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circbuf: iterator yields pointers

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This commit is contained in:
Mitchell Hashimoto
2023-10-23 12:56:41 -07:00
parent 7f5f6d01cf
commit 534ecb2d80
1 changed files with 18 additions and 18 deletions
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36
src/circ_buf.zig
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@ -31,7 +31,7 @@ pub fn CircBuf(comptime T: type, comptime default: T) type {
pub const Direction = enum { forward, reverse }; pub const Direction = enum { forward, reverse };
pub fn next(self: *Iterator) ?T { pub fn next(self: *Iterator) ?*T {
if (self.idx >= self.buf.len()) return null; if (self.idx >= self.buf.len()) return null;
// Get our index from the tail // Get our index from the tail
@ -43,7 +43,7 @@ pub fn CircBuf(comptime T: type, comptime default: T) type {
// Translate the tail index to a storage index // Translate the tail index to a storage index
const storage_idx = (self.buf.tail + tail_idx) % self.buf.capacity(); const storage_idx = (self.buf.tail + tail_idx) % self.buf.capacity();
self.idx += 1; self.idx += 1;
return self.buf.storage[storage_idx]; return &self.buf.storage[storage_idx];
} }
}; };
@ -292,8 +292,8 @@ test "forward iterator" {
try buf.append(2); try buf.append(2);
{ {
var it = buf.iterator(.forward); var it = buf.iterator(.forward);
try testing.expect(it.next().? == 1); try testing.expect(it.next().?.* == 1);
try testing.expect(it.next().? == 2); try testing.expect(it.next().?.* == 2);
try testing.expect(it.next() == null); try testing.expect(it.next() == null);
} }
@ -301,9 +301,9 @@ test "forward iterator" {
try buf.append(3); try buf.append(3);
{ {
var it = buf.iterator(.forward); var it = buf.iterator(.forward);
try testing.expect(it.next().? == 1); try testing.expect(it.next().?.* == 1);
try testing.expect(it.next().? == 2); try testing.expect(it.next().?.* == 2);
try testing.expect(it.next().? == 3); try testing.expect(it.next().?.* == 3);
try testing.expect(it.next() == null); try testing.expect(it.next() == null);
} }
@ -312,9 +312,9 @@ test "forward iterator" {
try buf.append(4); try buf.append(4);
{ {
var it = buf.iterator(.forward); var it = buf.iterator(.forward);
try testing.expect(it.next().? == 2); try testing.expect(it.next().?.* == 2);
try testing.expect(it.next().? == 3); try testing.expect(it.next().?.* == 3);
try testing.expect(it.next().? == 4); try testing.expect(it.next().?.* == 4);
try testing.expect(it.next() == null); try testing.expect(it.next() == null);
} }
} }
@ -338,8 +338,8 @@ test "reverse iterator" {
try buf.append(2); try buf.append(2);
{ {
var it = buf.iterator(.reverse); var it = buf.iterator(.reverse);
try testing.expect(it.next().? == 2); try testing.expect(it.next().?.* == 2);
try testing.expect(it.next().? == 1); try testing.expect(it.next().?.* == 1);
try testing.expect(it.next() == null); try testing.expect(it.next() == null);
} }
@ -347,9 +347,9 @@ test "reverse iterator" {
try buf.append(3); try buf.append(3);
{ {
var it = buf.iterator(.reverse); var it = buf.iterator(.reverse);
try testing.expect(it.next().? == 3); try testing.expect(it.next().?.* == 3);
try testing.expect(it.next().? == 2); try testing.expect(it.next().?.* == 2);
try testing.expect(it.next().? == 1); try testing.expect(it.next().?.* == 1);
try testing.expect(it.next() == null); try testing.expect(it.next() == null);
} }
@ -358,9 +358,9 @@ test "reverse iterator" {
try buf.append(4); try buf.append(4);
{ {
var it = buf.iterator(.reverse); var it = buf.iterator(.reverse);
try testing.expect(it.next().? == 4); try testing.expect(it.next().?.* == 4);
try testing.expect(it.next().? == 3); try testing.expect(it.next().?.* == 3);
try testing.expect(it.next().? == 2); try testing.expect(it.next().?.* == 2);
try testing.expect(it.next() == null); try testing.expect(it.next() == null);
} }
} }