X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/fb9712a96207a21a6c442bbee9c20324c40e6727..b09a18c50d221b54e6bc94e03deb65ecd52c4288:/src/parse-gram.y diff --git a/src/parse-gram.y b/src/parse-gram.y index 19d8cb93..d4f2731e 100644 --- a/src/parse-gram.y +++ b/src/parse-gram.y @@ -20,6 +20,7 @@ 02110-1301 USA */ +#include <config.h> #include "system.h" #include "complain.h" @@ -32,6 +33,7 @@ #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 +41,8 @@ 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 @@ -50,9 +54,8 @@ static void add_param (char const *, char *, location); static symbol_class current_class = unknown_sym; static uniqstr current_type = 0; -symbol *current_lhs; -location current_lhs_location; -assoc current_assoc; +static symbol *current_lhs; +static location current_lhs_location; static int current_prec = 0; %} @@ -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 +535,17 @@ 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); + exit (63); + } +} + static void gram_error (location const *loc, char const *msg) {