TypeScript/tests/cases/conformance/jsdoc/constructorTagWithThisTag.ts

// @allowJs: true
// @noEmit: true
// @checkJs: true
// @Filename: classthisboth.js

/**
 * @class
 * @this {{ e: number, m: number }}
 * this-tag should win, both 'e' and 'm' should be defined.
 */
function C() {
    this.e = this.m + 1
}
Type `this` in more constructor functions (#39447) * Type `this` in more constructor functions Previously, `this: this` in constructor functions only when there was an explicit `@constructor` tag on the function. Now, `this: this` for any function that's known to be a constructor function. This improves completions inside constructor functions; also note that previously the compiler did type `this: this` inside methods of constructor functions, so this fix makes us more consistent. This is reflected in the large number of baselines that improve. The fix is a simple switch to `isJSConstructor`, which is the standard way to detect constructor functions. I'm not sure why the original PR didn't use this method. I remember discussing this limitation in the original bug, #25979, and I guess I decided that it made sense. But I was heavily primed by the bug's framing of the problem in terms of `noImplicitThis`, which should require an explicit `@constructor` tag. With better typing comes better detection of `@readonly` assignment; I had to fix the readonly detection code to use `isJSConstructor` as well. * Remove `Add @class tag` fix for noImplicitThis. The new rules mean that it never applies. It's possible that it should apply to functions like ```js function f() { this.init() } ``` In which `init` is never defined, but I think this program is incomplete enough that not offering the fix is fine. * Fix precedence of `@this` Previously, both `@class` and `@this` in a jsdoc would cause the `@this` annotation to be ignored. This became a worse problem with this PR, because `this` is correctly typed even without the annotation. This commit makes sure that `@this` is checked first and used if present. 2020-07-08 17:44:17 +02:00			`// @allowJs: true`
			`// @noEmit: true`
			`// @checkJs: true`
			`// @Filename: classthisboth.js`

			`/**`
			`* @class`
			`* @this {{ e: number, m: number }}`
			`* this-tag should win, both 'e' and 'm' should be defined.`
			`*/`
			`function C() {`
			`this.e = this.m + 1`
			`}`