[Issue 2848] New: static if (is(type)) + alias fails to compile

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=2848

           Summary: static if (is(type)) + alias fails to compile
           Product: D
           Version: 1.043
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: bugzilla at digitalmars.com
        ReportedBy: llucax at gmail.com


This simple test fails to compile:

static if (!is(typeof(no_type)))
        alias char[] no_type;
no_type x;

In all D compilers available, tested in GDC, DMD 1.043, DMD 2.027 and LDC r1197
(so it seems like a front-end issue).

The error is:
t.d:3: Error: identifier 'no_type' is not defined
t.d:3: Error: no_type is used as a type
t.d:3: variable t.x voids have no value


This test doesn't compile either:

static if (!is(typeof(no_type))) {
        alias char[] no_type;
        no_type y;
}

Error:
t.d(3): Error: identifier 'no_type' is not defined
t.d(3): Error: no_type is used as a type
t.d(3): variable t.x voids have no value


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