roman> ( str -- n )
Roman numerals

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Vocabulary
roman

Inputs

str

a string

Outputs

n	an integer

Word description
Converts a Roman numeral to an integer.

Notes
The range for this word is i-mmmcmxcix, inclusive.

Examples

USING: prettyprint roman ; "lvi" roman> .
56

See also
>roman, >ROMAN

Definition

USING: roman.private sequences splitting.monotonic unicode ;

IN: roman

: roman> ( str -- n )
    >lower [ roman-digit>= ] monotonic-split
    [ roman-value ] map-sum ;