sc.ini and delegates

[Nick Sabalausky]

On 2/24/2014 3:54 PM, Eugene Yang wrote:
> Hello all,
>
> If I want to set custom imports and library search paths for a specific
> project, how do I specify those paths in the sc.ini file?  Setting the
> DFLAGS environment variable seems to override the default settings; is
> there a way I can append to the default DFLAGS variable?
>

sc.ini isn't really the right place for custom or project-specific 
imports. Just use the compiler's -I... flag, and wrap it up in a 
one-liner shell script if you need to.

> I get an error saying that toInverse is not callable with the argument
> type dchar.  Why is line, which should be immutable(char)[] being casted
> as a dchar array?
>

Because of Unicode. Despite the outdated name, a "char" is not really a 
character, it's a UTF-8 code unit, not a code point, and not a grapheme 
(ie a full character).

See this if you're not already up-to-speed on code units vs code points:
http://www.joelonsoftware.com/articles/Unicode.html

Working with code units instead of code points is usually the wrong 
thing to do and leads to lots of bugs with non-english text. So by 
default, D iterates strings by 32-bit code point, not by code unit 
(behind the scenes, it calls decode()).

Since code points and code units are ONLY equivalent in UTF-32, D always 
uses the 32-bit dchar to represent code points. So no matter whether 
you're iterating a UTF-8 string, a UTF-16 wstring or UTF-32 dstring, D's 
default is to always iterate by decoding one code point (as a dchar) at 
a time.

In the rare cases you want to iterate by individual code units (never do 
this unless you have a strong grasp of Unicode and really know what 
you're doing), you can do this:

string foo = ...;
foreach(char ch; foo) {...}