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Fix a number of bugs in __val_expr's subset operator[].

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The current definitions were entirely broken. They didn't call any
existing constructor and the forgot to friend the expression types they
were trying to construct.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@357453 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eric Fiselier
2019-04-02 08:05:23 +00:00
parent 7b9927381c
commit 571eaaa095
9 changed files with 359 additions and 222 deletions
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29
test/std/numerics/numarray/template.valarray/valarray.sub/slice_const.pass.cpp
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@@ -17,15 +17,24 @@
int main(int, char**)
{
int a1[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15};
std::valarray<int> v1(a1, sizeof(a1)/sizeof(a1[0]));
std::valarray<int> v2 = v1[std::slice(1, 5, 3)];
assert(v2.size() == 5);
assert(v2[0] == 1);
assert(v2[1] == 4);
assert(v2[2] == 7);
assert(v2[3] == 10);
assert(v2[4] == 13);
{
int a1[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15};
const std::valarray<int> v1(a1, sizeof(a1)/sizeof(a1[0]));
std::valarray<int> v2 = v1[std::slice(1, 5, 3)];
assert(v2.size() == 5);
assert(v2[0] == 1);
assert(v2[1] == 4);
assert(v2[2] == 7);
assert(v2[3] == 10);
assert(v2[4] == 13);
}
{
int a1[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15};
const std::valarray<int> v1(a1, sizeof(a1)/sizeof(a1[0]));
std::valarray<int> v2 = (v1 + 0)[std::slice(0, 2, 3)];
assert(v2.size() == 2);
assert(v2[0] == 0);
assert(v2[1] == 3);
}
return 0;
}