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Suggestion about `transformers`

See original GitHub issue

Better to support array of transformer creators, not a one factory function.

import * as ts from 'typescript'

interface CustomTransformer {
    before?: ts.TransformerFactory<ts.SourceFile> | void
    after?: ts.TransformerFactory<ts.SourceFile> | void
}

type TransformerFactoryCreator = (ls: ts.LanguageService) => CustomTransformer

function createTransformers(creators: TransformerFactoryCreator[]): (program: ts.LanguageService) => ts.CustomTransformers {
    return (ls: ts.LanguageService) => {
        const result = {
            before: <ts.TransformerFactory<ts.SourceFile>[]>[],
            after: <ts.TransformerFactory<ts.SourceFile>[]>[]
        }
        for(let creator of creators) {
            const factory = creator(ls)
            if (factory.before) result.before.push(factory.before)
            if (factory.after) result.after.push(factory.after)
        }
        return result
    }
}

Issue Analytics

State:
Created 5 years ago
Reactions:1
Comments:7 (4 by maintainers)

Top GitHub Comments

1reaction

zerkalicacommented, May 4, 2018

Ok, last commit works

0reactions

ezolenkocommented, May 22, 2022

In 0.14.0 now

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