• via Digitalmars-d-bugs (24/24) Apr 08 2015 https://issues.dlang.org/show_bug.cgi?id=14425

via Digitalmars-d-bugs <digitalmars-d-bugs puremagic.com> writes:

https://issues.dlang.org/show_bug.cgi?id=14425

          Issue ID: 14425
           Summary: Indirect template instantiation within is expression
                    causes missing linker symbols
           Product: D
           Version: D2
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: P1
         Component: DMD
          Assignee: nobody puremagic.com
          Reporter: sludwig outerproduct.org

The following causes the linker to complain about missing
Foo!string.__xopEquals and .__xtoHash:

---
struct Foo(I) { I i; }
struct Bar(I) { I i; }
static assert(is(Foo!(Bar!string)));
---

Workaround is to explicitly instantiate the template:

alias Workaround = Foo!(Bar!string);

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