@first-char ( i number-parse n char -- n/f )

Vocabulary

math.parser.private

Inputs

i	an object
number-parse	an object
n	an object
char	an object

Outputs

n/f

an object

Definition

USING: combinators ;

IN: math.parser.private

: @first-char ( i number-parse n char -- n/f )
    {
        { 45 [ [ @neg-first-digit ] require-next-digit ?neg ] }
        { 43 [ [ @pos-first-digit ] require-next-digit ?pos ] }
        [ @pos-first-digit ?pos ]
    } case ; inline