3.9 ASCII

> (definezero(ascii false false false false false false false ))
> (defineone(ascii false false false false false false true ))
> ""

(nil (Ascii))
> "1"

(cons (Ascii)(ascii (false)(true)(true)(false)(false)(false)(true))(nil (Ascii)))

type
Ascii-Str :Type

The type of ASCII string; equivalent to (List Ascii ).

type
empty-ascii-str :Ascii-Str

The empty string; equivalent to (nil Ascii ) and "".

procedure
( ascii-str-concat str1str2)→Ascii-Str
str1:Ascii-Str
str2:Ascii-Str

Concatenates two strings, appending str2 to the end of str1.

procedure
( ascii-str-length str)→Nat
str:Ascii-Str

Returns the length of the string str.

procedure
( meta-ascii->asciisynchar)→syntax?
syn:(or/c syntax? #f)
char:ascii-char?

A meta-procedure, provided at phase 1, for converting a Racket (meta-level) ascii-char? into syntax representing an Ascii . If syn is provided, it is used in error messages in the even that char is not an ascii-char? .

procedure
( meta-string->ascii-strsynstr)→syntax?
syn:(or/c syntax? #f)
str:ascii-string?

A meta-procedure, provided at phase 1, for converting a Racket (meta-level) ascii-string? into syntax representing an Ascii-Str . If syn is provided, it is used in error messages in the even that str is not an ascii-string? .

procedure
( ascii-datumsynf)→syntax?
syn:syntax?
f:procedure?

A meta-procedure, provided at phase 1, for parsing ASCII string literals. This module automatically updates #%datum using this procedure.

Examples:

> ""

(nil (Ascii))
> "1"

(cons (Ascii)(ascii (false)(true)(true)(false)(false)(false)(true))(nil (Ascii)))

procedure
( ascii->meta-asciisyn)→ascii-char?
syn:syntax?

A meta-procedure, provided at phase 1, for converting syntax representing a Ascii literal into a Racket (meta-level) ascii-char? .

procedure
( ascii-str->meta-stringsyn)→ascii-string?
syn:syntax?

A meta-procedure, provided at phase 1, for converting syntax representing a Ascii-Str literal into a Racket (meta-level) ascii-string? .

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