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Add the "addErrorContext" builtin to add more information in the stack trace.

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This commit is contained in:
Nicolas Pierron 2009-01-27 14:36:44 +00:00
parent 061141e632
commit 110606d470
1 changed files with 14 additions and 0 deletions
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14
src/libexpr/primops.cc
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@ -190,6 +190,19 @@ static Expr prim_throw(EvalState & state, const ATermVector & args)
}
static Expr prim_addErrorContext(EvalState & state, const ATermVector & args)
{
PathSet context;
try {
return evalExpr(state, args[1]);
} catch (Error & e) {
e.addPrefix(format("%1%\n") %
evalString(state, args[0], context));
throw;
}
}
/* Return an environment variable. Use with care. */
static Expr prim_getEnv(EvalState & state, const ATermVector & args)
{
@ -976,6 +989,7 @@ void EvalState::addPrimOps()
addPrimOp("__genericClosure", 1, prim_genericClosure);
addPrimOp("abort", 1, prim_abort);
addPrimOp("throw", 1, prim_throw);
addPrimOp("__addErrorContext", 2, prim_addErrorContext);
addPrimOp("__getEnv", 1, prim_getEnv);
addPrimOp("__trace", 2, prim_trace);