parse-datum ( string -- word/number )

Vocabulary

parser

Inputs

string

a string

Outputs

word/number

a word or a number

Word description

If string is a valid number literal, it is converted to a number, otherwise the current vocabulary search path is searched for a word named by the string.

Errors

Throws an error if the token does not name a word, and does not parse as a number.

Notes

This word is used to implement ?scan-datum and scan-datum.

Definition

USING: kernel math.parser vocabs.parser ;

IN: parser

: parse-datum ( string -- word/number )
    [ search ] [ [ string>number ] [ no-word ] ?unless ] ?unless
    ;