Joseph Ferano
d803078699
sin and cos in the prelude rather than copied per file, with the caveat sqrt does not have: IEEE-754 makes sqrt correctly rounded and requires nothing of the kind for sine, so these are the one place the prelude may disagree bit for bit between native and wasm32. A program hashing output across targets must not route the hash through one. Arithmetic folds left over as many operands as you write, and so does the constant folder, which otherwise refused (defconst n (* 2 3 4)) after the checker had accepted it. One operand is refused by name: there is no unary minus, and the message points at (- 0 x), which is what the prelude writes. The typed let binding is a grammar question and is written up rather than guessed at. The break banner premise had gone stale -- check.sh already runs that demo under a timeout and keeps what it printed.
