I am seeking a TypeScript or ESLint rule that enforces the usage of return values from functions. For example:
const getNum = () => 12
This rule should allow me to call the function and store the returned value like this:
const a = getNum()
However, it should not permit calling the function without storing the return value:
getNum()
Currently, I am exploring libraries such as neverthrow or ts-results. In my experience, when I return a result
If you're searching for a rule that aligns with your requirements, consider looking into the no-unused-expressions guideline. From your inquiry, it appears that you are already familiar with this rule. The webpage offers insights into why it permits scenarios like getNum() standing alone; a function can both return a value and carry out additional actions. Outlawing the calling of functions without storing the outcome would lead to excessive code resembling:
const unused = callForSideEffects();
// unused is... unused
This approach proves to be inefficient (as it stores an unused value) and perplexing (why retain a value if it serves no purpose?)
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