C++ <错误 C2059：语法错误：'constant'> 使用 const int 编译时
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<error C2059: syntax error : 'constant'> when compiling with const int
提问by user1572019
I am getting the following errors when compiling the below code:
编译以下代码时出现以下错误：
3>c:\hedge\hedge\hedge\AisTarget.h(22) : error C2059: syntax error : 'constant'
3>c:\hedge\hedge\hedge\AisTarget.h(22) : error C2238: unexpected token(s) preceding ';'
#if !defined(AisTarget_h)
#define AisTarget_h
#include "GeneralAviationItems.h"
#include <string>
namespace HEDGE {
using namespace GeneralAviation;
class AisTarget : public WaypointLatLon {
public:
static const int NO_DATA = -1000; //here is the error
};
} // end namespace HEDGE
#endif
回答by jxh
It is likely that NO_DATAis already defined as a macro elsewhere, and so it is expanding into something that does not agree with the compiler's notion of a variable name. Try re-naming NO_DATAto something else.
它很可能NO_DATA已经在其他地方定义为宏，因此它正在扩展为与编译器的变量名称概念不一致的内容。尝试重新命名NO_DATA为其他名称。
If there were no such conflict, the code as it were would compile fine, as demonstrated here.
如果没有这样的冲突，代码，因为它是将编译罚款，这表现在这里。
回答by gilgamash
Even if this post has its age: The error can generally occur when multiple redefinitions, even regardless of upper/lower case, coexist. This includes potential preprocessor definitions in the solution's .vcprojxfile!. Consider something like
即使这篇文章有它的年龄：当多个重新定义（即使大小写）共存时，通常也会发生错误。这包括解决方案的.vcprojx文件中潜在的预处理器定义！. 考虑类似
<ItemDefinitionGroup>
<ClCompile>
<PreprocessorDefinitions>$(Configuration);%(PreprocessorDefinitions)</PreprocessorDefinitions>
</ClCompile>
</ItemDefinitionGroup>
in the above mentioned file. Now, having "Debug" and "Release" configurations you will most probably run into some problems and a potential source for the C2059 error. I experienced exaclty this dilemma.
在上面提到的文件中。现在，有了“调试”和“发布”配置，您很可能会遇到一些问题和 C2059 错误的潜在来源。我经历过这种困境。
