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Merge pull request #34 from John-Colvin/fix_array_members

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Fix non-aggregate properties
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Sönke Ludwig 2019-10-24 21:06:17 +02:00 committed by GitHub
parent c3aa2cf750 c128744e19
commit 35058cfbc8
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GPG key ID: 4AEE18F83AFDEB23
1 changed files with 24 additions and 5 deletions
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29
source/taggedalgebraic/taggedalgebraic.d
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@ -613,6 +613,17 @@ unittest { // issue #13
assert(ta.foo() == "foo");
}
unittest
{
static union U { int[] a; }
TaggedAlgebraic!U ta;
ta = [1,2,3];
assert(ta.length == 3);
ta.length = 4;
//assert(ta.length == 4); //FIXME
assert(ta.opDispatch!"sizeof" == (int[]).sizeof);
}
/** Tests if the algebraic type stores a value of a certain data type.
*/
@ -778,10 +789,14 @@ private template hasAnyMember(TA, string name)
template impl(size_t i) {
static if (i >= Types.length) enum impl = false;
else static if (!isAggregateType!(Types[i])) enum impl = impl!(i+1);
else static if (__traits(hasMember, Types[i], name))
enum impl = true;
else enum impl = impl!(i+1);
else {
alias T = Types[i];
static if (__traits(hasMember, T, name)
// work around https://issues.dlang.org/show_bug.cgi?id=20316
|| (is(T : Q[], Q) && (name == "length" || name == "ptr" || name == "capacity")))
enum impl = true;
else enum impl = impl!(i+1);
}
}
alias hasAnyMember = impl!0;
@ -793,12 +808,16 @@ unittest {
struct S { int a, b; void foo() {}}
interface I { void bar() immutable; }
static union U { int x; S s; Rebindable!(const(I)) i; }
static union U { int x; S s; Rebindable!(const(I)) i; int[] a; }
alias TA = TaggedAlgebraic!U;
static assert(hasAnyMember!(TA, "a"));
static assert(hasAnyMember!(TA, "b"));
static assert(hasAnyMember!(TA, "foo"));
static assert(hasAnyMember!(TA, "bar"));
static assert(hasAnyMember!(TA, "length"));
static assert(hasAnyMember!(TA, "ptr"));
static assert(hasAnyMember!(TA, "capacity"));
static assert(hasAnyMember!(TA, "sizeof"));
static assert(!hasAnyMember!(TA, "put"));
static assert(!isOutputRange!(TA, int));
}