[zile-devel] [ zile-Bugs-1889859 ] indent_relative always uses spaces

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Bugs item #1889859, was opened at 2008-02-08 21:49
Message generated for change (Comment added) made by rrt
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Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Nobody/Anonymous (nobody)
Assigned to: Nobody/Anonymous (nobody)
Summary: indent_relative always uses spaces

Initial Comment:
In line.c, the function indent_relative always inserts spaces, regardless of 
how the previous line is indented or indent-tabs-mode.  As a result, with 
indent-tabs-mode t, this input:

<TAB>foo
<TAB>bar

produces this output:

<TAB>foo
<SPACE><...><SPACE>bar

Obviously, this could break any file with syntactically significant whitespace. 
 Even when whitespace is used only for formatting, nobody wants inconsistent 
indentation.  (Anyone who doesn't care wouldn't need to set indent-tabs-mode.)

Fortunately, the most flexible solution is also the simplest: indent_relative 
should replicate exactly the indentation of the previous line, as its name 
implies.

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>Comment By: Reuben Thomas (rrt)
Date: 2008-02-08 22:50

Message:
Logged In: YES 
user_id=50145
Originator: NO

I'm afraid that while you're right that Zile should not just use spaces,
and I'll fix that, you're wrong that it should (or could) copy the
indentation of the previous line, as that is not what indent-relative does
in Emacs, and it is more important that Zile behave exactly like Emacs than
that it fix design bugs. Emacs's indent-relative indents by calling
indent-to, which indents a given amount using spaces and tabs. So if you've
used anything other than tabs up to a multiple of 8 followed by <8 spaces,
you lose, sorry.

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