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This change modifies the checker and the emitter to support the use of decorators when targeting ES3. In addition to removing the ES5-specific use of
reduceRight
from the__decorate
helper, this change also inlines the calls toObject.getOwnPropertyDescriptor
andObject.defineProperty
in a backwards-compatible fashion that allows us to clean up the emit for ES5 and later by removing various repetitive calls to the aforementionedObject
methods.Addresses #4681.