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enhance collapse_vars (#3697)

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This commit is contained in:
Alex Lam S.L
2020-01-29 08:52:20 +08:00
committed by GitHub
parent 87119e44a0
commit 2ba5f391e0
2 changed files with 195 additions and 1 deletions
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29
lib/compress.js
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@@ -1382,7 +1382,34 @@ merge(Compressor.prototype, {
}
function is_last_node(node, parent) {
if (node instanceof AST_Call) return true;
if (node instanceof AST_Call) {
var fn = node.expression;
if (fn instanceof AST_SymbolRef) fn = fn.fixed_value();
if (!(fn instanceof AST_Lambda)) return true;
if (fn.collapse_scanning) return false;
fn.collapse_scanning = true;
var replace = can_replace;
can_replace = false;
var after = stop_after;
var if_hit = stop_if_hit;
var rhs_fn = scan_rhs;
for (var i = 0; !abort && i < fn.body.length; i++) {
var stat = fn.body[i];
if (stat instanceof AST_Exit) {
if (stat.value) stat.value.transform(scanner);
break;
}
stat.transform(scanner);
}
scan_rhs = rhs_fn;
stop_if_hit = if_hit;
stop_after = after;
can_replace = replace;
delete fn.collapse_scanning;
if (!abort) return false;
abort = false;
return true;
}
if (node instanceof AST_Exit) {
if (in_try) {
if (in_try.bfinally) return true;