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* builtins.trace: in the common case that the value is a string, then

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show the string, not the ATerm, so we get `trace: bla' instead of
  `trace: Str("bla",[])'.
This commit is contained in:
Eelco Dolstra 2009-10-22 08:10:12 +00:00
parent 437077c39d
commit deb342fb08
1 changed files with 6 additions and 1 deletions
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7
src/libexpr/primops.cc
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@ -256,7 +256,12 @@ static Expr prim_getEnv(EvalState & state, const ATermVector & args)
static Expr prim_trace(EvalState & state, const ATermVector & args)
{
Expr e = evalExpr(state, args[0]);
printMsg(lvlError, format("trace: %1%") % e);
string s;
PathSet context;
if (matchStr(e, s, context))
printMsg(lvlError, format("trace: %1%") % s);
else
printMsg(lvlError, format("trace: %1%") % e);
return evalExpr(state, args[1]);
}