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Fix compile error for overloaded TaggedAlgebraic returns. Fixes #13.

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This commit is contained in:
Sönke Ludwig 2018-01-18 00:29:16 +01:00
parent 4438b542b2
commit 9b13f08a25
1 changed files with 17 additions and 2 deletions
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19
source/taggedalgebraic.d
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@ -595,6 +595,22 @@ unittest
}
}
unittest { // issue #13
struct S1 { int foo; }
struct S {
struct T { TaggedAlgebraic!S1 foo() { return TaggedAlgebraic!S1(42); } }
struct U { string foo() { return "foo"; } }
T t;
U u;
}
alias TA = TaggedAlgebraic!S;
auto ta = TA(S.T.init);
assert(ta.foo().get!(TaggedAlgebraic!S1) == 42);
ta = TA(S.U.init);
assert(ta.foo() == "foo");
}
/** Tests if the algebraic type stores a value of a certain data type.
*/
@ -867,8 +883,7 @@ private static auto implementOp(OpKind kind, string name, T, ARGS...)(ref T self
alias Alg = Algebraic!(NoDuplicates!(info.ReturnTypes));
info.ReturnTypes[i] ret = info.perform(self.trustedGet!FT, args);
import std.traits : isInstanceOf;
static if (isInstanceOf!(TaggedAlgebraic, typeof(ret))) return Alg(ret.payload);
else return Alg(ret);
return Alg(ret);
}
else static if (is(FT == Variant))
return info.perform(self.trustedGet!FT, args);