[libcxx-commits] [libcxx] [libc++] LWG2381: Inconsistency in parsing floating point numbers (PR #77948)

[A. Jiang via libcxx-commits]

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@@ -165,10 +166,11 @@ int main(int, char**)
             f.get(cpp17_input_iterator<const char*>(str),
                   cpp17_input_iterator<const char*>(str+sizeof(str)),
                   ios, err, v);
-        assert(base(iter) == str+sizeof(str)-1);
-        assert(err == ios.goodbit);
-        assert(std::isnan(v));
+        assert(base(iter) == str);
+        assert(err == ios.failbit);
+        assert(v == 0.0l);
     }
+#if LDBL_MANT_DIG >= 64
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frederick-vs-ja wrote:

Thanks for the correction. I've verified that `1.189731495357231765021264e+49321` and `1.189731495357231765021264e+49329` consistently result in infinity on MSVC, so perhaps these cases shouldn't be guarded.

https://github.com/llvm/llvm-project/pull/77948