// XXX: intentionally falling down to the next case
case "==":
case "!=":
- if (self.left instanceof AST_UnaryPrefix
- && self.left.operator == "typeof"
- && self.right instanceof AST_String
- && self.right.value == "undefined") {
- if (!(self.left.expression instanceof AST_SymbolRef)
- || !self.left.expression.undeclared()) {
- self.left = self.left.expression;
- self.right = make_node(AST_Undefined, self.right).optimize(compressor);
- if (self.operator.length == 2) self.operator += "=";
- }
+ if (self.right instanceof AST_Constant && !(self.left instanceof AST_Constant)) {
+ var tmp = self.left;
+ self.left = self.right;
+ self.right = tmp;
}
- else if (self.left instanceof AST_String
- && self.left.value == "undefined"
- && self.right instanceof AST_UnaryPrefix
- && self.right.operator == "typeof") {
+ if (self.left instanceof AST_String
+ && self.left.value == "undefined"
+ && self.right instanceof AST_UnaryPrefix
+ && self.right.operator == "typeof") {
if (!(self.right.expression instanceof AST_SymbolRef)
|| !self.right.expression.undeclared()) {
self.left = self.right.expression;