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to/from_json: add a MSVC-specific static_assert to force a stacktrace

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Théo DELRIEU 2017-12-05 10:52:55 +01:00
parent f4c01601fa
commit c9a02cbc59
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1 changed files with 13 additions and 0 deletions
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13
src/json.hpp
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@ -1351,6 +1351,13 @@ struct to_json_fn
{ {
static_assert(sizeof(BasicJsonType) == 0, static_assert(sizeof(BasicJsonType) == 0,
"could not find to_json() method in T's namespace"); "could not find to_json() method in T's namespace");
#ifdef _MSC_VER
// Visual Studio does not show a stacktrace for the above assert.
using decayed = uncvref_t<T>;
static_assert(sizeof(typename decayed::force_msvc_stacktrace) == 0,
"forcing msvc stacktrace to show which T we're talking about.");
#endif
} }
public: public:
@ -1378,6 +1385,12 @@ struct from_json_fn
{ {
static_assert(sizeof(BasicJsonType) == 0, static_assert(sizeof(BasicJsonType) == 0,
"could not find from_json() method in T's namespace"); "could not find from_json() method in T's namespace");
#ifdef _MSC_VER
// Visual Studio does not show a stacktrace for the above assert.
using decayed = uncvref_t<T>;
static_assert(sizeof(typename decayed::force_msvc_stacktrace) == 0,
"forcing msvc stacktrace to show which T we're talking about.");
#endif
} }
public: public: