Should source code be saved in UTF-8 format

JARC Published at Java

JARC :

How important is it to save your source code in UTF-8 format?

Eclipse on Windows uses CP1252 character encoding by default. The CP1251 format means non UTF-8 characters can be saved and I have seen this happen if you copy and paste from a Word document for a comment.

The reason I ask is because out of habit I set-up Maven encoding to be in UTF-8 format and recently it has caught a few non mappable errors.

(update) Please add any reasons for doing so and why, are there some common gotchas that should be known?

(update) What is your goal? To find the best practice so when ask why should we use UTF-8 I have a good answer, right now I don't.

McDowell :

What is your goal? Balance your needs against the pros and cons of this choice.

UTF-8 Pros

allows use of all character literals without \uHHHH escaping

UTF-8 Cons

using non-ASCII character literals without \uHHHH increases risk of character corruption
- font and keyboard issues can arise
- need to document and enforce use of UTF-8 in all tools (editors, compilers build scripts, diff tools)
beware the byte order mark

ASCII Pros

character/byte mappings are shared by a wide range of encodings
- makes source files very portable
- often obviates the need for specifying encoding meta-data (since the files would be identical if they were re-encoded as UTF-8, Windows-1252, ISO 8859-1 and most things short of UTF-16 and/or EBCDIC)

ASCII Cons

limited character set
this isn't the 1960s

Note: ASCII is 7-bit, not "extended" and not to be confused with Windows-1252, ISO 8859-1, or anything else.

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edited at2020-08-28

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Should source code be saved in UTF-8 format

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