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* bootstrap (gnulib_modules): Add strverscmp.

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* lib/.cvsignore: Add strverscmp.c, strverscmp.h.
* m4/.cvsignore: Add strverscmp.m4.
* src/parse-gram.y (%require): New token, new rule.
(version_check): New.
* src/scan-gram.l (%require): Adjust.
* tests/input.at (AT_REQUIRE): New.
Use it.
* doc/bison.texinfo (Require Decl): New.
(Calc++ Parser): Use %require.
This commit is contained in:
Akim Demaille
2005-10-02 18:49:15 +00:00
parent 21667f64cd
commit b50d2359d7
11 changed files with 491 additions and 380 deletions
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13
src/parse-gram.y
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@@ -32,6 +32,7 @@
#include "quotearg.h"
#include "reader.h"
#include "symlist.h"
#include "strverscmp.h"
#define YYLLOC_DEFAULT(Current, Rhs, N) (Current) = lloc_default (Rhs, N)
static YYLTYPE lloc_default (YYLTYPE const *, int);
@@ -39,6 +40,8 @@ static YYLTYPE lloc_default (YYLTYPE const *, int);
#define YY_LOCATION_PRINT(File, Loc) \
location_print (File, Loc)
static void version_check (location const *loc, char const *version);
/* Request detailed syntax error messages, and pass them to GRAM_ERROR.
FIXME: depends on the undocumented availability of YYLLOC. */
#undef yyerror
@@ -133,6 +136,7 @@ static int current_prec = 0;
PERCENT_OUTPUT "%output"
PERCENT_PARSE_PARAM "%parse-param {...}"
PERCENT_PURE_PARSER "%pure-parser"
PERCENT_REQUIRE "%require"
PERCENT_SKELETON "%skeleton"
PERCENT_START "%start"
PERCENT_TOKEN_TABLE "%token-table"
@@ -226,6 +230,7 @@ declaration:
| "%output" "=" string_content { spec_outfile = $3; }
| "%parse-param {...}" { add_param ("parse_param", $1, @1); }
| "%pure-parser" { pure_parser = true; }
| "%require" string_content { version_check (&@2, $2); }
| "%skeleton" string_content { skeleton = $2; }
| "%token-table" { token_table_flag = true; }
| "%verbose" { report_flag = report_states; }
@@ -530,6 +535,14 @@ add_param (char const *type, char *decl, location loc)
scanner_last_string_free ();
}
static void
version_check (location const *loc, char const *version)
{
if (strverscmp (version, PACKAGE_VERSION) > 0)
complain_at (*loc, "require bison %s, but have %s",
version, PACKAGE_VERSION);
}
static void
gram_error (location const *loc, char const *msg)
{