How to resolve the algorithm Here document step by step in the Racket programming language

Published on 12 May 2024 09:40 PM
#Racket

How to resolve the algorithm Here document step by step in the Racket programming language

Table of Contents

Problem Statement

A   here document   (or "heredoc")   is a way of specifying a text block, preserving the line breaks, indentation and other whitespace within the text. Depending on the language being used, a   here document   is constructed using a command followed by "<<" (or some other symbol) followed by a token string. The text block will then start on the next line, and will be followed by the chosen token at the beginning of the following line, which is used to mark the end of the text block.

Demonstrate the use of   here documents   within the language.

Let's start with the solution:

Step by Step solution about How to resolve the algorithm Here document step by step in the Racket programming language

Source code in the racket programming language

#lang racket/base

(displayln #<<EOF
  Blah blah blah
    with indentation intact
    and "free" \punctuations\
EOF
)


#lang at-exp racket/base

(require scribble/text)

(define excited "!!!")
(define (shout . text) @list{>>> @text <<<})

(output
 @list{Blah blah blah
         with indentation intact
           but respecting the indentation of
           the whole code
         and "free" \punctuations\
         and even string interpolation-like @excited
           but really @shout{any code}

       })

(output @list|<<{And customizable delimiters
                 so @foo{} is just plain text}>>|)

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