[llvm] b39f437 - [ADT] add initializer list specialization for is_contained
Chris Bieneman via llvm-commits
llvm-commits at lists.llvm.org
Tue Mar 29 10:39:47 PDT 2022
Author: Chris Bieneman
Date: 2022-03-29T12:39:39-05:00
New Revision: b39f437757967687dd60d9d5a657cc3b421cf83d
URL: https://github.com/llvm/llvm-project/commit/b39f437757967687dd60d9d5a657cc3b421cf83d
DIFF: https://github.com/llvm/llvm-project/commit/b39f437757967687dd60d9d5a657cc3b421cf83d.diff
LOG: [ADT] add initializer list specialization for is_contained
Adding an initializer list specialization for is_contained allows for
compile-time evaluation when called with a constant or runtime
evaluation for non-constant values.
This patch doesn't add any uses of this template, but that is coming in
a subsequent patch.
Reviewed By: pete
Differential Revision: https://reviews.llvm.org/D122079
Added:
Modified:
llvm/include/llvm/ADT/STLExtras.h
llvm/unittests/ADT/STLExtrasTest.cpp
Removed:
################################################################################
diff --git a/llvm/include/llvm/ADT/STLExtras.h b/llvm/include/llvm/ADT/STLExtras.h
index ff2145e6861ea..75d7175453583 100644
--- a/llvm/include/llvm/ADT/STLExtras.h
+++ b/llvm/include/llvm/ADT/STLExtras.h
@@ -1657,6 +1657,15 @@ bool is_contained(R &&Range, const E &Element) {
return std::find(adl_begin(Range), adl_end(Range), Element) != adl_end(Range);
}
+template <typename T>
+constexpr bool is_contained(std::initializer_list<T> Set, T Value) {
+ // TODO: Use std::find when we switch to C++20.
+ for (T V : Set)
+ if (V == Value)
+ return true;
+ return false;
+}
+
/// Wrapper function around std::is_sorted to check if elements in a range \p R
/// are sorted with respect to a comparator \p C.
template <typename R, typename Compare> bool is_sorted(R &&Range, Compare C) {
diff --git a/llvm/unittests/ADT/STLExtrasTest.cpp b/llvm/unittests/ADT/STLExtrasTest.cpp
index 6d4325e49f363..09ff556f3ea15 100644
--- a/llvm/unittests/ADT/STLExtrasTest.cpp
+++ b/llvm/unittests/ADT/STLExtrasTest.cpp
@@ -964,4 +964,29 @@ TEST(STLExtrasTest, TypeAtIndex) {
(std::is_same<double, llvm::TypeAtIndex<2, int, float, double>>::value));
}
+enum Doggos {
+ Floofer,
+ Woofer,
+ SubWoofer,
+ Pupper,
+ Pupperino,
+ Longboi,
+};
+
+TEST(STLExtrasTest, IsContainedInitializerList) {
+ EXPECT_TRUE(is_contained({Woofer, SubWoofer}, Woofer));
+ EXPECT_TRUE(is_contained({Woofer, SubWoofer}, SubWoofer));
+ EXPECT_FALSE(is_contained({Woofer, SubWoofer}, Pupper));
+ EXPECT_FALSE(is_contained({}, Longboi));
+
+ static_assert(is_contained({Woofer, SubWoofer}, SubWoofer), "SubWoofer!");
+ static_assert(!is_contained({Woofer, SubWoofer}, Pupper), "Missing Pupper!");
+
+ EXPECT_TRUE(is_contained({1, 2, 3, 4}, 3));
+ EXPECT_FALSE(is_contained({1, 2, 3, 4}, 5));
+
+ static_assert(is_contained({1, 2, 3, 4}, 3), "It's there!");
+ static_assert(!is_contained({1, 2, 3, 4}, 5), "It's not there :(");
+}
+
} // namespace
More information about the llvm-commits
mailing list