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formatted-string's Introduction

formatted-string

Racket Test

The language extends racket string to formatted string, let's look at the following example.

#lang formatted-string racket/base

(define-values (x y z) (values 1 2 3))
"x = $x, y = $y, z = $z, (+ x y z) = $(+ x y z)"

To escape from this, write "\$" to get "$"!

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formatted-string's Issues

escape `$`

If we write

"x = $(add 1)"

we get "x = 2". However, sometimes we want to put $ in the string, so we need to allow escape.

find out all strings, not just string at top level

So now the following code works

#lang formatted-string racket/base

(define-values (x y z) (values 1 2 3))
"x = $x, y = $y, z = $z, (+ x y z) = $(+ x y z)"

but not

#lang formatted-string racket/base

(define-values (x y z) (values 1 2 3))
(define s "x = $x, y = $y, z = $z, (+ x y z) = $(+ x y z)")
s

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