[Issue 8978] Constructor is called instead of implicit cast when initializing from expression tuple

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=8978



--- Comment #1 from Denis Shelomovskij <verylonglogin.reg at gmail.com> 2012-11-08 16:49:42 MSK ---
It also affects templates with tuple parameter:
---
template expressionTuple(expressions...)
{ alias expressions expressionTuple; }

struct S
{
    int* p;
    this(const S) { }
}

void main()
{
    const S cs;

    static assert(!__traits(compiles, { S s = cs; })); // ok, cast is invalid

    void f(Args...)(Args args)
    {
        static assert(!__traits(compiles, { S s = args; })); // fails
    }
    f(cs);
}
---

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