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boolean and if/exit optimizations

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Mihai Bazon
2012-09-03 23:49:57 +03:00
parent e5f1cec6aa
commit 86cfb5be86
1 changed files with 30 additions and 0 deletions
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30
lib/compress.js
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@@ -62,6 +62,7 @@ function Compressor(options, false_by_default) {
conditionals : !false_by_default,
comparations : !false_by_default,
evaluate : !false_by_default,
booleans : !false_by_default,
warnings : true
});
@@ -560,6 +561,17 @@ function Compressor(options, false_by_default) {
}).optimize(compressor)
});
}
if (self.body instanceof AST_Exit
&& self.alternative instanceof AST_Exit
&& self.body.TYPE == self.alternative.TYPE) {
return make_node(self.body.CTOR, self, {
value: make_node(AST_Conditional, self, {
condition : self.condition,
consequent : self.body.value,
alternative : self.alternative.value
}).optimize(compressor)
});
}
return self;
});
@@ -709,4 +721,22 @@ function Compressor(options, false_by_default) {
return self;
});
SQUEEZE(AST_True, function(self, compressor){
if (compressor.option("booleans")) return make_node(AST_UnaryPrefix, self, {
operator: "!",
expression: make_node(AST_Number, self, {
value: 0
})
});
});
SQUEEZE(AST_False, function(self, compressor){
if (compressor.option("booleans")) return make_node(AST_UnaryPrefix, self, {
operator: "!",
expression: make_node(AST_Number, self, {
value: 1
})
});
});
})();