fixed error where ArrayBackedSlice writers couldn't be used with serialize()

Author: r4gus

src/parse.zig

@@ -38,15 +38,19 @@ pub fn ArrayBackedSlice(
             raw: []u8,
             i: *usize,
 
-            pub fn writeAll(self: *const @This(), in: []const u8) !void {
+            pub const Error = error{
+                OutOfMemory,
+            };
+
+            pub fn writeAll(self: *const @This(), in: []const u8) Error!void {
                 if (self.raw.len - self.i.* < in.len) {
                     return error.OutOfMemory;
                 }
                 @memcpy(self.raw[self.i.* .. self.i.* + in.len], in);
                 self.i.* += in.len;
             }
 
-            pub fn writeByte(self: *const @This(), in: u8) !void {
+            pub fn writeByte(self: *const @This(), in: u8) Error!void {
                 if (self.i.* >= self.raw.len) {
                     return error.OutOfMemory;
                 }