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simplify traversal logic (#4063)

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This commit is contained in:
Alex Lam S.L
2020-08-23 05:45:35 +08:00
committed by GitHub
parent f2d486e771
commit 35fe1092d3
2 changed files with 21 additions and 17 deletions
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26
lib/scope.js
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@@ -559,21 +559,23 @@ AST_Toplevel.DEFMETHOD("compute_char_frequency", function(options) {
options = _default_mangler_options(options);
base54.reset();
try {
AST_Node.prototype.print = function(stream, force_parens) {
this._print(stream, force_parens);
if (this instanceof AST_Symbol && !this.unmangleable(options)) {
base54.consider(this.name, -1);
} else if (options.properties) {
if (this instanceof AST_Dot) {
base54.consider(this.property, -1);
} else if (this instanceof AST_Sub) {
skip_string(this.property);
}
}
var fn = AST_Symbol.prototype.add_source_map;
AST_Symbol.prototype.add_source_map = function() {
if (!this.unmangleable(options)) base54.consider(this.name, -1);
};
if (options.properties) {
AST_Dot.prototype.add_source_map = function() {
base54.consider(this.property, -1);
};
AST_Sub.prototype.add_source_map = function() {
skip_string(this.property);
};
}
base54.consider(this.print_to_string(), 1);
} finally {
AST_Node.prototype.print = AST_Node.prototype._print;
AST_Symbol.prototype.add_source_map = fn;
delete AST_Dot.prototype.add_source_map;
delete AST_Sub.prototype.add_source_map;
}
base54.sort();