[Bug 77] New: After a compile error occurs, all template instances fail

[Kyle Furlong]

d-bugmail at puremagic.com wrote:
> http://d.puremagic.com/bugzilla/show_bug.cgi?id=77
> 
>            Summary: After a compile error occurs, all template instances
>                     fail
>            Product: D
>            Version: 0.150
>           Platform: All
>         OS/Version: Windows
>             Status: NEW
>           Severity: major
>           Priority: P2
>          Component: DMD
>         AssignedTo: bugzilla at digitalmars.com
>         ReportedBy: clugdbug at yahoo.com.au
> 
> 
> This is the simplest example I could come up with. If you swap the order of
> line(10) and line(11), you just get "undefined identifier b". With the order as
> written, the correct error is followed by spurious error messages:
> 
> mar30.d(10): undefined identifier b
> mar30.d(11): voids have no value
> mar30.d(11): cannot implicitly convert expression (dog!(int)) of type void to
> in
> t
> 
> And with a real project, thousands of lines of incorrect error messages can be
> generated by a single typo! In fact, I now encounter this bug every time I get
> any error message at all. I'd rank it as the most annoying bug in DMD. I
> consider this severity=major -- I've had to temporarily abandon some of my
> metaprogramming work because of it.
> 
> -------
> template dog(pig) {
>     const int dog=2;
> }
> 
> void main() {
>     int a;
>     a=b;              // line (10)
>     a = dog!(int);    // line (11)
> }
> 
> 

Yeah I we've been talking about this for a while, definitely a must fix.