# Checking the C++ Features. -*- Autotest -*-
-# Copyright (C) 2004-2005, 2007, 2009-2012 Free Software Foundation,
-# Inc.
+# Copyright (C) 2004-2005, 2007-2012 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
AT_BANNER([[C++ Features.]])
+## ---------- ##
+## Variants. ##
+## ---------- ##
+
+# AT_TEST([DIRECTIVES])
+# ---------------------
+# Check the support of variants in C++, with the additional DIRECTIVES.
+m4_pushdef([AT_TEST],
+[AT_SETUP([Variants $1])
+
+AT_BISON_OPTION_PUSHDEFS([%skeleton "lalr1.cc" $1])
+# Store strings and integers in a list of strings.
+AT_DATA_GRAMMAR([list.yy],
+[[%debug
+%skeleton "lalr1.cc"
+%defines
+%define variant
+%locations
+]m4_bpatsubst([$1], [\\n], [
+])[
+
+%code requires // code for the .hh file
+{
+#include <list>
+#include <string>
+typedef std::list<std::string> strings_type;
+}
+
+%code // code for the .cc file
+{
+#include <iostream>
+#include <sstream>
+
+ namespace yy
+ {
+ static]AT_TOKEN_CTOR_IF([[
+ parser::symbol_type yylex ()]], [[
+ parser::token_type yylex (parser::semantic_type* yylval,
+ parser::location_type* yylloc)]])[;
+ }
+
+ // Printing a list of strings (for %printer).
+ // Koening look up will look into std, since that's an std::list.
+ namespace std
+ {
+ std::ostream&
+ operator<<(std::ostream& o, const strings_type& s)
+ {
+ o << '(';
+ for (strings_type::const_iterator i = s.begin (); i != s.end (); ++i)
+ {
+ if (i != s.begin ())
+ o << ", ";
+ o << *i;
+ }
+ return o << ')';
+ }
+ }
+
+ // Conversion to string.
+ template <typename T>
+ inline
+ std::string
+ string_cast (const T& t)
+ {
+ std::ostringstream o;
+ o << t;
+ return o.str ();
+ }
+}
+
+%token <::std::string> TEXT;
+%token <int> NUMBER;
+%token END_OF_FILE 0;
+
+%type <::std::string> item;
+// Using the template type to exercize its parsing.
+// Starting with :: to ensure we don't output "<::" which starts by the
+// digraph for the left square bracket.
+%type <::std::list<std::string>> list result;
+
+%printer { yyo << $][$; }
+ <int> <::std::string> <::std::list<std::string>>;
+%%
+
+result:
+ list { std::cout << $][1 << std::endl; }
+;
+
+list:
+ /* nothing */ { /* Generates an empty string list */ }
+| list item { std::swap ($][$,$][1); $$.push_back ($][2); }
+| list error { std::swap ($][$,$][1); }
+;
+
+item:
+ TEXT { std::swap ($][$,$][1); }
+| NUMBER { if ($][1 == 3) YYERROR; else $][$ = string_cast ($][1); }
+;
+%%
+
+#ifdef TWO_STAGE_BUILD
+# define BUILD(Type, Value) build<Type> () = Value
+#else
+# define BUILD(Type, Value) build (Value)
+#endif
+
+#define STAGE_MAX 5
+namespace yy
+{
+ static]AT_TOKEN_CTOR_IF([[
+ parser::symbol_type yylex ()]], [[
+ parser::token_type yylex (parser::semantic_type* yylval,
+ parser::location_type* yylloc)]])[
+ {
+ typedef parser::location_type location;
+ static int stage = -1;
+ ++stage;
+ if (stage == STAGE_MAX)
+ {]AT_TOKEN_CTOR_IF([[
+ return parser::make_END_OF_FILE (location ());]], [[
+ *yylloc = location ();
+ return parser::token::END_OF_FILE;]])[
+ }
+ else if (stage % 2)
+ {]AT_TOKEN_CTOR_IF([[
+ return parser::make_NUMBER (stage, location ());]], [[
+ yylval->BUILD (int, stage);
+ *yylloc = location ();
+ return parser::token::NUMBER;]])[
+ }
+ else
+ {]AT_TOKEN_CTOR_IF([[
+ return parser::make_TEXT (string_cast (stage), location ());]], [[
+ yylval->BUILD (std::string, string_cast (stage));
+ *yylloc = location ();
+ return parser::token::TEXT;]])[
+ }
+ abort ();
+ }
+
+ void
+ parser::error (const parser::location_type&, const std::string& message)
+ {
+ std::cerr << message << std::endl;
+ }
+}
+
+int
+main ()
+{
+ yy::parser p;
+ p.set_debug_level (!!getenv ("YYDEBUG"));
+ return p.parse ();
+}
+]])
+
+AT_BISON_CHECK([-o list.cc list.yy])
+AT_COMPILE_CXX([list])
+AT_CHECK([./list], 0,
+ [(0, 1, 2, 4)
+])
+
+AT_BISON_OPTION_POPDEFS
+AT_CLEANUP
+])
+
+AT_TEST([])
+AT_TEST([%define parse.assert])
+AT_TEST([[%define parse.assert %code {\n#define TWO_STAGE_BUILD\n}]])
+AT_TEST([[%define parse.assert %define api.token.constructor]])
+AT_TEST([[%define parse.assert %define api.token.constructor %define api.token.prefix "TOK_"]])
+
+m4_popdef([AT_TEST])
+
+
## ----------------------- ##
## Doxygen Documentation. ##
## ----------------------- ##
[m4_case([$1],
[Public], [m4_pushdef([AT_DOXYGEN_PRIVATE], [NO])],
[Private], [m4_pushdef([AT_DOXYGEN_PRIVATE], [YES])],
- [m4_fatal([invalid argument: $1])])
+ [m4_fatal([invalid argument: $1])])
AT_SETUP([Doxygen $1 Documentation])
AT_BISON_OPTION_PUSHDEFS([%skeleton "lalr1.cc"])
AT_CHECK_DOXYGEN([Public])
AT_CHECK_DOXYGEN([Private])
+
## ------------ ##
## Namespaces. ##
## ------------ ##
AT_DATA_GRAMMAR([[input.y]],
[[%language "C++"
%defines
-%define namespace "]$1["
+%define api.namespace "]$1["
%union { int i; }
%define global_tokens_and_yystype
+%locations
%code {
// YYSTYPE contains a namespace reference.
- int yylex (YYSTYPE *lval) {
+ int yylex (YYSTYPE *lval, const ]$1[::parser::location_type*) {
lval->i = 3;
return 0;
}
}
int
-main (void)
+main ()
{
]$1[::parser p;
return p.parse ();
# contains single occurrences of `:'.
AT_CHECK_NAMESPACE([[foo[3]::bar::baz]], [[-]])
AT_CHECK_NAMESPACE([[foo::bar,baz]], [[-]])
-AT_CHECK_NAMESPACE([[foo::bar::(baz]], [[-]])
+AT_CHECK_NAMESPACE([[foo::bar::(baz /* Pacify Emacs ) */]], [[-]])
+AT_CLEANUP
+
+
+## -------------------------------------- ##
+## Syntax error discarding no lookahead. ##
+## -------------------------------------- ##
+
+# After a syntax error, lalr1.cc used to not check whether there
+# actually is a lookahead before discarding the lookahead. As a result,
+# it mistakenly invoked the destructor for the previous lookahead.
+
+AT_SETUP([[Syntax error discarding no lookahead]])
+
+AT_DATA_GRAMMAR([[input.yy]],
+[[%skeleton "lalr1.cc"
+
+%code {
+ #include <string>
+ int yylex (yy::parser::semantic_type *);
+ #define USE(Args)
+}
+
+%defines
+%define parse.error verbose
+
+%nonassoc 'a' ;
+
+%destructor {
+ std::cerr << "Discarding 'a'." << std::endl;
+} 'a'
+
+%%
+
+start: error-reduce consistent-error 'a' { USE ($3); };
+
+error-reduce:
+ 'a' 'a' consistent-error 'a' { USE (($1, $2, $4)); }
+| 'a' error { std::cerr << "Reducing 'a'." << std::endl; USE ($1); }
+;
+
+consistent-error:
+ 'a'
+| /*empty*/ %prec 'a'
+;
+
+// Provide another context in which all rules are useful so that this
+// test case looks a little more realistic.
+start: 'b' consistent-error ;
+
+%%
+
+int
+yylex (yy::parser::semantic_type *)
+{
+ static char const *input = "aa";
+ return *input++;
+}
+
+void
+yy::parser::error (const std::string &m)
+{
+ std::cerr << m << std::endl;
+}
+
+int
+main ()
+{
+ yy::parser parser;
+ return parser.parse ();
+}
+]])
+AT_BISON_CHECK([[-o input.cc input.yy]])
+AT_COMPILE_CXX([[input]])
+# This used to print "Discarding 'a'." again at the end.
+AT_PARSER_CHECK([[./input]], [[1]], [[]],
+[[syntax error
+Discarding 'a'.
+Reducing 'a'.
+]])
+
+AT_CLEANUP
+
+
+## --------------------------- ##
+## Syntax error as exception. ##
+## --------------------------- ##
+
+AT_SETUP([[Syntax error as exception]])
+
+AT_DATA_GRAMMAR([[input.yy]],
+[[%skeleton "lalr1.cc"
+
+%code
+{
+ #include <cstdlib>
+ int yylex (yy::parser::semantic_type *);
+}
+
+%defines
+%define variant
+%define parse.error verbose
+%define parse.trace
+%%
+
+start:
+ thing
+| start thing
+;
+
+thing:
+ error { std::cerr << "caught error" << std::endl; }
+| item
+;
+
+item:
+ 'a'
+| 's'
+ {
+ throw yy::parser::syntax_error ("invalid expression");
+ }
+
+%%
+
+int
+yylex (yy::parser::semantic_type *)
+{
+ // 's': syntax error, 'l': lexical error.
+ static char const *input = "asal";
+ switch (int res = *input++)
+ {
+ case 'l':
+ throw yy::parser::syntax_error ("invalid character");
+ default:
+ return res;
+ }
+}
+
+void
+yy::parser::error (const std::string &m)
+{
+ std::cerr << "error: " << m << std::endl;
+}
+
+int
+main ()
+{
+ yy::parser parser;
+ parser.set_debug_level (!!getenv ("YYDEBUG"));
+ return parser.parse ();
+}
+]])
+AT_BISON_CHECK([[-o input.cc input.yy]])
+AT_COMPILE_CXX([[input]])
+
+AT_PARSER_CHECK([[./input]], [[0]], [[]],
+[[error: invalid expression
+caught error
+error: invalid character
+caught error
+]])
+
AT_CLEANUP
item:
'a' { $$ = $1; }
-| 'e' { YYUSE ($$); YYUSE($1); error (location_type(), "syntax error"); }
+| 'e' { YYUSE ($$); YYUSE($1); error ("syntax error"); }
// Not just 'E', otherwise we reduce when 'E' is the lookahead, and
// then the stack is emptied, defeating the point of the test.
| 'E' 'a' { YYUSE($1); $$ = $2; }
/* A C++ error reporting function. */
void
-yy::parser::error (const location_type& l, const std::string& m)
+yy::parser::error (const std::string& m)
{
- YYUSE (l);
throw std::runtime_error (m);
}
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