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switch list to optional return

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This commit is contained in:
Christoph Urlacher
2022-07-19 23:09:55 +02:00
parent 78f38f46ef
commit 241699a9bf
3 changed files with 141 additions and 129 deletions
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13
c_os/user/lib/List.h
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@ -3,6 +3,7 @@
#include "lib/OutStream.h"
#include "user/lib/Iterator.h"
#include <optional>
// Define the list interface for ArrayList/LinkedList implementations with support for Iterators/ranged based for loops
@ -24,15 +25,15 @@ public:
virtual unsigned int insert_last(Type e) = 0;
// Remove
virtual Type remove_at(unsigned int i) = 0;
virtual Type remove_first() = 0;
virtual Type remove_last() = 0;
virtual std::optional<Type> remove_at(unsigned int i) = 0;
virtual std::optional<Type> remove_first() = 0;
virtual std::optional<Type> remove_last() = 0;
virtual bool remove(Type e) = 0;
// Get
virtual Type get(unsigned int i) const = 0;
virtual Type first() const = 0;
virtual Type last() const = 0;
virtual std::optional<Type> get(unsigned int i) const = 0;
virtual std::optional<Type> first() const = 0;
virtual std::optional<Type> last() const = 0;
// Misc
virtual bool empty() const = 0;