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2012-07-18 Use "#pragma once" to prevent repeated header file inclusionEelco Dolstra1-10/+1
2008-07-01 * Export the nix-env derivation name parsing and version comparisonEelco Dolstra1-0/+33
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.