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AK: Add Span<T>::index_of(ReadonlySpan)

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This will be used for case-sensitive substring index matches in a later
commit.
This commit is contained in:
Jelle Raaijmakers 2025-06-10 15:11:08 +02:00 • committed by Jelle Raaijmakers
commit b558b4dba6
Notes: github-actions[bot] 2025-06-13 13:11:07 +00:00
2 changed files with 33 additions and 0 deletions
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15
Tests/AK/TestSpan.cpp
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@ -180,3 +180,18 @@ TEST_CASE(compare_different_constness)
EXPECT_EQ(array, vector.span());
}
TEST_CASE(index_of)
{
constexpr Array haystack { 1, 2, 3, 4, 5 };
constexpr Array needle_1 { 2, 3, 4 };
constexpr Array needle_2 { 2, 4 };
constexpr Array<int, 0> needle_3 {};
EXPECT_EQ(1u, haystack.span().index_of(needle_1.span()).value());
EXPECT(!haystack.span().index_of(needle_1.span(), 2).has_value());
EXPECT(!haystack.span().index_of(needle_2.span()).has_value());
EXPECT_EQ(0u, haystack.span().index_of(needle_3.span()));
EXPECT_EQ(1u, haystack.span().index_of(needle_3.span(), 1));
EXPECT(!haystack.span().index_of(needle_3.span(), 16).has_value());
}