http://d.puremagic.com/issues/show_bug.cgi?id=7395

           Summary: Need error on declaring a variable after `if`
                    and`synchronized` without {}
           Product: D
           Version: D1 & D2
          Platform: All
        OS/Version: All
            Status: NEW
          Keywords: diagnostic
          Severity: enhancement
          Priority: P2
         Component: DMD
        AssignedTo: nob...@puremagic.com
        ReportedBy: verylonglogin....@gmail.com


--- Comment #0 from Denis <verylonglogin....@gmail.com> 2012-01-29 15:13:17 MSK 
---
---
synchronized int i; // should be definitely an error

if(true) int i;     // IMHO, should be an error
if(true) l: f();    // should be probably an error
---

Consider the following D code copied from C:
---
volatile int* p; // volatile statements deprecated; use synchronized statements
instead
---
A one is forced to change `volatile` -> `synchronized` after brief look at the
error and, if he will be unhappy enough, his program will compile.

Therefore a case with `if` looks lass common but still signalize about an
error.
An it is an error in C# (like a variant with label probably because of possible
`l: int i;` case): `error CS1023: Embedded statement cannot be a declaration or
labeled statement`.

Also look at Issue 2197.

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