From: Mikko Rasa <tdb@tdb.fi>
Date: Mon, 3 Jun 2019 11:50:39 +0000 (+0300)
Subject: Fix formatted output operator detection in lexicalcast.h
X-Git-Url: http://git.tdb.fi/?p=libs%2Fcore.git;a=commitdiff_plain;h=4f04dc8e2dcb48d524c141cb14ce05b655608454;hp=4f04dc8e2dcb48d524c141cb14ce05b655608454

Fix formatted output operator detection in lexicalcast.h

Since it was using a default-constructed value as part of the test
expression, it would fail to detect the operator for classes that are
not default-constructable.
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