b6d66d9c56
Completes issue 0095: a non-integral float→int narrowing via a FLOAT-const leaf (`F : f64 : 2.5; y : s64 = F + 0.25` = 2.75) silently truncated to 2. `evalConstFloatExpr` delegated only INTEGER leaves to `evalConstIntExpr` and had no float-const leaf arm, so the unified rule never saw the value. - program_index.zig: add `moduleConstFloat`/`moduleConstFloatFramed` — the f64 twin of `moduleConstInt` (same `isCountableConstType` gate, same cyclic- definition frame), recovering a numeric module const's value via `evalConstFloatExpr`. Add `lookupFloatName` to `ModuleConstCtx` and the `.identifier`/`.type_expr` leaf arms to `evalConstFloatExpr` that call it. Integer / integral-float leaves keep resolving through the existing `evalConstIntExpr` delegation, so the unified rule now applies to ANY compile-time-constant float expression — literal, int-const leaf, float-const leaf, and combinations — at every binding site. - lower.zig: add `Lowering.lookupFloatName` delegating to `moduleConstFloat`. Route `typedConstInitFits`' integral-fold check through `evalConstFloatExpr` + `floatToIntExact` (the SAME facility `foldComptimeFloatInit` uses) instead of the int-only `evalComptimeInt`, which folded leaf-by-leaf in i64 and so rejected an integral SUM built from a non-integral float leaf (`K : s64 : F + 1.5` = 4.0 now folds; `K : s64 : F + 0.25` errors). A LOCAL `::` const leaf is a scope ref (not in the const tables) so neither the int nor float evaluator folds it — float now matches int exactly there. Regression: examples/1146 (negative) + 0168 (positive) extended with float-const-leaf cases at local/field/param/const; unit test in program_index.test.zig covers the leaf resolution (F→2.5, F+0.25→2.75, F+1.5→4.0). specs.md + readme.md state the rule covers any compile-time-const float expression incl. float-typed const leaves. issues/0095 banner updated. Gate: zig build + zig build test green; 447 examples pass, 0 failed.
54 lines
2.6 KiB
Plaintext
54 lines
2.6 KiB
Plaintext
error: cannot implicitly narrow non-integral float '1.5' to 's64'; use an explicit cast (`xx`/`cast`)
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--> examples/1146-diagnostics-nonintegral-float-to-int.sx:34:16
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34 | y : s64 = 1.5; // non-integral float LITERAL local → error
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| ^^^
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error: cannot implicitly narrow non-integral float '2.5' to 's64'; use an explicit cast (`xx`/`cast`)
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--> examples/1146-diagnostics-nonintegral-float-to-int.sx:35:16
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35 | ye : s64 = M + 0.5; // non-integral int-const-EXPRESSION local → error
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| ^^^^^^^
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error: cannot implicitly narrow non-integral float '2.75' to 's64'; use an explicit cast (`xx`/`cast`)
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--> examples/1146-diagnostics-nonintegral-float-to-int.sx:36:16
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36 | yf : s64 = F + 0.25; // non-integral float-const-LEAF local → error
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| ^^^^^^^^
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error: cannot implicitly narrow non-integral float '3.5' to 's64'; use an explicit cast (`xx`/`cast`)
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--> examples/1146-diagnostics-nonintegral-float-to-int.sx:24:16
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24 | f : s64 = 3.5; // non-integral float LITERAL field default → error
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| ^^^
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error: cannot implicitly narrow non-integral float '2.5' to 's64'; use an explicit cast (`xx`/`cast`)
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--> examples/1146-diagnostics-nonintegral-float-to-int.sx:25:16
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25 | fe : s64 = M + 0.5; // non-integral int-const-EXPR field default → error
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| ^^^^^^^
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error: cannot implicitly narrow non-integral float '2.75' to 's64'; use an explicit cast (`xx`/`cast`)
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--> examples/1146-diagnostics-nonintegral-float-to-int.sx:26:16
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26 | ff : s64 = F + 0.25; // non-integral float-const-LEAF field default → error
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| ^^^^^^^^
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error: cannot implicitly narrow non-integral float '2.5' to 's64'; use an explicit cast (`xx`/`cast`)
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--> examples/1146-diagnostics-nonintegral-float-to-int.sx:29:23
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29 | badLit :: (x : s64 = 2.5) -> s64 { return x; } // non-integral LITERAL param default → error
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| ^^^
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error: cannot implicitly narrow non-integral float '2.5' to 's64'; use an explicit cast (`xx`/`cast`)
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--> examples/1146-diagnostics-nonintegral-float-to-int.sx:30:23
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30 | badExpr :: (x : s64 = M + 0.5) -> s64 { return x; } // non-integral int-const-EXPR param default → error
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| ^^^^^^^
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error: cannot implicitly narrow non-integral float '2.75' to 's64'; use an explicit cast (`xx`/`cast`)
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--> examples/1146-diagnostics-nonintegral-float-to-int.sx:31:23
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31 | badFlt :: (x : s64 = F + 0.25) -> s64 { return x; } // non-integral float-const-LEAF param default → error
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| ^^^^^^^^
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