collation-key/nfd ( string -- key nfd )
Collation and weak comparison

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Vocabulary
unicode

Inputs

string

a string

Outputs

key	a byte-array
nfd	an object

Word description
This takes a string and gives a representation of the collation key, which can be compared with <=>. The representation is according to the DUCET.

Definition

USING: kernel unicode.collation unicode.collation.private ;

IN: unicode

: collation-key/nfd ( string -- key nfd )
    nfd [
        string>graphemes graphemes>weights filter-ignorable
        weights>bytes
    ] keep ;