• via Digitalmars-d-bugs (25/25) May 09 2017 https://issues.dlang.org/show_bug.cgi?id=17387

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

https://issues.dlang.org/show_bug.cgi?id=17387

          Issue ID: 17387
           Summary: static struct this(ref) not pure
           Product: D
           Version: D2
          Hardware: x86
                OS: Windows
            Status: NEW
          Severity: minor
          Priority: P1
         Component: dmd
          Assignee: nobody puremagic.com
          Reporter: nick geany.org

struct S { this(ref int val) { ++val; } }

pure unittest
{
    int val = 3;
    auto s = S(val);
    assert(val == 4);
}

The above fails to compile with dmd v2.074.0:
purestaticstruct.d(6): Error: pure function 'purestaticstruct.__unittestL3_1'
cannot call impure constructor 'purestaticstruct.S.this'

If the struct is moved inside the unittest, it compiles as expected.

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