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https://github.com/vercel-labs/scriptc.git
synced 2026-10-21 05:50:55 +08:00
Chris Tate
a8bc0f6abf
- Avoid materializing scalar string slices and preserve index metadata. - Specialize known callbacks and numeric call boundaries. - Lower proved integer remainders without changing number semantics.
27 lines
1.3 KiB
TypeScript
27 lines
1.3 KiB
TypeScript
function invoke(fn:(n:number)=>number, n:number):number { return fn(n); }
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function closed(fn:(n:number)=>number, n:number):number { return fn(n)+fn(n+1); }
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const twice = (n:number):number => n*2;
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function triple(n:number):number { return n*3; }
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console.log(closed(twice,3),closed(twice,7));
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console.log(invoke(twice,4),invoke(triple,4));
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let mutable=twice;
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console.log(invoke(mutable,5));
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mutable=triple;
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console.log(invoke(mutable,5));
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function captured(offset:number):(n:number)=>number { return n=>n+offset; }
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const first=captured(10), second=captured(20);
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console.log(invoke(first,1),invoke(second,1));
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function recursive(fn:(n:number)=>number,n:number):number { return n===0 ? fn(n) : recursive(fn,n-1)+fn(n); }
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console.log(recursive(twice,4));
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const escaped=closed;
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console.log(escaped(triple,2));
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function fail(n:number):number { if(n===2)throw new Error("stop"); return n; }
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try { console.log(invoke(fail,2)); } catch(e) { console.log((e as Error).message); }
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interface Reader { base:number; read(n:number):number; }
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const receiver:Reader={base:8, read(n:number):number { return this.base+n; }};
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console.log(receiver.read(3));
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const order:string[]=[];
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function select():(n:number)=>number { order.push("callee"); return twice; }
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function argument():number { order.push("argument"); return 9; }
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console.log(select()(argument()),order.join(","));
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