support 'regex' property when 'value' is null #396
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fabiosantoscode
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regex property of a Literal when value is null
fabiosantoscode
changed the title
regex property of a Literal when value is null
fabiosantoscode
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Sep 5, 2019
michaelficarra
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Jan 18, 2020
michaelficarra
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bizob2828
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Apr 2, 2020
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Hello there! Thank you very much for the work that's gone into this library :)
I come with a PR to fix an issue which came up while using escodegen to test Terser's mozilla AST generation.
According to the spec it's possible to set a
RegExpLiteral's value tonullsuch that the RegExp is fully defined in theregexproperty. We need to do this always in Terser since we print the estree serialized JSON to standard output, which is a medium that doesn't allow us to use actual regular expressions.To fix this, I just placed the logic that tests whether the Literal is a RegExpLiteral (IE checking for the regex property) above the other checks, which allows it to circumvent an early return of
'null'in this case.Thanks! :D