {} %empty
+;
+]])
+
+AT_BISON_CHECK([-fcaret one.y], [1], [],
+[[one.y:11.13-18: error: only one %empty allowed per rule
+ %empty {} %empty
+ ^^^^^^
+one.y:11.3-8: previous declaration
+ %empty {} %empty
+ ^^^^^^
+]])
+
+AT_DATA_GRAMMAR([[two.y]],
+[[%%
+exp:
+ 'a' %empty {}
+| %empty 'a' {}
+| %empty {} {}
+;
+]])
+
+AT_BISON_CHECK([-fcaret two.y], [1], [],
+[[two.y:11.7-12: error: %empty on non-empty rule
+ 'a' %empty {}
+ ^^^^^^
+two.y:12.3-8: error: %empty on non-empty rule
+ | %empty 'a' {}
+ ^^^^^^
+two.y:13.3-8: error: %empty on non-empty rule
+ | %empty {} {}
+ ^^^^^^
+]])
+
+AT_CLEANUP
+
+## ---------------------- ##
+## Valid uses of %empty. ##
+## ---------------------- ##
+
+AT_SETUP([Valid uses of %empty])
+
+AT_BISON_OPTION_PUSHDEFS
+AT_DATA_GRAMMAR([[input.y]],
+[[
+%debug
+%code
+{
+]AT_YYERROR_DECLARE[
+]AT_YYLEX_DECLARE[
+}
+%%
+exp: %empty {}
+%%
+]AT_YYERROR_DEFINE[
+]AT_YYLEX_DEFINE[
+]AT_MAIN_DEFINE[
+]])
+
+AT_FULL_COMPILE([input])
+AT_PARSER_CHECK([./input])
+AT_BISON_OPTION_POPDEFS
+AT_CLEANUP
+
+## ------------------ ##
+## Initial location. ##
+## ------------------ ##
+
+# AT_TEST(SKELETON-NAME, DIRECTIVES, [MORE-DIRECTIVES], [LOCATION = 1.1])
+# -----------------------------------------------------------------------
+# Check that the initial location is correct.
+m4_pushdef([AT_TEST],
+[AT_SETUP([Initial location: $1 $2])
+
+AT_BISON_OPTION_PUSHDEFS([%locations %skeleton "$1" $2])
+AT_DATA_GRAMMAR([[input.y]],
+[[%locations
+%debug
+%skeleton "$1"
+]$2[
+]$3[
+%code
+{
+# include <stdio.h>
+# include <stdlib.h> /* getenv */
+]AT_YYERROR_DECLARE[
+]AT_YYLEX_DECLARE[
+}
+%%
+exp: { ]AT_SKEL_CC_IF([[std::cerr << @$ << std::endl]],
+ [[LOCATION_PRINT(stderr, @$); fputc ('\n', stderr)]])[; }
+%%
+]AT_YYERROR_DEFINE[
+
+]AT_YYLEX_PROTOTYPE[
+{]AT_PURE_IF([
+ YYUSE(lvalp);
+ YYUSE(llocp);], [AT_SKEL_CC_IF([
+ YYUSE(lvalp);
+ YYUSE(llocp);])])[
+ return 'x';
+}
+
+int
+main (void)
+{]AT_SKEL_CC_IF([[
+ yy::parser p;
+ p.set_debug_level (!!getenv("YYDEBUG"));
+ return p.parse ();]], [[
+ yydebug = !!getenv("YYDEBUG");
+ return !!yyparse (]AT_PARAM_IF([0])[);]])[
+}
+]])
+
+AT_FULL_COMPILE([input])
+AT_PARSER_CHECK([./input], 1, [],
+[m4_default([$4], [1.1])
+m4_default([$4], [1.1])[: syntax error
+]])
+AT_BISON_OPTION_POPDEFS
+AT_CLEANUP
+])
+
+## FIXME: test Java, and iterate over skeletons.
+AT_TEST([yacc.c])
+AT_TEST([yacc.c], [%define api.pure full])
+AT_TEST([yacc.c], [%define api.pure %parse-param { int x }])
+AT_TEST([yacc.c], [%define api.push-pull both])
+AT_TEST([yacc.c], [%define api.push-pull both %define api.pure full])
+AT_TEST([glr.c])
+AT_TEST([glr.c], [%define api.pure])
+AT_TEST([lalr1.cc])
+AT_TEST([glr.cc])
+
+## A very different test, based on PostgreSQL's implementation of the
+## locations. See
+## http://lists.gnu.org/archive/html/bug-bison/2012-11/msg00023.html
+##
+## Weirdly enough, to trigger the warning with GCC 4.7, we must not
+## use fprintf, so run the test twice: once to check the warning
+## (absence thereof), and another time to check the value.
+AT_TEST([yacc.c], [%define api.pure full],
+[[%{
+# define YYLTYPE int
+# define LOCATION_PRINT(Stream, Loc) \
+ (void) (Loc)
+# define YYLLOC_DEFAULT(Current, Rhs, N) \
+ (Current) = ((Rhs)[N ? 1 : 0])
+%}
+]],
+[@&t@])
+
+AT_TEST([yacc.c], [%define api.pure full],
+[[%{
+# define YYLTYPE int
+# define LOCATION_PRINT(Stream, Loc) \
+ fprintf ((Stream), "%d", (Loc))
+# define YYLLOC_DEFAULT(Current, Rhs, N) \
+ (Current) = ((Rhs)[N ? 1 : 0])
+%}
+]],
+[0])
+
+
+m4_popdef([AT_TEST])
+
+
+
+## ---------------- ##
+## Location Print. ##
+## ---------------- ##
+
+# AT_TEST(SKELETON-NAME, DIRECTIVES, [MORE-DIRECTIVES])
+# -----------------------------------------------------
+# Check that the initial location is correct.
+m4_pushdef([AT_TEST],
+[AT_SETUP([Location print: $1 $2])
+
+AT_BISON_OPTION_PUSHDEFS([%locations %skeleton "$1" $2])
+AT_DATA_GRAMMAR([[input.y]],
+[[%locations
+%debug
+%skeleton "$1"
+]$2[
+]$3[
+%code
+{
+]AT_YYERROR_DECLARE[
+]AT_YYLEX_DECLARE[
+}
+%%
+exp: %empty;
+%%
+]AT_YYERROR_DEFINE[
+]AT_YYLEX_DEFINE[
+
+int
+main (void)
+{
+ ]AT_YYLTYPE[ loc;
+]AT_GLR_CC_IF([loc.initialize();])[
+#define TEST(L1, C1, L2, C2) \
+ loc.]AT_FIRST_LINE[ = L1; \
+ loc.]AT_FIRST_COLUMN[ = C1; \
+ loc.]AT_LAST_LINE[ = L2; \
+ loc.]AT_LAST_COLUMN[ = C2; \
+ ]AT_SKEL_CC_IF([std::cout << loc],
+ [LOCATION_PRINT(stdout, loc)])[;\
+ putchar ('\n');
+
+ TEST(1, 1, 1, 1);
+ TEST(2, 1, 2, 10);
+ TEST(3, 1, 4, 1);
+ TEST(5, 1, 6, 10);
+
+ TEST(7, 2, 0, 2);
+ TEST(8, 0, 8, 0);
+ return 0;
+}
+]])
+
+AT_FULL_COMPILE([input])
+AT_PARSER_CHECK([./input], 0,
+[[1.1
+2.1-9
+3.1-4.0
+5.1-6.9
+7.2
+8.0
+]])
+AT_BISON_OPTION_POPDEFS
+AT_CLEANUP
+])
+
+## FIXME: test Java, and iterate over skeletons.
+AT_TEST([yacc.c])
+AT_TEST([glr.c])
+AT_TEST([lalr1.cc])
+AT_TEST([glr.cc])
projects / bison.git / blobdiff