Explain more why pragma is the best fit

tc39 / proposal-function-implementation-hiding

JavaScript language proposal: function implementation hiding

https://ci.tc39.es/preview/tc39/ecma262/pull/1739

MIT License

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Explain more why pragma is the best fit #9

Closed domenic closed 5 years ago

domenic commented 6 years ago

@erights, @mikesamuel, and @waldemarhorwat all had points I will try to jot down:

Pragmas offer a unique syntactic space in that they are lexical and they are backward-compatible
Tooling (e.g. an inliner) that wants to treat censored functions differently requires lexical source code information, not runtime information. (Compare to .censor() alternative.)
... I forget Waldemar's point :(

mikesamuel commented 6 years ago

I would like to avoid inliners having to use heuristics to decide whether they can inline a call to a potentially censored function into a potentially uncensored function's body.