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Merge pull request #854 from theodelrieu/fix/force_msvc_stacktrace

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to/from_json: add a MSVC-specific static_assert to force a stacktrace
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Niels Lohmann 2017-12-05 19:36:31 +01:00 committed by GitHub
parent f4c01601fa c9a02cbc59
commit 0e3a0b730b
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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,
"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:
@ -1378,6 +1385,12 @@ struct from_json_fn
{
static_assert(sizeof(BasicJsonType) == 0,
"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: