[Issue 17353] New: is expression type specialization matching strips const

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=17353

          Issue ID: 17353
           Summary: is expression type specialization matching strips
                    const
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: P1
         Component: dmd
          Assignee: nobody at puremagic.com
          Reporter: david.eckardt at sociomantic.com

const(T[]) matches an is-expression which it shouldn't match:

---
alias const(int[]) T;
static if (is(T U == U[]))
    static assert(is(T == U[])); // fails
---

The "static if" and "static assert" conditions should be equivalent so the
"static assert" should never fail. Instead the "static if" behaves as if the
is-expression would contain Unqual!T instead of T.

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