3 commits

Author	SHA1	Message	Date
Eelco Dolstra	d567baabbd	* Export the nix-env derivation name parsing and version comparison ... logic through the `parseDrvName' and `compareVersions' primops. This will allow expressions to easily check whether some dependency is a specific needed version or falls in some version range. See tests/lang/eval-okay-versions.nix for examples.	2008-07-01 10:10:32 +00:00
Eelco Dolstra	7349bd0176	New primitives: ... * `sub' to subtract two numbers. * `stringLength' to get the length of a string. * `substring' to get a substring of a string. These should be enough to allow most string operations to be expressed.	2007-01-29 14:23:09 +00:00
Eelco Dolstra	2ab4bc44c7	* Builtin function `add' to add integers. ... * Put common test functions in tests/lang/lib.nix.	2006-09-22 15:29:21 +00:00