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fix(jsii): prohibit exported const enums #372

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merged 1 commit into from
Mar 7, 2019

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rix0rrr
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@rix0rrr rix0rrr commented Mar 7, 2019

'const enums' are inlined at the usage site by TypeScript and so the
generated type will not be in the JavaScript source code in the
assembly, even though the declaration will be there.

This leads to "symbol not found" errors upon trying to load it.

Ref: https://www.typescriptlang.org/docs/handbook/enums.html#const-enums
Related: aws/aws-cdk#1969

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

'const enums' are inlined at the usage site by TypeScript and so the
generated type will not be in the JavaScript source code in the
assembly, even though the declaration will be there.

This leads to "symbol not found" errors upon trying to load it.

https://www.typescriptlang.org/docs/handbook/enums.html#const-enums

Fixes aws/aws-cdk#1969
@rix0rrr rix0rrr requested a review from a team as a code owner March 7, 2019 08:25
this._diagnostic(decl,
ts.DiagnosticCategory.Error,
`Exported enum cannot be declared 'const'`);
}
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Should we return from there? So we don't include it in the .jsii assembly we'd create?

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No.

@RomainMuller RomainMuller merged commit 5a94825 into master Mar 7, 2019
@RomainMuller RomainMuller deleted the huijbers/no-const-enum branch March 7, 2019 08:37
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nice

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3 participants