[libcxx] [test] Suppress float->int narrowing warning in vector range-construction test.

[CaseyCarter]

test/std/containers/sequences/vector/vector.cons/construct_iter_iter.pass.cpp

159

This will blow up non-MSVC-ish when running the test suite with -Wall -W -Werror (which is typical). I suggest wrapping in #ifdef _MSC_VER.

[BillyONeal]

test/std/containers/sequences/vector/vector.cons/construct_iter_iter.pass.cpp

159

Why didn't it blow up on Contest then? clang-cl is happy with it?

[CaseyCarter]

test/std/containers/sequences/vector/vector.cons/construct_iter_iter.pass.cpp

159

clang-cl is the "ish" in my "MSVC-ish" (MSVC and compilers emulating MSVC). GCC and clang-without--fms-compatibility when compiling with -Wall warn about unrecognized pragmas, just as does cl in default mode (https://godbolt.org/z/Chue0L).

[EricWF]

This LGTM after correctly wrapping it as Casey mentionse.

[CaseyCarter]

test/std/containers/sequences/vector/vector.cons/construct_iter_iter.pass.cpp

159

Correction: Wrap with #ifdef TEST_COMPILER_C1XX instead of #ifdef _MSC_VER.

[BillyONeal]

It looks like someone already fixed this.

test/std/containers/sequences/vector/vector.cons/construct_iter_iter.pass.cpp

 struct Der : B1, B2 { int z; };
 
 // Initialize a vector with a different value type.
 void test_ctor_with_different_value_type() {
   {
     // Make sure initialization is performed with each element value, not with
     // a memory blob.
     float array[3] = {0.0f, 1.0f, 2.0f};
+#pragma warning(suppress: 4244) // narrowing float to int
     std::vector<int> v(array, array + 3);
     assert(v[0] == 0);
     assert(v[1] == 1);
     assert(v[2] == 2);
   }
   {
     Der z;
     Der *array[1] = { &z };