Joseph Ferano
a4c6b996ff
The trio the author decided on 2026-09-20 is now all built: def is CL's defparameter — its initialiser runs on every daemon re-run, unguarded, so an edited initialiser repaints the same storage on C-c C-c plus re-run — defonce (Clojure's name for CL's defvar, per the author) initialises once behind the .init~once. flag, and defconst stays the image. One parse arm reads both forms; the difference is Ast.reinit, carried to Tast.global's grerun. Emit.startup_plan gives a def no guard flag, and Check.check_global lifts every def initialiser — zero and literal included — into global/<n>, so the host's startup reaches it through the function cell and a re-evaluated def swaps it (Session's def_inits; Emit.redefinition declares the cell for a non-sibling target). The old defvar spelling is refused with the rename and both compiling spellings, and every program, test, doc and editor list is swept — except sand.flan, the author's live WIP, whose seven defvar lines are flagged in FIX.org and keep its three dependent tests red on this branch.
30 lines
1.1 KiB
Plaintext
30 lines
1.1 KiB
Plaintext
;;;; v5 is v4 with one difference: [extra] is an i32 rather than an i64.
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;;;;
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;;;; [extra] does not exist in the host — v3 introduced it at run time, so its
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;;;; storage was allocated by runtime/flan_dev.c the first time a module asked
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;;;; for it, and every later module that mentions the name is handed back that
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;;;; same allocation. Handing it back for a differently shaped type is layout
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;;;; drift: the new body would read and write at offsets the old allocation was
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;;;; never laid out for, and nothing downstream could ever say so. The registry
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;;;; compares the size it recorded against the size it is asked for and aborts
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;;;; instead — retyping a var needs a restart, and this is the file that says
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;;;; the guard is real.
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;;;;
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;;;; Loaded on top of v3, and never alongside v4: the process it aborts is the
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;;;; whole of the test.
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(defonce counter i64)
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(defonce extra i32)
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(defn helper [x i64] i64 (* x 2))
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(defn added [] i32
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(set extra (+ extra 100))
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extra)
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(defn bump [] i64
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(println "v5")
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(set counter (+ counter (i64 (added))))
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(helper counter))
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(defn outer [] i64 (bump))
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