“。不能出现在常量表达式中 [英] `.' cannot appear in a constant-expression

问题描述

我收到以下错误：

 `。'不能出现在常量表达式中
  
 
 
 
（第4行）：
  bool Covers（const Region< C，V，D>& other）const {
 const Region& me = * this; 
 for（unsigned d = 0; d  if（me [d] .min> other [d] .min || me [d] .max< other [d] .max）{
 return false; 
} 
} 
  
任何人都可以解释问题吗？
 
 
 
  EDIT： 
 
 
 
 Region的定义是：
 模板< typename C，typename V，unsigned D> 
 class Region：public boost :: array< Detail :: Range< C>，D> $       
 
解决方案
   p>试试你的代码告诉我，编译器有一个问题与 me [d] .max<其他[d] .max 部分。所以点的问题是假的。相反，编译器具有比较运算符的问题。只是恢复比较使得编译器错误神奇地消失：
  if（me [i] .min> other [i]。 min || other [i] .max> me [i] .max）{
 return false; 
} 
  
 
I'm getting the following error:
`.' cannot appear in a constant-expression
for this function (line 4):
    bool Covers(const Region<C,V,D>& other) const {
        const Region& me = *this;
        for (unsigned d = 0; d < D; d++) {
            if (me[d].min > other[d].min || me[d].max < other[d].max) {
                return false;
            }
        }
can anyone explain the problem please?


EDIT:

the definition of Region is:
template <typename C, typename V, unsigned D>
class Region : public boost::array<Detail::Range<C>,D>
when Range has a min and max variables.
解决方案
Trying out your code tells me, that the compiler has a problem with the me[d].max < other[d].max part. So the problem with the dot was bogus. Instead the compiler has a problem with the comparison operator. Just reverting the comparison made the compiler error magically disappear:
if (me[i].min > other[i].min || other[i].max > me[i].max) {
       return false;
}


                        
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