From 2b196a09925fda70536f3b383d1aefac6718af72 Mon Sep 17 00:00:00 2001
From: VAN BOSSUYT Nicolas <me@smnx.sh>
Date: Tue, 29 Oct 2024 21:06:01 +0100
Subject: [PATCH] karm-base: Allow constructing Cursor<T> and MutCursor<T> from
 Slice.

---
 src/libs/karm-base/cursor.h | 17 ++++++++++++++---
 1 file changed, 14 insertions(+), 3 deletions(-)

diff --git a/src/libs/karm-base/cursor.h b/src/libs/karm-base/cursor.h
index f810026fd5c..6714f07b477 100644
--- a/src/libs/karm-base/cursor.h
+++ b/src/libs/karm-base/cursor.h
@@ -14,6 +14,9 @@ struct Cursor {
 
     constexpr Cursor() = default;
 
+    always_inline constexpr Cursor(None)
+        : Cursor() {}
+
     always_inline constexpr Cursor(T const *ptr)
         : Cursor(ptr, ptr ? 1 : 0) {
     }
@@ -28,7 +31,10 @@ struct Cursor {
         : _begin(begin), _end(end) {
     }
 
-    always_inline constexpr Cursor(Sliceable<T> auto const &slice)
+    always_inline constexpr Cursor(Sliceable<T> auto &slice)
+        : Cursor{begin(slice), end(slice)} {}
+
+    always_inline constexpr Cursor(Slice<T> slice)
         : Cursor{begin(slice), end(slice)} {}
 
     always_inline constexpr T const &operator[](usize i) const {
@@ -127,9 +133,11 @@ struct MutCursor {
 
     constexpr MutCursor() = default;
 
+    always_inline constexpr MutCursor(None)
+        : MutCursor() {}
+
     always_inline constexpr MutCursor(T *ptr)
-        : MutCursor(ptr, ptr ? 1 : 0) {
-    }
+        : MutCursor(ptr, ptr ? 1 : 0) {}
 
     always_inline constexpr MutCursor(T *ptr, usize len)
         : _begin(ptr), _end(ptr + len) {
@@ -143,6 +151,9 @@ struct MutCursor {
     always_inline constexpr MutCursor(MutSliceable<T> auto &slice)
         : MutCursor{begin(slice), end(slice)} {}
 
+    always_inline constexpr MutCursor(MutSlice<T> slice)
+        : MutCursor{begin(slice), end(slice)} {}
+
     always_inline constexpr T &operator[](usize i) {
         if (i >= len()) [[unlikely]]
             panic("index out of bounds");