Orkuncakilkaya
f4533331e7
A reference from a module that declares uses into a module it does not name is refused, exported or not, naming the use and the fix. A module with no uses clause keeps the old rule; a package's module is always usable; a friend is not held to it; a cycle in the declared graph is refused; LUDIC_VIS_REPORT=1 lists the violations as uses: lines. Reseed. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
55 lines
2.3 KiB
Text
55 lines
2.3 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 named there
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# (frontend/modules.ludic), unless the referring module is a friend of it (a test harness).
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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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if g_vis_off { return }
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if d.file == null { 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 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 not module_may_use(from, to) {
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if vis_reporting() {
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vis_say(`uses: {d.file}:{itoa(d.line)}: {to}.{what} used from {here} (module {from})\n`)
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} else {
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perr(`{from} uses {to}.{what} ({d.file}:{itoa(d.line)}): add 'uses {to}' to {from}'s module line, or take it through a port`)
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}
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}
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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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