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implement keep_fargs for mangle (#5307)

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closes #4657
This commit is contained in:
Alex Lam S.L
2022-01-20 21:13:26 +00:00
committed by GitHub
parent efed55f42d
commit e24b255350
20 changed files with 507 additions and 267 deletions
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34
lib/scope.js
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@@ -92,15 +92,19 @@ SymbolDef.prototype = {
if (def && def !== self) return def.redefined() || def;
},
unmangleable: function(options) {
return this.global && !options.toplevel
|| this.exported
|| this.undeclared
|| !options.eval && this.scope.pinned()
|| options.keep_fnames
&& (this.orig[0] instanceof AST_SymbolClass
|| this.orig[0] instanceof AST_SymbolDefClass
|| this.orig[0] instanceof AST_SymbolDefun
|| this.orig[0] instanceof AST_SymbolLambda);
if (this.exported) return true;
if (this.undeclared) return true;
if (!options.eval && this.scope.pinned()) return true;
if (options.keep_fargs && is_funarg(this)) return true;
if (options.keep_fnames) {
var sym = this.orig[0];
if (sym instanceof AST_SymbolClass) return true;
if (sym instanceof AST_SymbolDefClass) return true;
if (sym instanceof AST_SymbolDefun) return true;
if (sym instanceof AST_SymbolLambda) return true;
}
if (!options.toplevel && this.global) return true;
return false;
},
};
@@ -113,6 +117,10 @@ DEF_BITPROPS(SymbolDef, [
"undeclared",
]);
function is_funarg(def) {
return def.orig[0] instanceof AST_SymbolFunarg || def.orig[1] instanceof AST_SymbolFunarg;
}
var unary_side_effects = makePredicate("delete ++ --");
function is_lhs(node, parent) {
@@ -473,8 +481,11 @@ AST_Symbol.DEFMETHOD("mark_enclosed", function(options) {
push_uniq(s.enclosed, def);
if (!options) {
s._var_names = undefined;
} else if (options.keep_fnames) {
s.functions.each(function(d) {
} else {
if (options.keep_fargs && s instanceof AST_Lambda) s.each_argname(function(arg) {
push_uniq(def.scope.enclosed, arg.definition());
});
if (options.keep_fnames) s.functions.each(function(d) {
push_uniq(def.scope.enclosed, d);
});
}
@@ -579,6 +590,7 @@ function _default_mangler_options(options) {
options = defaults(options, {
eval : false,
ie : false,
keep_fargs : false,
keep_fnames : false,
reserved : [],
toplevel : false,