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* New primop: abort "error message".

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This commit is contained in:
Eelco Dolstra 2006-08-23 15:46:00 +00:00
parent 4a053bfdfd
commit 38f18aa6d4
4 changed files with 12 additions and 2 deletions
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4
src/libexpr/eval.cc
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@ -515,7 +515,7 @@ Expr evalExpr2(EvalState & state, Expr e)
try { try {
return concatStrings(state, args); return concatStrings(state, args);
} catch (Error & e) { } catch (Error & e) {
e.addPrefix(format("in a string concatenation: ")); e.addPrefix(format("in a string concatenation:\n"));
throw; throw;
} }
} }
@ -527,7 +527,7 @@ Expr evalExpr2(EvalState & state, Expr e)
ATermList l2 = evalList(state, e2); ATermList l2 = evalList(state, e2);
return makeList(ATconcat(l1, l2)); return makeList(ATconcat(l1, l2));
} catch (Error & e) { } catch (Error & e) {
e.addPrefix(format("in a list concatenation: ")); e.addPrefix(format("in a list concatenation:\n"));
throw; throw;
} }
} }

1
src/libexpr/nixexpr.hh
View file

@ -11,6 +11,7 @@
MakeError(EvalError, Error) MakeError(EvalError, Error)
MakeError(AssertionError, EvalError) MakeError(AssertionError, EvalError)
MakeError(Abort, EvalError)
MakeError(TypeError, EvalError) MakeError(TypeError, EvalError)

8
src/libexpr/primops.cc
View file

@ -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. */ /* Apply a function to every element of a list. */
static Expr primMap(EvalState & state, const ATermVector & args) static Expr primMap(EvalState & state, const ATermVector & args)
{ {
@ -700,6 +707,7 @@ void EvalState::addPrimOps()
addPrimOp("toString", 1, primToString); addPrimOp("toString", 1, primToString);
addPrimOp("isNull", 1, primIsNull); addPrimOp("isNull", 1, primIsNull);
addPrimOp("dependencyClosure", 1, primDependencyClosure); addPrimOp("dependencyClosure", 1, primDependencyClosure);
addPrimOp("abort", 1, primAbort);
addPrimOp("map", 2, primMap); addPrimOp("map", 2, primMap);
addPrimOp("removeAttrs", 2, primRemoveAttrs); addPrimOp("removeAttrs", 2, primRemoveAttrs);

1
tests/lang/eval-fail-abort.nix Normal file
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@ -0,0 +1 @@
if true then abort "this should fail" else 1