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authorEelco Dolstra <e.dolstra@tudelft.nl>2006-08-23T15·46+0000
committerEelco Dolstra <e.dolstra@tudelft.nl>2006-08-23T15·46+0000
commit38f18aa6d418515e42b688fa9b3e4f3ab61bb89e (patch)
tree3859e7778e44814cdb00f2693dd5778d0e0cb88e /src/libexpr
parent4a053bfdfd85915a2a659a337bd171bc22c49138 (diff)
* New primop: abort "error message".
Diffstat (limited to 'src/libexpr')
-rw-r--r--src/libexpr/eval.cc4
-rw-r--r--src/libexpr/nixexpr.hh1
-rw-r--r--src/libexpr/primops.cc8
3 files changed, 11 insertions, 2 deletions
diff --git a/src/libexpr/eval.cc b/src/libexpr/eval.cc
index ce38e2ab9213..c4f5d7f5d64d 100644
--- a/src/libexpr/eval.cc
+++ b/src/libexpr/eval.cc
@@ -515,7 +515,7 @@ Expr evalExpr2(EvalState & state, Expr e)
         try {
             return concatStrings(state, args);
         } catch (Error & e) {
-            e.addPrefix(format("in a string concatenation: "));
+            e.addPrefix(format("in a string concatenation:\n"));
             throw;
         }
     }
@@ -527,7 +527,7 @@ Expr evalExpr2(EvalState & state, Expr e)
             ATermList l2 = evalList(state, e2);
             return makeList(ATconcat(l1, l2));
         } catch (Error & e) {
-            e.addPrefix(format("in a list concatenation: "));
+            e.addPrefix(format("in a list concatenation:\n"));
             throw;
         }
     }
diff --git a/src/libexpr/nixexpr.hh b/src/libexpr/nixexpr.hh
index 28ac35e604ec..3eb4d4cb2bec 100644
--- a/src/libexpr/nixexpr.hh
+++ b/src/libexpr/nixexpr.hh
@@ -11,6 +11,7 @@
 
 MakeError(EvalError, Error)
 MakeError(AssertionError, EvalError)
+MakeError(Abort, EvalError)
 MakeError(TypeError, EvalError)
 
 
diff --git a/src/libexpr/primops.cc b/src/libexpr/primops.cc
index bc4db2d81306..2bc5459d1306 100644
--- a/src/libexpr/primops.cc
+++ b/src/libexpr/primops.cc
@@ -629,6 +629,13 @@ static Expr primDependencyClosure(EvalState & state, const ATermVector & args)
 }
 
 
+static Expr primAbort(EvalState & state, const ATermVector & args)
+{
+    throw Abort(format("evaluation aborted with the following error message: %1%") %
+        evalString(state, args[0]));
+}
+
+
 /* Apply a function to every element of a list. */
 static Expr primMap(EvalState & state, const ATermVector & args)
 {
@@ -700,6 +707,7 @@ void EvalState::addPrimOps()
     addPrimOp("toString", 1, primToString);
     addPrimOp("isNull", 1, primIsNull);
     addPrimOp("dependencyClosure", 1, primDependencyClosure);
+    addPrimOp("abort", 1, primAbort);
 
     addPrimOp("map", 2, primMap);
     addPrimOp("removeAttrs", 2, primRemoveAttrs);