Strict mode

[victorsand]

Hi, friends!

It seems like Emscripten does not output strict mode compatible code (testing test/hello_world.cpp etc). Is this correct and if so, are there ways to compile to strict mode compatible code?

I dug around in the src and it seems like commented "use strict" directives started showing up in some files, for example in the commit https://github.com/kripken/emscripten/blob/d2b0d9924aa9a3603b0b16bd957832faf503c32d/src/compiler.js (various fixes from js strict mode testing).

Thanks,
Victor

[ngld]

AFAIK it's not possible to generate strict mode compatible code because the framework used during runtime isn't strict mode compatible. (i.e. it uses octal literals)
The file you referenced isn't compiled code but part of the compiler. The directive is commented out because even that file isn't strict mode safe; it uses if() statements to declare functions depending on whether it's run using node.js, as part of a website, in a web worker or a js shell.
It's not possible to generate strict mode compatible code with emscripten without putting a considerable effort into rewriting relevant parts of the compiler.

[victorsand]

Thanks for your answer, ngld!

[ngld]

You're welcome. =)

[kripken]

I also think it would take some work, but I am not sure how much. Would be interesting if someone tried.

[VirtualTim]

(i.e. it uses octal literals)
Octal literals are now allowed in strict mode (with 0o prefix).

[stale]

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