e03c087e5a
Item 2 (Agra ruling): a compile-time INTEGRAL float (`4.0`, `N : f64 : 4.0`, `N :: 4.0`) used as an array dimension / Vector lane / generic value-param count / `inline for` bound now folds to its integer at the shared leaf — `program_index.floatToIntExact`, used by both the `.float_literal` arm of `evalConstIntExpr` and `moduleConstInt`. All four consumers route through the one evaluator, so `[4.0]s64` lays out the same `[4]s64` uniformly; a non-integral (`4.5`) or negative value stays rejected by the downstream `foldDimU32` gate. Pass-0 now pre-registers float-valued module consts for forward-alias parity with int consts. Item 1: a generic value-param bind (`Box($K: u32)`) never range-checked the folded arg, so `Box(5_000_000_000)` compiled and ran. The bind now range-checks against the param's declared type — a `u32` count through the shared `foldDimU32` gate (making program_index's "single u32 gate for value-param counts" doc true), any other integer type through the new `program_index.intTypeRange` — and emits a clean "value N does not fit in u32 parameter K" otherwise. The declared type is threaded via a new `TemplateParam.value_type`. Regressions: examples 0145 (integral-float array dim), 1504 (Vector lane), 0611 (inline-for bound), 0209 (value-param integral-float), 1132 (non-integral float dim rejected), 1133 (negative float dim rejected), 1134 (oversized u32 value-param rejected) + program_index float-fold unit tests. Gate: zig build, zig build test, 406/0 run_examples.
20 lines
873 B
Plaintext
20 lines
873 B
Plaintext
// A generic value parameter (`$K: u32`) binds a literal (`Vec(3, s64)`) and an
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// integral-float named const (`Vec(L, s64)` with `L : f64 : 4.0`) to the same
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// integer a plain `4` would — the value-param arg folds through the shared
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// const-int evaluator, so the integral-float rule (F0.4 attempt 8, Agra ruling)
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// reaches value params too. The folded value is the array length `[K]s64`.
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//
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// The bind is range-checked against the declared `u32` (an out-of-range arg is a
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// clean compile error — see 1134); a valid in-range value binds normally.
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#import "modules/std.sx";
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Vec :: struct ($K: u32, $T: Type) { data: [K]T; }
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L : f64 : 4.0;
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main :: () {
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a : Vec(3, s64) = ---; // literal value param
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b : Vec(L, s64) = ---; // integral-float named-const value param → 4
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print("a.len={} b.len={}\n", a.data.len, b.data.len); // 3 and 4
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}
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