mirror of
https://github.com/vercel-labs/scriptc.git
synced 2026-11-01 07:33:12 +08:00
Chris Tate
a711d74ecf
- A binding that a local class captures counts as written: the class's methods may assign it while the loop runs, so the call keeps its helper. - Copied bodies rename the labels of switch and for-of statements and the binding of for-of loops. - The known-union and record-temporary cleanups rewrite switch cases and for-of bodies, where they left declarations of removed locals. - Copied locals keep their source bindings. In programs that write contract types, a parameter with a source binding keeps its own local, so an Int32 parameter is checked against the elements the loop passes.
39 lines
776 B
TypeScript
39 lines
776 B
TypeScript
// Int32 contracts that do not hold: each write that is not an int32 by
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// construction is reported with the expression and the `| 0` fix.
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import type { Int32 } from "@scriptc/types";
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class Span {
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pos: Int32 = 0;
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end: Int32 = 0;
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readonly id: Int32;
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constructor(id: number) {
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this.id = id;
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}
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advance(): void {
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this.pos++;
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}
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}
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function width(span: Span): Int32 {
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return span.end - span.pos;
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}
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function half(x: Int32): Int32 {
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return x / 2;
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}
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let count: Int32 = 0;
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function bump(): void {
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count += 1;
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}
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const sizes = [1, 2, 3];
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const len: Int32 = sizes.length;
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const weights = [1.5, 2];
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const shifted = weights.map((w: Int32) => w + 1);
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const span = new Span(1.5);
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span.advance();
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bump();
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console.log(width(span), half(7), count, len, shifted);
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