Don't use zeroes and zeroInit for C structs

src/entity.zig

@@ -130,7 +130,7 @@ pub fn Entity(comptime ctx: anytype) type {
                         .name => |n| {
                             const found = c.ecs_lookup_child(world.raw, parent_, n.ptr);
                             if (found == 0) {
-                                var desc = std.mem.zeroInit(c.ecs_entity_desc_t, .{ .sep = "".ptr, .name = n.ptr });
+                                var desc = c.ecs_entity_desc_t{ .sep = "".ptr, .name = n.ptr };
                                 desc.add[0] = c.ecs_pair(c.EcsChildOf, parent_);
                                 scope = c.ecs_entity_init(world.raw, &desc);
                                 if (scope == 0) return errors.getLastErrorOrUnknown();
@@ -145,13 +145,13 @@ pub fn Entity(comptime ctx: anytype) type {
             const previous = if (scope) |s| world.setScope(s) else null;
             defer _ = if (scope != null) world.setScope(previous);
 
-            var desc = std.mem.zeroInit(c.ecs_entity_desc_t, .{
+            var desc = c.ecs_entity_desc_t{
                 .sep = "".ptr, // Disable tokenization.
                 .id = if (id) |i| i else 0,
                 .name = if (name_) |n| n.ptr else null,
                 .symbol = if (config.symbol) |s| s.ptr else null,
                 .use_low_id = config.use_low_id,
-            });
+            };
 
             inline for (ids, 0..) |a, i|
                 desc.add[i] = Context.anyToId(a);

src/world.zig

@@ -107,12 +107,10 @@ pub fn World(comptime ctx: anytype) type {
             const name = meta.simpleTypeName(T);
             const entity_ = try self.entity(.{ .name = name, .symbol = name, .use_low_id = true }, .{});
 
-            const desc = std.mem.zeroInit(c.ecs_component_desc_t, .{
+            const result = c.ecs_component_init(self.raw, &.{
                 .entity = entity_.raw,
                 .type = .{ .size = @sizeOf(T), .alignment = @alignOf(T) },
             });
-
-            const result = c.ecs_component_init(self.raw, &desc);
             if (result == 0) return errors.getLastErrorOrUnknown();
             Context.lookupMut(T).* = result;
             return Entity.fromRaw(self, result);
@@ -167,15 +165,13 @@ pub fn World(comptime ctx: anytype) type {
                 self.entity(.{ .name = name }, .{});
 
             const context = try SystemCallbackContext.init(self, callback);
-            var desc = std.mem.zeroInit(c.ecs_system_desc_t, .{
+            const result = c.ecs_system_init(self.raw, &.{
                 .entity = entity_.raw,
                 .callback = &SystemCallbackContext.invoke,
                 .binding_ctx = context,
                 .binding_ctx_free = &SystemCallbackContext.free,
+                .query = .{ .filter = .{ .expr = expr } },
             });
-            desc.query.filter.expr = expr;
-
-            const result = c.ecs_system_init(self.raw, &desc);
             if (result == 0) return errors.getLastErrorOrUnknown();
             return Entity.fromRaw(self, result);
         }
@@ -212,8 +208,7 @@ pub fn World(comptime ctx: anytype) type {
         /// that have a specific `Id`. This function supports wildcards.
         pub fn term(self: *Self, id: anytype) TermIterator {
             const id_ = Context.anyToId(id);
-            var term_ = std.mem.zeroInit(c.ecs_term_t, .{ .id = id_ });
+            const iter = c.ecs_term_iter(self.raw, &.{ .id = id_ });
-            const iter = c.ecs_term_iter(self.raw, &term_);
             return .{ .world = self, .iter = iter };
         }