AK: Add a method to check if a UTF-16 string contains any code point

Author: trflynn89

AK/Utf16StringBase.h

@@ -219,6 +219,7 @@ class Utf16StringBase {
 
     [[nodiscard]] ALWAYS_INLINE bool contains(char16_t needle) const { return find_code_unit_offset(needle).has_value(); }
     [[nodiscard]] ALWAYS_INLINE bool contains(Utf16View const& needle) const { return find_code_unit_offset(needle).has_value(); }
+    [[nodiscard]] ALWAYS_INLINE bool contains_any_of(ReadonlySpan<u32> needles) const { return utf16_view().contains_any_of(needles); }
 
     [[nodiscard]] ALWAYS_INLINE size_t count(Utf16View const& needle) const { return utf16_view().count(needle); }
 

AK/Utf16View.h

@@ -480,6 +480,16 @@ class Utf16View {
     [[nodiscard]] constexpr bool contains(char16_t needle) const { return find_code_unit_offset(needle).has_value(); }
     [[nodiscard]] constexpr bool contains(Utf16View const& needle) const { return find_code_unit_offset(needle).has_value(); }
 
+    [[nodiscard]] constexpr bool contains_any_of(ReadonlySpan<u32> needles) const
+    {
+        for (auto code_point : *this) {
+            if (needles.contains_slow(code_point))
+                return true;
+        }
+
+        return false;
+    }
+
     [[nodiscard]] constexpr size_t count(Utf16View const& needle) const
     {
         if (needle.is_empty())

Tests/AK/TestUtf16View.cpp

@@ -564,6 +564,28 @@ TEST_CASE(contains)
     EXPECT(u"ab😀"sv.contains(u"😀"sv));
 }
 
+TEST_CASE(contains_any_of)
+{
+    EXPECT(!u""sv.contains_any_of({}));
+    EXPECT(!u"a"sv.contains_any_of({}));
+
+    EXPECT(u"a"sv.contains_any_of({ { 'a' } }));
+    EXPECT(u"a"sv.contains_any_of({ { 'a', 'b' } }));
+    EXPECT(u"b"sv.contains_any_of({ { 'a', 'b' } }));
+    EXPECT(!u"a"sv.contains_any_of({ { 'b' } }));
+    EXPECT(!u"b"sv.contains_any_of({ { 'a' } }));
+
+    EXPECT(u"ab"sv.contains_any_of({ { 'a' } }));
+    EXPECT(u"ab"sv.contains_any_of({ { 'b' } }));
+    EXPECT(u"ab"sv.contains_any_of({ { 'a', 'b' } }));
+    EXPECT(!u"ab"sv.contains_any_of({ { 'c' } }));
+
+    EXPECT(!u"😀"sv.contains_any_of({ { 0xd83d } }));
+    EXPECT(!u"😀"sv.contains_any_of({ { 0xde00 } }));
+    EXPECT(u"😀"sv.contains_any_of({ { 0x1f600 } }));
+    EXPECT(u"ab😀"sv.contains_any_of({ { 0x1f600 } }));
+}
+
 TEST_CASE(count)
 {
     EXPECT_EQ(u""sv.count({}), 0uz);