Method: U::String#to_i

Defined in:
ext/u/rb_u_string_to_i.c

#to_i(base = 16) ⇒ Integer

Returns the Integer value that results from treating the receiver as a string of digits in BASE.

The conversion algorithm is

  1. Skip any leading #space?s

  2. Check for an optional sign, ‘+’ or ‘-’

  3. If base is 2, skip an optional “0b” or “0B” prefix

  4. If base is 8, skip an optional “0o” or “0o” prefix

  5. If base is 10, skip an optional “0d” or “0D” prefix

  6. If base is 16, skip an optional “0x” or “0X” prefix

  7. Skip any ‘0’s

  8. Read an as long sequence of digits in BASE separated by optional U+005F

LOW LINE characters, using letters in the following ranges of characters
for digits or the characters digit value, if any

 * U+0041 LATIN CAPITAL LETTER A through U+005A LATIN CAPITAL LETTER Z
 * U+0061 LATIN SMALL LETTER A through U+007A LATIN SMALL LETTER Z
 * U+FF21 FULLWIDTH LATIN CAPITAL LETTER A through U+FF3A FULLWIDTH LATIN CAPITAL LETTER Z
 * U+FF41 FULLWIDTH LATIN SMALL LETTER A through U+FF5A FULLWIDTH LATIN SMALL LETTER Z

Note that only one separator is allowed in a row.

Parameters:

  • base (#to_int) (defaults to: 16)

Returns:

  • (Integer)

Raises:

  • (ArgumentError) —

    Unless 2 ≤ BASE ≤ 36



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# File 'ext/u/rb_u_string_to_i.c', line 32

VALUE
rb_u_string_to_i(int argc, VALUE *argv, VALUE self)
{
        int base = 10;

        VALUE rbbase;
        if (rb_scan_args(argc, argv, "01", &rbbase) == 1)
                base = NUM2INT(rbbase);

        if (base < 0)
                rb_u_raise(rb_eArgError, "illegal radix %d", base);

        return rb_u_string_to_inum(self, base, false);
}