Orkuncakilkaya
808c4a6f7a
action Name { fields } is a typed record; reducer State on Action(s: mut State, a: Action) { ... }
in the module that owns the state takes exactly that state and the action (a second state is
refused); dispatch Action { fields } queues one from anywhere, the queue supplied by the runtime.
The queue is drained at the end of every phase of the frame loop, after every phase of ludic.base's
core_tick_all, and by drain_actions(): in dispatch order, each action's reducers in the order of
their states' names, an action a reducer dispatches queued behind, a queue still growing after 64
rounds stopped with the action named. Examples actions/pack, phases, runaway; rejects for a second
state, a reducer on a non-action and an unknown dispatch; ludic.base's actions_test; LANGUAGE.md.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
64 lines
3.1 KiB
Text
64 lines
3.1 KiB
Text
# emit_vis.ludic — L3: module scope. A file belongs to the module its own `module NAME` line or
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# its importer's names (frontend/parse.ludic, module_of); a file in no module is public. A
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# reference from one module to another module's function, global, record or event needs that
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# declaration `export`ed, and - when the referring module says `uses` - that module (or, for a
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# package with no module line, the package) named there (frontend/modules.ludic), unless the
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# referring module is a friend of it (a test harness). The engine's runtime needs no naming.
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# LUDIC_VIS_REPORT=1 prints every violation as `vis: <file>: <module>.<name>` (a private name) or
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# `uses: <file>: ...` (a module not in the uses list) and goes on, so a tool can add the exports
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# and the uses a codebase needs before the rule is switched on for it.
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var g_vis_report: int = -1
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var g_vis_off: bool = false # a port's binding: checked where it is written (ports.ludic)
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function vis_reporting() -> bool {
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if g_vis_report < 0 {
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g_vis_report = 0
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if getenv("LUDIC_VIS_REPORT") != null { g_vis_report = 1 }
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}
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return g_vis_report == 1
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}
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# `what` is the name as written at the reference
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# a generic function's instance is named for its type arguments (grow$int); a message names grow
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function vis_plain(what: pointer) -> pointer {
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var i = 0
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while i < len(what) {
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if what[i] == '$' { return what[0 .. i] }
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i += 1
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}
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return what
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}
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function vis_say(m: pointer) -> void {
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file_write(file_stderr(), m, len(m))
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}
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function vis_check(d: Node, what0: pointer) -> void {
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if d == null { return }
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port_check_bound(d)
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deps_edge(d, what0) # LUDIC_DEPS: the graph ludic deps reads (emit_deps.ludic)
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if g_vis_off { return }
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if d.file == null { return }
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# 0.S: a state's instance, supplied by the runtime (a component's or a view's glue, an entry's
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# parameters): the code that names it only passes it on
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if d.kind == N_VAR and d.uns == 1 and is_state_ty(d.ty) and len(d.s) > 6 and (d.s[0 .. 6] == "state$") { return }
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# 0.R: the action queue and the reducers are the runtime's to call, from any module
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if d.kind == N_FN and (is_action_builtin(d.s) or (len(d.s) > 14 and (d.s[0 .. 14] == "ludic_reduce__"))) { return }
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let what = vis_plain(what0)
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var here = g_err_file
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if here == null { return }
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let from = module_of(here)
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let uto = module_for_uses(d.file)
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if not (uto == "") and not (from == uto) and not module_friend_of(from, uto) and not module_may_use(from, uto) {
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if vis_reporting() {
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vis_say(`uses: {d.file}:{itoa(d.line)}: {uto}.{what} used from {here} (module {from})\n`)
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} else {
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perr(`{from} uses {uto}.{what} ({d.file}:{itoa(d.line)}): add 'uses {uto}' to {from}'s module line, or take it through a port`)
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}
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}
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let to = module_of(d.file)
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if (to == "") or (from == to) { return }
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if module_friend_of(from, to) { return }
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if d.vis == 1 { return }
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if vis_reporting() {
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vis_say(`vis: {d.file}:{itoa(d.line)}: {to}.{what} used from {here}\n`)
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return
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}
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perr(`{what} is private to module {to}; mark it 'export' where it is declared ({d.file})`)
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}
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