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AILang/examples/eq_ord_user_adt.ail.json
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Brummel 92e830e6c2 iter 23.5: prelude free fns + E2E — Eq/Ord milestone close
Five polymorphic prelude free fns (ne/lt/le/gt/ge) plus three E2E
fixtures: positive composition over Int/Bool/Str, user-ADT with
user-written Eq/Ord on IntBox, and Float-NoInstance with a
Float-aware diagnostic addendum cross-referencing DESIGN.md §"Float
semantics".

Two checker-side fixes were needed alongside the prelude additions,
both symmetric to the iter 23.4-prep visibility fix:
- linearity::check_module_with_visible — workspace-aware callee-mode
  resolution so a Borrow-mode user fn forwarding into a prelude poly
  fn (e.g. `at_most x y = not (gt x y)`) doesn't false-fire
  consume-while-borrowed.
- mono::collect_mono_targets — distinguish rigid forall vars from
  unbound metavars; rigid-bearing free-fn targets skip (they get
  re-collected with concrete subst when the enclosing fn itself
  monomorphises). Without this, a polymorphic body calling another
  polymorphic free fn produced a spurious __Unit specialisation
  whose body referenced compare at Unit.

Roadmap split: shipped Eq/Ord half checked, Show + print-rewire half
remains pending behind the heap-Str ABI prerequisite. DESIGN.md
§"Prelude classes" amended.

One pre-existing fixture (test_22b1_missing_method) renamed its
class method ne → tne to avoid collision with the new prelude `ne`.

Bench: check.py + cross_lang.py exit 0; compile_check.py exits 1
with one sub-ms check_ms.local_rec_capture at +26% (tolerance 25%) —
prelude-growth-related noise-band fluctuation, ratifiable per spec
§248-249 and journal Concerns.
2026-05-12 00:38:52 +02:00

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{
"schema": "ailang/v0",
"name": "eq_ord_user_adt",
"imports": [],
"defs": [
{
"kind": "type",
"name": "IntBox",
"vars": [],
"doc": "A one-field box around an Int, used to demonstrate that the unified mono pass synthesises eq__IntBox from a user-written instance, not from the primitive == operator.",
"ctors": [
{ "name": "MkIntBox", "fields": [{ "k": "con", "name": "Int" }] }
]
},
{
"kind": "instance",
"class": "Eq",
"type": { "k": "con", "name": "IntBox" },
"doc": "Eq IntBox by structural unwrap of the inner Int.",
"methods": [
{
"name": "eq",
"body": {
"t": "lam",
"params": ["a", "b"],
"paramTypes": [
{ "k": "con", "name": "IntBox" },
{ "k": "con", "name": "IntBox" }
],
"retType": { "k": "con", "name": "Bool" },
"body": {
"t": "match",
"scrutinee": { "t": "var", "name": "a" },
"arms": [{
"pat": { "p": "ctor", "ctor": "MkIntBox", "fields": [{ "p": "var", "name": "ai" }] },
"body": {
"t": "match",
"scrutinee": { "t": "var", "name": "b" },
"arms": [{
"pat": { "p": "ctor", "ctor": "MkIntBox", "fields": [{ "p": "var", "name": "bi" }] },
"body": {
"t": "app",
"fn": { "t": "var", "name": "==" },
"args": [
{ "t": "var", "name": "ai" },
{ "t": "var", "name": "bi" }
]
}
}]
}
}]
}
}
}
]
},
{
"kind": "instance",
"class": "Ord",
"type": { "k": "con", "name": "IntBox" },
"doc": "Ord IntBox by delegating to Int's compare on the inner field.",
"methods": [
{
"name": "compare",
"body": {
"t": "lam",
"params": ["a", "b"],
"paramTypes": [
{ "k": "con", "name": "IntBox" },
{ "k": "con", "name": "IntBox" }
],
"retType": { "k": "con", "name": "prelude.Ordering" },
"body": {
"t": "match",
"scrutinee": { "t": "var", "name": "a" },
"arms": [{
"pat": { "p": "ctor", "ctor": "MkIntBox", "fields": [{ "p": "var", "name": "ai" }] },
"body": {
"t": "match",
"scrutinee": { "t": "var", "name": "b" },
"arms": [{
"pat": { "p": "ctor", "ctor": "MkIntBox", "fields": [{ "p": "var", "name": "bi" }] },
"body": {
"t": "app",
"fn": { "t": "var", "name": "compare" },
"args": [
{ "t": "var", "name": "ai" },
{ "t": "var", "name": "bi" }
]
}
}]
}
}]
}
}
}
]
},
{
"kind": "fn",
"name": "main",
"type": {
"k": "fn", "params": [], "ret": { "k": "con", "name": "Unit" },
"effects": ["IO"]
},
"params": [],
"body": {
"t": "seq",
"lhs": {
"t": "do", "op": "io/print_int",
"args": [{
"t": "if",
"cond": {
"t": "app",
"fn": { "t": "var", "name": "eq" },
"args": [
{
"t": "ctor", "type": "IntBox", "ctor": "MkIntBox",
"args": [{ "t": "lit", "lit": { "kind": "int", "value": 3 } }]
},
{
"t": "ctor", "type": "IntBox", "ctor": "MkIntBox",
"args": [{ "t": "lit", "lit": { "kind": "int", "value": 3 } }]
}
]
},
"then": { "t": "lit", "lit": { "kind": "int", "value": 1 } },
"else": { "t": "lit", "lit": { "kind": "int", "value": 0 } }
}]
},
"rhs": {
"t": "do", "op": "io/print_int",
"args": [{
"t": "if",
"cond": {
"t": "app",
"fn": { "t": "var", "name": "eq" },
"args": [
{
"t": "ctor", "type": "IntBox", "ctor": "MkIntBox",
"args": [{ "t": "lit", "lit": { "kind": "int", "value": 3 } }]
},
{
"t": "ctor", "type": "IntBox", "ctor": "MkIntBox",
"args": [{ "t": "lit", "lit": { "kind": "int", "value": 5 } }]
}
]
},
"then": { "t": "lit", "lit": { "kind": "int", "value": 1 } },
"else": { "t": "lit", "lit": { "kind": "int", "value": 0 } }
}]
}
}
}
]
}