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.
46 lines
2.1 KiB
Plaintext
46 lines
2.1 KiB
Plaintext
;;;; A defn named after a builtin, and what the name means afterwards.
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;;;;
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;;;; "Allow shadowing but warn": this file's (defn get ...) is legal, it wins
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;;;; at every call site in this file, and the compiler says so once at the
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;;;; definition — the warning is on stderr and the exit status does not move.
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;;;;
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;;;; Five lines printed, and between them the whole rule. In order:
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;;;;
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;;;; - 7: (get p) is one argument, which the builtin get does not take. It
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;;;; compiles, and it prints the field, because the name resolves to the
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;;;; definition below and the builtin is not consulted about its arity.
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;;;; - 4: (shadowed/field m) reaches into the imported package, whose body
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;;;; calls the builtin get on a dyn map. The shadow does not follow it
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;;;; there: a package's calls mean what they meant when it was written.
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;;;; - 99: an operator is a builtin like any other and shadows like one.
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;;;; - 999: this file's own len, which is what len means in this file.
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;;;; - 4 again, and it is the one that needed the work: the package's global
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;;;; initialiser (defonce size i32 (len "abcd")) is checked with no
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;;;; enclosing function at all, so there is no qualified name on it to say
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;;;; it belongs to a package. The file it was written in says so instead.
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(import shadowed "pkgs/shadowed")
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(defstruct P [x i32])
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(defn get [p P] i32 (.x p))
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;;; An operator is a builtin like any other, and shadows like any other: (+ 1
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;;; 2) below is this definition and answers 99. Nothing else in the program
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;;; adds anything, and the prelude's own additions are untouched — the
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;;; prelude is a different file.
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(defn + [a i32 b i32] i32 99)
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;;; And a builtin the imported package uses in a *global initialiser*, which
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;;; is the one place there is no enclosing function to carry a package's
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;;; qualified name. The package's (defonce size i32 (len "abcd")) is 4; this
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;;; definition answers 999 and is reached only here.
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(defn len [s string] i32 999)
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(defn main [] ()
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(println (get (P {.x 7})))
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(println (shadowed/field {:a 1 :b 4}))
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(println (+ 1 2))
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(println (len "abcd"))
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(println (shadowed/stored-size)))
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