C++ 中的额外限定错误
我有一个成员函数,定义如下:
Value JSONDeserializer::ParseValue(TDR 类型,const json_string& valueString);
当我编译源代码时,我得到:
<块引用>错误:成员 'ParseValue' 上的额外限定 'JSONDeserializer::'
这是什么?如何消除此错误?
解决方案这是因为您有以下代码:
class JSONDeserializer{值 JSONDeserializer::ParseValue(TDR 类型,const json_string& valueString);};
这不是有效的 C++,但 Visual Studio 似乎接受它.您需要将其更改为以下代码,才能使用符合标准的编译器进行编译(在这一点上 gcc 更符合标准).
class JSONDeserializer{值解析值(TDR 类型,const json_string& valueString);};
错误来自于JSONDeserializer::ParseValue
是一个限定名(具有命名空间限定的名称),并且这样的名称在类中被禁止作为方法名.>
I have a member function that is defined as follows:
Value JSONDeserializer::ParseValue(TDR type, const json_string& valueString);
When I compile the source, I get:
error: extra qualification 'JSONDeserializer::' on member 'ParseValue'
What is this? How do I remove this error?
解决方案This is because you have the following code:
class JSONDeserializer
{
Value JSONDeserializer::ParseValue(TDR type, const json_string& valueString);
};
This is not valid C++ but Visual Studio seems to accept it. You need to change it to the following code to be able to compile it with a standard compliant compiler (gcc is more compliant to the standard on this point).
class JSONDeserializer
{
Value ParseValue(TDR type, const json_string& valueString);
};
The error come from the fact that JSONDeserializer::ParseValue
is a qualified name (a name with a namespace qualification), and such a name is forbidden as a method name in a class.
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