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我想使用rapidjson加載JSON文檔。解析後,斷言doc.IsObject()失敗,我不明白爲什麼。 我非常肯定文件名是正確的,我測試了jsonContent:OK。Rapidjson:doc.IsObject()在解析後返回false,即使doc.GetType()返回kObjectType
下面是加載代碼:
std::ifstream file(filename);
std::string jsonContent((std::istreambuf_iterator<char>(file)), (std::istreambuf_iterator<char>()));
rapidjson::Document doc;
doc.Parse < rapidjson::kParseStopWhenDoneFlag, rapidjson::UTF8<> >(jsonContent.c_str(), jsonContent.length());
assert(doc.IsObject());
這裏是加載的JSON:
{
"version": "170301",
"lang": "en"
}
這裏是輸出:
MyTest: /home/dev/Projects/myproject/src/loadJson.cpp:85: void loadFile(const std::string &): Assertion `doc.IsObject()' failed. unknown location(0): fatal error in "MyTest": signal: SIGABRT (application abort requested)
我執行該用gdb,並得到了以下信息(斷言之前的斷點):
(gdb) p doc
$1 = {<rapidjson::GenericValue<rapidjson::UTF8<char>, rapidjson::MemoryPoolAllocator<rapidjson::CrtAllocator> >> = {static kDefaultArrayCapacity = 16, static kDefaultObjectCapacity = 16, data_ = {s = {
length = 2, hashcode = 2,
str = 0x30000006a5b48 <error: Cannot access memory at address 0x30000006a5b48>}, ss = {
str = "\002\000\000\000\002\000\000\000H[j\000\000"}, n = {i = {i = 2,
padding = "\002\000\000"}, u = {u = 2, padding2 = "\002\000\000"}, i64 = 8589934594,
u64 = 8589934594, d = 4.2439915829186759e-314}, o = {size = 2, capacity = 2,
members = 0x30000006a5b48}, a = {size = 2, capacity = 2, elements = 0x30000006a5b48}, f = {
payload = "\002\000\000\000\002\000\000\000H[j\000\000", flags = 3}}},
static kDefaultStackCapacity = 1024, allocator_ = 0x7fff00000000, ownAllocator_ = 0x691460,
stack_ = {allocator_ = 0x691460, ownAllocator_ = 0x0, stack_ = 0x0, stackTop_ = 0x0,
stackEnd_ = 0x0, initialCapacity_ = 0}, parseResult_ = {code_ = **rapidjson::kParseErrorNone,**
offset_ = 0}}
(gdb) p doc.GetType()
$2 = rapidjson::kObjectType
(gdb) p doc.IsObject()
$3 = false
(gdb) p jsonContent
$4 = "{\n\t\"version\": \"170301\",\n\t\"lang\": \"en\"\n}\n\n"
我嘗試了列出的所有變體here,並且我得到了與所有變體相同的斷言失敗。