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| author | Eelco Dolstra <eelco.dolstra@logicblox.com> | 2012-09-27T19·43-0400 |
|---|---|---|
| committer | Eelco Dolstra <eelco.dolstra@logicblox.com> | 2012-09-27T19·49-0400 |
| commit | 95c74eae269b2b9e4bc514581b5caa1d80b54acc (patch) | |
| tree | f8f36185fa71202a79ed320e2a413433f957ff63 /src/libexpr/lexer.l | |
| parent | f46612be96a70a188cd48462ac94089d3e95a36b (diff) | |
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.
Diffstat (limited to 'src/libexpr/lexer.l')
| -rw-r--r-- | src/libexpr/lexer.l | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/libexpr/lexer.l b/src/libexpr/lexer.l index d46b66d9ff7c..b61d5ea7713c 100644 --- a/src/libexpr/lexer.l +++ b/src/libexpr/lexer.l @@ -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\.\_\-\+]+)*\> |