Re: messaging

[Kai Henningsen <kai.extern@googlemail.com>]

Arthur Schwarz schrieb:
> In the following code fragment:
> 
> # include <ios>
> # include <fstream>
> # include <istream>
> 
> using namespace std;
> void CommandLine(int argc, char** argv);
> int main(int argc, char** argv) {
>    CommandLine(argc, argv[]);
>    ifstream x.open(argv[1], ios:in);
>    ofstream y.open(argv[1], ios::in);
>    
>    return 0;
> };
> 
> g++-4 messaging is:
>>> g++-4 x.cpp
> x.cpp: In function 'int main(int, char**)':
> x.cpp:8: error: expected primary-expression before ']' token
> x.cpp:10: error: expected primary-expression before ':' token
> 
> A recommendation and reason for change is:
> 1: x.cpp:8 error: illegal to pass an array without subscript value as an 
>    argument
>    The given message is accurate but non-expressive of the reason
>    for failure.

Actually, in this case I'd say that the original message is perfectly 
fine, and your suggestion is rather confusing. However, what one could 
say here is something like "[] is only allowed in declarations".


> 3: cpp:10 error: illegal scope resolution operator ':'
>    From memory, there are three uses of ':' in C++
>    ':'   label terminator, <label>:
>    ':'   case in a switch statement, case <value>:
>    ':'   scope resolution operator, "::"
>    The given diagnostic message is deceptive. 

Could perhaps say "':' is not a scope resolution operator", unless 
someone comes up with a use case where it is ...