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enhance collapse_vars (#4637)

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Alex Lam S.L 2021-02-10 15:06:12 +00:00 committed by GitHub
parent c6e287331d
commit f5659f292b
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1 changed files with 4 additions and 0 deletions
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lib/compress.js
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@ -2170,6 +2170,8 @@ merge(Compressor.prototype, {
}
}
if (expr.value) extract_candidates(expr.value);
} else if (expr instanceof AST_Yield) {
if (expr.expression) extract_candidates(expr.expression);
}
hit_stack.pop();
}
@ -2197,6 +2199,7 @@ merge(Compressor.prototype, {
if (parent instanceof AST_Switch) return node;
if (parent instanceof AST_Unary) return node;
if (parent instanceof AST_VarDef) return node;
if (parent instanceof AST_Yield) return node;
return null;
}
@ -2307,6 +2310,7 @@ merge(Compressor.prototype, {
if (parent instanceof AST_Switch) return find_stop_unused(parent, level + 1);
if (parent instanceof AST_Unary) return find_stop_unused(parent, level + 1);
if (parent instanceof AST_VarDef) return check_assignment(parent.name);
if (parent instanceof AST_Yield) return node;
return null;
function check_assignment(lhs) {