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.
13 lines
500 B
Plaintext
13 lines
500 B
Plaintext
// A NEGATIVE integral float (`-2.0`) used as an array dimension is a hard error.
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// The integral-float rule folds and negates it to `-2`, then the shared u32 dim
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// gate rejects a below-minimum dimension — a clean diagnostic + non-zero exit.
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//
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// Regression (F0.4 attempt 8, Agra ruling): integral floats fold, but a negative
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// result is still rejected (a dimension must be non-negative).
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#import "modules/std.sx";
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main :: () {
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a : [-2.0]s64 = ---;
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print("unreachable: {}\n", a.len);
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}
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