Brummel
8860600e37
Add `(let-rec NAME (params ...) (type ...) (body ...) (in ...))` as a form-A surface and a `Term::LetRec` AST variant. The 16a desugar pass lifts each LetRec whose body has no captures from the enclosing scope to a synthetic top-level fn `<hint>$lr_N` and substitutes the original name; typecheck and codegen never see LetRec. Capture detection panics at desugar time, queued for 16b.2. Tests: 95 → 99 (+1 e2e local_rec_factorial_demo, +2 desugar unit, +1 parse unit). The new fixture `examples/local_rec_demo` runs `fact` at n=1, 3, 5 → prints 1, 6, 120. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
1 line
1.3 KiB
JSON
1 line
1.3 KiB
JSON
{"defs":[{"body":{"body":{"cond":{"args":[{"name":"n","t":"var"},{"lit":{"kind":"int","value":1},"t":"lit"}],"fn":{"name":"<=","t":"var"},"t":"app"},"else":{"args":[{"name":"n","t":"var"},{"args":[{"args":[{"name":"n","t":"var"},{"lit":{"kind":"int","value":1},"t":"lit"}],"fn":{"name":"-","t":"var"},"t":"app"}],"fn":{"name":"fact","t":"var"},"t":"app"}],"fn":{"name":"*","t":"var"},"t":"app"},"t":"if","then":{"lit":{"kind":"int","value":1},"t":"lit"}},"in":{"lhs":{"args":[{"args":[{"lit":{"kind":"int","value":1},"t":"lit"}],"fn":{"name":"fact","t":"var"},"t":"app"}],"op":"io/print_int","t":"do"},"rhs":{"lhs":{"args":[{"args":[{"lit":{"kind":"int","value":3},"t":"lit"}],"fn":{"name":"fact","t":"var"},"t":"app"}],"op":"io/print_int","t":"do"},"rhs":{"args":[{"args":[{"lit":{"kind":"int","value":5},"t":"lit"}],"fn":{"name":"fact","t":"var"},"t":"app"}],"op":"io/print_int","t":"do"},"t":"seq"},"t":"seq"},"name":"fact","params":["n"],"t":"letrec","type":{"effects":[],"k":"fn","params":[{"k":"con","name":"Int"}],"ret":{"k":"con","name":"Int"}}},"doc":"Iter 16b.1: drive a let-rec'd factorial helper at three inputs. Expected stdout (per line): 1, 6, 120.","kind":"fn","name":"main","params":[],"type":{"effects":["IO"],"k":"fn","params":[],"ret":{"k":"con","name":"Unit"}}}],"imports":[],"name":"local_rec_demo","schema":"ailang/v0"} |