diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/compress.js | 8 | ||||
| -rw-r--r-- | lib/transform.js | 226 |
2 files changed, 227 insertions, 7 deletions
diff --git a/lib/compress.js b/lib/compress.js index 5b0e06a0..6813925e 100644 --- a/lib/compress.js +++ b/lib/compress.js @@ -1014,6 +1014,7 @@ function Compressor(options, false_by_default) { self = self.clone(); self.expression = self.expression.squeeze(compressor); self.body = self.body.squeeze(compressor); + return self; }); SQUEEZE(AST_Exit, function(self, compressor){ @@ -1569,13 +1570,6 @@ function Compressor(options, false_by_default) { return self; }); - SQUEEZE(AST_Assign, function(self, compressor){ - self = self.clone(); - self.left = self.left.squeeze(compressor); - self.right = self.right.squeeze(compressor); - return self.optimize(compressor); - }); - SQUEEZE(AST_SymbolRef, function(self, compressor){ return self.optimize(compressor); }); diff --git a/lib/transform.js b/lib/transform.js new file mode 100644 index 00000000..743dd6e7 --- /dev/null +++ b/lib/transform.js @@ -0,0 +1,226 @@ +/*********************************************************************** + + A JavaScript tokenizer / parser / beautifier / compressor. + https://github.com/mishoo/UglifyJS2 + + -------------------------------- (C) --------------------------------- + + Author: Mihai Bazon + <mihai.bazon@gmail.com> + http://mihai.bazon.net/blog + + Distributed under the BSD license: + + Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com> + + Redistribution and use in source and binary forms, with or without + modification, are permitted provided that the following conditions + are met: + + * Redistributions of source code must retain the above + copyright notice, this list of conditions and the following + disclaimer. + + * Redistributions in binary form must reproduce the above + copyright notice, this list of conditions and the following + disclaimer in the documentation and/or other materials + provided with the distribution. + + THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY + EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE + LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, + OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR + PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR + TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF + THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + SUCH DAMAGE. + + ***********************************************************************/ + +// Tree transformer helpers. +// XXX: eventually I should refactor the compressor to use this infrastructure. + +function TreeTransformer(before, after) { + this.before = before; + this.after = after; + this.stack = []; +} + +TreeTransformer.prototype = { + push: function (node) { + this.stack.push(node); + }, + pop: function() { + return this.stack.pop(); + }, + parent: function (n) { + return this.stack[this.stack.length - 2 - (n || 0)]; + } +}; + +(function(undefined){ + + function _(node, descend) { + node.DEFMETHOD("transform", function(tw, in_list){ + var x, y; + tw.push(this); + x = tw.before(this, function(){ + descend(x, tw); + }, in_list); + if (x === undefined) { + x = this.clone(); + descend(x, tw); + y = tw.after(this, in_list); + if (y !== undefined) x = y; + } + tw.pop(); + return x; + }); + }; + + function do_list(list, tw) { + return MAP(list, function(node){ + return node.transform(tw, true); + }); + }; + + _(AST_Node, noop); + + _(AST_LabeledStatement, function(self, tw){ + self.label = self.label.transform(tw); + self.body = self.body.transform(tw); + }); + + _(AST_SimpleStatement, function(self, tw){ + self.body = self.body.transform(tw); + }); + + _(AST_BlockStatement, function(self, tw){ + self.body = do_list(self.body, tw); + }); + + _(AST_Block, function(self, tw){ + self.body = do_list(self.body, tw); + }); + + _(AST_DWLoop, function(self, tw){ + self.condition = self.condition.transform(tw); + self.body = self.body.transform(tw); + }); + + _(AST_For, function(self, tw){ + if (self.init) self.init = self.init.transform(tw); + if (self.condition) self.condition = self.condition.transform(tw); + if (self.step) self.step = self.step.transform(tw); + self.body = self.body.transform(tw); + }); + + _(AST_ForIn, function(self, tw){ + self.init = self.init.transform(tw); + self.object = self.object.transform(tw); + self.body = self.body.transform(tw); + }); + + _(AST_With, function(self, tw){ + self.expression = self.expression.transform(tw); + self.body = self.body.transform(tw); + }); + + _(AST_Exit, function(self, tw){ + if (self.value) self.value = self.value.transform(tw); + }); + + _(AST_LoopControl, function(self, tw){ + if (self.label) self.label = self.label.transform(tw); + }); + + _(AST_If, function(self, tw){ + self.condition = self.condition.transform(tw); + self.body = self.body.transform(tw); + if (self.alternative) self.alternative = self.alternative.transform(tw); + }); + + _(AST_Switch, function(self, tw){ + self.expression = self.expression.transform(tw); + self.body = self.body.transform(tw); + }); + + _(AST_Case, function(self, tw){ + self.expression = self.expression.transform(tw); + self.body = do_list(self.body, tw); + }); + + _(AST_Try, function(self, tw){ + self.body = do_list(self.body, tw); + }); + + _(AST_Catch, function(self, tw){ + self.argname = self.argname.transform(tw); + self.body = do_list(self.body, tw); + }); + + _(AST_Definitions, function(self, tw){ + self.definitions = do_list(self.definitions, tw); + }); + + _(AST_VarDef, function(self, tw){ + if (self.value) self.value = self.value.transform(tw); + }); + + _(AST_Lambda, function(self, tw){ + if (self.name) self.name = self.name.transform(tw); + self.argnames = do_list(self.argnames, tw); + self.body = do_list(self.body, tw); + }); + + _(AST_Call, function(self, tw){ + self.expression = self.expression.transform(tw); + self.args = do_list(self.args, tw); + }); + + _(AST_Seq, function(self, tw){ + self.car = self.car.transform(tw); + self.cdr = self.cdr.transform(tw); + }); + + _(AST_Dot, function(self, tw){ + self.expression = self.expression.transform(tw); + }); + + _(AST_Sub, function(self, tw){ + self.expression = self.expression.transform(tw); + self.property = self.property.transform(tw); + }); + + _(AST_Unary, function(self, tw){ + self.expression = self.expression.transform(tw); + }); + + _(AST_Binary, function(self, tw){ + self.left = self.left.transform(tw); + self.right = self.right.transform(tw); + }); + + _(AST_Conditional, function(self, tw){ + self.condition = self.condition.transform(tw); + self.consequent = self.consequent.transform(tw); + self.alternative = self.alternative.transform(tw); + }); + + _(AST_Array, function(self, tw){ + self.elements = do_list(self.elements, tw); + }); + + _(AST_Object, function(self, tw){ + self.properties = do_list(self.properties, tw); + }); + + _(AST_ObjectProperty, function(self, tw){ + self.value = self.value.transform(tw); + }); + +})(); |