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workaround quirks on latter specs (#4172)

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closes #4171
This commit is contained in:
Alex Lam S.L
2020-10-03 11:27:17 +01:00
committed by GitHub
parent 8cb509d50e
commit 142bd1bd1a
2 changed files with 77 additions and 2 deletions
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11
lib/compress.js
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@@ -4851,8 +4851,8 @@ merge(Compressor.prototype, {
&& (old_def.name == def.name.name || all(old_def.references, function(ref) {
return ref.scope.find_variable(def.name) === def.name.definition();
})))
&& can_rename(def.value, def.name.name)
&& (!compressor.has_directive("use strict") || parent instanceof AST_Scope)) {
&& can_declare_defun()
&& can_rename(def.value, def.name.name)) {
AST_Node.warn("Declaring {name} as function [{file}:{line},{col}]", template(def.name));
var defun = make_node(AST_Defun, def, def.value);
defun.name = make_node(AST_SymbolDefun, def.name, def.name);
@@ -4908,6 +4908,13 @@ merge(Compressor.prototype, {
var def = fn.variables.get(name);
return !def || fn.name && def === fn.name.definition();
}
function can_declare_defun() {
if (compressor.has_directive("use strict")) return parent instanceof AST_Scope;
return parent instanceof AST_Block
|| parent instanceof AST_For && parent.init === node
|| parent instanceof AST_If;
}
});
switch (head.length) {
case 0: