Instance of a non-templated class using templated constructor interpreted as a function definition?

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感情败类
感情败类 2021-01-20 12:20

My issue is best demonstrated by the following code:

#include 
#include 

class Bar
{
    public: template 

        
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  •  旧巷少年郎
    2021-01-20 13:15

    ArunMu gets partial credit, it is indeed an example of Most Vexing Parse, but that term was coined in Meyer's Effective STL (Chapter 1, Item 6) not Exceptional C++.

    It is being interpreted as a function pointer (the (__cdecl *) portion of the error is a dead give away), and apparently the C++ standard requires it to be interpreted that way. Does anyone have a chapter/verse citation for that?

    There is also a another solution to provide a disambiguation. Adding an additional set of parenthesis around each parameter works too:

    Bar bar( (std::istream_iterator(file)), (std::istream_iterator()) );
    

    It's also worth pointing out that the issue is unrelated to the templates, as I had originally thought.

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