Allow JS multiple declarations of ctor properties#10123
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When a property is declared in the constructor and on the prototype of an ES6 class, the property's symbol is discarded in favour of the method's symbol. That because the usual use for this pattern is to bind an instance function: `this.m = this.m.bind(this)`. In this case the type you want really is the method's type.
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@RyanCavanaugh @weswigham mind taking a look? |
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Need a test that does this in the opposite order (with the constructor below the method declarations)
The extra `else` caused a ton of test failures!
src/compiler/types.ts
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| /* @internal */ exportSymbol?: Symbol; // Exported symbol associated with this symbol | ||
| /* @internal */ constEnumOnlyModule?: boolean; // True if module contains only const enums or other modules with only const enums | ||
| /* @internal */ isReferenced?: boolean; // True if the symbol is referenced elsewhere | ||
| /* @internal */ isDiscardable?: boolean; // True if a Javascript class property can be overwritten by a method |
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nit: could you name the property ? (e.g isMethodOverwritable etc.)
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done. I ended up with isReplaceableByMethod but tell if you want me to change it.
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@weswigham I just got a test timeout failure on one of the linux workers with |
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Grrr.... Being unable to predict starvation is a pain. For now, rerun the
build and I'll reduce worker count to 3.
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I like the new name 😸 |
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👍 |
Also simply it considerably after noticing that it's *only* called for Javascript files, so there was a lot of dead code for TS cases that never happened.
sandersn
deleted the
allow-js-multiple-declaration-of-constructor-properties
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Fixes #9880
When a property is declared in the constructor and on the prototype of an ES6 class, the property's symbol is discarded in favour of the method's symbol. That because the usual use for this pattern is to bind an instance function:
this.m = this.m.bind(this). In this case the type you want really is the method's type.