diff options
| -rw-r--r-- | src/nix-instantiate/main.cc | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/src/nix-instantiate/main.cc b/src/nix-instantiate/main.cc index 3e9fad4ae4c3..3161d17f42ec 100644 --- a/src/nix-instantiate/main.cc +++ b/src/nix-instantiate/main.cc @@ -73,6 +73,23 @@ static void printDrvPaths(EvalState & state, Expr e) return; } + ATermList formals; + ATerm body, pos; + if (matchFunction(e, formals, body, pos)) { + for (ATermIterator i(formals); i; ++i) { + Expr name, def; + if (matchNoDefFormal(*i, name)) + throw Error(format("expression evaluates to a function with no-default arguments (`%1%')") + % aterm2String(name)); + else if (!matchDefFormal(*i, name, def)) + abort(); /* can't happen */ + } + + printDrvPaths(state, evalExpr(state, + makeCall(e, makeAttrs(ATermMap())))); + return; + } + throw Error("expression does not evaluate to one or more derivations"); } |