Method: Regexp#casefold?

Defined in:
re.c

#casefold? ⇒ Boolean

Returns true if the case-insensitivity flag in self is set, false otherwise:

/a/.casefold?           # => false
/a/i.casefold?          # => true
/(?i:a)/.casefold?      # => false

Returns:

  • (Boolean) 


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# File 're.c', line 744

static VALUE
rb_reg_casefold_p(VALUE re)
{
    rb_reg_check(re);
    return RBOOL(RREGEXP_PTR(re)->options & ONIG_OPTION_IGNORECASE);
}