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Compress n+=1 to ++n #4267

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drathier opened this issue Nov 8, 2020 · 1 comment
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Compress n+=1 to ++n #4267

drathier opened this issue Nov 8, 2020 · 1 comment
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@drathier
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drathier commented Nov 8, 2020 •
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Feature request

Uglify version (uglifyjs -V)

Whichever version is live at http://lisperator.net/uglifyjs/compress

JavaScript input

n += 1

The uglifyjs CLI command executed or minify() options used.

Defaults at http://lisperator.net/uglifyjs/compress (or all flags enabled, doesn't matter)

JavaScript output or error produced.

n+=1

JavaScript expected output.

++n

Presumably the same should happen for n -= 1 too.
@drathier drathier changed the title Compress n+=1 to n++ Compress n+=1 to ++n Nov 8, 2020
@alexlamsl
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See #3280 (comment) why this is not always safe to do so.

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@alexlamsl @drathier