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fix corner case in conditionals (#4624)

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fixes #4623
This commit is contained in:
Alex Lam S.L
2021-02-08 10:31:08 +00:00
committed by GitHub
parent fd4caf7a9c
commit 357d861246
2 changed files with 34 additions and 28 deletions
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47
lib/compress.js
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@@ -4466,34 +4466,6 @@ merge(Compressor.prototype, {
def(AST_Statement, function() {
throw new Error("Cannot negate a statement");
});
def(AST_Arrow, function() {
return basic_negation(this);
});
def(AST_AsyncArrow, function() {
return basic_negation(this);
});
def(AST_AsyncFunction, function() {
return basic_negation(this);
});
def(AST_Function, function() {
return basic_negation(this);
});
def(AST_UnaryPrefix, function() {
if (this.operator == "!")
return this.expression;
return basic_negation(this);
});
def(AST_Sequence, function(compressor) {
var expressions = this.expressions.slice();
expressions.push(expressions.pop().negate(compressor));
return make_sequence(this, expressions);
});
def(AST_Conditional, function(compressor, first_in_statement) {
var self = this.clone();
self.consequent = self.consequent.negate(compressor);
self.alternative = self.alternative.negate(compressor);
return best(this, self, first_in_statement);
});
def(AST_Binary, function(compressor, first_in_statement) {
var self = this.clone(), op = this.operator;
if (compressor.option("unsafe_comps")) {
@@ -4522,6 +4494,25 @@ merge(Compressor.prototype, {
}
return basic_negation(this);
});
def(AST_Conditional, function(compressor, first_in_statement) {
var self = this.clone();
self.consequent = self.consequent.negate(compressor);
self.alternative = self.alternative.negate(compressor);
return best(this, self, first_in_statement);
});
def(AST_LambdaExpression, function() {
return basic_negation(this);
});
def(AST_Sequence, function(compressor) {
var expressions = this.expressions.slice();
expressions.push(expressions.pop().negate(compressor));
return make_sequence(this, expressions);
});
def(AST_UnaryPrefix, function() {
if (this.operator == "!")
return this.expression;
return basic_negation(this);
});
})(function(node, func) {
node.DEFMETHOD("negate", function(compressor, first_in_statement) {
return func.call(this, compressor, first_in_statement);