Method: StringScanner#pre_match

Defined in:
strscan.c

#pre_match ⇒ Object

Return the pre-match (in the regular expression sense) of the last scan.

s = StringScanner.new('test string')
s.scan(/\w+/)           # -> "test"
s.scan(/\s+/)           # -> " "
s.pre_match             # -> "test"
s.post_match            # -> "string"



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# File 'strscan.c', line 974

static VALUE
strscan_pre_match(VALUE self)
{
    struct strscanner *p;

    GET_SCANNER(self, p);
    if (! MATCHED_P(p)) return Qnil;

    return extract_range(p, 0, p->prev + p->regs.beg[0]);
}