Feature #8343 ยป 0001-make-StringScanner-accept-names-of-named-captures.patch
| ext/strscan/strscan.c | ||
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/* the regexp register; legal only when MATCHED_P(s) */
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struct re_registers regs;
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/* regexp used for last scan */
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VALUE regex;
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};
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#define MATCHED_P(s) ((s)->flags & FLAG_MATCHED)
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| ... | ... | |
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if (S_RESTLEN(p) < 0) {
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return Qnil;
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}
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p->regex = regex;
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re = rb_reg_prepare_re(regex, p->str);
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tmpreg = re != RREGEXP(regex)->ptr;
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if (!tmpreg) RREGEXP(regex)->usecnt++;
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| ... | ... | |
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* Return the n-th subgroup in the most recent match.
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*
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* s = StringScanner.new("Fri Dec 12 1975 14:39")
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* s.scan(/(\w+) (\w+) (\d+) /) # -> "Fri Dec 12 "
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* s.scan(/(?<wday>\w+) (?<month>\w+) (?<day>\d+) /) # -> "Fri Dec 12 "
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* s[0] # -> "Fri Dec 12 "
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* s[1] # -> "Fri"
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* s[2] # -> "Dec"
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* s[3] # -> "12"
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* s[:wday] # -> "Fri"
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* s[:month] # -> "Dec"
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* s[:day] # -> "12"
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* s.post_match # -> "1975 14:39"
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* s.pre_match # -> ""
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*/
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static VALUE
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strscan_aref(VALUE self, VALUE idx)
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{
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const char *name, *name_end;
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struct strscanner *p;
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long i;
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GET_SCANNER(self, p);
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if (! MATCHED_P(p)) return Qnil;
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i = NUM2LONG(idx);
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switch (TYPE(idx)) {
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case T_SYMBOL:
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name = rb_id2name(SYM2ID(idx));
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goto name_to_backref;
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break;
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case T_STRING:
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name = StringValuePtr(idx);
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name_to_backref:
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name_end = name + strlen(name);
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i = onig_name_to_backref_number(RREGEXP(p->regex)->ptr,
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(const unsigned char* )name, (const unsigned char* )name_end, &(p->regs));
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break;
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default:
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i = NUM2LONG(idx);
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}
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if (i < 0)
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i += p->regs.num_regs;
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if (i < 0) return Qnil;
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| test/strscan/test_stringscanner.rb | ||
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assert_equal true, s[2].tainted?
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assert_equal true, s[3].tainted?
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assert_equal true, s[4].tainted?
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s = StringScanner.new("foo bar")
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s.scan /(?<a>(\w+)) (?<b>(\w+))/
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assert_equal 'foo', s[1]
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assert_equal 'bar', s[2]
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assert_equal 'foo', s[:a]
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assert_equal 'bar', s[:b]
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assert_equal nil, s[:c]
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assert_equal 'foo', s['a']
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assert_equal 'bar', s['b']
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assert_equal nil, s['c']
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end
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def test_pre_match
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