Allow dashes in identifiers

In Nixpkgs, the attribute in all-packages.nix corresponding to a
package is usually equal to the package name.  However, this doesn't
work if the package contains a dash, which is fairly common.  The
convention is to replace the dash with an underscore (e.g. "dbus-lib"
becomes "dbus_glib"), but that's annoying.  So now dashes are valid in
variable / attribute names, allowing you to write:

  dbus-glib = callPackage ../development/libraries/dbus-glib { };

and

  buildInputs = [ dbus-glib ];

Since we don't have a negation or subtraction operation in Nix, this
is unambiguous.
This commit is contained in:
Eelco Dolstra 2012-09-27 15:43:08 -04:00
parent f46612be96
commit 95c74eae26
4 changed files with 9 additions and 4 deletions

View file

@ -14,6 +14,11 @@
<itemizedlist>
<listitem>
<para>Dashes are now valid as part of identifiers and attribute
names.</para>
</listitem>
<listitem>
<para>Nix no longer sets the immutable bit on files in the Nix
store. Instead, the recommended way to guard the Nix store

View file

@ -78,7 +78,7 @@ The hook `nix-mode-hook' is run when Nix mode is started.
("\\<isNull\\>" . font-lock-builtin-face)
("[a-zA-Z][a-zA-Z0-9\\+-\\.]*:[a-zA-Z0-9%/\\?:@&=\\+\\$,_\\.!~\\*'-]+"
. font-lock-constant-face)
("\\<\\([a-zA-Z_][a-zA-Z0-9_'\.]*\\)[ \t]*="
("\\<\\([a-zA-Z_][a-zA-Z0-9_'\-\.]*\\)[ \t]*="
(1 font-lock-variable-name-face nil nil))
("<[a-zA-Z0-9._\\+-]+\\(/[a-zA-Z0-9._\\+-]+\\)*>"
. font-lock-constant-face)

View file

@ -78,7 +78,7 @@ static Expr * unescapeStr(SymbolTable & symbols, const char * s)
%}
ID [a-zA-Z\_][a-zA-Z0-9\_\']*
ID [a-zA-Z\_][a-zA-Z0-9\_\'\-]*
INT [0-9]+
PATH [a-zA-Z0-9\.\_\-\+]*(\/[a-zA-Z0-9\.\_\-\+]+)+
SPATH \<[a-zA-Z0-9\.\_\-\+]+(\/[a-zA-Z0-9\.\_\-\+]+)*\>

View file

@ -4,7 +4,7 @@ let
as = { x.y.z = 123; a.b.c = 456; };
bs = { foo.bar = "foo"; };
bs = { f-o-o.bar = "foo"; };
or = x: y: x || y;
@ -13,7 +13,7 @@ in
as.foo or "foo"
as.x.y.bla or as.a.b.c
as.a.b.c or as.x.y.z
as.x.y.bla or bs.foo.bar or "xyzzy"
as.x.y.bla or bs.f-o-o.bar or "xyzzy"
as.x.y.bla or bs.bar.foo or "xyzzy"
123.bla or null.foo or "xyzzy"
# Backwards compatibility test.