diff options
Diffstat (limited to 'parse.y')
| -rw-r--r-- | parse.y | 27 |
1 files changed, 22 insertions, 5 deletions
@@ -694,9 +694,7 @@ new_args_tail_gen(struct parser_params *parser, VALUE k, VALUE kr, VALUE b) # define rb_warningV(fmt,a) ripper_warningV(parser, (fmt), (a)) static void ripper_warn0(struct parser_params*, const char*); static void ripper_warnI(struct parser_params*, const char*, int); -#if 0 /* not in use right now */ static void ripper_warnS(struct parser_params*, const char*, const char*); -#endif static void ripper_warnV(struct parser_params*, const char*, VALUE); static void ripper_warning0(struct parser_params*, const char*); static void ripper_warningS(struct parser_params*, const char*, const char*); @@ -7593,6 +7591,27 @@ tokenize_ident(struct parser_params *parser, const enum lex_state_e last_state) } static int +parse_numvar(struct parser_params *parser) +{ + size_t len; + int overflow; + unsigned long n = ruby_scan_digits(tok()+1, toklen()-1, 10, &len, &overflow); + const unsigned long nth_ref_max = + (FIXNUM_MAX / 2 < INT_MAX) ? FIXNUM_MAX / 2 : INT_MAX; + /* NTH_REF is left-shifted to be ORed with back-ref flag and + * turned into a Fixnum, in compile.c */ + + if (overflow || n > nth_ref_max) { + /* compile_error()? */ + rb_warnS("`%s' is too big for a number variable, always nil", tok()); + return 0; /* $0 is $PROGRAM_NAME, not NTH_REF */ + } + else { + return (int)n; + } +} + +static int parse_gvar(struct parser_params *parser, const enum lex_state_e last_state) { register int c; @@ -7670,7 +7689,7 @@ parse_gvar(struct parser_params *parser, const enum lex_state_e last_state) pushback(c); if (IS_lex_state_for(last_state, EXPR_FNAME)) goto gvar; tokfix(); - set_yylval_node(NEW_NTH_REF(atoi(tok()+1))); + set_yylval_node(NEW_NTH_REF(parse_numvar(parser))); return tNTH_REF; default: @@ -11070,14 +11089,12 @@ ripper_warnI(struct parser_params *parser, const char *fmt, int a) STR_NEW2(fmt), INT2NUM(a)); } -#if 0 /* not in use right now */ static void ripper_warnS(struct parser_params *parser, const char *fmt, const char *str) { rb_funcall(parser->value, id_warn, 2, STR_NEW2(fmt), STR_NEW2(str)); } -#endif static void ripper_warnV(struct parser_params *parser, const char *fmt, VALUE v) |