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fix: avoid downleveled dynamic import closing over specifier expressi…
…on (#49663) * fix: evaluate dynamic import specifier expressions synchronously * refactor * Update src/compiler/transformers/module/module.ts Co-authored-by: Ron Buckton <ron.buckton@microsoft.com> * [Experiment] Co-authored-by: Ron Buckton <ron.buckton@microsoft.com>
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31 changes: 31 additions & 0 deletions
31
tests/baselines/reference/dynamicImportEvaluateSpecifier.js
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//// [dynamicImportEvaluateSpecifier.ts] | ||
// https://github.com/microsoft/TypeScript/issues/48285 | ||
let i = 0; | ||
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import(String(i++)); | ||
import(String(i++)); | ||
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const getPath = async () => { | ||
/* in reality this would do some async FS operation, or a web request */ | ||
return "/root/my/cool/path"; | ||
}; | ||
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const someFunction = async () => { | ||
const result = await import(await getPath()); | ||
}; | ||
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//// [dynamicImportEvaluateSpecifier.js] | ||
var _a, _b; | ||
// https://github.com/microsoft/TypeScript/issues/48285 | ||
let i = 0; | ||
_a = String(i++), Promise.resolve().then(() => require(_a)); | ||
_b = String(i++), Promise.resolve().then(() => require(_b)); | ||
const getPath = async () => { | ||
/* in reality this would do some async FS operation, or a web request */ | ||
return "/root/my/cool/path"; | ||
}; | ||
const someFunction = async () => { | ||
var _a; | ||
const result = await (_a = await getPath(), Promise.resolve().then(() => require(_a))); | ||
}; |
29 changes: 29 additions & 0 deletions
29
tests/baselines/reference/dynamicImportEvaluateSpecifier.symbols
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=== tests/cases/compiler/dynamicImportEvaluateSpecifier.ts === | ||
// https://github.com/microsoft/TypeScript/issues/48285 | ||
let i = 0; | ||
>i : Symbol(i, Decl(dynamicImportEvaluateSpecifier.ts, 1, 3)) | ||
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import(String(i++)); | ||
>String : Symbol(String, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2015.core.d.ts, --, --), Decl(lib.es2015.iterable.d.ts, --, --) ... and 3 more) | ||
>i : Symbol(i, Decl(dynamicImportEvaluateSpecifier.ts, 1, 3)) | ||
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import(String(i++)); | ||
>String : Symbol(String, Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es5.d.ts, --, --), Decl(lib.es2015.core.d.ts, --, --), Decl(lib.es2015.iterable.d.ts, --, --) ... and 3 more) | ||
>i : Symbol(i, Decl(dynamicImportEvaluateSpecifier.ts, 1, 3)) | ||
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const getPath = async () => { | ||
>getPath : Symbol(getPath, Decl(dynamicImportEvaluateSpecifier.ts, 6, 5)) | ||
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/* in reality this would do some async FS operation, or a web request */ | ||
return "/root/my/cool/path"; | ||
}; | ||
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const someFunction = async () => { | ||
>someFunction : Symbol(someFunction, Decl(dynamicImportEvaluateSpecifier.ts, 11, 5)) | ||
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const result = await import(await getPath()); | ||
>result : Symbol(result, Decl(dynamicImportEvaluateSpecifier.ts, 12, 6)) | ||
>getPath : Symbol(getPath, Decl(dynamicImportEvaluateSpecifier.ts, 6, 5)) | ||
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}; | ||
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44 changes: 44 additions & 0 deletions
44
tests/baselines/reference/dynamicImportEvaluateSpecifier.types
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=== tests/cases/compiler/dynamicImportEvaluateSpecifier.ts === | ||
// https://github.com/microsoft/TypeScript/issues/48285 | ||
let i = 0; | ||
>i : number | ||
>0 : 0 | ||
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import(String(i++)); | ||
>import(String(i++)) : Promise<any> | ||
>String(i++) : string | ||
>String : StringConstructor | ||
>i++ : number | ||
>i : number | ||
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import(String(i++)); | ||
>import(String(i++)) : Promise<any> | ||
>String(i++) : string | ||
>String : StringConstructor | ||
>i++ : number | ||
>i : number | ||
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const getPath = async () => { | ||
>getPath : () => Promise<string> | ||
>async () => { /* in reality this would do some async FS operation, or a web request */ return "/root/my/cool/path";} : () => Promise<string> | ||
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/* in reality this would do some async FS operation, or a web request */ | ||
return "/root/my/cool/path"; | ||
>"/root/my/cool/path" : "/root/my/cool/path" | ||
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}; | ||
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const someFunction = async () => { | ||
>someFunction : () => Promise<void> | ||
>async () => { const result = await import(await getPath());} : () => Promise<void> | ||
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const result = await import(await getPath()); | ||
>result : any | ||
>await import(await getPath()) : any | ||
>import(await getPath()) : Promise<any> | ||
>await getPath() : string | ||
>getPath() : Promise<string> | ||
>getPath : () => Promise<string> | ||
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}; | ||
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Original file line number | Diff line number | Diff line change |
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// @lib: es2019 | ||
// @target: es2019 | ||
// @module: commonjs | ||
// https://github.com/microsoft/TypeScript/issues/48285 | ||
let i = 0; | ||
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import(String(i++)); | ||
import(String(i++)); | ||
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const getPath = async () => { | ||
/* in reality this would do some async FS operation, or a web request */ | ||
return "/root/my/cool/path"; | ||
}; | ||
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const someFunction = async () => { | ||
const result = await import(await getPath()); | ||
}; |