Autocompletion of Template Literal Types with unresolved types.

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**Extension**: Typescript Language Features
**Feature**: Autocompletion of Template Literal Types with unresolved types.

Hi,

Currently the autocompletion for template literal types stops working as soon as an ambiguous type is used in the template, like number or string.



My idea is, that instead of proposing nothing at all, the autocompletion feature can be extended to propose a snippet with a template literal string and tabstops for the parameters or alternatively a normal string. String unions could be replaced with choices. The end result after selecting the completion would look like something like that:


This could be for example helpful with APIs that typed their Ressource pathes using parametrized template literals.

从 TypeScript Language Features 扩展开始，重现报告中描述的模板字面量补全案例。比较未解析类型的行为，然后明确补全应生成带有制表位的代码片段、普通字符串还是联合类型选项；当所选补全在这些案例中的行为保持一致时，即视为完成。

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