AK: Reimplement StringView::find methods in StringUtils

This patch reimplements the StringView::find methods in StringUtils, so
they can also be used by String. The methods now also take an optional
start parameter, which moves their API in line with String's respective
methods.

This also implements a StringView::find_ast(char) method, which is
currently functionally equivalent to find_last_of(char). This is because
find_last_of(char) will be removed in a further commit.

1 files changed, 6 insertions, 1 deletions

diff --git a/AK/StringUtils.h b/AK/StringUtils.h
index fa7ae1902d..f7211b0561 100644
--- a/AK/StringUtils.h
+++ b/AK/StringUtils.h
@@ -57,7 +57,12 @@ bool contains(const StringView&, const StringView&, CaseSensitivity);
 bool is_whitespace(const StringView&);
 StringView trim(const StringView& string, const StringView& characters, TrimMode mode);
 StringView trim_whitespace(const StringView& string, TrimMode mode);
-Optional<size_t> find(const StringView& haystack, const StringView& needle);
+
+Optional<size_t> find(StringView const& haystack, char needle, size_t start = 0);
+Optional<size_t> find(StringView const& haystack, StringView const& needle, size_t start = 0);
+Optional<size_t> find_last(StringView const& haystack, char needle);
+Vector<size_t> find_all(StringView const& haystack, StringView const& needle);
+
 String to_snakecase(const StringView&);
 
 }