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32 lines
644 B
D
32 lines
644 B
D
// REQUIRED_ARGS: -preview=fieldwise -O
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// https://issues.dlang.org/show_bug.cgi?id=21821
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// test case comes from unittests in core.lifetime
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void test()
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{
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alias T = immutable(S);
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T source;
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T target;
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copyEmplacex(source, target);
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T expectedCopy = source;
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assert(target == expectedCopy);
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}
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struct S
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{
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int x = 42;
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this(this) { x += 10; }
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}
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void copyEmplacex(ref immutable(S) source, ref immutable(S) target) @system
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{
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import core.stdc.string : memcpy;
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memcpy(cast(S*) &target, cast(S*) &source, S.sizeof);
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(cast() target).__xpostblit(); // casting away immutable
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}
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void main()
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{
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test();
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}
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