[Bug c++/64228] New: compile error not accurate expected ; before string constant

[Bug c++/64228] New: compile error not accurate expected ; before string constant

[jg at jguk dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64228

            Bug ID: 64228
           Summary: compile error not accurate expected ; before string
                    constant
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: jg at jguk dot org

Using cygwin gcc (GCC) 4.8.3

Wondering if the missing << operator in the following line could be identified


$ g++ -O -Wall -Werror -o main main.cpp
main.cpp: In function ‘int main()’:
main.cpp:10:31: error: expected ‘;’ before string constant
     std::cout << "oops " << i " number" << endl;
                               ^

#include <iostream>
int main()
{
    int i = 0;

    std::cout << "oops " << i " number" << endl;
    return 0;
}

Perhaps could say:

error: expected ‘;’ or ‘<<’ before string constant


Although, I realise there may be many things that could be fit in this space.
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Subject: [Bug c++/63578] ICE with may_alias and auto
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idc578

Ville Voutilainen <ville.voutilainen at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2014-12-08
                 CC|                            |ville.voutilainen at gmail dot com
            Version|unknown                     |4.8.2
     Ever confirmed|0                           |1
      Known to fail|                            |4.8.2, 4.9.1, 5.0

[Bug c++/64228] compile error not accurate expected ; before string constant

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64228

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|normal                      |enhancement
     Ever confirmed|0                           |1
   Last reconfirmed|                            |2021-08-27
             Status|UNCONFIRMED                 |NEW

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
The trunk show:
<source>: In function 'int main()':
<source>:7:30: error: expected ';' before string constant
    7 |     std::cout << "oops " << i " number" << endl;
      |                              ^~~~~~~~~~
      |                              ;

Error recovery is always hard even saying << might be wrong when you want +.

[Bug c++/64228] compile error not accurate expected ; before string constant

[jg at jguk dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64228

--- Comment #2 from Jonny Grant <jg at jguk dot org> ---
(In reply to Andrew Pinski from comment #1)
> The trunk show:
> <source>: In function 'int main()':
> <source>:7:30: error: expected ';' before string constant
>     7 |     std::cout << "oops " << i " number" << endl;
>       |                              ^~~~~~~~~~
>       |                              ;
> 
> Error recovery is always hard even saying << might be wrong when you want +.

Hi Andrew
You're right. The suggestion might not be what was desired. The caret location
is enough to help programmer fix the build error.

[Bug c++/64228] compile error not accurate expected ; before string constant

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64228

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |WONTFIX

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
>The caret location is enough to help programmer fix the build error.

So I am going to close this as won't fix.  I do think GCC can improve in other
areas dealing with error messages and there are many other open bugs dealing
those.