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Implicit const parameters #10357
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Implicit const parameters #10357
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65 changes: 65 additions & 0 deletions
65
tests/baselines/reference/implicitConstParameters.errors.txt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,65 @@ | ||
| tests/cases/compiler/implicitConstParameters.ts(39,27): error TS2532: Object is possibly 'undefined'. | ||
| tests/cases/compiler/implicitConstParameters.ts(45,27): error TS2532: Object is possibly 'undefined'. | ||
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| ==== tests/cases/compiler/implicitConstParameters.ts (2 errors) ==== | ||
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| function doSomething(cb: () => void) { | ||
| cb(); | ||
| } | ||
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| function fn(x: number | string) { | ||
| if (typeof x === 'number') { | ||
| doSomething(() => x.toFixed()); | ||
| } | ||
| } | ||
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| function f1(x: string | undefined) { | ||
| if (!x) { | ||
| return; | ||
| } | ||
| doSomething(() => x.length); | ||
| } | ||
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| function f2(x: string | undefined) { | ||
| if (x) { | ||
| doSomething(() => { | ||
| doSomething(() => x.length); | ||
| }); | ||
| } | ||
| } | ||
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| function f3(x: string | undefined) { | ||
| inner(); | ||
| function inner() { | ||
| if (x) { | ||
| doSomething(() => x.length); | ||
| } | ||
| } | ||
| } | ||
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| function f4(x: string | undefined) { | ||
| x = "abc"; // causes x to be considered non-const | ||
| if (x) { | ||
| doSomething(() => x.length); | ||
| ~ | ||
| !!! error TS2532: Object is possibly 'undefined'. | ||
| } | ||
| } | ||
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| function f5(x: string | undefined) { | ||
| if (x) { | ||
| doSomething(() => x.length); | ||
| ~ | ||
| !!! error TS2532: Object is possibly 'undefined'. | ||
| } | ||
| x = "abc"; // causes x to be considered non-const | ||
| } | ||
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| function f6(x: string | undefined) { | ||
| const y = x || ""; | ||
| if (x) { | ||
| doSomething(() => y.length); | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,106 @@ | ||
| //// [implicitConstParameters.ts] | ||
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| function doSomething(cb: () => void) { | ||
| cb(); | ||
| } | ||
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| function fn(x: number | string) { | ||
| if (typeof x === 'number') { | ||
| doSomething(() => x.toFixed()); | ||
| } | ||
| } | ||
|
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| function f1(x: string | undefined) { | ||
| if (!x) { | ||
| return; | ||
| } | ||
| doSomething(() => x.length); | ||
| } | ||
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| function f2(x: string | undefined) { | ||
| if (x) { | ||
| doSomething(() => { | ||
| doSomething(() => x.length); | ||
| }); | ||
| } | ||
| } | ||
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| function f3(x: string | undefined) { | ||
| inner(); | ||
| function inner() { | ||
| if (x) { | ||
| doSomething(() => x.length); | ||
| } | ||
| } | ||
| } | ||
|
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| function f4(x: string | undefined) { | ||
| x = "abc"; // causes x to be considered non-const | ||
| if (x) { | ||
| doSomething(() => x.length); | ||
| } | ||
| } | ||
|
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| function f5(x: string | undefined) { | ||
| if (x) { | ||
| doSomething(() => x.length); | ||
| } | ||
| x = "abc"; // causes x to be considered non-const | ||
| } | ||
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| function f6(x: string | undefined) { | ||
| const y = x || ""; | ||
| if (x) { | ||
| doSomething(() => y.length); | ||
| } | ||
| } | ||
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| //// [implicitConstParameters.js] | ||
| function doSomething(cb) { | ||
| cb(); | ||
| } | ||
| function fn(x) { | ||
| if (typeof x === 'number') { | ||
| doSomething(function () { return x.toFixed(); }); | ||
| } | ||
| } | ||
| function f1(x) { | ||
| if (!x) { | ||
| return; | ||
| } | ||
| doSomething(function () { return x.length; }); | ||
| } | ||
| function f2(x) { | ||
| if (x) { | ||
| doSomething(function () { | ||
| doSomething(function () { return x.length; }); | ||
| }); | ||
| } | ||
| } | ||
| function f3(x) { | ||
| inner(); | ||
| function inner() { | ||
| if (x) { | ||
| doSomething(function () { return x.length; }); | ||
| } | ||
| } | ||
| } | ||
| function f4(x) { | ||
| x = "abc"; // causes x to be considered non-const | ||
| if (x) { | ||
| doSomething(function () { return x.length; }); | ||
| } | ||
| } | ||
| function f5(x) { | ||
| if (x) { | ||
| doSomething(function () { return x.length; }); | ||
| } | ||
| x = "abc"; // causes x to be considered non-const | ||
| } | ||
| function f6(x) { | ||
| var y = x || ""; | ||
| if (x) { | ||
| doSomething(function () { return y.length; }); | ||
| } | ||
| } |
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Clarify that this flag is only set for parameters