Brummel
3286117605
Ships class Show a where show : (a borrow) -> Str in the prelude
plus primitive Show Int / Bool / Str / Float instances. Each
instance body is a single-application lambda invoking the
corresponding runtime primitive (int_to_str, bool_to_str,
str_clone, float_to_str) — first prelude instance bodies to call
runtime primitives directly. Float is included in Show (unlike
Eq/Ord) because textual representation is well-defined modulo the
NaN-spelling caveat at DESIGN.md §Float semantics.
The 22b typeclass test corpus is migrated preemptively: 21 fixture
files and 6 consumer files (typeclass_22b{2,3}.rs +
hash.rs ct4 pin + workspace.rs iter22b1 tests + the
instance_present.prose.txt snapshot) rename class Show / show
to class TShow / tshow, analogous to the existing TEq/TOrd
convention. Migration runs before the prelude additions so the
workspace stays green throughout.
Three new tests pin the post-mono shape: show_mono_synthesis.rs
(existence of show__Int/Bool/Str/Float as Def::Fn entries in the
prelude post-mono module), show_dispatch_pin.rs (bare show and
tshow both Step-2 singletons workspace-globally),
mono_hash_stability.rs::primitive_show_mono_symbol_hashes_stay_bit_identical
(body hashes pinned for the 4 new mono symbols).
DESIGN.md §Prelude (built-in) classes drops Show from the
deferred-features list and appends a milestone-24 paragraph
naming the class signature + the 4 instances + the body shape.
print rewire stays deferred to iter 24.3.
Tests: 552 passed (was 548 + 4 new). bench/compile_check +
bench/cross_lang exit 0. bench/check exits 1 on the recurring
noise envelope per the conservative-call lineage.
43 lines
1.4 KiB
Rust
43 lines
1.4 KiB
Rust
//! Mono-synthesis existence pin for milestone 24.2's Show class.
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//!
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//! Asserts that the four primitive Show instances (Int/Bool/Str/Float)
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//! cause the mono pass to synthesise `show__Int`, `show__Bool`,
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//! `show__Str`, `show__Float` as `Def::Fn` entries in the prelude
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//! post-mono module.
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use ailang_core::ast::Def;
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use ailang_core::workspace::load_workspace;
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use ailang_check::{check_workspace, monomorphise_workspace};
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use std::path::PathBuf;
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fn fixture_path() -> PathBuf {
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let mut d = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
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d.pop();
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d.pop();
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d.join("examples").join("show_mono_pin_smoke.ail.json")
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}
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#[test]
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fn primitive_show_mono_symbols_synthesise() {
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let ws = load_workspace(&fixture_path()).expect("workspace loads");
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let diags = check_workspace(&ws);
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assert!(diags.is_empty(), "typecheck diagnostics: {diags:#?}");
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let post_mono = monomorphise_workspace(&ws).expect("mono green");
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let prelude_mod = post_mono
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.modules
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.get("prelude")
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.expect("prelude module present");
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for sym in &["show__Int", "show__Bool", "show__Str", "show__Float"] {
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let found = prelude_mod
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.defs
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.iter()
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.any(|d| matches!(d, Def::Fn(f) if f.name == *sym));
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assert!(
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found,
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"mono symbol {sym} not found in prelude module post-mono"
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);
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}
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}
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