463557990f
Finish NL.2 on top of the WIP compiler impl (2e9e4fe): f32/f64 expose
.min/.max plus the float-only .epsilon/.min_positive/.true_min/.inf/.nan,
folded via the shared lowerNumericLimit intercept + builder.constFloat.
- examples/0159: pins every f32/f64 accessor by untagged-union bit
reinterpret against exact IEEE-754 hex (true_min read before any
arithmetic — FTZ/DAZ), plus the defining-property checks
((1+eps)!=1 / (1+eps/2)==1, inf>max, min==-max, true_min<min_positive,
true_min>0, nan!=nan).
- examples/0160: float-only accessor on an int (s32.epsilon/u8.inf/
s64.true_min) and any accessor on a non-numeric type compile-error
cleanly (exit 1, pinned stderr).
- type_resolver.test.zig: floatLimitFor bit-pattern + property tests for
f32/f64, isLimitField coverage, null for non-float/non-limit fields.
- specs.md Numeric Limits: float accessors + the min=-max / min_positive=
smallest-normal / epsilon=ULP-of-1.0 / true_min=smallest-subnormal
clarifications, with the mandatory FTZ/DAZ flush-to-zero caveat.
readme.md overview updated.
28 lines
1.2 KiB
Plaintext
28 lines
1.2 KiB
Plaintext
// Cross-type rules for the numeric-limit accessors. `.min` / `.max` are valid on
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// BOTH integer and float types, but `.epsilon` / `.min_positive` / `.true_min` /
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// `.inf` / `.nan` are FLOAT-ONLY. Applying a float-only accessor to an INTEGER
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// type, or ANY accessor to a non-numeric type, is a clean compile error — never
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// a silent value, never the `.unresolved` sentinel reaching codegen.
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//
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// - float-only accessor on an integer (`s32.epsilon`, `u8.inf`,
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// `s64.true_min`) → a dedicated "applies only to float types" diagnostic
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// from the accessor intercept, located at the access;
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// - any accessor on a non-numeric builtin (`bool.nan`, `string.max`) → the
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// "numeric limits apply only to integer and float types" diagnostic;
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// - a user struct (`MyStruct.epsilon`) → the type name is not a builtin, so the
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// intercept stays out and the existing field-not-found path reports it.
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// Each case is accurate and located at the access; the program exits non-zero.
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#import "modules/std.sx";
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MyStruct :: struct { a: s64; }
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main :: () -> s32 {
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a := s32.epsilon;
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b := u8.inf;
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c := s64.true_min;
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d := bool.nan;
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e := string.max;
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f := MyStruct.epsilon;
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return 0;
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}
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