85c85
<     const fields = ???;
---
>     const fields = @typeInfo(@TypeOf(tuple)).Struct.fields;
92c92
<     for (fields) |field| {
---
>     inline for (fields) |field| {
116c116
<         //         @field(foo, "x"); // returns the value at foo.x
---
>         //         @field(foo, "x");
120,122c120,122
<             field.???,
<             field.???,
<             ???,
---
>             field.name,
>             field.field_type,
>             @field(tuple, field.name),