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authorEelco Dolstra <e.dolstra@tudelft.nl>2003-11-05T16·27+0000
committerEelco Dolstra <e.dolstra@tudelft.nl>2003-11-05T16·27+0000
commitfa18f1f184ba89b3dfe592e77a276da42d326f42 (patch)
tree886b09a52f176178190f24c095192fac32b11bab /src/fix-ng/primops.hh
parente17e95a82892b31c8063f2ace1b21c79e82e6f6d (diff)
* Assertions.
* Logical operators (!, &&, ||, ->).

Diffstat (limited to 'src/fix-ng/primops.hh')
-rw-r--r--src/fix-ng/primops.hh9
1 files changed, 6 insertions, 3 deletions
diff --git a/src/fix-ng/primops.hh b/src/fix-ng/primops.hh
index e48883b0bb01..775ec5568208 100644
--- a/src/fix-ng/primops.hh
+++ b/src/fix-ng/primops.hh
@@ -8,7 +8,6 @@
    argument. */ 
 Expr primImport(EvalState & state, Expr arg);
 
-
 /* Construct (as a unobservable) side effect) a Nix derivation
    expression that performs the derivation described by the argument
    set.  Returns the original set extended with the following
@@ -18,14 +17,18 @@ Expr primImport(EvalState & state, Expr arg);
    derivation. */
 Expr primDerivation(EvalState & state, Expr args);
 
-
 /* Return the base name of the given string, i.e., everything
    following the last slash. */
 Expr primBaseNameOf(EvalState & state, Expr arg);
 
-
 /* Convert the argument (which can be a path or a uri) to a string. */
 Expr primToString(EvalState & state, Expr arg);
 
+/* Return the null value. */
+Expr primNull(EvalState & state, Expr arg);
+
+/* Determine whether the argument is the null value. */
+Expr primIsNull(EvalState & state, Expr arg);
+
 
 #endif /* !__PRIMOPS_H */