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langref: document UTF-8 BOM handling

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The current compiler ignores the UTF-8 BOM if it is at the start of the
file, and disallows it anywhere else.  Document it in the Source Encoding
section.
This commit is contained in:
Manlio Perillo 2023-01-16 19:14:43 +01:00 committed by Veikka Tuominen
parent 7b68b76326
commit 06e9b2c4e3
1 changed files with 4 additions and 0 deletions
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doc/langref.html.in
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@ -11480,6 +11480,10 @@ fn readU32Be() u32 {}
but use of hard tabs is discouraged. See {#link|Grammar#}.
</p>
<p>
For compatibility with other tools, the compiler ignores a UTF-8-encoded byte order mark (U+FEFF)
if it is the first Unicode code point in the source text. A byte order mark is not allowed anywhere else in the source.
</p>
<p>
Note that running <kbd>zig fmt</kbd> on a source file will implement all recommendations mentioned here.
Note also that the stage1 compiler does <a href="https://github.com/ziglang/zig/wiki/FAQ#why-does-zig-force-me-to-use-spaces-instead-of-tabs">not yet support CR or HT</a> control characters.
</p>