t27 basics 17: a struct and its fields

A t27 struct and a packed struct drawn as tables of fields, with how many backends compiled them. Lesson 17 of the t27 basics course.

This page sets no cookie and sends nothing anywhere.

Where the numbers come from

The lesson spec public/t27/files/specs/basics/17_structs.t27, compiled clean on 7 backends by public/t27/t27_compiler.wasm, whose tests pass in the site test runner
Compiler verdicts, error lines, code and counts quoted on this page are what the same wasm answered in node 22 when the course was authored; words without a run behind them are said to be read, not run