clang 3.6 rejects `const json_view invalid;` (no user-provided default constructor, CWG 253), as fixed in json-view/10-view-document. Signed-off-by: Niels Lohmann <mail@nlohmann.me>
clang 3.6 rejects `const json_view invalid;` (no user-provided default constructor, CWG 253), as fixed in json-view/10-view-document. Signed-off-by: Niels Lohmann <mail@nlohmann.me>