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Add RAPIDJSON_NOEXCEPT_ASSERT

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This is an alternative implementation to #1284 to handle
asserts in noexcept contexts.

Closes #1280.
This commit is contained in:
Philipp A Hartmann 2018-07-18 12:02:24 +02:00 committed by Philipp A Hartmann
parent 2bbd33b332
commit f54f6b5aa9
2 changed files with 25 additions and 8 deletions
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14
include/rapidjson/document.h
View File

@ -37,9 +37,6 @@ RAPIDJSON_DIAG_OFF(4244) // conversion from kXxxFlags to 'uint16_t', possible lo
#ifdef __GNUC__
RAPIDJSON_DIAG_OFF(effc++)
#if __GNUC__ >= 6
RAPIDJSON_DIAG_OFF(terminate) // ignore throwing RAPIDJSON_ASSERT in RAPIDJSON_NOEXCEPT functions
#endif
#endif // __GNUC__
#ifndef RAPIDJSON_NOMEMBERITERATORCLASS
@ -625,11 +622,11 @@ public:
\note Default content for number is zero.
*/
explicit GenericValue(Type type) RAPIDJSON_NOEXCEPT : data_() {
static const uint16_t defaultFlags[7] = {
static const uint16_t defaultFlags[] = {
kNullFlag, kFalseFlag, kTrueFlag, kObjectFlag, kArrayFlag, kShortStringFlag,
kNumberAnyFlag
};
RAPIDJSON_ASSERT(type >= kNullType && type <= kNumberType);
RAPIDJSON_NOEXCEPT_ASSERT(type >= kNullType && type <= kNumberType);
data_.f.flags = defaultFlags[type];
// Use ShortString to store empty string.
@ -831,9 +828,10 @@ public:
/*! \param rhs Source of the assignment. It will become a null value after assignment.
*/
GenericValue& operator=(GenericValue& rhs) RAPIDJSON_NOEXCEPT {
RAPIDJSON_ASSERT(this != &rhs);
this->~GenericValue();
RawAssign(rhs);
if (RAPIDJSON_LIKELY(this != &rhs)) {
this->~GenericValue();
RawAssign(rhs);
}
return *this;
}

19
include/rapidjson/rapidjson.h
View File

@ -598,6 +598,25 @@ RAPIDJSON_NAMESPACE_END
//!@endcond
//! Assertion (in non-throwing contexts).
/*! \ingroup RAPIDJSON_CONFIG
Some functions provide a \c noexcept guarantee, if the compiler supports it.
In these cases, the \ref RAPIDJSON_ASSERT macro cannot be overridden to
throw an exception. This macro adds a separate customization point for
such cases.
Defaults to C \c assert() (as \ref RAPIDJSON_ASSERT), if \c noexcept is
supported, and to \ref RAPIDJSON_ASSERT otherwise.
*/
#ifndef RAPIDJSON_NOEXCEPT_ASSERT
#if RAPIDJSON_HAS_CXX11_NOEXCEPT
#include <cassert>
#define RAPIDJSON_NOEXCEPT_ASSERT(x) assert(x)
#else
#define RAPIDJSON_NOEXCEPT_ASSERT(x) RAPIDJSON_ASSERT(x)
#endif // RAPIDJSON_HAS_CXX11_NOEXCEPT
#endif // RAPIDJSON_NOEXCEPT_ASSERT
///////////////////////////////////////////////////////////////////////////////
// new/delete