Better display representation for intersection types · Microsoft/TypeScript#7705

2016-03-27T15:16:46.000Z

I'm not sure if this has been discussed before, but join types are mostly unreadable. I think the type should be prettified somehow before being displayed to the user. **TypeScript Version:** 1.8 **Code** ``` ts type T1 = {}; type T2 = {test: number}; type J = T1 & T2; ``` **Expected behavior:** ``` ts var x: J; typeof x; // {test: number} ``` **Actual behavior:** ``` ts var x: J; typeof x; // {} & {test: number} ```

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説明

I'm not sure if this has been discussed before, but join types are mostly unreadable. I think the type should be prettified somehow before being displayed to the user.

TypeScript Version:

1.8

Code

type T1 = {};
type T2 = {test: number};
type J = T1 & T2;

Expected behavior:

var x: J;
typeof x; // {test: number}

Actual behavior:

var x: J;
typeof x; // {} & {test: number}

コントリビューターガイド

技術スタック: typescript
領域: developer experience
Issue 種別: feature
難度: 4
推定時間: 1-2 days
活動状況: stale
明確さ: mostly clear
前提条件: Understand intersection typesFamiliarity with TypeScript source codeKnowledge of type printerSetup dev environment
初心者向け度: 40
調査方針: Read the issue discussion to understand the desired behavior. Explore the TypeScript compiler source code, particularly files related to type printing (e.g., src/compiler/checker.ts). Identify where intersection types are currently formatted and consider adding simplification logic to flatten and merge intersection members. Also review existing test suites for type formatting to ensure no regressions.