closure-compiler

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command java -jar closure-compiler.jar --compilation_level ADVANCED_OPTIMIZATIONS --formatting PRETTY_PRINT --js input.js --js_output_file compiled.js

the example code is trimmed from tc39 stage 3 decorator compiled by swc. in the example,@pureOrBreakMyCode is added manually to ({ e: [_init_p3] } = /** @pureOrBreakMyCode */_apply_decs_2203_r(...)

however, because left-hand side is destructuring assignment, so closure-compiler need to traverse the lhs and valueNode respectively, it can't eliminate the pure valueNode.

reproducible code

/** @noinline */
const applyDecs2203RFactory = () => { return () => {} }
/** @noinline */
const _apply_decs_2203_r = applyDecs2203RFactory()
var _init_p3;

class A {
    constructor(){
        this.p3 = /** @pureOrBreakMyCode */_init_p3(this, "3");
    }
}
({ e: [_init_p3] } = /** @pureOrBreakMyCode */_apply_decs_2203_r(1, 2, 3));