324 lines
		
	
	
		
			9.7 KiB
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
			
		
		
	
	
			324 lines
		
	
	
		
			9.7 KiB
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
/***********************************************************************
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  A JavaScript tokenizer / parser / beautifier / compressor.
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  https://github.com/mishoo/UglifyJS2
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  -------------------------------- (C) ---------------------------------
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                           Author: Mihai Bazon
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                         <mihai.bazon@gmail.com>
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                       http://mihai.bazon.net/blog
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  Distributed under the BSD license:
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    Copyright 2012 (c) Mihai Bazon <mihai.bazon@gmail.com>
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    Redistribution and use in source and binary forms, with or without
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    modification, are permitted provided that the following conditions
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    are met:
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        * Redistributions of source code must retain the above
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          copyright notice, this list of conditions and the following
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          disclaimer.
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        * Redistributions in binary form must reproduce the above
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          copyright notice, this list of conditions and the following
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          disclaimer in the documentation and/or other materials
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          provided with the distribution.
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    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER “AS IS” AND ANY
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    EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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    PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
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    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
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    OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
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    TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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    THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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    SUCH DAMAGE.
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 ***********************************************************************/
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"use strict";
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import {
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    AST_Array,
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    AST_Await,
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    AST_Binary,
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    AST_PrivateIn,
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    AST_Block,
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    AST_Call,
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    AST_Case,
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    AST_Catch,
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    AST_Chain,
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    AST_Class,
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    AST_ClassStaticBlock,
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    AST_Conditional,
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    AST_DefinitionsLike,
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    AST_Destructuring,
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    AST_Do,
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    AST_Exit,
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    AST_Expansion,
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    AST_Export,
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    AST_For,
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    AST_ForIn,
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    AST_If,
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    AST_Import,
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    AST_LabeledStatement,
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    AST_Lambda,
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    AST_LoopControl,
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    AST_NameMapping,
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    AST_Node,
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    AST_Number,
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    AST_Object,
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    AST_ObjectProperty,
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    AST_PrefixedTemplateString,
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    AST_PropAccess,
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    AST_Sequence,
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    AST_SimpleStatement,
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    AST_Sub,
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    AST_Switch,
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    AST_TemplateString,
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    AST_Try,
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    AST_Unary,
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    AST_VarDefLike,
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    AST_While,
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    AST_With,
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    AST_Yield,
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} from "./ast.js";
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import {
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    MAP as do_list,
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    noop,
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} from "./utils/index.js";
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function def_transform(node, descend) {
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    node.DEFMETHOD("transform", function(tw, in_list) {
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        let transformed = undefined;
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        tw.push(this);
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        if (tw.before) transformed = tw.before(this, descend, in_list);
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        if (transformed === undefined) {
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            transformed = this;
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            descend(transformed, tw);
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            if (tw.after) {
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                const after_ret = tw.after(transformed, in_list);
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                if (after_ret !== undefined) transformed = after_ret;
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            }
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        }
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        tw.pop();
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        return transformed;
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    });
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}
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def_transform(AST_Node, noop);
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def_transform(AST_LabeledStatement, function(self, tw) {
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    self.label = self.label.transform(tw);
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    self.body = self.body.transform(tw);
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});
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def_transform(AST_SimpleStatement, function(self, tw) {
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    self.body = self.body.transform(tw);
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});
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def_transform(AST_Block, function(self, tw) {
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    self.body = do_list(self.body, tw);
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});
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def_transform(AST_Do, function(self, tw) {
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    self.body = self.body.transform(tw);
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    self.condition = self.condition.transform(tw);
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});
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def_transform(AST_While, function(self, tw) {
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    self.condition = self.condition.transform(tw);
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    self.body = self.body.transform(tw);
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});
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def_transform(AST_For, function(self, tw) {
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    if (self.init) self.init = self.init.transform(tw);
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    if (self.condition) self.condition = self.condition.transform(tw);
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    if (self.step) self.step = self.step.transform(tw);
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    self.body = self.body.transform(tw);
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});
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def_transform(AST_ForIn, function(self, tw) {
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    self.init = self.init.transform(tw);
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    self.object = self.object.transform(tw);
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    self.body = self.body.transform(tw);
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});
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def_transform(AST_With, function(self, tw) {
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    self.expression = self.expression.transform(tw);
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    self.body = self.body.transform(tw);
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});
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def_transform(AST_Exit, function(self, tw) {
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    if (self.value) self.value = self.value.transform(tw);
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});
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def_transform(AST_LoopControl, function(self, tw) {
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    if (self.label) self.label = self.label.transform(tw);
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});
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def_transform(AST_If, function(self, tw) {
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    self.condition = self.condition.transform(tw);
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    self.body = self.body.transform(tw);
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    if (self.alternative) self.alternative = self.alternative.transform(tw);
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});
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def_transform(AST_Switch, function(self, tw) {
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    self.expression = self.expression.transform(tw);
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    self.body = do_list(self.body, tw);
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});
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def_transform(AST_Case, function(self, tw) {
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    self.expression = self.expression.transform(tw);
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    self.body = do_list(self.body, tw);
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});
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def_transform(AST_Try, function(self, tw) {
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    self.body = self.body.transform(tw);
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    if (self.bcatch) self.bcatch = self.bcatch.transform(tw);
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    if (self.bfinally) self.bfinally = self.bfinally.transform(tw);
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});
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def_transform(AST_Catch, function(self, tw) {
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    if (self.argname) self.argname = self.argname.transform(tw);
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    self.body = do_list(self.body, tw);
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});
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def_transform(AST_DefinitionsLike, function(self, tw) {
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    self.definitions = do_list(self.definitions, tw);
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});
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def_transform(AST_VarDefLike, function(self, tw) {
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    self.name = self.name.transform(tw);
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    if (self.value) self.value = self.value.transform(tw);
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});
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def_transform(AST_Destructuring, function(self, tw) {
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    self.names = do_list(self.names, tw);
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});
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def_transform(AST_Lambda, function(self, tw) {
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    if (self.name) self.name = self.name.transform(tw);
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    self.argnames = do_list(self.argnames, tw, /* allow_splicing */ false);
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    if (self.body instanceof AST_Node) {
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        self.body = self.body.transform(tw);
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    } else {
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        self.body = do_list(self.body, tw);
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    }
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});
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def_transform(AST_Call, function(self, tw) {
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    self.expression = self.expression.transform(tw);
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    self.args = do_list(self.args, tw, /* allow_splicing */ false);
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});
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def_transform(AST_Sequence, function(self, tw) {
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    const result = do_list(self.expressions, tw);
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    self.expressions = result.length
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        ? result
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        : [new AST_Number({ value: 0 })];
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});
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def_transform(AST_PropAccess, function(self, tw) {
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    self.expression = self.expression.transform(tw);
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});
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def_transform(AST_Sub, function(self, tw) {
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    self.expression = self.expression.transform(tw);
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    self.property = self.property.transform(tw);
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});
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def_transform(AST_Chain, function(self, tw) {
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    self.expression = self.expression.transform(tw);
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});
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def_transform(AST_Yield, function(self, tw) {
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    if (self.expression) self.expression = self.expression.transform(tw);
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});
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def_transform(AST_Await, function(self, tw) {
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    self.expression = self.expression.transform(tw);
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});
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def_transform(AST_Unary, function(self, tw) {
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    self.expression = self.expression.transform(tw);
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});
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def_transform(AST_Binary, function(self, tw) {
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    self.left = self.left.transform(tw);
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    self.right = self.right.transform(tw);
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});
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def_transform(AST_PrivateIn, function(self, tw) {
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    self.key = self.key.transform(tw);
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    self.value = self.value.transform(tw);
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});
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def_transform(AST_Conditional, function(self, tw) {
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    self.condition = self.condition.transform(tw);
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    self.consequent = self.consequent.transform(tw);
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    self.alternative = self.alternative.transform(tw);
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});
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def_transform(AST_Array, function(self, tw) {
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    self.elements = do_list(self.elements, tw);
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});
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def_transform(AST_Object, function(self, tw) {
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    self.properties = do_list(self.properties, tw);
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});
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def_transform(AST_ObjectProperty, function(self, tw) {
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    if (self.key instanceof AST_Node) {
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        self.key = self.key.transform(tw);
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    }
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    if (self.value) self.value = self.value.transform(tw);
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});
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def_transform(AST_Class, function(self, tw) {
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    if (self.name) self.name = self.name.transform(tw);
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    if (self.extends) self.extends = self.extends.transform(tw);
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    self.properties = do_list(self.properties, tw);
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});
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def_transform(AST_ClassStaticBlock, function(self, tw) {
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    self.body = do_list(self.body, tw);
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});
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def_transform(AST_Expansion, function(self, tw) {
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    self.expression = self.expression.transform(tw);
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});
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def_transform(AST_NameMapping, function(self, tw) {
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    self.foreign_name = self.foreign_name.transform(tw);
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    self.name = self.name.transform(tw);
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});
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def_transform(AST_Import, function(self, tw) {
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    if (self.imported_name) self.imported_name = self.imported_name.transform(tw);
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    if (self.imported_names) do_list(self.imported_names, tw);
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    self.module_name = self.module_name.transform(tw);
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});
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def_transform(AST_Export, function(self, tw) {
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    if (self.exported_definition) self.exported_definition = self.exported_definition.transform(tw);
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    if (self.exported_value) self.exported_value = self.exported_value.transform(tw);
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    if (self.exported_names) do_list(self.exported_names, tw);
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    if (self.module_name) self.module_name = self.module_name.transform(tw);
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});
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def_transform(AST_TemplateString, function(self, tw) {
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    self.segments = do_list(self.segments, tw);
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});
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def_transform(AST_PrefixedTemplateString, function(self, tw) {
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    self.prefix = self.prefix.transform(tw);
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    self.template_string = self.template_string.transform(tw);
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});
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