special-form heads are not shadowable

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Found in a read/eval review: a local named like a special form wrongly took
over operator position. (let [if (fn ...)] (if true 1 2)) returned the fn, but
per spec section 3 (and the reference) special-form heads are not shadowable;
only macros are. Two fixes: drop the (not shadowed) guard on the special-form
branch of analyze-list (so an (if ...) head is always the special), and prefix
a local whose name is a Scheme keyword when emitting (so a value local legally
named if does not shadow the (if ...) the back end emits). Value-position
locals named if/or/case still work.

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Yogthos 2026-06-22 01:01:53 -04:00

parent f18ae3bd46

commit 212cd0399a

5 changed files with 106 additions and 81 deletions

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