Swift : Writing ESCAPED Characters

DaveS · 30 September 2023 20:27

Ok… this is a bit confusing, hopefully I can describe the situation clearly.

I have a SWIFT App that reads a TEXT file and then from that writes a SWIFT project file

The Input file may contain phrases the contain characters that SWIFT has to handle internally as escaped

Those are

So when this text is read in, the app converts the string so Swift can deal with it internally

s="This \ is a 'String'"

interally is

s="This \\ is a \'String\'"

However, I need to further escape things so when it is written out, the result can be compiled properly

When SWIFT writes the escaped string (2nd example) back to a text file, the result is the 1st Example

So I need to take and make a 3rd Example that appears in the text file like then 2nd, so when it compiles it comes out as the first string

confused? me too.

breaking down to a super simple example

Text Input : a="\"

what this app needs to WRITE is

Output : a="\\"

but again internally Swift already has it as

var s = "a=\"\\\\"

If I split that into single character array I get

V=["\"", "\\", "\""]

it is the middle \ that needs to somehow be changed

if v[1]=="\\" then v[1]=?????

??? can’t be /// or any other odd value

DaveS · 30 September 2023 20:37

The answer turned out to be quite simple actually

In the output file, just add # to the string

var s = #"a="\""#

Torsten_B · 1 October 2023 04:50

Still confused. What is the # character’s purpose? Any documentation you could point us to?

npalardy · 1 October 2023 05:46

Swift, like many other languages, supports different kinds of string literals for different purposes